144 lines
3.2 KiB
C
144 lines
3.2 KiB
C
/*
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* arch/sh/boards/landisk/psw.c
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*
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* push switch support for LANDISK and USL-5P
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*
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* Copyright (C) 2006-2007 Paul Mundt
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* Copyright (C) 2007 kogiidena
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/io.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <mach-landisk/mach/iodata_landisk.h>
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#include <asm/push-switch.h>
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static irqreturn_t psw_irq_handler(int irq, void *arg)
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{
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struct platform_device *pdev = arg;
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struct push_switch *psw = platform_get_drvdata(pdev);
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struct push_switch_platform_info *psw_info = pdev->dev.platform_data;
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unsigned int sw_value;
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int ret = 0;
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sw_value = (0x0ff & (~__raw_readb(PA_STATUS)));
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/* Nothing to do if there's no state change */
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if (psw->state) {
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ret = 1;
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goto out;
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}
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/* Figure out who raised it */
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if (sw_value & (1 << psw_info->bit)) {
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psw->state = 1;
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mod_timer(&psw->debounce, jiffies + 50);
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ret = 1;
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}
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out:
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/* Clear the switch IRQs */
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__raw_writeb(0x00, PA_PWRINT_CLR);
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return IRQ_RETVAL(ret);
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}
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static struct resource psw_power_resources[] = {
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[0] = {
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.start = IRQ_POWER,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource psw_usl5p_resources[] = {
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[0] = {
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.start = IRQ_BUTTON,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct push_switch_platform_info psw_power_platform_data = {
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.name = "psw_power",
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.bit = 4,
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.irq_flags = IRQF_SHARED,
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.irq_handler = psw_irq_handler,
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};
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static struct push_switch_platform_info psw1_platform_data = {
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.name = "psw1",
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.bit = 0,
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.irq_flags = IRQF_SHARED,
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.irq_handler = psw_irq_handler,
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};
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static struct push_switch_platform_info psw2_platform_data = {
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.name = "psw2",
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.bit = 2,
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.irq_flags = IRQF_SHARED,
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.irq_handler = psw_irq_handler,
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};
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static struct push_switch_platform_info psw3_platform_data = {
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.name = "psw3",
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.bit = 1,
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.irq_flags = IRQF_SHARED,
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.irq_handler = psw_irq_handler,
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};
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static struct platform_device psw_power_switch_device = {
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.name = "push-switch",
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.id = 0,
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.num_resources = ARRAY_SIZE(psw_power_resources),
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.resource = psw_power_resources,
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.dev = {
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.platform_data = &psw_power_platform_data,
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},
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};
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static struct platform_device psw1_switch_device = {
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.name = "push-switch",
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.id = 1,
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.num_resources = ARRAY_SIZE(psw_usl5p_resources),
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.resource = psw_usl5p_resources,
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.dev = {
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.platform_data = &psw1_platform_data,
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},
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};
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static struct platform_device psw2_switch_device = {
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.name = "push-switch",
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.id = 2,
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.num_resources = ARRAY_SIZE(psw_usl5p_resources),
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.resource = psw_usl5p_resources,
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.dev = {
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.platform_data = &psw2_platform_data,
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},
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};
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static struct platform_device psw3_switch_device = {
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.name = "push-switch",
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.id = 3,
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.num_resources = ARRAY_SIZE(psw_usl5p_resources),
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.resource = psw_usl5p_resources,
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.dev = {
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.platform_data = &psw3_platform_data,
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},
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};
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static struct platform_device *psw_devices[] = {
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&psw_power_switch_device,
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&psw1_switch_device,
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&psw2_switch_device,
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&psw3_switch_device,
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};
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static int __init psw_init(void)
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{
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return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices));
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}
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module_init(psw_init);
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