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| author |   Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com> | 2019-08-12 15:36:44 +0530 |
|---|---|---|
| committer |   Marc Kleine-Budde <mkl@pengutronix.de> | 2019-08-13 17:31:26 +0200 |
| commit | e6997dd2688403bf8f760bd9fd7ddb5c654bc8bd (patch) | |
| tree | 0ea96654647b0d51d408e9e164cacfe67f579d52 /drivers/net/can | |
| parent | can: xilinx_can: xcanfd_rx(): fix FSR register handling in the RX path (diff) | |
| download | linux-dev-e6997dd2688403bf8f760bd9fd7ddb5c654bc8bd.tar.xz linux-dev-e6997dd2688403bf8f760bd9fd7ddb5c654bc8bd.zip | |
can: xilinx_can: fix the data update logic for CANFD FD frames
commit c223da689324 ("can: xilinx_can: Add support for CANFD FD frames")
is writing data to a wrong offset for FD frames.
This patch fixes this issue.
Fixes: c223da6 ("can: xilinx_can: Add support for CANFD FD frames")
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Reviewed-by: Shubhrajyoti Datta <Shubhrajyoti.datta@xilinx.com>
Signed-off-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can')
| -rw-r--r-- | drivers/net/can/xilinx_can.c | 29 |
1 files changed, 8 insertions, 21 deletions
diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c index 2e5cbffc2f4e..a312fe32cf12 100644 --- a/drivers/net/can/xilinx_can.c +++ b/drivers/net/can/xilinx_can.c @@ -66,8 +66,7 @@ enum xcan_reg { #define XCAN_FRAME_DLC_OFFSET(frame_base) ((frame_base) + 0x04) #define XCAN_FRAME_DW1_OFFSET(frame_base) ((frame_base) + 0x08) #define XCAN_FRAME_DW2_OFFSET(frame_base) ((frame_base) + 0x0C) -#define XCANFD_FRAME_DW_OFFSET(frame_base, n) (((frame_base) + 0x08) + \ - ((n) * XCAN_CANFD_FRAME_SIZE)) +#define XCANFD_FRAME_DW_OFFSET(frame_base) ((frame_base) + 0x08) #define XCAN_CANFD_FRAME_SIZE 0x48 #define XCAN_TXMSG_FRAME_OFFSET(n) (XCAN_TXMSG_BASE_OFFSET + \ @@ -589,7 +588,7 @@ static void xcan_write_frame(struct xcan_priv *priv, struct sk_buff *skb, if (priv->devtype.cantype == XAXI_CANFD || priv->devtype.cantype == XAXI_CANFD_2_0) { for (i = 0; i < cf->len; i += 4) { - ramoff = XCANFD_FRAME_DW_OFFSET(frame_offset, dwindex) + + ramoff = XCANFD_FRAME_DW_OFFSET(frame_offset) + (dwindex * XCANFD_DW_BYTES); priv->write_reg(priv, ramoff, be32_to_cpup((__be32 *)(cf->data + i))); @@ -805,10 +804,8 @@ static int xcanfd_rx(struct net_device *ndev, int frame_base) struct net_device_stats *stats = &ndev->stats; struct canfd_frame *cf; struct sk_buff *skb; - u32 id_xcan, dlc, data[2] = {0, 0}, dwindex = 0, i, fsr, readindex; + u32 id_xcan, dlc, data[2] = {0, 0}, dwindex = 0, i, dw_offset; - fsr = priv->read_reg(priv, XCAN_FSR_OFFSET); - readindex = fsr & XCAN_FSR_RI_MASK; id_xcan = priv->read_reg(priv, XCAN_FRAME_ID_OFFSET(frame_base)); dlc = priv->read_reg(priv, XCAN_FRAME_DLC_OFFSET(frame_base)); if (dlc & XCAN_DLCR_EDL_MASK) @@ -852,26 +849,16 @@ static int xcanfd_rx(struct net_device *ndev, int frame_base) /* Check the frame received is FD or not*/ if (dlc & XCAN_DLCR_EDL_MASK) { for (i = 0; i < cf->len; i += 4) { - if (priv->devtype.flags & XCAN_FLAG_CANFD_2) - data[0] = priv->read_reg(priv, - (XCAN_RXMSG_2_FRAME_OFFSET(readindex) + - (dwindex * XCANFD_DW_BYTES))); - else - data[0] = priv->read_reg(priv, - (XCAN_RXMSG_FRAME_OFFSET(readindex) + - (dwindex * XCANFD_DW_BYTES))); + dw_offset = XCANFD_FRAME_DW_OFFSET(frame_base) + + (dwindex * XCANFD_DW_BYTES); + data[0] = priv->read_reg(priv, dw_offset); *(__be32 *)(cf->data + i) = cpu_to_be32(data[0]); dwindex++; } } else { for (i = 0; i < cf->len; i += 4) { - if (priv->devtype.flags & XCAN_FLAG_CANFD_2) - data[0] = priv->read_reg(priv, - XCAN_RXMSG_2_FRAME_OFFSET(readindex) + - i); - else - data[0] = priv->read_reg(priv, - XCAN_RXMSG_FRAME_OFFSET(readindex) + i); + dw_offset = XCANFD_FRAME_DW_OFFSET(frame_base); + data[0] = priv->read_reg(priv, dw_offset + i); *(__be32 *)(cf->data + i) = cpu_to_be32(data[0]); } } |