static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
{
struct net_device *ndev = netdev;
struct sh_eth_private *mdp = netdev_priv(ndev);
irqreturn_t ret = IRQ_NONE;
u32 ioaddr, boguscnt = RX_RING_SIZE;
u32 intr_status = 0;
ioaddr = ndev->base_addr;
spin_lock(&mdp->lock);
/* Get interrpt stat */
intr_status = ctrl_inl(ioaddr + EESR);
/* Clear interrupt */
if (intr_status & (EESR_FRC | EESR_RMAF | EESR_RRF |
EESR_RTLF | EESR_RTSF | EESR_PRE | EESR_CERF |
TX_CHECK | EESR_ERR_CHECK)) {
ctrl_outl(intr_status, ioaddr + EESR);
ret = IRQ_HANDLED;
} else
goto other_irq;
if (intr_status & (EESR_FRC | /* Frame recv*/
EESR_RMAF | /* Multi cast address recv*/
EESR_RRF | /* Bit frame recv */
EESR_RTLF | /* Long frame recv*/
EESR_RTSF | /* short frame recv */
EESR_PRE | /* PHY-LSI recv error */
EESR_CERF)) { /* recv frame CRC error */
sh_eth_rx(ndev);
}
/* Tx Check */
if (intr_status & TX_CHECK) {
sh_eth_txfree(ndev);
netif_wake_queue(ndev);
}
if (intr_status & EESR_ERR_CHECK)
sh_eth_error(ndev, intr_status);
if (--boguscnt < 0) {
printk(KERN_WARNING
"%s: Too much work at interrupt, status=0x%4.4x.\n",
ndev->name, intr_status);
}
other_irq:
spin_unlock(&mdp->lock);
return ret;
}
/* Packet transmit function */
static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_txdesc *txdesc;
u32 entry;
unsigned long flags;
spin_lock_irqsave(&mdp->lock, flags);
if ((mdp->cur_tx - mdp->dirty_tx) >= (TX_RING_SIZE - 4)) {
if (!sh_eth_txfree(ndev)) {
if (netif_msg_tx_queued(mdp))
dev_warn(&ndev->dev, "TxFD exhausted.\n");
netif_stop_queue(ndev);
spin_unlock_irqrestore(&mdp->lock, flags);
return NETDEV_TX_BUSY;
}
}
spin_unlock_irqrestore(&mdp->lock, flags);
entry = mdp->cur_tx % TX_RING_SIZE;
mdp->tx_skbuff[entry] = skb;
txdesc = &mdp->tx_ring[entry];
txdesc->addr = virt_to_phys(skb->data);
/* soft swap. */
if (!mdp->cd->hw_swap)
sh_eth_soft_swap(phys_to_virt(ALIGN(txdesc->addr, 4)),
skb->len + 2);
/* write back */
__flush_purge_region(skb->data, skb->len);
if (skb->len < ETHERSMALL)
txdesc->buffer_length = ETHERSMALL;
else
txdesc->buffer_length = skb->len;
if (entry >= TX_RING_SIZE - 1)
txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE);
else
txdesc->status |= cpu_to_edmac(mdp, TD_TACT);
mdp->cur_tx++;
if (!(sh_eth_read(ndev, EDTRR) & sh_eth_get_edtrr_trns(mdp)))
sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
return NETDEV_TX_OK;
}
static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
{
struct net_device *ndev = netdev;
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_cpu_data *cd = mdp->cd;
irqreturn_t ret = IRQ_NONE;
u32 ioaddr, intr_status = 0;
ioaddr = ndev->base_addr;
spin_lock(&mdp->lock);
/* Get interrpt stat */
intr_status = readl(ioaddr + EESR);
/* Clear interrupt */
if (intr_status & (EESR_FRC | EESR_RMAF | EESR_RRF |
EESR_RTLF | EESR_RTSF | EESR_PRE | EESR_CERF |
cd->tx_check | cd->eesr_err_check)) {
writel(intr_status, ioaddr + EESR);
ret = IRQ_HANDLED;
} else
goto other_irq;
if (intr_status & (EESR_FRC | /* Frame recv*/
EESR_RMAF | /* Multi cast address recv*/
EESR_RRF | /* Bit frame recv */
EESR_RTLF | /* Long frame recv*/
EESR_RTSF | /* short frame recv */
