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 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 60 static inline int of_irq_count(struct device_node *dev) 61 { 62 return 0; 63 } 64 static inline int of_irq_get(struct device_node *dev, int index) 65 { 66 return 0; 67 } 68 static inline int of_irq_get_byname(struct device_node *dev, const char *name) 69 { 70 return 0; 71 } 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 } 77 static inline void *of_irq_find_parent(struct device_node *child) 78 { 79 return NULL; 80 } 81 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 } 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 } 93 static inline void of_msi_configure(struct device *dev, struct device_node *np) 94 { 95 } 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 */ 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