diff options
Diffstat (limited to 'drivers/net/can')
| -rw-r--r-- | drivers/net/can/flexcan.c | 42 |
1 files changed, 24 insertions, 18 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index 0a00a6dd7994..1a7df29a0f32 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -143,9 +143,9 @@ /* FLEXCAN interrupt flag register (IFLAG) bits */ /* Errata ERR005829 step7: Reserve first valid MB */ -#define FLEXCAN_TX_BUF_RESERVED 8 -#define FLEXCAN_TX_BUF_ID 9 -#define FLEXCAN_IFLAG_BUF(x) BIT(x) +#define FLEXCAN_TX_MB_RESERVED_OFF_FIFO 8 +#define FLEXCAN_TX_MB_OFF_FIFO 9 +#define FLEXCAN_IFLAG_MB(x) BIT(x) #define FLEXCAN_IFLAG_RX_FIFO_OVERFLOW BIT(7) #define FLEXCAN_IFLAG_RX_FIFO_WARN BIT(6) #define FLEXCAN_IFLAG_RX_FIFO_AVAILABLE BIT(5) @@ -256,6 +256,9 @@ struct flexcan_priv { struct napi_struct napi; struct flexcan_regs __iomem *regs; + struct flexcan_mb __iomem *tx_mb; + struct flexcan_mb __iomem *tx_mb_reserved; + u8 tx_mb_idx; u32 reg_esr; u32 reg_ctrl_default; u32 reg_imask1_default; @@ -472,7 +475,6 @@ static int flexcan_get_berr_counter(const struct net_device *dev, static int flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev) { const struct flexcan_priv *priv = netdev_priv(dev); - struct flexcan_regs __iomem *regs = priv->regs; struct can_frame *cf = (struct can_frame *)skb->data; u32 can_id; u32 data; @@ -495,25 +497,25 @@ static int flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev) if (cf->can_dlc > 0) { data = be32_to_cpup((__be32 *)&cf->data[0]); - flexcan_write(data, ®s->mb[FLEXCAN_TX_BUF_ID].data[0]); + flexcan_write(data, &priv->tx_mb->data[0]); } if (cf->can_dlc > 3) { data = be32_to_cpup((__be32 *)&cf->data[4]); - flexcan_write(data, ®s->mb[FLEXCAN_TX_BUF_ID].data[1]); + flexcan_write(data, &priv->tx_mb->data[1]); } can_put_echo_skb(skb, dev, 0); - flexcan_write(can_id, ®s->mb[FLEXCAN_TX_BUF_ID].can_id); - flexcan_write(ctrl, ®s->mb[FLEXCAN_TX_BUF_ID].can_ctrl); + flexcan_write(can_id, &priv->tx_mb->can_id); + flexcan_write(ctrl, &priv->tx_mb->can_ctrl); /* Errata ERR005829 step8: * Write twice INACTIVE(0x8) code to first MB. */ flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, - ®s->mb[FLEXCAN_TX_BUF_RESERVED].can_ctrl); + &priv->tx_mb_reserved->can_ctrl); flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, - ®s->mb[FLEXCAN_TX_BUF_RESERVED].can_ctrl); + &priv->tx_mb_reserved->can_ctrl); return NETDEV_TX_OK; } @@ -750,7 +752,7 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id) } /* transmission complete interrupt */ - if (reg_iflag1 & (1 << FLEXCAN_TX_BUF_ID)) { + if (reg_iflag1 & FLEXCAN_IFLAG_MB(priv->tx_mb_idx)) { handled = IRQ_HANDLED; stats->tx_bytes += can_get_echo_skb(dev, 0); stats->tx_packets++; @@ -758,8 +760,8 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id) /* after sending a RTR frame MB is in RX mode */ flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, - ®s->mb[FLEXCAN_TX_BUF_ID].can_ctrl); - flexcan_write((1 << FLEXCAN_TX_BUF_ID), ®s->iflag1); + &priv->tx_mb->can_ctrl); + flexcan_write(FLEXCAN_IFLAG_MB(priv->tx_mb_idx), ®s->iflag1); netif_wake_queue(dev); } @@ -849,7 +851,7 @@ static int flexcan_chip_start(struct net_device *dev) reg_mcr &= ~FLEXCAN_MCR_MAXMB(0xff); reg_mcr |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_FEN | FLEXCAN_MCR_HALT | FLEXCAN_MCR_SUPV | FLEXCAN_MCR_WRN_EN | FLEXCAN_MCR_SRX_DIS | - FLEXCAN_MCR_IDAM_C | FLEXCAN_MCR_MAXMB(FLEXCAN_TX_BUF_ID); + FLEXCAN_MCR_IDAM_C | FLEXCAN_MCR_MAXMB(priv->tx_mb_idx); netdev_dbg(dev, "%s: writing mcr=0x%08x", __func__, reg_mcr); flexcan_write(reg_mcr, ®s->mcr); @@ -887,18 +889,18 @@ static int flexcan_chip_start(struct net_device *dev) flexcan_write(reg_ctrl, ®s->ctrl); /* clear and invalidate all mailboxes first */ - for (i = FLEXCAN_TX_BUF_ID; i < ARRAY_SIZE(regs->mb); i++) { + for (i = priv->tx_mb_idx; i < ARRAY_SIZE(regs->mb); i++) { flexcan_write(FLEXCAN_MB_CODE_RX_INACTIVE, ®s->mb[i].can_ctrl); } /* Errata ERR005829: mark first TX mailbox as INACTIVE */ flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, - ®s->mb[FLEXCAN_TX_BUF_RESERVED].can_ctrl); + &priv->tx_mb_reserved->can_ctrl); /* mark TX mailbox as INACTIVE */ flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, - ®s->mb[FLEXCAN_TX_BUF_ID].can_ctrl); + &priv->tx_mb->can_ctrl); /* acceptance mask/acceptance code (accept everything) */ flexcan_write(0x0, ®s->rxgmask); @@ -1229,9 +1231,13 @@ static int flexcan_probe(struct platform_device *pdev) priv->devtype_data = devtype_data; priv->reg_xceiver = reg_xceiver; + priv->tx_mb_idx = FLEXCAN_TX_MB_OFF_FIFO; + priv->tx_mb_reserved = ®s->mb[FLEXCAN_TX_MB_RESERVED_OFF_FIFO]; + priv->tx_mb = ®s->mb[priv->tx_mb_idx]; + priv->reg_imask1_default = FLEXCAN_IFLAG_RX_FIFO_OVERFLOW | FLEXCAN_IFLAG_RX_FIFO_AVAILABLE | - FLEXCAN_IFLAG_BUF(FLEXCAN_TX_BUF_ID); + FLEXCAN_IFLAG_MB(priv->tx_mb_idx); netif_napi_add(dev, &priv->napi, flexcan_poll, FLEXCAN_NAPI_WEIGHT); |