ESB_LOCK_REG
pci_write_config_byte(edev->pdev, ESB_LOCK_REG, val);
pci_write_config_byte(edev->pdev, ESB_LOCK_REG, 0x0);
pci_read_config_byte(edev->pdev, ESB_LOCK_REG, &val);
pci_read_config_byte(edev->pdev, ESB_LOCK_REG, &val1);
pci_write_config_byte(edev->pdev, ESB_LOCK_REG, 0x00);