Reviewed-by: Naga Sureshkumar Relli <naga.sureshkumar.relli@xxxxxxxxxx> > -----Original Message----- > From: Srinivas Neeli <srinivas.neeli@xxxxxxxxxx> > Sent: Tuesday, December 3, 2019 5:47 PM > To: wg@xxxxxxxxxxxxxx; mkl@xxxxxxxxxxxxxx; davem@xxxxxxxxxxxxx; Michal Simek > <michals@xxxxxxxxxx>; Appana Durga Kedareswara Rao <appanad@xxxxxxxxxx> > Cc: linux-can@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-arm- > kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; git <git@xxxxxxxxxx>; Naga > Sureshkumar Relli <nagasure@xxxxxxxxxx>; Srinivas Neeli <sneeli@xxxxxxxxxx> > Subject: [PATCH V2] can: xilinx_can: Fix missing Rx can packets on CANFD2.0 > > 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@xxxxxxxxxx> > Signed-off-by: Srinivas Neeli <srinivas.neeli@xxxxxxxxxx> > --- > drivers/net/can/xilinx_can.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c index > 464af939cd8a..c1dbab8c896d 100644 > --- 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) > @@ -1809,6 +1811,11 @@ static int xcan_probe(struct platform_device *pdev) > > 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); > -- > 2.7.4