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#define MAX_FILE_LENGHT PAGE_SIZE
#define TYPE(dev) ( MINOR(dev) >> 4)
#define NUM(dev) ( MINOR(dev) & 0xf )
#define IRQ_NUM 1
#define DEV_NAME "keyboard"
#define MAX_DEV_COUNT 5
#define PORT_START 0xff30
int devno,err;
int mj,min;
struct cdev *mydev;
static char *devbuff;
struct dev_state{
int dev_open;
ssize_t dev_read;
ssize_t dev_write;
};
int mydev_ioctl(struct inode *in,struct file *filp,unsigned int ioctl,unsigned long param);
int mydev_open(struct inode *in,struct file* filp);
ssize_t mydev_read(struct file *filp,char *buff,ssize_t len,loff_t pos);
ssize_t mydev_write(struct file *filp, const char *buff, ssize_t len,loff_t pos);
loff_t mydev_llseek(struct file *filp,loff_t pos, int dist);
int mydev_close(struct inode *in , struct file *filp);
static struct dev_state STATE[MAX_DEV_COUNT+1];
struct resource *my_res;
struct file_operations fop_s={
.owner = THIS_MODULE,
.open = mydev_open,
.release = mydev_close,
.read = mydev_read,
.write = mydev_write,
.ioctl = mydev_ioctl,
.llseek = mydev_llseek,
};
static int module3_init(void){
mj=1;
min=1;
my_res->start=0xff30;
my_res->name="myres";
my_res->flags=IORESOURCE_IO | IORESOURCE_IO_FIXED;
my_res->parent=NULL;
my_res->sibling=NULL;
my_res->child=NULL;
struct resource *myres=request_region(200,300,"myreg");
devbuff=(char*)vmalloc(MAX_FILE_LENGHT);
memset(devbuff,0x20,sizeof(devbuff));
devno=MKDEV(mj,min);
mydev=cdev_alloc();
mydev->owner=THIS_MODULE;
cdev_init(mydev,&fop_s);
err=cdev_add(mydev,devno,1);
if(err){
printk(KERN_INFO"Invaid devno %d\n",devno);
return -EFAULT;
};
printk(KERN_INFO"Device"DEV_NAME"was created\n");
return 0;
};
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