#define IPC_RWBUF_SIZE    20           /* IPC Read buffer Size */
 #define IPC_IOC                  0x100         /* IPC command register IOC bit */
 
+#define PCI_DEVICE_ID_LINCROFT         0x082a
+#define PCI_DEVICE_ID_PENWELL          0x080e
+#define PCI_DEVICE_ID_CLOVERVIEW       0x08ea
+#define PCI_DEVICE_ID_TANGIER          0x11a0
+
 /* intel scu ipc driver data*/
 struct intel_scu_ipc_pdata_t {
        u32 ipc_base;
 
 static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
        {
-               PCI_VDEVICE(INTEL, 0x082a),
+               PCI_VDEVICE(INTEL, PCI_DEVICE_ID_LINCROFT),
                (kernel_ulong_t)&intel_scu_ipc_lincroft_pdata,
        }, {
-               PCI_VDEVICE(INTEL, 0x080e),
+               PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PENWELL),
                (kernel_ulong_t)&intel_scu_ipc_penwell_pdata,
        }, {
-               PCI_VDEVICE(INTEL, 0x08ea),
+               PCI_VDEVICE(INTEL, PCI_DEVICE_ID_CLOVERVIEW),
                (kernel_ulong_t)&intel_scu_ipc_penwell_pdata,
        }, {
-               PCI_VDEVICE(INTEL, 0x11a0),
+               PCI_VDEVICE(INTEL, PCI_DEVICE_ID_TANGIER),
                (kernel_ulong_t)&intel_scu_ipc_tangier_pdata,
        }, {
                0,