/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * drivers/parisc/gsc.h
 * Declarations for functions in gsc.c
 * Copyright (c) 2000-2002 Helge Deller, Matthew Wilcox
 */

#include <linux/interrupt.h>
#include <asm/hardware.h>
#include <asm/parisc-device.h>

#define OFFSET_IRR 0x0000   /* Interrupt request register */
#define OFFSET_IMR 0x0004   /* Interrupt mask register */
#define OFFSET_IPR 0x0008   /* Interrupt pending register */
#define OFFSET_ICR 0x000C   /* Interrupt control register */
#define OFFSET_IAR 0x0010   /* Interrupt address register */

/* PA I/O Architected devices support at least 5 bits in the EIM register. */
#define GSC_EIM_WIDTH 5

struct gsc_irq {
        unsigned long txn_addr; /* IRQ "target" */
        int txn_data;           /* HW "IRQ" */
        int irq;                /* virtual IRQ */
};

struct gsc_asic {
        struct parisc_device *gsc;
        unsigned long hpa;
        char *name;
        int version;
        int type;
        int eim;
        struct gsc_irq gsc_irq;
        int global_irq[32];
};

int gsc_common_setup(struct parisc_device *parent, struct gsc_asic *gsc_asic);
int gsc_alloc_irq(struct gsc_irq *dev);                 /* dev needs an irq */
int gsc_claim_irq(struct gsc_irq *dev, int irq);        /* dev needs this irq */
int gsc_assign_irq(struct irq_chip *type, void *data);
int gsc_find_local_irq(unsigned int irq, int *global_irq, int limit);
void gsc_fixup_irqs(struct parisc_device *parent, void *ctrl,
                void (*choose)(struct parisc_device *child, void *ctrl));
void gsc_asic_assign_irq(struct gsc_asic *asic, int local_irq, int *irqp);

irqreturn_t gsc_asic_intr(int irq, void *dev);