| Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 1 | #ifndef __ASM_AVR32_INTC_H |
| 2 | #define __ASM_AVR32_INTC_H |
| 3 | |
| 4 | #include <linux/sysdev.h> |
| 5 | #include <linux/interrupt.h> |
| 6 | |
| 7 | struct irq_controller; |
| 8 | struct irqaction; |
| 9 | struct pt_regs; |
| 10 | |
| 11 | struct platform_device; |
| 12 | |
| 13 | /* Information about the internal interrupt controller */ |
| 14 | struct 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 | |
| 35 | struct 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 | |
| 74 | struct 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 | |
| 82 | struct 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 | */ |
| 95 | extern struct intc_device intc; |
| 96 | |
| 97 | extern 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); |
| 101 | extern void free_internal_irq(unsigned int irq); |
| 102 | |
| 103 | /* Only used by time_init() */ |
| 104 | extern 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 | */ |
| 114 | extern int intc_set_priority(unsigned int group, |
| 115 | unsigned int priority); |
| 116 | |
| 117 | /* |
| 118 | * Returns a bitmask of pending interrupts in a group. |
| 119 | */ |
| 120 | extern 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 | */ |
| 126 | extern int intc_register_controller(struct irq_controller *ctrl); |
| 127 | |
| 128 | #endif /* __ASM_AVR32_INTC_H */ |