linux-imx

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

//

// Copyright (C) 2006, 2019 Texas Instruments.

//

// Interrupt handler for DaVinci boards.

​

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/irqchip/irq-davinci-aintc.h>

#include <linux/io.h>

#include <linux/irqdomain.h>

​

#include <asm/exception.h>

​

#define DAVINCI_AINTC_FIQ_REG0      0x00

#define DAVINCI_AINTC_FIQ_REG1      0x04

#define DAVINCI_AINTC_IRQ_REG0      0x08

#define DAVINCI_AINTC_IRQ_REG1      0x0c

#define DAVINCI_AINTC_IRQ_IRQENTRY  0x14

#define DAVINCI_AINTC_IRQ_ENT_REG0  0x18

#define DAVINCI_AINTC_IRQ_ENT_REG1  0x1c

#define DAVINCI_AINTC_IRQ_INCTL_REG 0x20

#define DAVINCI_AINTC_IRQ_EABASE_REG    0x24

#define DAVINCI_AINTC_IRQ_INTPRI0_REG   0x30

#define DAVINCI_AINTC_IRQ_INTPRI7_REG   0x4c

​

static void __iomem *davinci_aintc_base;

static struct irq_domain *davinci_aintc_irq_domain;

​

static inline void davinci_aintc_writel(unsigned long value, int offset)

{

    writel_relaxed(value, davinci_aintc_base + offset);

}

​

static inline unsigned long davinci_aintc_readl(int offset)

{

    return readl_relaxed(davinci_aintc_base + offset);

}

​

static __init void

davinci_aintc_setup_gc(void __iomem *base,

               unsigned int irq_start, unsigned int num)

{

    struct irq_chip_generic *gc;

    struct irq_chip_type *ct;

​

    gc = irq_get_domain_generic_chip(davinci_aintc_irq_domain, irq_start);

    gc->reg_base = base;

    gc->irq_base = irq_start;

​

    ct = gc->chip_types;

    ct->chip.irq_ack = irq_gc_ack_set_bit;

    ct->chip.irq_mask = irq_gc_mask_clr_bit;

    ct->chip.irq_unmask = irq_gc_mask_set_bit;

​

    ct->regs.ack = DAVINCI_AINTC_IRQ_REG0;

    ct->regs.mask = DAVINCI_AINTC_IRQ_ENT_REG0;

    irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,

                   IRQ_NOREQUEST | IRQ_NOPROBE, 0);

}

​