static int __init myhook_init(void)
{
unsigned char value;
value =0xff;
rt_i2c_read(0x50, 0x00, &value, 1);
prink("%d", value);
return 0;//nf_register_hook(&nfho);
}
static void globalmem_setup_cdev(struct globalmem_dev *dev, int index)
{
int err, devno = MKDEV(globalmem_major, index);
cdev_init(&dev->cdev, &globalmem_fops);
dev->cdev.owner = THIS_MODULE;
err = cdev_add(&dev->cdev, devno, 1);
if (err)
prink(KERN_NOTICE"ERROR %d adding globalmem %d", err, index);
}
static int globalmem_ioctl(struct inode *inodep, struct file *filp, unsigned int cmd, unsigned long arg)
{
struct globalmem_dev *dev = filp->private_data;
switch (cmd) {
case MEM_CLEAR:
memset(dev->mem, 0, GLOBALMEM_SIZE);
prink(KERN_INFO"globalmem is set to zero\n");
break;
default:
return -EINVAL;
break;
}
return 0;
}
static ssize_t globalmem_write(struct file *filp, char __user *buf, size_t size, loff_t *ppos)
{
unsigned long p = *ppos;
unsigned int count = size;
int ret = 0;
struct globalmem_dev *dev = filp->private_data;
if (p >= GLOBALMEM_SIZE)
return 0;
if (count > GLOBALMEM_SIZE)
count = GLOBAL_SIZE - p;
if (copy_from_user(buf, (void *)(dev->mem + p), count))
ret = -EFAULT;
else {
*ppos += count;
ret = count;
prink(KERN_INFO"write %u bytes(s) to %lu\n", count, p);
}
return ret;
}