From: Srinivas Neeli srinivas.neeli@xilinx.com
commit 9ab79b06ddf3cdf6484d60b3e5fe113e733145c8 upstream.
CANFD2.0 core uses BRAM for storing acceptance filter ID(AFID) and MASK (AFMASK)registers. So by default AFID and AFMASK registers contain random data. Due to random data, we are not able to receive all CAN ids.
Initializing AFID and AFMASK registers with Zero before enabling acceptance filter to receive all packets irrespective of ID and Mask.
Fixes: 0db9071353a0 ("can: xilinx: add can 2.0 support") Signed-off-by: Michal Simek michal.simek@xilinx.com Signed-off-by: Srinivas Neeli srinivas.neeli@xilinx.com Reviewed-by: Naga Sureshkumar Relli naga.sureshkumar.relli@xilinx.com Cc: linux-stable stable@vger.kernel.org # >= v5.0 Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/can/xilinx_can.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/net/can/xilinx_can.c +++ b/drivers/net/can/xilinx_can.c @@ -60,6 +60,8 @@ enum xcan_reg { XCAN_TXMSG_BASE_OFFSET = 0x0100, /* TX Message Space */ XCAN_RXMSG_BASE_OFFSET = 0x1100, /* RX Message Space */ XCAN_RXMSG_2_BASE_OFFSET = 0x2100, /* RX Message Space */ + XCAN_AFR_2_MASK_OFFSET = 0x0A00, /* Acceptance Filter MASK */ + XCAN_AFR_2_ID_OFFSET = 0x0A04, /* Acceptance Filter ID */ };
#define XCAN_FRAME_ID_OFFSET(frame_base) ((frame_base) + 0x00) @@ -1803,6 +1805,11 @@ static int xcan_probe(struct platform_de
pm_runtime_put(&pdev->dev);
+ if (priv->devtype.flags & XCAN_FLAG_CANFD_2) { + priv->write_reg(priv, XCAN_AFR_2_ID_OFFSET, 0x00000000); + priv->write_reg(priv, XCAN_AFR_2_MASK_OFFSET, 0x00000000); + } + netdev_dbg(ndev, "reg_base=0x%p irq=%d clock=%d, tx buffers: actual %d, using %d\n", priv->reg_base, ndev->irq, priv->can.clock.freq, hw_tx_max, priv->tx_max);