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authorJonas Peterson <jonas.peterson@gmail.com>2013-05-07 22:05:23 +0200
committerMarc Kleine-Budde <mkl@pengutronix.de>2013-06-03 14:02:56 +0200
commita90f13b24fb40d02d11496cce6a10ae8d4b319b2 (patch)
tree76c21e9eed1dbea3db89eedf6652cd44da7afe91 /drivers/net/can/usb
parent01cb71d2d47b78354358e4bb938bb06323e17498 (diff)
downloadblackbird-op-linux-a90f13b24fb40d02d11496cce6a10ae8d4b319b2.tar.gz
blackbird-op-linux-a90f13b24fb40d02d11496cce6a10ae8d4b319b2.zip
net: can: kvaser_usb: fix reception on "USBcan Pro" and "USBcan R" type hardware.
Unlike Kvaser Leaf light devices, some other Kvaser devices (like USBcan Pro, USBcan R) receive CAN messages in CMD_LOG_MESSAGE frames. This patch adds support for it. Cc: linux-stable <stable@vger.kernel.org> # >= v3.8 Signed-off-by: Jonas Peterson <jonas.peterson@gmail.com> Signed-off-by: Olivier Sobrie <olivier@sobrie.be> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/usb')
-rw-r--r--drivers/net/can/usb/kvaser_usb.c64
1 files changed, 43 insertions, 21 deletions
diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c
index 45cb9f3c1324..3b9546588240 100644
--- a/drivers/net/can/usb/kvaser_usb.c
+++ b/drivers/net/can/usb/kvaser_usb.c
@@ -136,6 +136,9 @@
#define KVASER_CTRL_MODE_SELFRECEPTION 3
#define KVASER_CTRL_MODE_OFF 4
+/* log message */
+#define KVASER_EXTENDED_FRAME BIT(31)
+
struct kvaser_msg_simple {
u8 tid;
u8 channel;
@@ -817,8 +820,13 @@ static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev,
priv = dev->nets[channel];
stats = &priv->netdev->stats;
- if (msg->u.rx_can.flag & (MSG_FLAG_ERROR_FRAME | MSG_FLAG_NERR |
- MSG_FLAG_OVERRUN)) {
+ if ((msg->u.rx_can.flag & MSG_FLAG_ERROR_FRAME) &&
+ (msg->id == CMD_LOG_MESSAGE)) {
+ kvaser_usb_rx_error(dev, msg);
+ return;
+ } else if (msg->u.rx_can.flag & (MSG_FLAG_ERROR_FRAME |
+ MSG_FLAG_NERR |
+ MSG_FLAG_OVERRUN)) {
kvaser_usb_rx_can_err(priv, msg);
return;
} else if (msg->u.rx_can.flag & ~MSG_FLAG_REMOTE_FRAME) {
@@ -834,22 +842,40 @@ static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev,
return;
}
- cf->can_id = ((msg->u.rx_can.msg[0] & 0x1f) << 6) |
- (msg->u.rx_can.msg[1] & 0x3f);
- cf->can_dlc = get_can_dlc(msg->u.rx_can.msg[5]);
+ if (msg->id == CMD_LOG_MESSAGE) {
+ cf->can_id = le32_to_cpu(msg->u.log_message.id);
+ if (cf->can_id & KVASER_EXTENDED_FRAME)
+ cf->can_id &= CAN_EFF_MASK | CAN_EFF_FLAG;
+ else
+ cf->can_id &= CAN_SFF_MASK;
- if (msg->id == CMD_RX_EXT_MESSAGE) {
- cf->can_id <<= 18;
- cf->can_id |= ((msg->u.rx_can.msg[2] & 0x0f) << 14) |
- ((msg->u.rx_can.msg[3] & 0xff) << 6) |
- (msg->u.rx_can.msg[4] & 0x3f);
- cf->can_id |= CAN_EFF_FLAG;
- }
+ cf->can_dlc = get_can_dlc(msg->u.log_message.dlc);
- if (msg->u.rx_can.flag & MSG_FLAG_REMOTE_FRAME)
- cf->can_id |= CAN_RTR_FLAG;
- else
- memcpy(cf->data, &msg->u.rx_can.msg[6], cf->can_dlc);
+ if (msg->u.log_message.flags & MSG_FLAG_REMOTE_FRAME)
+ cf->can_id |= CAN_RTR_FLAG;
+ else
+ memcpy(cf->data, &msg->u.log_message.data,
+ cf->can_dlc);
+ } else {
+ cf->can_id = ((msg->u.rx_can.msg[0] & 0x1f) << 6) |
+ (msg->u.rx_can.msg[1] & 0x3f);
+
+ if (msg->id == CMD_RX_EXT_MESSAGE) {
+ cf->can_id <<= 18;
+ cf->can_id |= ((msg->u.rx_can.msg[2] & 0x0f) << 14) |
+ ((msg->u.rx_can.msg[3] & 0xff) << 6) |
+ (msg->u.rx_can.msg[4] & 0x3f);
+ cf->can_id |= CAN_EFF_FLAG;
+ }
+
+ cf->can_dlc = get_can_dlc(msg->u.rx_can.msg[5]);
+
+ if (msg->u.rx_can.flag & MSG_FLAG_REMOTE_FRAME)
+ cf->can_id |= CAN_RTR_FLAG;
+ else
+ memcpy(cf->data, &msg->u.rx_can.msg[6],
+ cf->can_dlc);
+ }
netif_rx(skb);
@@ -911,6 +937,7 @@ static void kvaser_usb_handle_message(const struct kvaser_usb *dev,
case CMD_RX_STD_MESSAGE:
case CMD_RX_EXT_MESSAGE:
+ case CMD_LOG_MESSAGE:
kvaser_usb_rx_can_msg(dev, msg);
break;
@@ -919,11 +946,6 @@ static void kvaser_usb_handle_message(const struct kvaser_usb *dev,
kvaser_usb_rx_error(dev, msg);
break;
- case CMD_LOG_MESSAGE:
- if (msg->u.log_message.flags & MSG_FLAG_ERROR_FRAME)
- kvaser_usb_rx_error(dev, msg);
- break;
-
case CMD_TX_ACKNOWLEDGE:
kvaser_usb_tx_acknowledge(dev, msg);
break;
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