刷卡器wiegand格式数据输出问题 hi3521_问答

刷卡器数据线接到3521的GPIO7_6（DATA0）和GPIO7_7（DATA1），先设置了这两个口为通用gpio口且设置为输入，看数据手册显示整个GPIO7的中断号为112，下面是wiegand驱动程序.
#include
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#include
#include
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//#include
//#include

#include
#include

#define WIEGAND_MAJOR 244

//delay 33ms to convert data
#define TIMER_DELAY HZ/30

#define DEVICE_NAME  "wiegand"

bool TIMEER_FLAG = false;
bool RF_OPEN_FLAG = false;

struct wiegand_irq_desc{
int irq;
int pin;
int number;
char *name;
  };

  static struct wiegand_irq_desc wiegand_irqs[]={

  {112,6,1,"wiegand_data0"},{112,7,2,"wiegand_data1"},
};

struct wiegand_dev
{

      char wiegand[26]; //Wiegand Data 26Bits
int hid;
int pid;
//unsigned char state;
int count; //Global Counter
struct cdev cdev;
struct semaphore sem;
struct completion receive_completion;
struct timer_list wiegand_timer;
      struct  wiegand_irq_desc wiegand_irqs[2];

};

static struct wiegand_dev *rf_card;

  static volatile unsigned long *gpio7_6_dat = NULL;
  static volatile unsigned long *gpio7_6_reg = NULL;
  static volatile unsigned long *gpio7_7_dat = NULL;
  static volatile unsigned long *gpio7_7_reg = NULL;
  static struct class *wiegand_class = NULL;

  static volatile unsigned long *gpio7_dir = NULL;
  //static volatile unsigned long *gpio7_ie = NULL;

//应该除了初始化外，只能有这一个地方能够将rf_card->count置为0，其余地方置为0皆不合法
static char convert_data(void)
{
int i;
      int even;
      int  odd;
even = 0;
for(i = 1; i < 13;i++)
{
     if(rf_card->wiegand == 1)
      even = (~even) & 0x01;
}
     if(even != rf_card->wiegand[0])
        {
rf_card->count = 0;
goto error;
      }

      odd = 1;
for(i = 13; i< 25;i++)
{
      if(rf_card->wiegand == 1)
odd = (~odd)& 0x01;
     }
     if(odd != rf_card->wiegand[25])
      {
rf_card->count = 0;
         goto error;
        }

//奇偶校验通过
rf_card->hid = 0;
for(i = 1 ;i<=12;i++)//hid转换
rf_card->hid =  rf_card->hid << 1 |rf_card->wiegand;

rf_card->pid = 0;
for(i = 13 ;i<=25;i++)//pid转换
rf_card->pid =  rf_card->pid << 1 |rf_card->wiegand;

rf_card->count = 0;
return 0;

error:
printk("Parity Efficacy Error!\n");
return -1;
}

static void wiegand_do_timer(unsigned long arg)
{
printk("%s:wait wieg_data completed\n",__func__);
wait_for_completion(&(rf_card->receive_completion));//等待维根数据传送完毕才进行转换

disable_irq(112);
disable_irq(112);//防止wieg_data在转换期间发生变化

convert_data();
up(&rf_card->sem);

printk("%s:complete convert wieg_data,hid = %d,pid = %d \n",__func__,rf_card->hid,rf_card->pid);

TIMEER_FLAG = false;

enable_irq(112);
enable_irq(112);
}

static void enable_irqs(void)
{
enable_irq(112);
enable_irq(112);

printk("%s:the irq is setup!\n",__func__);
}

static irqreturn_t wiegand_irq0(int irq, void *dev_id)
{
disable_irq_nosync(112);
printk("%s:IN\n",__func__);
udelay(5);

if(*gpio7_6_dat== 0)
{
   rf_card->wiegand[rf_card->count] = 0;
   printk("%s:wiegand[%d] = %d\n",__func__,rf_card->count,rf_card->wiegand[rf_card->count]);
rf_card->count ++;
udelay(300);
}
else
goto end;


