Rockchip, RK3588内部集成的CAN总线控制器故障处理

gxliu08

CAN接收和发送异常，包括丢帧、错误计数增加、过滤错误等问题处理

gxliu08

陆续补充错误处理方法，注意基于RK3588，其它采用同样IP的瑞芯微SOC估计也都有这些问题

gxliu08

History for　kernel／drivers／net／can／rockchip／rockchip_canfd.c　on　develop-5.10

Commits on Nov 6, 2023
net: can: rockchip: use soft reset for bus off
on Nov 6, 2023
net: can: rockchip: fix rx stuck and timeout
on Nov 6, 2023
net: can: rockchip: support Listen-only mode
on Nov 6, 2023
net: can: rockchip: fix tx error in special application
on Nov 6, 2023
Commits on Aug 9, 2023
net: can: rockchip: support rk3568 can v2
on Aug 9, 2023
Commits on Oct 28, 2022
net: can: rockchip: canfd: Add delay work to check tx errors
on Oct 28, 2022
Commits on Sep 30, 2022
net: can: rockchip: canfd: Support extended frames transmit for rk3568
on Sep 30, 2022
Commits on Sep 1, 2022
net: can: rockchip: fix up the canfd/can BUS_OFF_INT error
on Sep 1, 2022
Commits on Dec 2, 2021
net: can: rockchip: fix up the canfd/can error
on Dec 2, 2021
Commits on Dec 1, 2021
net: can: rockchip: support can-2.0
on Dec 1, 2021
Commits on Aug 11, 2021
net: can: add rockchip CAN driver
on Aug 11, 2021
Commits on Mar 5, 2021
net: can: rockchip: fix up the receiving filter ID
on Mar 5, 2021
Commits on Jan 5, 2021
net: can: rockchip: canfd: fix up the bus error
on Jan 5, 2021
Commits on Aug 25, 2020
net: can: rockchip: modify the usleep to udelay
on Aug 25, 2020
Commits on Jul 16, 2020
net: can: add rockchip CANFD driver
on Jul 16, 2020

gxliu08

static int rockchip_canfd_err(struct net_device *ndev, u32 isr)
{
        struct rockchip_canfd *rcan = netdev_priv(ndev);
        struct net_device_stats *stats = &ndev->stats;
        struct can_frame *cf;
        struct sk_buff *skb;
        unsigned int rxerr, txerr;
        u32 sta_reg;

        skb = alloc_can_err_skb(ndev, &cf);

        rxerr = rockchip_canfd_read(rcan, CAN_RX_ERR_CNT);
        txerr = rockchip_canfd_read(rcan, CAN_TX_ERR_CNT);
        sta_reg = rockchip_canfd_read(rcan, CAN_STATE);

        if (skb) {
                cf->data[6] = txerr;
                cf->data[7] = rxerr;
        }

        if (isr & BUS_OFF_INT) {
                rcan->can.state = CAN_STATE_BUS_OFF;
                rcan->can.can_stats.bus_off++;
                cf->can_id |= CAN_ERR_BUSOFF;
        } else if (isr & ERR_WARN_INT) {
                rcan->can.can_stats.error_warning++;
                rcan->can.state = CAN_STATE_ERROR_WARNING;
                /* error warning state */
                if (likely(skb)) {
                        cf->can_id |= CAN_ERR_CRTL;
                        cf->data[1] = (txerr > rxerr) ?
                                CAN_ERR_CRTL_TX_WARNING :
                                CAN_ERR_CRTL_RX_WARNING;
                        cf->data[6] = txerr;
                        cf->data[7] = rxerr;
                }
        } else if (isr & PASSIVE_ERR_INT) {
                rcan->can.can_stats.error_passive++;
                rcan->can.state = CAN_STATE_ERROR_PASSIVE;
                /* error passive state */
                cf->can_id |= CAN_ERR_CRTL;
                cf->data[1] = (txerr > rxerr) ?
                                        CAN_ERR_CRTL_TX_WARNING :
                                        CAN_ERR_CRTL_RX_WARNING;
                cf->data[6] = txerr;
                cf->data[7] = rxerr;
        }

        if (rcan->can.state >= CAN_STATE_BUS_OFF ||
            ((sta_reg & CAN_BUSOFF_FLAG) == CAN_BUSOFF_FLAG)) {
                cancel_delayed_work(&rcan->tx_err_work);
                netif_stop_queue(ndev);
                rockchip_canfd_stop(ndev);
                can_free_echo_skb(ndev, 0);
                rockchip_canfd_start(ndev);
                netif_start_queue(ndev);
        }

        stats->rx_packets++;
        stats->rx_bytes += cf->can_dlc;
        netif_rx(skb);

        return 0;
}