include/linux/of_irq.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __OF_IRQ_H
0003 #define __OF_IRQ_H
0004
0005 #include <linux/types.h>
0006 #include <linux/errno.h>
0007 #include <linux/irq.h>
0008 #include <linux/irqdomain.h>
0009 #include <linux/ioport.h>
0010 #include <linux/of.h>
0011
0012 typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
0013
0014 /*
0015  * Workarounds only applied to 32bit powermac machines
0016  */
0017 #define OF_IMAP_OLDWORLD_MAC    0x00000001
0018 #define OF_IMAP_NO_PHANDLE  0x00000002
0019
0020 #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
0021 extern unsigned int of_irq_workarounds;
0022 extern struct device_node *of_irq_dflt_pic;
0023 int of_irq_parse_oldworld(const struct device_node *device, int index,
0024               struct of_phandle_args *out_irq);
0025 #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
0026 #define of_irq_workarounds (0)
0027 #define of_irq_dflt_pic (NULL)
0028 static inline int of_irq_parse_oldworld(const struct device_node *device, int index,
0029                       struct of_phandle_args *out_irq)
0030 {
0031     return -EINVAL;
0032 }
0033 #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
0034
0035 extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
0036 extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
0037 extern int of_irq_to_resource(struct device_node *dev, int index,
0038                   struct resource *r);
0039
0040 extern void of_irq_init(const struct of_device_id *matches);
0041
0042 #ifdef CONFIG_OF_IRQ
0043 extern int of_irq_parse_one(struct device_node *device, int index,
0044               struct of_phandle_args *out_irq);
0045 extern int of_irq_count(struct device_node *dev);
0046 extern int of_irq_get(struct device_node *dev, int index);
0047 extern int of_irq_get_byname(struct device_node *dev, const char *name);
0048 extern int of_irq_to_resource_table(struct device_node *dev,
0049         struct resource *res, int nr_irqs);
0050 extern struct device_node *of_irq_find_parent(struct device_node *child);
0051 extern struct irq_domain *of_msi_get_domain(struct device *dev,
0052                         struct device_node *np,
0053                         enum irq_domain_bus_token token);
0054 extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
0055                             u32 id,
0056                             u32 bus_token);
0057 extern void of_msi_configure(struct device *dev, struct device_node *np);
0058 u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
0059 #else
0060 static inline int of_irq_parse_one(struct device_node *device, int index,
0061                    struct of_phandle_args *out_irq)
0062 {
0063     return -EINVAL;
0064 }
0065 static inline int of_irq_count(struct device_node *dev)
0066 {
0067     return 0;
0068 }
0069 static inline int of_irq_get(struct device_node *dev, int index)
0070 {
0071     return 0;
0072 }
0073 static inline int of_irq_get_byname(struct device_node *dev, const char *name)
0074 {
0075     return 0;
0076 }
0077 static inline int of_irq_to_resource_table(struct device_node *dev,
0078                        struct resource *res, int nr_irqs)
0079 {
0080     return 0;
0081 }
0082 static inline void *of_irq_find_parent(struct device_node *child)
0083 {
0084     return NULL;
0085 }
0086
0087 static inline struct irq_domain *of_msi_get_domain(struct device *dev,
0088                            struct device_node *np,
0089                            enum irq_domain_bus_token token)
0090 {
0091     return NULL;
0092 }
0093 static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
0094                         u32 id, u32 bus_token)
0095 {
0096     return NULL;
0097 }
0098 static inline void of_msi_configure(struct device *dev, struct device_node *np)
0099 {
0100 }
0101 static inline u32 of_msi_map_id(struct device *dev,
0102                  struct device_node *msi_np, u32 id_in)
0103 {
0104     return id_in;
0105 }
0106 #endif
0107
0108 #if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
0109 /*
0110  * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
0111  * implements it differently.  However, the prototype is the same for all,
0112  * so declare it here regardless of the CONFIG_OF_IRQ setting.
0113  */
0114 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
0115
0116 #else /* !CONFIG_OF && !CONFIG_SPARC */
0117 static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
0118                         int index)
0119 {
0120     return 0;
0121 }
0122 #endif /* !CONFIG_OF */
0123
0124 #endif /* __OF_IRQ_H */