   // (*gpio7_ie)|=(0x3<<6);
enable_irq(112);

if(rf_card->count == 1)
init_completion(&(rf_card->receive_completion));
else if(rf_card->count == 26)
complete(&(rf_card->receive_completion));

   if(TIMEER_FLAG == false)
   {
rf_card->wiegand_timer.expires = jiffies + TIMER_DELAY;
add_timer(&rf_card->wiegand_timer);
TIMEER_FLAG = true;
printk("%s:add_timer\n",__func__);
}

printk("%s:OUT\n",__func__);
return IRQ_HANDLED;
end:
printk("%s:error data\n",__func__);
enable_irq(112);
return IRQ_HANDLED;
}

static irqreturn_t wiegand_irq1(int irq, void *dev_id)
{
disable_irq_nosync(112);//必须用这个函数       printk("%s:IN\n",__func__);

udelay(5);

if(*gpio7_7_dat == 1 && rf_card->count < 26)
{
   rf_card->wiegand[rf_card->count] = 1;
printk("%s:wiegand[%d] = %d\n",__func__,rf_card->count,rf_card->wiegand[rf_card->count]);
rf_card->count ++;
udelay(300);
}
else
goto end;

enable_irq(112);

//rf_card->count经过上面“++”之后都会大1
if(rf_card->count == 1)
init_completion(&(rf_card->receive_completion));
else if(rf_card->count == 26)
complete(&(rf_card->receive_completion));//只能在此处complete

   if(TIMEER_FLAG== false)
       {
rf_card->wiegand_timer.expires = jiffies + TIMER_DELAY;
add_timer(&rf_card->wiegand_timer);
TIMEER_FLAG = true;
printk("%s:add_timer\n",__func__);
}

printk("%s:OUT\n",__func__);

return IRQ_HANDLED;
end:
printk("%s:error data\n",__func__);
enable_irq(112);
return IRQ_HANDLED;
}

static ssize_t rfcd_read(struct file *filp, char __user *buf, size_t size, loff_t *ppos)
{

      printk("in kernel 1 read\n");
down_interruptible(&rf_card->sem);

      printk("in kernel 2 read\n");

if(size <= rf_card->count)
size = rf_card->count;

return copy_to_user(buf,rf_card->wiegand, size);
}

static ssize_t rfcd_write(struct file *filp, const char __user *buf, size_t size, loff_t *ppos)
{
return 0;
}

static int request_irqs(void)
   {
   int ret;

printk("%s:start request irqs\n",__func__);

if(ret = request_irq(112,wiegand_irq0,IRQF_SHARED,"wiegand_data0",rf_card))
{
printk("%s:request 112:%d,ret:%d failed!\n",__func__,112,ret);
return -1;
}

if(ret = request_irq(112,wiegand_irq1,IRQF_SHARED,"wiegand_data1",rf_card))
{
printk("%s:request 112:%d,ret:%d failed!\n",__func__,112,ret);
return -1;
}

printk("%s:request irqs success!\n",__func__);
return 0;
}

static int rfcd_open(struct inode *inode, struct file *filp)
{
   if(RF_OPEN_FLAG)
return -EBUSY;//Don't open again!

RF_OPEN_FLAG = true;
TIMEER_FLAG = false;

      *gpio7_6_reg &= ~0x1; //通用GPIO
      *gpio7_7_reg &= ~0x1;
      *gpio7_dir &= 0x00<<6; //6.7为输入
  //    (*gpio7_ie)|=(0x3<<6);

setup_timer(&rf_card->wiegand_timer,wiegand_do_timer,0);

memset(rf_card->wiegand,0x00,26);
rf_card->count = 0;

enable_irqs();

printk("%s: the device have been open\n",__func__);
return 0;
}

static void free_irqs(void)
{
free_irq(112,rf_card);
free_irq(112,rf_card);
}

int rfcd_release(struct inode *inode, struct file *filp)
{
disable_irq(112);
disable_irq(112);

