static ssize_t pport_write(struct file *filp, char *buf, size_t count, loff_t *f_pos)
{
if(count < MAXSIZE) {
copy_from_user(d_buf, buf, count);
d_buf[count] = 0;
printlcd(d_buf);
*f_pos += count;
return count;
} else {
copy_from_user(d_buf, buf, MAXSIZE - 1);
d_buf[MAXSIZE - 1] = 0;
printlcd(d_buf);
*f_pos += MAXSIZE - 1;
return MAXSIZE - 1;
}
}
void SHOW_LINES()
{
INTERRUPTS_OFF
gotolcd(0); // Set Cursor Line-1
strcpy(lcdbuf,LINE_1);
printlcd();
gotolcd(0x40); // Set Cursor Line-2
strcpy(lcdbuf,LINE_2);
printlcd();
INTERRUPTS_ON
}
void cleanup_module(void)
{
printk(KERN_ALERT "pport module is going to terminate\n");
printlcd("DRIVER REMOVED ");
unregister_chrdev(major, "registered_pport_61");
clear();
}
int init_module(void)
{
int a;
a = register_chrdev(major, "registered_pport_61", &fops);
if(a < 0) {
printk(KERN_ALERT "error: can't register major number %d\n", major);
return a;
}
port = check_region(0x378, 1);
if(port) printk(KERN_ALERT "pport cannot reserve 0x378\n");
request_region(0x378, 1, "registered_pport_61");
//lcd setup//
outb(0, 0x378);
udelay(10000);
lcd_init();
udelay(10000);
printlcd("DRIVER INSERTED ");
return 0;
}
