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Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -07001#ifndef __ASM_AVR32_INTC_H
2#define __ASM_AVR32_INTC_H
3
4#include <linux/sysdev.h>
5#include <linux/interrupt.h>
6
7struct irq_controller;
8struct irqaction;
9struct pt_regs;
10
11struct platform_device;
12
13/* Information about the internal interrupt controller */
14struct intc_device {
15 /* ioremapped address of configuration block */
16 void __iomem *regs;
17
18 /* the physical device */
19 struct platform_device *pdev;
20
21 /* Number of interrupt lines per group. */
22 unsigned int irqs_per_group;
23
24 /* The highest group ID + 1 */
25 unsigned int nr_groups;
26
27 /*
28 * Bitfield indicating which groups are actually in use. The
29 * size of the array is
30 * ceil(group_max / (8 * sizeof(unsigned int))).
31 */
32 unsigned int group_mask[];
33};
34
35struct irq_controller_class {
36 /*
37 * A short name identifying this kind of controller.
38 */
39 const char *typename;
40 /*
41 * Handle the IRQ. Must do any necessary acking and masking.
42 */
43 irqreturn_t (*handle)(int irq, void *dev_id, struct pt_regs *regs);
44 /*
45 * Register a new IRQ handler.
46 */
47 int (*setup)(struct irq_controller *ctrl, unsigned int irq,
48 struct irqaction *action);
49 /*
50 * Unregister a IRQ handler.
51 */
52 void (*free)(struct irq_controller *ctrl, unsigned int irq,
53 void *dev_id);
54 /*
55 * Mask the IRQ in the interrupt controller.
56 */
57 void (*mask)(struct irq_controller *ctrl, unsigned int irq);
58 /*
59 * Unmask the IRQ in the interrupt controller.
60 */
61 void (*unmask)(struct irq_controller *ctrl, unsigned int irq);
62 /*
63 * Set the type of the IRQ. See below for possible types.
64 * Return -EINVAL if a given type is not supported
65 */
66 int (*set_type)(struct irq_controller *ctrl, unsigned int irq,
67 unsigned int type);
68 /*
69 * Return the IRQ type currently set
70 */
71 unsigned int (*get_type)(struct irq_controller *ctrl, unsigned int irq);
72};
73
74struct irq_controller {
75 struct irq_controller_class *class;
76 unsigned int irq_group;
77 unsigned int first_irq;
78 unsigned int nr_irqs;
79 struct list_head list;
80};
81
82struct intc_group_desc {
83 struct irq_controller *ctrl;
84 irqreturn_t (*handle)(int, void *, struct pt_regs *);
85 unsigned long flags;
86 void *dev_id;
87 const char *devname;
88};
89
90/*
91 * The internal interrupt controller. Defined in board/part-specific
92 * devices.c.
93 * TODO: Should probably be defined per-cpu.
94 */
95extern struct intc_device intc;
96
97extern int request_internal_irq(unsigned int irq,
98 irqreturn_t (*handler)(int, void *, struct pt_regs *),
99 unsigned long irqflags,
100 const char *devname, void *dev_id);
101extern void free_internal_irq(unsigned int irq);
102
103/* Only used by time_init() */
104extern int setup_internal_irq(unsigned int irq, struct intc_group_desc *desc);
105
106/*
107 * Set interrupt priority for a given group. `group' can be found by
108 * using irq_to_group(irq). Priority can be from 0 (lowest) to 3
109 * (highest). Higher-priority interrupts will preempt lower-priority
110 * interrupts (unless interrupts are masked globally).
111 *
112 * This function does not check for conflicts within a group.
113 */
114extern int intc_set_priority(unsigned int group,
115 unsigned int priority);
116
117/*
118 * Returns a bitmask of pending interrupts in a group.
119 */
120extern unsigned long intc_get_pending(unsigned int group);
121
122/*
123 * Register a new external interrupt controller. Returns the first
124 * external IRQ number that is assigned to the new controller.
125 */
126extern int intc_register_controller(struct irq_controller *ctrl);
127
128#endif /* __ASM_AVR32_INTC_H */