irq.c

linux2.6驱动模块

#include <asm/irq.h>
#include <asm/arch-s3c2410/irqs.h>
#include "../inc/inc.h"

extern MANAGER *Mg_p;

static DECLARE_WAIT_QUEUE_HEAD(keys_waitq);
static volatile int env_keys = 0;

int Liid_keys_read(void *vptr, void *arg)
{
    unsigned long err;
    int i;
    wait_event_interruptible(keys_waitq, env_keys);
    env_keys = 0;
    for(i = 0; i < 4 ; i ++){
        printk("%x ", Mg_p->press_cnt[i]);
    }
    printk("\n");

}

irqreturn_t Liid_interrupts_hand(int irq, void *dev_id, struct pt_regs *regs){
    volatile int *cnt = (volatile int *)dev_id; 
    *cnt = *cnt + 1;
    switch(irq){
        case IRQ_EINT0:
            printk("~");
            break;
        case IRQ_EINT2:
            printk("!");
            break;
        case IRQ_EINT11:
            printk("@");
            break;
        case IRQ_EINT19:
            printk("#");
            break;
        default:
            printk("|_|");
            break;

    }
    env_keys = 1;
    wake_up_interruptible(&keys_waitq);
    //printk("keys--->%d:%#x \n", irq, *cnt);
    return 0;
}


int Liid_init_irq(void *vptr, void *arg){
        int error, i;        
        for(i = 0; i < 4; i++){
            error = request_irq(Mg_p->key_irqs[i]->irq_num, Liid_interrupts_hand, Mg_p->key_irqs[i]->flags, Mg_p->key_irqs[i]->name, (void *)(&(Mg_p->press_cnt[i])));
            if(error){
                printk("request irq(%d) error:%d\r\n", i, error);
                break;
            }
        }
        if(error){
        
        }
}

int Liid_rm_irq(void *vptr, void *arg){
        int  i;
        for(i = 0; i < 4; i++){
            free_irq(Mg_p->key_irqs[i]->irq_num, (void *)(&(Mg_p->press_cnt[i])));
        }

}