/*
* arch/sh/boards/landisk/psw.c
*
* push switch support for LANDISK and USL-5P
*
* Copyright (C) 2006-2007 Paul Mundt
* Copyright (C) 2007 kogiidena
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#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));
}
module_init(psw_init);