RF_OPEN_FLAG = false;

del_timer_sync(&rf_card->wiegand_timer);
return 0;
}

static struct file_operations rfcd_fops =
{
.owner = THIS_MODULE,
.read = rfcd_read,
.write = rfcd_write,
.open = rfcd_open,
.release = rfcd_release,
};

static int __init wiegand_init(void)
{
int err,result;
dev_t devno = MKDEV(WIEGAND_MAJOR, 0);

if(WIEGAND_MAJOR)
result = register_chrdev_region(devno,1,DEVICE_NAME);
else
result = alloc_chrdev_region(&devno,0,1,DEVICE_NAME);

if(result < 0)
{
printk("%s:register_chrdev_region error\n",__func__);
return result;
}

rf_card = kmalloc(sizeof(struct wiegand_dev),GFP_KERNEL);
if (!rf_card)
{
result = -ENOMEM;
goto fail_malloc;
}

memset(rf_card,0,sizeof(struct wiegand_dev));

rf_card->count = 0;

cdev_init(&(rf_card->cdev), &rfcd_fops);

rf_card->cdev.owner = THIS_MODULE;

err = cdev_add(&rf_card->cdev, devno, 1);

if(err)
{
printk("adding err\r\n");
unregister_chrdev_region(devno,1);
kfree(rf_card);
free_irqs();
return err;
}



      wiegand_class = class_create(THIS_MODULE,"wiegand_class");
      device_create(wiegand_class,NULL,MKDEV(WIEGAND_MAJOR,0),NULL,"wiegand");

init_completion(&(rf_card->receive_completion));
//init_MUTEX_LOCKED(&rf_card->sem);
      sema_init(&rf_card->sem,0);

//s3c_gpio_setpull(S3C64XX_GPL(9), S3C_GPIO_PULL_UP);
//s3c_gpio_setpull(S3C64XX_GPL(10), S3C_GPIO_PULL_UP);

result = request_irqs();

if(result < 0)
{
printk("%s:request_irqs error\n",__func__);
return result;
}

disable_irq(112);
disable_irq(112);



      gpio7_6_reg = ioremap(0x200f0000+0x0120,4);
      gpio7_7_reg = ioremap(0x200f0000+0x0124,4);
gpio7_dir = ioremap(0x201c0000+0x0400,4);
//    gpio7_ie = ioremap(0x201c0000+0x0410,4);
gpio7_6_dat = ioremap(0x201c0000+0x0100,4);
      gpio7_7_dat = ioremap(0x201c0000+0x0200,4);

printk ("\n@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
printk (DEVICE_NAME"\tinitialized\n");
printk ("\n@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
return 0;

fail_malloc:
unregister_chrdev_region(devno,1);

return result;
}

static void __exit wiegand_exit(void)
{
cdev_del(&rf_card->cdev);
kfree(rf_card);
free_irqs();
unregister_chrdev_region(MKDEV(WIEGAND_MAJOR,0),1);
printk ("\n@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
printk (DEVICE_NAME"\tremoved\n");
printk ("\n@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
}

module_init(wiegand_init);
module_exit(wiegand_exit);

MODULE_AUTHOR("Changsheng.Guo,[email]gcshy@126.com[/email]");
MODULE_LICENSE("GPL");

但是最后在开发板上运行测试程序时，刷卡后，既未接收到0信号，也没收到1信号，不知道问题出在哪里，求大神指导

补充内容 (2014-12-8 16:12):
之后把GPIO7_7改成GPIO7_6，中断号为107，避开两个中断号都为一样，下面寄存器配置gpio7-6都改成gpio2-7，之前卸载驱动时忘了解除映射，都加上，最后测试时发现还是未能进入中断，也就是刷卡后，没有数据通过gpio7-6和gpio2-7，不知道为什么？

刷卡器wiegand格式数据输出问题 hi3521

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