linux-imx

/*

 * Atmel AT91 common AIC (Advanced Interrupt Controller) code shared by

 * irq-atmel-aic and irq-atmel-aic5 drivers

 *

 *  Copyright (C) 2004 SAN People

 *  Copyright (C) 2004 ATMEL

 *  Copyright (C) Rick Bronson

 *  Copyright (C) 2014 Free Electrons

 *

 *  Author: Boris BREZILLON <boris.brezillon@free-electrons.com>

 *

 * This file is licensed under the terms of the GNU General Public

 * License version 2.  This program is licensed "as is" without any

 * warranty of any kind, whether express or implied.

 */

​

#include <linux/errno.h>

#include <linux/io.h>

#include <linux/irq.h>

#include <linux/irqdomain.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/slab.h>

​

#include "irq-atmel-aic-common.h"

​

#define AT91_AIC_PRIOR          GENMASK(2, 0)

#define AT91_AIC_IRQ_MIN_PRIORITY   0

#define AT91_AIC_IRQ_MAX_PRIORITY   7

​

#define AT91_AIC_SRCTYPE        GENMASK(6, 5)

#define AT91_AIC_SRCTYPE_LOW        (0 << 5)

#define AT91_AIC_SRCTYPE_FALLING    (1 << 5)

#define AT91_AIC_SRCTYPE_HIGH       (2 << 5)

#define AT91_AIC_SRCTYPE_RISING     (3 << 5)

​

struct aic_chip_data {

    u32 ext_irqs;

};

​

static void aic_common_shutdown(struct irq_data *d)

{

    struct irq_chip_type *ct = irq_data_get_chip_type(d);

​

    ct->chip.irq_mask(d);

}

​

int aic_common_set_type(struct irq_data *d, unsigned type, unsigned *val)

{

    struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);

    struct aic_chip_data *aic = gc->private;

    unsigned aic_type;

​

    switch (type) {

    case IRQ_TYPE_LEVEL_HIGH:

        aic_type = AT91_AIC_SRCTYPE_HIGH;

        break;

    case IRQ_TYPE_EDGE_RISING:

        aic_type = AT91_AIC_SRCTYPE_RISING;

        break;

    case IRQ_TYPE_LEVEL_LOW:

        if (!(d->mask & aic->ext_irqs))

            return -EINVAL;