1 #ifndef __OF_IRQ_H 2 #define __OF_IRQ_H 3 4 #if defined(CONFIG_OF) 5 struct of_irq; 6 #include <linux/types.h> 7 #include <linux/errno.h> 8 #include <linux/irq.h> 9 #include <linux/irqdomain.h> 10 #include <linux/ioport.h> 11 #include <linux/of.h> 12 13 /* 14 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC 15 * implements it differently. However, the prototype is the same for all, 16 * so declare it here regardless of the CONFIG_OF_IRQ setting. 17 */ 18 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index); 19 20 #if defined(CONFIG_OF_IRQ) 21 /** 22 * of_irq - container for device_node/irq_specifier pair for an irq controller 23 * @controller: pointer to interrupt controller device tree node 24 * @size: size of interrupt specifier 25 * @specifier: array of cells @size long specifing the specific interrupt 26 * 27 * This structure is returned when an interrupt is mapped. The controller 28 * field needs to be put() after use 29 */ 30 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */ 31 struct of_irq { 32 struct device_node *controller; /* Interrupt controller node */ 33 u32 size; /* Specifier size */ 34 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */ 35 }; 36 37 typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *); 38 39 /* 40 * Workarounds only applied to 32bit powermac machines 41 */ 42 #define OF_IMAP_OLDWORLD_MAC 0x00000001 43 #define OF_IMAP_NO_PHANDLE 0x00000002 44 45 #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC) 46 extern unsigned int of_irq_workarounds; 47 extern struct device_node *of_irq_dflt_pic; 48 extern int of_irq_map_oldworld(struct device_node *device, int index, 49 struct of_irq *out_irq); 50 #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */ 51 #define of_irq_workarounds (0) 52 #define of_irq_dflt_pic (NULL) 53 static inline int of_irq_map_oldworld(struct device_node *device, int index, 54 struct of_irq *out_irq) 55 { 56 return -EINVAL; 57 } 58 #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */ 59 60 61 extern int of_irq_map_raw(struct device_node *parent, const __be32 *intspec, 62 u32 ointsize, const __be32 *addr, 63 struct of_irq *out_irq); 64 extern int of_irq_map_one(struct device_node *device, int index, 65 struct of_irq *out_irq); 66 extern unsigned int irq_create_of_mapping(struct device_node *controller, 67 const u32 *intspec, 68 unsigned int intsize); 69 extern int of_irq_to_resource(struct device_node *dev, int index, 70 struct resource *r); 71 extern int of_irq_count(struct device_node *dev); 72 extern int of_irq_to_resource_table(struct device_node *dev, 73 struct resource *res, int nr_irqs); 74 extern struct device_node *of_irq_find_parent(struct device_node *child); 75 76 extern void of_irq_init(const struct of_device_id *matches); 77 78 #endif /* CONFIG_OF_IRQ */ 79 80 #else /* !CONFIG_OF */ 81 static inline unsigned int irq_of_parse_and_map(struct device_node *dev, 82 int index) 83 { 84 return 0; 85 } 86 87 static inline void *of_irq_find_parent(struct device_node *child) 88 { 89 return NULL; 90 } 91 #endif /* !CONFIG_OF */ 92 93 #endif /* __OF_IRQ_H */ 94