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