// SPDX-License-Identifier: GPL-2.0
/*
 * arch/sh/boards/landisk/psw.c
 *
 * push switch support for LANDISK and USL-5P
 *
 * Copyright (C) 2006-2007  Paul Mundt
 * Copyright (C) 2007  kogiidena
 */
#include <linux/io.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <mach-landisk/mach/iodata_landisk.h>
#include <asm/push-switch.h>

static irqreturn_t psw_irq_handler(int irq, void *arg)
{
        struct platform_device *pdev = arg;
        struct push_switch *psw = platform_get_drvdata(pdev);
        struct push_switch_platform_info *psw_info = pdev->dev.platform_data;
        unsigned int sw_value;
        int ret = 0;

        sw_value = (0x0ff & (~__raw_readb(PA_STATUS)));

        /* Nothing to do if there's no state change */
        if (psw->state) {
                ret = 1;
                goto out;
        }

        /* Figure out who raised it */
        if (sw_value & (1 << psw_info->bit)) {
                psw->state = 1;
                mod_timer(&psw->debounce, jiffies + 50);
                ret = 1;
        }

out:
        /* Clear the switch IRQs */
        __raw_writeb(0x00, PA_PWRINT_CLR);

        return IRQ_RETVAL(ret);
}

static struct resource psw_power_resources[] = {
        [0] = {
                .start = IRQ_POWER,
                .flags = IORESOURCE_IRQ,
       },
};

static struct resource psw_usl5p_resources[] = {
        [0] = {
                .start = IRQ_BUTTON,
                .flags = IORESOURCE_IRQ,
        },
};

static struct push_switch_platform_info psw_power_platform_data = {
        .name           = "psw_power",
        .bit            = 4,
        .irq_flags      = IRQF_SHARED,
        .irq_handler    = psw_irq_handler,
};

static struct push_switch_platform_info psw1_platform_data = {
        .name           = "psw1",
        .bit            = 0,
        .irq_flags      = IRQF_SHARED,
        .irq_handler    = psw_irq_handler,
};

static struct push_switch_platform_info psw2_platform_data = {
        .name           = "psw2",
        .bit            = 2,
        .irq_flags      = IRQF_SHARED,
        .irq_handler    = psw_irq_handler,
};

static struct push_switch_platform_info psw3_platform_data = {
        .name           = "psw3",
        .bit            = 1,
        .irq_flags      = IRQF_SHARED,
        .irq_handler    = psw_irq_handler,
};

static struct platform_device psw_power_switch_device = {
        .name           = "push-switch",
        .id             = 0,
        .num_resources  = ARRAY_SIZE(psw_power_resources),
        .resource       = psw_power_resources,
        .dev            = {
                .platform_data = &psw_power_platform_data,
        },
};

static struct platform_device psw1_switch_device = {
        .name           = "push-switch",
        .id             = 1,
        .num_resources  = ARRAY_SIZE(psw_usl5p_resources),
        .resource       = psw_usl5p_resources,
        .dev            = {
                .platform_data = &psw1_platform_data,
        },
};

static struct platform_device psw2_switch_device = {
        .name           = "push-switch",
        .id             = 2,
        .num_resources  = ARRAY_SIZE(psw_usl5p_resources),
        .resource       = psw_usl5p_resources,
        .dev            = {
                .platform_data = &psw2_platform_data,
        },
};

static struct platform_device psw3_switch_device = {
        .name           = "push-switch",
        .id             = 3,
        .num_resources  = ARRAY_SIZE(psw_usl5p_resources),
        .resource       = psw_usl5p_resources,
        .dev = {
                .platform_data = &psw3_platform_data,
        },
};

static struct platform_device *psw_devices[] = {
        &psw_power_switch_device,
        &psw1_switch_device,
        &psw2_switch_device,
        &psw3_switch_device,
};

static int __init psw_init(void)
{
        return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));
}
device_initcall(psw_init);