1 #include <linux/module.h>
  2 #include <linux/init.h>
  3 #include <linux/fs.h>
  4 #include <linux/interrupt.h>
  5 #include <linux/irq.h>
  6 #include <linux/sched.h>
  7 #include <linux/pm.h>
  8 #include <linux/sysctl.h>
  9 #include <linux/proc_fs.h>
 10 #include <linux/delay.h>
 11 #include <linux/input.h>
 12
 13 #include <mach/hardware.h>
 14 #include <mach/regs-gpio.h>
 15
 16 struct pin_desc
 17 {
 18     int irq;
 19     char *name;
 20     unsigned int pin;
 21     unsigned int key_val;
 22 };
 23
 24 static struct pin_desc pins_desc[4] =
 25 {
 26     {IRQ_EINT1, "S1", S3C2410_GPF1, KEY_L},
 27     {IRQ_EINT4, "S2", S3C2410_GPF4, KEY_S},
 28     {IRQ_EINT2, "S3", S3C2410_GPF2, KEY_ENTER},
 29     {IRQ_EINT0, "S4", S3C2410_GPF0, KEY_LEFTSHIFT},
 30 };
 31
 32 static struct pin_desc *irq_pd;
 33 static struct timer_list timer;
 34 static struct input_dev *seventh_dev;
 35
 36 static irqreturn_t buttons_irq(int irq, void *dev_id)
 37 {
 38     irq_pd = (struct pin_desc *)dev_id;
 39     mod_timer(&timer, jiffies+HZ/100);
 40
 41     return IRQ_RETVAL(IRQ_HANDLED);
 42 }
 43
 44
 45
 46 static void timer_fuction(unsigned long data)
 47 {
 48
 49     struct pin_desc *pin = irq_pd;
 50     unsigned int pinval;
 51
 52     if (!pin)
 53         return;
 54
 55     pinval = s3c2410_gpio_getpin(pin->pin);
 56
 57     if (pinval)
 58     {
 59         //松开,最后一个参数:0-松开,1-按下
 60         input_event(seventh_dev, EV_KEY, pin->key_val, 0);
 61         input_sync(seventh_dev);
 62     }
 63     else
 64     {
 65         //按下
 66         input_event(seventh_dev, EV_KEY, pin->key_val, 1);
 67         input_sync(seventh_dev);
 68     }
 69 }
 70
 71 int seventh_init()
 72 {
 73     int i;
 74     /*1. 分配一个input_device结构体*/
 75     seventh_dev = input_allocate_device();
 76
 77     /*2. 设置*/
 78     /*2.1 能产生哪类事件*/
 79     set_bit(EV_KEY, seventh_dev->evbit);
 80     set_bit(EV_KEY, seventh_dev->evbit);//能产生重复类事件
 81     /*2.2 能产生这类操作里的哪些事件:L,S,ENTER,LEFTSHIFT*/
 82     set_bit(KEY_L, seventh_dev->keybit);
 83     set_bit(KEY_S, seventh_dev->keybit);
 84     set_bit(KEY_ENTER, seventh_dev->keybit);
 85     set_bit(KEY_LEFTSHIFT, seventh_dev->keybit);
 86
 87     /*3. 注册*/
 88     input_register_device(seventh_dev);
 89
 90     /*4. 硬件相关操作*/
 91     init_timer(&timer);
 92     timer.function = timer_fuction;
 93     add_timer(&timer);
 94     for (i = 0; i < 4; i++)
 95     {
 96         request_irq(pins_desc[i].irq, buttons_irq, IRQ_TYPE_EDGE_BOTH, pins_desc[i].name, &pins_desc[i]);
 97     }
 98     return 0;
 99 }
100 static void seventh_exit()
101 {
102     int i;
103     for (i = 0; i < 4; i++)
104     {
105         free_irq(pins_desc[i].irq, &pins_desc[i]);
106     }
107     del_timer(&timer);
108     input_unregister_device(seventh_dev);
109     input_free_device(seventh_dev);
110 }
111
112 module_init(seventh_init);
113 module_exit(seventh_exit);
114
115 MODULE_LICENSE("GPL");  

1 struct input_event {
2 struct timeval time;
3 __u16 type;
4 __u16 code;
5 __s32 value;
6 };