diff -r 0e207abed88a -r 23b360e4a530 master/fsm_coe.c
--- a/master/fsm_coe.c	Wed Nov 05 15:06:54 2014 +0100
+++ b/master/fsm_coe.c	Wed Nov 05 18:42:12 2014 +0100
@@ -318,7 +318,8 @@
         )
 {
     ec_slave_t *slave = fsm->slave;
-    uint8_t *data = ec_slave_mbox_prepare_send(slave, datagram, 0x03, 8);
+    uint8_t *data = ec_slave_mbox_prepare_send(slave, datagram,
+			EC_MBOX_TYPE_COE, 8);
     if (IS_ERR(data)) {
         return PTR_ERR(data);
     }
@@ -470,7 +471,8 @@
         )
 {
     ec_slave_t *slave = fsm->slave;
-    u8 *data = ec_slave_mbox_prepare_send(slave, datagram, 0x03, 8);
+    u8 *data = ec_slave_mbox_prepare_send(slave, datagram, EC_MBOX_TYPE_COE,
+			8);
     if (IS_ERR(data)) {
         return PTR_ERR(data);
     }
@@ -532,7 +534,7 @@
         return;
     }
 
-    if (mbox_prot != 0x03) { // CoE
+    if (mbox_prot != EC_MBOX_TYPE_COE) {
         EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
                 mbox_prot);
         fsm->state = ec_fsm_coe_error;
@@ -752,7 +754,8 @@
         )
 {
     ec_slave_t *slave = fsm->slave;
-    u8 *data = ec_slave_mbox_prepare_send(slave, datagram, 0x03, 10);
+    u8 *data = ec_slave_mbox_prepare_send(slave, datagram, EC_MBOX_TYPE_COE,
+			10);
     if (IS_ERR(data)) {
         return PTR_ERR(data);
     }
@@ -813,7 +816,7 @@
         return;
     }
 
-    if (mbox_prot != 0x03) { // CoE
+    if (mbox_prot != EC_MBOX_TYPE_COE) {
         EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
                 mbox_prot);
         fsm->state = ec_fsm_coe_error;
@@ -1049,7 +1052,7 @@
         return;
     }
 
-    if (mbox_prot != 0x03) { // CoE
+    if (mbox_prot != EC_MBOX_TYPE_COE) {
         EC_SLAVE_ERR(slave, "Received mailbox protocol"
                 " 0x%02X as response.\n", mbox_prot);
         fsm->state = ec_fsm_coe_error;
@@ -1200,7 +1203,7 @@
     uint8_t data_set_size;
 
     if (request->data_size <= 4) { // use expedited transfer type
-        data = ec_slave_mbox_prepare_send(slave, datagram, 0x03,
+        data = ec_slave_mbox_prepare_send(slave, datagram, EC_MBOX_TYPE_COE,
                 EC_COE_DOWN_REQ_HEADER_SIZE);
         if (IS_ERR(data)) {
             request->errno = PTR_ERR(data);
@@ -1241,7 +1244,7 @@
             data_size = required_data_size;
         }
 
-        data = ec_slave_mbox_prepare_send(slave, datagram, 0x03,
+        data = ec_slave_mbox_prepare_send(slave, datagram, EC_MBOX_TYPE_COE,
                 data_size);
         if (IS_ERR(data)) {
             request->errno = PTR_ERR(data);
@@ -1491,7 +1494,7 @@
             + EC_COE_DOWN_SEG_MIN_DATA_SIZE;
     }
 
-    data = ec_slave_mbox_prepare_send(slave, datagram, 0x03,
+    data = ec_slave_mbox_prepare_send(slave, datagram, EC_MBOX_TYPE_COE,
             data_size);
     if (IS_ERR(data)) {
         request->errno = PTR_ERR(data);
@@ -1565,7 +1568,7 @@
         return;
     }
 
-    if (mbox_prot != 0x03) { // CoE
+    if (mbox_prot != EC_MBOX_TYPE_COE) {
         request->errno = EIO;
         fsm->state = ec_fsm_coe_error;
         EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
@@ -1743,7 +1746,7 @@
         return;
     }
 
-    if (mbox_prot != 0x03) { // CoE
+    if (mbox_prot != EC_MBOX_TYPE_COE) {
         request->errno = EIO;
         fsm->state = ec_fsm_coe_error;
         EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
@@ -1844,7 +1847,8 @@
     ec_sdo_request_t *request = fsm->request;
     ec_master_t *master = slave->master;
 
-    u8 *data = ec_slave_mbox_prepare_send(slave, datagram, 0x03, 10);
+    u8 *data = ec_slave_mbox_prepare_send(slave, datagram, EC_MBOX_TYPE_COE,
+			10);
     if (IS_ERR(data)) {
         request->errno = PTR_ERR(data);
         return PTR_ERR(data);
@@ -2035,7 +2039,8 @@
         )
 {
     uint8_t *data =
-        ec_slave_mbox_prepare_send(fsm->slave, datagram, 0x03, 10);
+        ec_slave_mbox_prepare_send(fsm->slave, datagram, EC_MBOX_TYPE_COE,
+				10);
     if (IS_ERR(data)) {
         fsm->request->errno = PTR_ERR(data);
         fsm->state = ec_fsm_coe_error;
@@ -2108,7 +2113,7 @@
         ec_print_data(data, rec_size);
     }
 
-    if (mbox_prot != 0x03) { // CoE
+    if (mbox_prot != EC_MBOX_TYPE_COE) {
         request->errno = EIO;
         fsm->state = ec_fsm_coe_error;
         EC_SLAVE_WARN(slave, "Received mailbox protocol 0x%02X"
@@ -2413,7 +2418,7 @@
         ec_print_data(data, rec_size);
     }
 
-    if (mbox_prot != 0x03) { // CoE
+    if (mbox_prot != EC_MBOX_TYPE_COE) {
         EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
                 mbox_prot);
         request->errno = EIO;