diff options
Diffstat (limited to 'drivers/net/can')
| -rw-r--r-- | drivers/net/can/ifi_canfd/ifi_canfd.c | 113 |
1 files changed, 107 insertions, 6 deletions
diff --git a/drivers/net/can/ifi_canfd/ifi_canfd.c b/drivers/net/can/ifi_canfd/ifi_canfd.c index ba6cd43e1bc6..2d1d22eec750 100644 --- a/drivers/net/can/ifi_canfd/ifi_canfd.c +++ b/drivers/net/can/ifi_canfd/ifi_canfd.c @@ -52,7 +52,8 @@ #define IFI_CANFD_TXSTCMD_OVERFLOW BIT(13) #define IFI_CANFD_INTERRUPT 0xc -#define IFI_CANFD_INTERRUPT_ERROR_WARNING ((u32)BIT(1)) +#define IFI_CANFD_INTERRUPT_ERROR_WARNING BIT(1) +#define IFI_CANFD_INTERRUPT_ERROR_COUNTER BIT(10) #define IFI_CANFD_INTERRUPT_TXFIFO_EMPTY BIT(16) #define IFI_CANFD_INTERRUPT_TXFIFO_REMOVE BIT(22) #define IFI_CANFD_INTERRUPT_RXFIFO_NEMPTY BIT(24) @@ -103,7 +104,26 @@ #define IFI_CANFD_RES1 0x40 -#define IFI_CANFD_RES2 0x44 +#define IFI_CANFD_ERROR_CTR 0x44 +#define IFI_CANFD_ERROR_CTR_UNLOCK_MAGIC 0x21302899 +#define IFI_CANFD_ERROR_CTR_OVERLOAD_FIRST BIT(0) +#define IFI_CANFD_ERROR_CTR_ACK_ERROR_FIRST BIT(1) +#define IFI_CANFD_ERROR_CTR_BIT0_ERROR_FIRST BIT(2) +#define IFI_CANFD_ERROR_CTR_BIT1_ERROR_FIRST BIT(3) +#define IFI_CANFD_ERROR_CTR_STUFF_ERROR_FIRST BIT(4) +#define IFI_CANFD_ERROR_CTR_CRC_ERROR_FIRST BIT(5) +#define IFI_CANFD_ERROR_CTR_FORM_ERROR_FIRST BIT(6) +#define IFI_CANFD_ERROR_CTR_OVERLOAD_ALL BIT(8) +#define IFI_CANFD_ERROR_CTR_ACK_ERROR_ALL BIT(9) +#define IFI_CANFD_ERROR_CTR_BIT0_ERROR_ALL BIT(10) +#define IFI_CANFD_ERROR_CTR_BIT1_ERROR_ALL BIT(11) +#define IFI_CANFD_ERROR_CTR_STUFF_ERROR_ALL BIT(12) +#define IFI_CANFD_ERROR_CTR_CRC_ERROR_ALL BIT(13) +#define IFI_CANFD_ERROR_CTR_FORM_ERROR_ALL BIT(14) +#define IFI_CANFD_ERROR_CTR_BITPOSITION_OFFSET 16 +#define IFI_CANFD_ERROR_CTR_BITPOSITION_MASK 0xff +#define IFI_CANFD_ERROR_CTR_ER_RESET BIT(30) +#define IFI_CANFD_ERROR_CTR_ER_ENABLE ((u32)BIT(31)) #define IFI_CANFD_PAR 0x48 @@ -197,6 +217,8 @@ static void ifi_canfd_irq_enable(struct net_device *ndev, bool enable) if (enable) { enirq = IFI_CANFD_IRQMASK_TXFIFO_EMPTY | IFI_CANFD_IRQMASK_RXFIFO_NEMPTY; + if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) + enirq |= IFI_CANFD_INTERRUPT_ERROR_COUNTER; } writel(IFI_CANFD_IRQMASK_SET_ERR | @@ -335,6 +357,68 @@ static int ifi_canfd_handle_lost_msg(struct net_device *ndev) return 1; } +static int ifi_canfd_handle_lec_err(struct net_device *ndev, const u32 errctr) +{ + struct ifi_canfd_priv *priv = netdev_priv(ndev); + struct net_device_stats *stats = &ndev->stats; + struct can_frame *cf; + struct sk_buff *skb; + const u32 errmask = IFI_CANFD_ERROR_CTR_OVERLOAD_FIRST | + IFI_CANFD_ERROR_CTR_ACK_ERROR_FIRST | + IFI_CANFD_ERROR_CTR_BIT0_ERROR_FIRST | + IFI_CANFD_ERROR_CTR_BIT1_ERROR_FIRST | + IFI_CANFD_ERROR_CTR_STUFF_ERROR_FIRST | + IFI_CANFD_ERROR_CTR_CRC_ERROR_FIRST | + IFI_CANFD_ERROR_CTR_FORM_ERROR_FIRST; + + if (!(errctr & errmask)) /* No error happened. */ + return 0; + + priv->can.can_stats.bus_error++; + stats->rx_errors++; + + /* Propagate the error condition to the CAN stack. */ + skb = alloc_can_err_skb(ndev, &cf); + if (unlikely(!skb)) + return 0; + + /* Read the error counter register and check for new errors. */ + cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR; + + if (errctr & IFI_CANFD_ERROR_CTR_OVERLOAD_FIRST) + cf->data[2] |= CAN_ERR_PROT_OVERLOAD; + + if (errctr & IFI_CANFD_ERROR_CTR_ACK_ERROR_FIRST) + cf->data[3] = CAN_ERR_PROT_LOC_ACK; + + if (errctr & IFI_CANFD_ERROR_CTR_BIT0_ERROR_FIRST) + cf->data[2] |= CAN_ERR_PROT_BIT0; + + if (errctr & IFI_CANFD_ERROR_CTR_BIT1_ERROR_FIRST) + cf->data[2] |= CAN_ERR_PROT_BIT1; + + if (errctr & IFI_CANFD_ERROR_CTR_STUFF_ERROR_FIRST) + cf->data[2] |= CAN_ERR_PROT_STUFF; + + if (errctr & IFI_CANFD_ERROR_CTR_CRC_ERROR_FIRST) + cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; + + if (errctr & IFI_CANFD_ERROR_CTR_FORM_ERROR_FIRST) + cf->data[2] |= CAN_ERR_PROT_FORM; + + /* Reset the error counter, ack the IRQ and re-enable the counter. */ + writel(IFI_CANFD_ERROR_CTR_ER_RESET, priv->base + IFI_CANFD_ERROR_CTR); + writel(IFI_CANFD_INTERRUPT_ERROR_COUNTER, + priv->base + IFI_CANFD_INTERRUPT); + writel(IFI_CANFD_ERROR_CTR_ER_ENABLE, priv->base + IFI_CANFD_ERROR_CTR); + + stats->rx_packets++; + stats->rx_bytes += cf->can_dlc; + netif_receive_skb(skb); + + return 1; +} + static int ifi_canfd_get_berr_counter(const struct net_device *ndev, struct can_berr_counter *bec) { @@ -470,6 +554,7 @@ static int ifi_canfd_poll(struct napi_struct *napi, int quota) u32 stcmd = readl(priv->base + IFI_CANFD_STCMD); u32 rxstcmd = readl(priv->base + IFI_CANFD_STCMD); + u32 errctr = readl(priv->base + IFI_CANFD_ERROR_CTR); /* Handle bus state changes */ if ((stcmd & stcmd_state_mask) || @@ -480,6 +565,10 @@ static int ifi_canfd_poll(struct napi_struct *napi, int quota) if (rxstcmd & IFI_CANFD_RXSTCMD_OVERFLOW) work_done += ifi_canfd_handle_lost_msg(ndev); + /* Handle lec errors on the bus */ + if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) + work_done += ifi_canfd_handle_lec_err(ndev, errctr); + /* Handle normal messages on RX */ if (!(rxstcmd & IFI_CANFD_RXSTCMD_EMPTY)) work_done += ifi_canfd_do_rx_poll(ndev, quota - work_done); @@ -499,11 +588,12 @@ static irqreturn_t ifi_canfd_isr(int irq, void *dev_id) struct net_device_stats *stats = &ndev->stats; const u32 rx_irq_mask = IFI_CANFD_INTERRUPT_RXFIFO_NEMPTY | IFI_CANFD_INTERRUPT_RXFIFO_NEMPTY_PER | - IFI_CANFD_INTERRUPT_ERROR_WARNING; + IFI_CANFD_INTERRUPT_ERROR_WARNING | + IFI_CANFD_INTERRUPT_ERROR_COUNTER; const u32 tx_irq_mask = IFI_CANFD_INTERRUPT_TXFIFO_EMPTY | IFI_CANFD_INTERRUPT_TXFIFO_REMOVE; - const u32 clr_irq_mask = ~(IFI_CANFD_INTERRUPT_SET_IRQ | - IFI_CANFD_INTERRUPT_ERROR_WARNING); + const u32 clr_irq_mask = ~((u32)(IFI_CANFD_INTERRUPT_SET_IRQ | + IFI_CANFD_INTERRUPT_ERROR_WARNING)); u32 isr; isr = readl(priv->base + IFI_CANFD_INTERRUPT); @@ -657,6 +747,12 @@ static void ifi_canfd_start(struct net_device *ndev) ifi_canfd_irq_enable(ndev, 1); + /* Unlock, reset and enable the error counter. */ + writel(IFI_CANFD_ERROR_CTR_UNLOCK_MAGIC, + priv->base + IFI_CANFD_ERROR_CTR); + writel(IFI_CANFD_ERROR_CTR_ER_RESET, priv->base + IFI_CANFD_ERROR_CTR); + writel(IFI_CANFD_ERROR_CTR_ER_ENABLE, priv->base + IFI_CANFD_ERROR_CTR); + /* Enable controller */ writel(stcmd, priv->base + IFI_CANFD_STCMD); } @@ -665,6 +761,10 @@ static void ifi_canfd_stop(struct net_device *ndev) { struct ifi_canfd_priv *priv = netdev_priv(ndev); + /* Reset and disable the error counter. */ + writel(IFI_CANFD_ERROR_CTR_ER_RESET, priv->base + IFI_CANFD_ERROR_CTR); + writel(0, priv->base + IFI_CANFD_ERROR_CTR); + /* Reset the IP */ writel(IFI_CANFD_STCMD_HARDRESET, priv->base + IFI_CANFD_STCMD); @@ -868,7 +968,8 @@ static int ifi_canfd_plat_probe(struct platform_device *pdev) priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK | CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_FD | - CAN_CTRLMODE_FD_NON_ISO; + CAN_CTRLMODE_FD_NON_ISO | + CAN_CTRLMODE_BERR_REPORTING; platform_set_drvdata(pdev, ndev); SET_NETDEV_DEV(ndev, dev); |