Commit 9ab79b06 authored by Srinivas Neeli's avatar Srinivas Neeli Committed by Marc Kleine-Budde

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: 0db90713 ("can: xilinx: add can 2.0 support")
Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
Signed-off-by: default avatarSrinivas Neeli <srinivas.neeli@xilinx.com>
Reviewed-by: default avatarNaga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v5.0
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 8ac9d71d
......@@ -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);
......
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