EESR_PRE | /* PHY-LSI recv error */
EESR_CERF)){ /* recv frame CRC error */
sh_eth_rx(ndev);
}
/* Tx Check */
if (intr_status & cd->tx_check) {
sh_eth_txfree(ndev);
netif_wake_queue(ndev);
}
if (intr_status & cd->eesr_err_check)
sh_eth_error(ndev, intr_status);
other_irq:
spin_unlock(&mdp->lock);
return ret;
}
/* Packet transmit function */
static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_txdesc *txdesc;
u32 entry;
unsigned long flags;
spin_lock_irqsave(&mdp->lock, flags);
if ((mdp->cur_tx - mdp->dirty_tx) >= (TX_RING_SIZE - 4)) {
if (!sh_eth_txfree(ndev)) {
netif_stop_queue(ndev);
spin_unlock_irqrestore(&mdp->lock, flags);
return 1;
}
}
spin_unlock_irqrestore(&mdp->lock, flags);
entry = mdp->cur_tx % TX_RING_SIZE;
mdp->tx_skbuff[entry] = skb;
txdesc = &mdp->tx_ring[entry];
txdesc->addr = (u32)(skb->data);
/* soft swap. */
swaps((char *)(txdesc->addr & ~0x3), skb->len + 2);
/* write back */
__flush_purge_region(skb->data, skb->len);
if (skb->len < ETHERSMALL)
txdesc->buffer_length = ETHERSMALL;
else
txdesc->buffer_length = skb->len;
if (entry >= TX_RING_SIZE - 1)
txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE);
else
txdesc->status |= cpu_to_edmac(mdp, TD_TACT);
mdp->cur_tx++;
if (!(ctrl_inl(ndev->base_addr + EDTRR) & EDTRR_TRNS))
ctrl_outl(EDTRR_TRNS, ndev->base_addr + EDTRR);
ndev->trans_start = jiffies;
return 0;
}
/* error control function */
static void sh_eth_error(struct net_device *ndev, int intr_status)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 ioaddr = ndev->base_addr;
u32 felic_stat;
if (intr_status & EESR_ECI) {
felic_stat = ctrl_inl(ioaddr + ECSR);
ctrl_outl(felic_stat, ioaddr + ECSR); /* clear int */
if (felic_stat & ECSR_ICD)
mdp->stats.tx_carrier_errors++;
if (felic_stat & ECSR_LCHNG) {
/* Link Changed */
u32 link_stat = (ctrl_inl(ioaddr + PSR));
if (!(link_stat & PHY_ST_LINK)) {
/* Link Down : disable tx and rx */
ctrl_outl(ctrl_inl(ioaddr + ECMR) &
~(ECMR_RE | ECMR_TE), ioaddr + ECMR);
} else {
/* Link Up */
ctrl_outl(ctrl_inl(ioaddr + EESIPR) &
~DMAC_M_ECI, ioaddr + EESIPR);
/*clear int */
ctrl_outl(ctrl_inl(ioaddr + ECSR),
ioaddr + ECSR);
ctrl_outl(ctrl_inl(ioaddr + EESIPR) |
DMAC_M_ECI, ioaddr + EESIPR);
/* enable tx and rx */
ctrl_outl(ctrl_inl(ioaddr + ECMR) |
(ECMR_RE | ECMR_TE), ioaddr + ECMR);
}
}
}
if (intr_status & EESR_TWB) {
/* Write buck end. unused write back interrupt */
if (intr_status & EESR_TABT) /* Transmit Abort int */
mdp->stats.tx_aborted_errors++;
}
if (intr_status & EESR_RABT) {
/* Receive Abort int */
if (intr_status & EESR_RFRMER) {
/* Receive Frame Overflow int */
mdp->stats.rx_frame_errors++;
printk(KERN_ERR "Receive Frame Overflow\n");
}
}
#if !defined(CONFIG_CPU_SUBTYPE_SH7763)
if (intr_status & EESR_ADE) {
if (intr_status & EESR_TDE) {
if (intr_status & EESR_TFE)
mdp->stats.tx_fifo_errors++;
}
}
#endif
if (intr_status & EESR_RDE) {
/* Receive Descriptor Empty int */
mdp->stats.rx_over_errors++;
if (ctrl_inl(ioaddr + EDRRR) ^ EDRRR_R)
ctrl_outl(EDRRR_R, ioaddr + EDRRR);
printk(KERN_ERR "Receive Descriptor Empty\n");
}
if (intr_status & EESR_RFE) {
/* Receive FIFO Overflow int */
