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 int 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) 28 static 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 35 extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq); 36 extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data); 37 extern int of_irq_to_resource(struct device_node *dev, int index, 38 struct resource *r); 39 40 #ifdef CONFIG_OF_IRQ 41 extern void of_irq_init(const struct of_device_id *matches); 42 extern int of_irq_parse_one(struct device_node *device, int index, 43 struct of_phandle_args *out_irq); 44 extern int of_irq_count(struct device_node *dev); 45 extern int of_irq_get(struct device_node *dev, int index); 46 extern int of_irq_get_byname(struct device_node *dev, const char *name); 47 extern int of_irq_to_resource_table(struct device_node *dev, 48 struct resource *res, int nr_irqs); 49 extern struct device_node *of_irq_find_parent(struct device_node *child); 50 extern struct irq_domain *of_msi_get_domain(struct device *dev, 51 struct device_node *np, 52 enum irq_domain_bus_token token); 53 extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev, 54 u32 id, 55 u32 bus_token); 56 extern void of_msi_configure(struct device *dev, struct device_node *np); 57 u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in); 58 #else 59 static inline void of_irq_init(const struct of_device_id *matches) 60 { 61 } 62 static inline int of_irq_parse_one(struct device_node *device, int index, 63 struct of_phandle_args *out_irq) 64 { 65 return -EINVAL; 66 } 67 static inline int of_irq_count(struct device_node *dev) 68 { 69 return 0; 70 } 71 static inline int of_irq_get(struct device_node *dev, int index) 72 { 73 return 0; 74 } 75 static inline int of_irq_get_byname(struct device_node *dev, const char *name) 76 { 77 return 0; 78 } 79 static inline int of_irq_to_resource_table(struct device_node *dev, 80 struct resource *res, int nr_irqs) 81 { 82 return 0; 83 } 84 static inline void *of_irq_find_parent(struct device_node *child) 85 { 86 return NULL; 87 } 88 89 static inline struct irq_domain *of_msi_get_domain(struct device *dev, 90 struct device_node *np, 91 enum irq_domain_bus_token token) 92 { 93 return NULL; 94 } 95 static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev, 96 u32 id, u32 bus_token) 97 { 98 return NULL; 99 } 100 static inline void of_msi_configure(struct device *dev, struct device_node *np) 101 { 102 } 103 static inline u32 of_msi_map_id(struct device *dev, 104 struct device_node *msi_np, u32 id_in) 105 { 106 return id_in; 107 } 108 #endif 109 110 #if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC) 111 /* 112 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC 113 * implements it differently. However, the prototype is the same for all, 114 * so declare it here regardless of the CONFIG_OF_IRQ setting. 115 */ 116 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index); 117 118 #else /* !CONFIG_OF && !CONFIG_SPARC */ 119 static inline unsigned int irq_of_parse_and_map(struct device_node *dev, 120 int index) 121 { 122 return 0; 123 } 124 #endif /* !CONFIG_OF */ 125 126 #endif /* __OF_IRQ_H */ 127