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) 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 rid); 56 extern void of_msi_configure(struct device *dev, struct device_node *np); 57 u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in); 58 #else 59 static inline int of_irq_count(struct device_node *dev) 60 { 61 return 0; 62 } 63 static inline int of_irq_get(struct device_node *dev, int index) 64 { 65 return 0; 66 } 67 static inline int of_irq_get_byname(struct device_node *dev, const char *name) 68 { 69 return 0; 70 } 71 static inline int of_irq_to_resource_table(struct device_node *dev, 72 struct resource *res, int nr_irqs) 73 { 74 return 0; 75 } 76 static inline void *of_irq_find_parent(struct device_node *child) 77 { 78 return NULL; 79 } 80 81 static 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 } 87 static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev, 88 u32 rid) 89 { 90 return NULL; 91 } 92 static inline void of_msi_configure(struct device *dev, struct device_node *np) 93 { 94 } 95 static 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 */ 108 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index); 109 110 #else /* !CONFIG_OF && !CONFIG_SPARC */ 111 static 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