mdp->stats.rx_fifo_errors++;
printk(KERN_ERR "Receive FIFO Overflow\n");
}
if (intr_status & (EESR_TWB | EESR_TABT |
#if !defined(CONFIG_CPU_SUBTYPE_SH7763)
EESR_ADE |
#endif
EESR_TDE | EESR_TFE)) {
/* Tx error */
u32 edtrr = ctrl_inl(ndev->base_addr + EDTRR);
/* dmesg */
printk(KERN_ERR "%s:TX error. status=%8.8x cur_tx=%8.8x ",
ndev->name, intr_status, mdp->cur_tx);
printk(KERN_ERR "dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
mdp->dirty_tx, (u32) ndev->state, edtrr);
/* dirty buffer free */
sh_eth_txfree(ndev);
/* SH7712 BUG */
if (edtrr ^ EDTRR_TRNS) {
/* tx dma start */
ctrl_outl(EDTRR_TRNS, ndev->base_addr + EDTRR);
}
/* wakeup */
netif_wake_queue(ndev);
}
}
/* error control function */
static void sh_eth_error(struct net_device *ndev, int intr_status)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 felic_stat;
u32 link_stat;
u32 mask;
if (intr_status & EESR_ECI) {
felic_stat = sh_eth_read(ndev, ECSR);
sh_eth_write(ndev, felic_stat, ECSR); /* clear int */
if (felic_stat & ECSR_ICD)
mdp->stats.tx_carrier_errors++;
if (felic_stat & ECSR_LCHNG) {
/* Link Changed */
if (mdp->cd->no_psr || mdp->no_ether_link) {
if (mdp->link == PHY_DOWN)
link_stat = 0;
else
link_stat = PHY_ST_LINK;
} else {
link_stat = (sh_eth_read(ndev, PSR));
if (mdp->ether_link_active_low)
link_stat = ~link_stat;
}
if (!(link_stat & PHY_ST_LINK))
sh_eth_rcv_snd_disable(ndev);
else {
/* Link Up */
sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) &
~DMAC_M_ECI, EESIPR);
/*clear int */
sh_eth_write(ndev, sh_eth_read(ndev, ECSR),
ECSR);
sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) |
DMAC_M_ECI, EESIPR);
/* enable tx and rx */
sh_eth_rcv_snd_enable(ndev);
}
}
}
if (intr_status & EESR_TWB) {
/* Write buck end. unused write back interrupt */
if (intr_status & EESR_TABT) /* Transmit Abort int */
mdp->stats.tx_aborted_errors++;
if (netif_msg_tx_err(mdp))
dev_err(&ndev->dev, "Transmit Abort\n");
}
if (intr_status & EESR_RABT) {
/* Receive Abort int */
if (intr_status & EESR_RFRMER) {
/* Receive Frame Overflow int */
mdp->stats.rx_frame_errors++;
if (netif_msg_rx_err(mdp))
dev_err(&ndev->dev, "Receive Abort\n");
}
}
if (intr_status & EESR_TDE) {
/* Transmit Descriptor Empty int */
mdp->stats.tx_fifo_errors++;
if (netif_msg_tx_err(mdp))
dev_err(&ndev->dev, "Transmit Descriptor Empty\n");
}
if (intr_status & EESR_TFE) {
/* FIFO under flow */
mdp->stats.tx_fifo_errors++;
if (netif_msg_tx_err(mdp))
dev_err(&ndev->dev, "Transmit FIFO Under flow\n");
}
if (intr_status & EESR_RDE) {
/* Receive Descriptor Empty int */
mdp->stats.rx_over_errors++;
if (sh_eth_read(ndev, EDRRR) ^ EDRRR_R)
sh_eth_write(ndev, EDRRR_R, EDRRR);
if (netif_msg_rx_err(mdp))
dev_err(&ndev->dev, "Receive Descriptor Empty\n");
}
if (intr_status & EESR_RFE) {
/* Receive FIFO Overflow int */
mdp->stats.rx_fifo_errors++;
if (netif_msg_rx_err(mdp))
dev_err(&ndev->dev, "Receive FIFO Overflow\n");
}
if (!mdp->cd->no_ade && (intr_status & EESR_ADE)) {
/* Address Error */
mdp->stats.tx_fifo_errors++;
if (netif_msg_tx_err(mdp))
dev_err(&ndev->dev, "Address Error\n");
}
mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
