include/asm-avr32/intc.h

   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 */