драйвера pci нужна помощь

#ifndef __KERNEL__
#define __KERNEL__
#endif
#ifndef MODULE
#define MODULE
#endif
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define VENDOR_ID 0x2900
#define DEVICE_ID 0x0020
#define DEVICE_NAME "my_pci"

MODULE_AUTHOR("TURISHEV");
MODULE_LICENSE("GPL");
#define IRQ_NUM 11
static int major_number=0;
#define BUF_LEN 32
static volatile unsigned int Device_Open = 0;

static struct pci_dev *my_pci;
static struct pci_device_id mypci_ids[]={
{PCI_DEVICE(VENDOR_ID, DEVICE_ID),},
{0,},
};
static void __iomem *W4;
MODULE_DEVICE_TABLE(pci,mypci_ids);

int mypci_probe(struct pci_dev *my_pci, const struct pci_device_id *id)
{

int ret;

ret= pci_enable_device_mem(my_pci);
if (ret<0)
{
printk("fail %d \n", ret);
return ret;
}
printk("enedle\n");
ret=pci_request_regions(my_pci,"my_pci");
if (ret<0)
{
printk("fail %d \n", ret);
return ret;
}
printk("request");
printk("probe here \n");

printk("probe did somethink %d \n", ret);
W4 = (u32*)ioremap( pci_resource_start( my_pci, 0) & PCI_BASE_ADDRESS_MEM_MASK, pci_resource_len(my_pci, 0 ));
W4+=0x0014;
printk("W4 = 0x%08X",W4);
return 0;
}

void mypci_remove(struct pci_dev *dev)
{
pci_release_regions(dev);
printk("remove pci \n");
pci_disable_device(dev);
}

static int mypci_open(struct inode *inode, struct file *file)
{
if (Device_Open){
printk("fail open");
return -EBUSY;}
Device_Open++;
try_module_get(THIS_MODULE);
printk("device opened!!! \n");

return 0;
}

static int mypci_release(struct inode *inode, struct file *file)
{
Device_Open--;
module_put(THIS_MODULE);
printk("pci release \n");
return 0;
}

static ssize_t mypci_read(struct file *filp, char *buffer, size_t length, loff_t *offset){

copy_to_user(buffer,W4,length);
printk("read 0x%08X %d", buffer,length);
return length;
}

static ssize_t mypci_write(struct file *file, const char *buffer, size_t length, loff_t *offset)
{

copy_from_user(W4, buffer, length);

return length;
}
struct file_operations mypci_fops={
.owner=THIS_MODULE,
.read=mypci_read,
.write= mypci_write,
.open=mypci_open,
.release=mypci_release
};

static struct pci_driver driver={
.name="my_pci",
.id_table=mypci_ids,
.probe=mypci_probe,
.remove=mypci_remove,
};

static int __init mypci_init(void){

int ret_val;

my_pci = pci_get_device(VENDOR_ID, DEVICE_ID , NULL);
ret_val = register_chrdev(major_number, DEVICE_NAME, &mypci_fops);
major_number = ret_val;

printk(" init success\n");
return pci_register_driver(&driver);
}

static void __exit mypci_exit(void){

pci_unregister_driver(&driver);
unregister_chrdev(major_number, DEVICE_NAME);
pci_dev_put(my_pci);
printk("exit dev \n");
}

module_init(mypci_init);
module_exit(mypci_exit);