[mirror_ubuntu-artful-kernel.git] / include / linux / of_irq.h

#ifndef __OF_IRQ_H
#define __OF_IRQ_H

#if defined(CONFIG_OF)
struct of_irq;
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/irq.h>
#include <linux/ioport.h>
#include <linux/of.h>

/*
 * irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
 * implements it differently.  However, the prototype is the same for all,
 * so declare it here regardless of the CONFIG_OF_IRQ setting.
 */
extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);

#if defined(CONFIG_OF_IRQ)
/**
 * of_irq - container for device_node/irq_specifier pair for an irq controller
 * @controller: pointer to interrupt controller device tree node
 * @size: size of interrupt specifier
 * @specifier: array of cells @size long specifing the specific interrupt
 *
 * This structure is returned when an interrupt is mapped. The controller
 * field needs to be put() after use
 */
#define OF_MAX_IRQ_SPEC		4 /* We handle specifiers of at most 4 cells */
struct of_irq {
	struct device_node *controller; /* Interrupt controller node */
	u32 size; /* Specifier size */
	u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
};

typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);

/*
 * Workarounds only applied to 32bit powermac machines
 */
#define OF_IMAP_OLDWORLD_MAC	0x00000001
#define OF_IMAP_NO_PHANDLE	0x00000002

#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
extern unsigned int of_irq_workarounds;
extern struct device_node *of_irq_dflt_pic;
extern int of_irq_map_oldworld(struct device_node *device, int index,
			       struct of_irq *out_irq);
#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
#define of_irq_workarounds (0)
#define of_irq_dflt_pic (NULL)
static inline int of_irq_map_oldworld(struct device_node *device, int index,
				      struct of_irq *out_irq)
{
	return -EINVAL;
}
#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */


extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
			  u32 ointsize, const u32 *addr,
			  struct of_irq *out_irq);
extern int of_irq_map_one(struct device_node *device, int index,
			  struct of_irq *out_irq);
extern unsigned int irq_create_of_mapping(struct device_node *controller,
					  const u32 *intspec,
					  unsigned int intsize);
#ifdef CONFIG_IRQ_DOMAIN
extern void irq_dispose_mapping(unsigned int irq);
#endif
extern int of_irq_to_resource(struct device_node *dev, int index,
			      struct resource *r);
extern int of_irq_count(struct device_node *dev);
extern int of_irq_to_resource_table(struct device_node *dev,
		struct resource *res, int nr_irqs);
extern struct device_node *of_irq_find_parent(struct device_node *child);

extern void of_irq_init(const struct of_device_id *matches);

#endif /* CONFIG_OF_IRQ */
#endif /* CONFIG_OF */
#endif /* __OF_IRQ_H */
Commit	Line	Data
e3873444 GL	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>
7dc2e113	7	#include <linux/errno.h>
530719b2	8	#include <linux/irq.h>
7dc2e113	9	#include <linux/ioport.h>
e3873444 GL	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
c71a54b0 RH	36	typedef int (of_irq_init_cb_t)(struct device_node , struct device_node *);
c71a54b0 RH	37
7dc2e113 GL	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);
e3873444 GL	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);
08a543ad GL	68	#ifdef CONFIG_IRQ_DOMAIN
	69	extern void irq_dispose_mapping(unsigned int irq);
	70	#endif
7dc2e113 GL	71	extern int of_irq_to_resource(struct device_node *dev, int index,
7dc2e113 GL	72	struct resource *r);
52f6537c AS	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);
0b2e9a8e	76	extern struct device_node of_irq_find_parent(struct device_node child);
e3873444	77
c71a54b0	78	extern void of_irq_init(const struct of_device_id *matches);
08a543ad	79
e3873444 GL	80	#endif /* CONFIG_OF_IRQ */
	81	#endif /* CONFIG_OF */
	82	#endif /* __OF_IRQ_H */