linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * Interrupt management for most GSC and related devices.

 *

 * (c) Copyright 1999 Alex deVries for The Puffin Group

 * (c) Copyright 1999 Grant Grundler for Hewlett-Packard

 * (c) Copyright 1999 Matthew Wilcox

 * (c) Copyright 2000 Helge Deller

 * (c) Copyright 2001 Matthew Wilcox for Hewlett-Packard

 */

​

#include <linux/bitops.h>

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/ioport.h>

#include <linux/module.h>

#include <linux/types.h>

​

#include <asm/hardware.h>

#include <asm/io.h>

​

#include "gsc.h"

​

#undef DEBUG

​

#ifdef DEBUG

#define DEBPRINTK printk

#else

#define DEBPRINTK(x,...)

#endif

​

int gsc_alloc_irq(struct gsc_irq *i)

{

    int irq = txn_alloc_irq(GSC_EIM_WIDTH);

    if (irq < 0) {

        printk("cannot get irq\n");

        return irq;

    }

​

    i->txn_addr = txn_alloc_addr(irq);

    i->txn_data = txn_alloc_data(irq);

    i->irq = irq;

​

    return irq;

}

​

int gsc_claim_irq(struct gsc_irq *i, int irq)

{

    int c = irq;

​

    irq += CPU_IRQ_BASE; /* virtualize the IRQ first */

​

    irq = txn_claim_irq(irq);

    if (irq < 0) {

        printk("cannot claim irq %d\n", c);

        return irq;

    }

​

    i->txn_addr = txn_alloc_addr(irq);

    i->txn_data = txn_alloc_data(irq);

    i->irq = irq;

​