net/can/mscan: replace hardcoded values with defines

[net-next-2.6.git] / drivers / net / can / mscan / mscan.c

diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c
index 20d1991b90948853e811338a41424435667dd6ec..263d1a9f0880ed8496c8cbde511367172ec29a83 100644 (file)
--- a/drivers/net/can/mscan/mscan.c
+++ b/drivers/net/can/mscan/mscan.c
@@ -211,18 +211,23 @@ static netdev_tx_t mscan_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
        rtr = frame->can_id & CAN_RTR_FLAG;
 
+       /* RTR is always the lowest bit of interest, then IDs follow */
        if (frame->can_id & CAN_EFF_FLAG) {
-               can_id = (frame->can_id & CAN_EFF_MASK) << 1;
+               can_id = (frame->can_id & CAN_EFF_MASK)
+                        << (MSCAN_EFF_RTR_SHIFT + 1);
                if (rtr)
-                       can_id |= 1;
+                       can_id |= 1 << MSCAN_EFF_RTR_SHIFT;
                out_be16(&regs->tx.idr3_2, can_id);
 
                can_id >>= 16;
-               can_id = (can_id & 0x7) | ((can_id << 2) & 0xffe0) | (3 << 3);
+               /* EFF_FLAGS are inbetween the IDs :( */
+               can_id = (can_id & 0x7) | ((can_id << 2) & 0xffe0)
+                        | MSCAN_EFF_FLAGS;
        } else {
-               can_id = (frame->can_id & CAN_SFF_MASK) << 5;
+               can_id = (frame->can_id & CAN_SFF_MASK)
+                        << (MSCAN_SFF_RTR_SHIFT + 1);
                if (rtr)
-                       can_id |= 1 << 4;
+                       can_id |= 1 << MSCAN_SFF_RTR_SHIFT;
        }
        out_be16(&regs->tx.idr1_0, can_id);