From 74ff60b29ec602322178d32cb2a82b24ddb884fc Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Mon, 16 Nov 2009 12:57:52 +0000 Subject: [PATCH] net/can/mscan: replace hardcoded values with defines Not all hardcoded values have been replaced as this made the code quite unreadable. IMHO this compromise serves the purpose of readability. Signed-off-by: Wolfram Sang Signed-off-by: David S. Miller --- drivers/net/can/mscan/mscan.c | 15 ++++++++++----- drivers/net/can/mscan/mscan.h | 5 +++++ 2 files changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c index 20d1991b909..263d1a9f088 100644 --- 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(®s->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(®s->tx.idr1_0, can_id); diff --git a/drivers/net/can/mscan/mscan.h b/drivers/net/can/mscan/mscan.h index 20180007fe3..00fc4aaf1ed 100644 --- a/drivers/net/can/mscan/mscan.h +++ b/drivers/net/can/mscan/mscan.h @@ -131,6 +131,11 @@ /* MSCAN Miscellaneous Register (CANMISC) bits */ #define MSCAN_BOHOLD 0x01 +/* MSCAN Identifier Register (IDR) bits */ +#define MSCAN_SFF_RTR_SHIFT 4 +#define MSCAN_EFF_RTR_SHIFT 0 +#define MSCAN_EFF_FLAGS 0x18 /* IDE + SRR */ + #ifdef MSCAN_FOR_MPC5200 #define _MSCAN_RESERVED_(n, num) u8 _res##n[num] #define _MSCAN_RESERVED_DSR_SIZE 2