drivers/parisc/gsc.h

   1 /*
   2  * drivers/parisc/gsc.h
   3  * Declarations for functions in gsc.c
   4  * Copyright (c) 2000-2002 Helge Deller, Matthew Wilcox
   5  *
   6  * Distributed under the terms of the GPL, version 2
   7  */
   8
   9 #include <linux/interrupt.h>
  10 #include <asm/hardware.h>
  11 #include <asm/parisc-device.h>
  12
  13 #define OFFSET_IRR 0x0000   /* Interrupt request register */
  14 #define OFFSET_IMR 0x0004   /* Interrupt mask register */
  15 #define OFFSET_IPR 0x0008   /* Interrupt pending register */
  16 #define OFFSET_ICR 0x000C   /* Interrupt control register */
  17 #define OFFSET_IAR 0x0010   /* Interrupt address register */
  18
  19 /* PA I/O Architected devices support at least 5 bits in the EIM register. */
  20 #define GSC_EIM_WIDTH 5
  21
  22 struct gsc_irq {
  23         unsigned long txn_addr; /* IRQ "target" */
  24         int txn_data;           /* HW "IRQ" */
  25         int irq;                /* virtual IRQ */
  26 };
  27
  28 struct busdevice {
  29         struct parisc_device *gsc;
  30         unsigned long hpa;
  31         char *name;
  32         int version;
  33         int type;
  34         int parent_irq;
  35         int eim;
  36         struct irq_region *busdev_region;
  37 };
  38
  39 /* short cut to keep the compiler happy */
  40 #define BUSDEV_DEV(x)   ((struct busdevice *) (x))
  41
  42 int gsc_common_irqsetup(struct parisc_device *parent, struct busdevice *busdev);
  43 extern int gsc_alloc_irq(struct gsc_irq *dev);  /* dev needs an irq */
  44 extern int gsc_claim_irq(struct gsc_irq *dev, int irq); /* dev needs this irq */
  45
  46 irqreturn_t busdev_barked(int busdev_irq, void *dev, struct pt_regs *regs);