drivers/parisc/gsc.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * drivers/parisc/gsc.h
   4  * Declarations for functions in gsc.c
   5  * Copyright (c) 2000-2002 Helge Deller, Matthew Wilcox
   6  */
   7
   8 #include <linux/interrupt.h>
   9 #include <asm/hardware.h>
  10 #include <asm/parisc-device.h>
  11
  12 #define OFFSET_IRR 0x0000   /* Interrupt request register */
  13 #define OFFSET_IMR 0x0004   /* Interrupt mask register */
  14 #define OFFSET_IPR 0x0008   /* Interrupt pending register */
  15 #define OFFSET_ICR 0x000C   /* Interrupt control register */
  16 #define OFFSET_IAR 0x0010   /* Interrupt address register */
  17
  18 /* PA I/O Architected devices support at least 5 bits in the EIM register. */
  19 #define GSC_EIM_WIDTH 5
  20
  21 struct gsc_irq {
  22         unsigned long txn_addr; /* IRQ "target" */
  23         int txn_data;           /* HW "IRQ" */
  24         int irq;                /* virtual IRQ */
  25 };
  26
  27 struct gsc_asic {
  28         struct parisc_device *gsc;
  29         unsigned long hpa;
  30         char *name;
  31         int version;
  32         int type;
  33         int eim;
  34         int global_irq[32];
  35 };
  36
  37 int gsc_common_setup(struct parisc_device *parent, struct gsc_asic *gsc_asic);
  38 int gsc_alloc_irq(struct gsc_irq *dev);                 /* dev needs an irq */
  39 int gsc_claim_irq(struct gsc_irq *dev, int irq);        /* dev needs this irq */
  40 int gsc_assign_irq(struct irq_chip *type, void *data);
  41 int gsc_find_local_irq(unsigned int irq, int *global_irq, int limit);
  42 void gsc_fixup_irqs(struct parisc_device *parent, void *ctrl,
  43                 void (*choose)(struct parisc_device *child, void *ctrl));
  44 void gsc_asic_assign_irq(struct gsc_asic *asic, int local_irq, int *irqp);
  45
  46 irqreturn_t gsc_asic_intr(int irq, void *dev);