The errata sheets doesn't say anything about CAN-FD, but tests on the
rk3568v2 and rk3568v3 show that receiving certain CAN-FD frames
triggers an Error Interrupt.
Mark the CAN-FD support as broken.
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
drivers/net/can/rockchip/rockchip_canfd-core.c | 5 ++++-
drivers/net/can/rockchip/rockchip_canfd.h | 21 +++++++++++++++++++++
2 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/rockchip/rockchip_canfd-core.c b/drivers/net/can/rockchip/rockchip_canfd-core.c
index 961eae352ae4..cc529d5a3028 100644
--- a/drivers/net/can/rockchip/rockchip_canfd-core.c
+++ b/drivers/net/can/rockchip/rockchip_canfd-core.c
@@ -31,7 +31,8 @@ static const struct rkcanfd_devtype_data rkcanfd_devtype_data_rk3568v2 = {
RKCANFD_QUIRK_RK3568_ERRATUM_5 | RKCANFD_QUIRK_RK3568_ERRATUM_6 |
RKCANFD_QUIRK_RK3568_ERRATUM_7 | RKCANFD_QUIRK_RK3568_ERRATUM_8 |
RKCANFD_QUIRK_RK3568_ERRATUM_9 | RKCANFD_QUIRK_RK3568_ERRATUM_10 |
- RKCANFD_QUIRK_RK3568_ERRATUM_11 | RKCANFD_QUIRK_RK3568_ERRATUM_12,
+ RKCANFD_QUIRK_RK3568_ERRATUM_11 | RKCANFD_QUIRK_RK3568_ERRATUM_12 |
+ RKCANFD_QUIRK_CANFD_BROKEN,
};
static const char *__rkcanfd_get_model_str(enum rkcanfd_model model)
@@ -823,6 +824,8 @@ static int rkcanfd_probe(struct platform_device *pdev)
priv->can.bittiming_const = &rkcanfd_bittiming_const;
priv->can.data_bittiming_const = &rkcanfd_data_bittiming_const;
priv->can.ctrlmode_supported = 0;
+ if (!(priv->devtype_data.quirks & RKCANFD_QUIRK_CANFD_BROKEN))
+ priv->can.ctrlmode_supported |= CAN_CTRLMODE_FD;
priv->can.do_set_mode = rkcanfd_set_mode;
priv->can.do_get_berr_counter = rkcanfd_get_berr_counter;
priv->ndev = ndev;
diff --git a/drivers/net/can/rockchip/rockchip_canfd.h b/drivers/net/can/rockchip/rockchip_canfd.h
index b267df438a82..43a6682f3651 100644
--- a/drivers/net/can/rockchip/rockchip_canfd.h
+++ b/drivers/net/can/rockchip/rockchip_canfd.h
@@ -348,6 +348,27 @@
*/
#define RKCANFD_QUIRK_RK3568_ERRATUM_12 BIT(11)
+/* Tests on the rk3568v2 and rk3568v3 show that receiving certain
+ * CAN-FD frames trigger an Error Interrupt.
+ *
+ * - Form Error in RX Arbitration Phase: TX_IDLE RX_STUFF_COUNT (0x0a010100) CMD=0 RX=0 TX=0
+ * Error-Warning=1 Bus-Off=0
+ * To reproduce:
+ * host:
+ * cansend can0 002##01f
+ * DUT:
+ * candump any,0:0,#FFFFFFFF -cexdHtA
+ *
+ * - Form Error in RX Arbitration Phase: TX_IDLE RX_CRC (0x0a010200) CMD=0 RX=0 TX=0
+ * Error-Warning=1 Bus-Off=0
+ * To reproduce:
+ * host:
+ * cansend can0 002##07217010000000000
+ * DUT:
+ * candump any,0:0,#FFFFFFFF -cexdHtA
+ */
+#define RKCANFD_QUIRK_CANFD_BROKEN BIT(12)
+
enum rkcanfd_model {
RKCANFD_MODEL_RK3568V2 = 0x35682,
};
--
2.43.0
