#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?
#include?
#include?

#include?
#include?
#include?

#define?DEVICE_NAME?????“buttons“

struct?button_irq_desc?{
????int?irq;
????int?number;
????char?*name;	
};

static?struct?button_irq_desc?button_irqs?[]?=?{
????{IRQ_EINT（?0）?0?“KEY0“}
????{IRQ_EINT（18）?1?“KEY1“}
};
static?volatile?char?key_values?[]?=?{‘0‘?‘0‘};

static?DECLARE_WAIT_QUEUE_HEAD（button_waitq）;

static?volatile?int?ev_press?=?0;


static?irqreturn_t?buttons_interrupt（int?irq?void?*dev_id）
{
	struct?button_irq_desc?*button_irqs?=?（struct?button_irq_desc?*）dev_id;
	int?down;
	int?number;
	unsigned?tmp;

	udelay（0）;
	number?=?button_irqs->number;
	switch（number）?{
	case?0:?
		tmp?=?readl（S3C64XX_GPNDAT）;
		down?=?!（tmp?&?（1<		break;
	case?1:
		tmp?=?readl（S3C64XX_GPLDAT）;
		down?=?!（tmp?&?（1?<		break;
	default:
		down?=?0;
	}

	if?（down?!=?（key_values[number]?&?1））?{
		key_values[number]?=?‘0‘?+?down;

????????	ev_press?=?1;
????????	wake_up_interruptible（&button_waitq）;
????	}

????return?IRQ_RETVAL（IRQ_HANDLED）;
}


static?int?s3c64xx_buttons_open（struct?inode?*inode?struct?file?*file）
{
????int?i;
????int?err?=?0;
????
????for?（i?=?0;?i?	if?（button_irqs[i].irq?		continue;
	}
????????err?=?request_irq（button_irqs[i].irq?buttons_interrupt?IRQ_TYPE_EDGE_BOTH?
??????????????????????????button_irqs[i].name?（void?*）&button_irqs[i]）;
????????if?（err）
????????????break;
????}

????if?（err）?{
????????i--;
????????for?（;?i?>=?0;?i--）?{
	????if?（button_irqs[i].irq?		continue;
	????}
	????disable_irq（button_irqs[i].irq）;
????????????free_irq（button_irqs[i].irq?（void?*）&button_irqs[i]）;
????????}
????????return?-EBUSY;
????}

????ev_press?=?1;
????
????return?0;
}


static?int?s3c64xx_buttons_close（struct?inode?*inode?struct?file?*file）
{
????int?i;
????
????for?（i?=?0;?i?	if?（button_irqs[i].irq?	????continue;
	}
	free_irq（button_irqs[i].irq?（void?*）&button_irqs[i]）;
????}

????return?0;
}


static?int?s3c64xx_buttons_read（struct?file?*filp?char?__user?*buff?size_t?count?loff_t?*offp）
{
????unsigned?long?err;

????if?（!ev_press）?{
	if?（filp->f_flags?&?O_NONBLOCK）
	????return?-EAGAIN;
	else
	????wait_event_interruptible（button_waitq?ev_press）;
????}
????
????ev_press?=?0;

????err?=?copy_to_user（（void?*）buff?（const?void?*）（&key_values）?min（sizeof（key_values）?count））;

????return?err???-EFAULT?:?min（sizeof（key_values）?count）;
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????3925??2011-01-17?10:54??drivers\s3c6410_buttons.c

?????文件???????3866??2011-01-17?10:55??drivers\s3c6410_leds.c

?????文件???????3193??2011-01-17?10:53??drivers\s3c6410_pwm.c

????I..D...?????????0??2011-01-17?10:56??drivers

?????文件???????1242??2011-09-23?17:51??readme.txt

-----------?---------??----------?-----??----

????????????????12226????????????????????5