if (mdp->cd->no_ade)
mask &= ~EESR_ADE;
if (intr_status & mask) {
/* Tx error */
u32 edtrr = sh_eth_read(ndev, EDTRR);
/* dmesg */
dev_err(&ndev->dev, "TX error. status=%8.8x cur_tx=%8.8x ",
intr_status, mdp->cur_tx);
dev_err(&ndev->dev, "dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
mdp->dirty_tx, (u32) ndev->state, edtrr);
/* dirty buffer free */
sh_eth_txfree(ndev);
/* SH7712 BUG */
if (edtrr ^ sh_eth_get_edtrr_trns(mdp)) {
/* tx dma start */
sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
}
/* wakeup */
netif_wake_queue(ndev);
}
}
/* error control function */
static void sh_eth_error(struct net_device *ndev, int intr_status)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 ioaddr = ndev->base_addr;
u32 felic_stat;
u32 link_stat;
u32 mask;
if (intr_status & EESR_ECI) {
felic_stat = readl(ioaddr + ECSR);
writel(felic_stat, ioaddr + ECSR); /* clear int */
if (felic_stat & ECSR_ICD)
mdp->stats.tx_carrier_errors++;
if (felic_stat & ECSR_LCHNG) {
/* Link Changed */
if (mdp->cd->no_psr || mdp->no_ether_link) {
if (mdp->link == PHY_DOWN)
link_stat = 0;
else
link_stat = PHY_ST_LINK;
} else {
link_stat = (readl(ioaddr + PSR));
if (mdp->ether_link_active_low)
link_stat = ~link_stat;
}
if (!(link_stat & PHY_ST_LINK)) {
/* Link Down : disable tx and rx */
writel(readl(ioaddr + ECMR) &
~(ECMR_RE | ECMR_TE), ioaddr + ECMR);
} else {
/* Link Up */
writel(readl(ioaddr + EESIPR) &
~DMAC_M_ECI, ioaddr + EESIPR);
/*clear int */
writel(readl(ioaddr + ECSR),
ioaddr + ECSR);
writel(readl(ioaddr + EESIPR) |
DMAC_M_ECI, ioaddr + EESIPR);
/* enable tx and rx */
writel(readl(ioaddr + ECMR) |
(ECMR_RE | ECMR_TE), ioaddr + ECMR);
}
}
}
if (intr_status & EESR_TWB) {
/* Write buck end. unused write back interrupt */
if (intr_status & EESR_TABT) /* Transmit Abort int */
mdp->stats.tx_aborted_errors++;
}
if (intr_status & EESR_RABT) {
/* Receive Abort int */
if (intr_status & EESR_RFRMER) {
/* Receive Frame Overflow int */
mdp->stats.rx_frame_errors++;
dev_err(&ndev->dev, "Receive Frame Overflow\n");
}
}
if (!mdp->cd->no_ade) {
if (intr_status & EESR_ADE && intr_status & EESR_TDE &&
intr_status & EESR_TFE)
mdp->stats.tx_fifo_errors++;
}
if (intr_status & EESR_RDE) {
/* Receive Descriptor Empty int */
mdp->stats.rx_over_errors++;
if (readl(ioaddr + EDRRR) ^ EDRRR_R)
writel(EDRRR_R, ioaddr + EDRRR);
dev_err(&ndev->dev, "Receive Descriptor Empty\n");
}
if (intr_status & EESR_RFE) {
/* Receive FIFO Overflow int */
mdp->stats.rx_fifo_errors++;
dev_err(&ndev->dev, "Receive FIFO Overflow\n");
}
mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
if (mdp->cd->no_ade)
mask &= ~EESR_ADE;
if (intr_status & mask) {
/* Tx error */
u32 edtrr = readl(ndev->base_addr + EDTRR);
/* dmesg */
dev_err(&ndev->dev, "TX error. status=%8.8x cur_tx=%8.8x ",
intr_status, mdp->cur_tx);
dev_err(&ndev->dev, "dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
mdp->dirty_tx, (u32) ndev->state, edtrr);
/* dirty buffer free */
sh_eth_txfree(ndev);
/* SH7712 BUG */
if (edtrr ^ EDTRR_TRNS) {
/* tx dma start */
writel(EDTRR_TRNS, ndev->base_addr + EDTRR);
}
/* wakeup */
netif_wake_queue(ndev);
}
}
