diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/r6040.c | 99 |
1 files changed, 58 insertions, 41 deletions
diff --git a/drivers/net/r6040.c b/drivers/net/r6040.c index d277deb872e0..0972152e5d28 100644 --- a/drivers/net/r6040.c +++ b/drivers/net/r6040.c @@ -295,7 +295,6 @@ static void r6040_init_ring_desc(struct r6040_descriptor *desc_ring, static void r6040_rx_buf_alloc(struct r6040_private *lp, struct net_device *dev) { struct r6040_descriptor *descptr; - void __iomem *ioaddr = lp->base; descptr = lp->rx_insert_ptr; while (lp->rx_free_desc < RX_DCNT) { @@ -309,8 +308,6 @@ static void r6040_rx_buf_alloc(struct r6040_private *lp, struct net_device *dev) descptr->status = 0x8000; descptr = descptr->vndescp; lp->rx_free_desc++; - /* Trigger RX DMA */ - iowrite16(lp->mcr0 | 0x0002, ioaddr); } lp->rx_insert_ptr = descptr; } @@ -318,21 +315,16 @@ static void r6040_rx_buf_alloc(struct r6040_private *lp, struct net_device *dev) static void r6040_alloc_txbufs(struct net_device *dev) { struct r6040_private *lp = netdev_priv(dev); - void __iomem *ioaddr = lp->base; lp->tx_free_desc = TX_DCNT; lp->tx_remove_ptr = lp->tx_insert_ptr = lp->tx_ring; r6040_init_ring_desc(lp->tx_ring, lp->tx_ring_dma, TX_DCNT); - - iowrite16(lp->tx_ring_dma, ioaddr + MTD_SA0); - iowrite16(lp->tx_ring_dma >> 16, ioaddr + MTD_SA1); } static void r6040_alloc_rxbufs(struct net_device *dev) { struct r6040_private *lp = netdev_priv(dev); - void __iomem *ioaddr = lp->base; lp->rx_free_desc = 0; @@ -340,9 +332,58 @@ static void r6040_alloc_rxbufs(struct net_device *dev) r6040_init_ring_desc(lp->rx_ring, lp->rx_ring_dma, RX_DCNT); r6040_rx_buf_alloc(lp, dev); +} + +static void r6040_init_mac_regs(struct net_device *dev) +{ + struct r6040_private *lp = netdev_priv(dev); + void __iomem *ioaddr = lp->base; + int limit = 2048; + u16 cmd; + + /* Mask Off Interrupt */ + iowrite16(MSK_INT, ioaddr + MIER); + /* Reset RDC MAC */ + iowrite16(MAC_RST, ioaddr + MCR1); + while (limit--) { + cmd = ioread16(ioaddr + MCR1); + if (cmd & 0x1) + break; + } + /* Reset internal state machine */ + iowrite16(2, ioaddr + MAC_SM); + iowrite16(0, ioaddr + MAC_SM); + udelay(5000); + + /* MAC Bus Control Register */ + iowrite16(MBCR_DEFAULT, ioaddr + MBCR); + + /* Buffer Size Register */ + iowrite16(MAX_BUF_SIZE, ioaddr + MR_BSR); + + /* Write TX ring start address */ + iowrite16(lp->tx_ring_dma, ioaddr + MTD_SA0); + iowrite16(lp->tx_ring_dma >> 16, ioaddr + MTD_SA1); + + /* Write RX ring start address */ iowrite16(lp->rx_ring_dma, ioaddr + MRD_SA0); iowrite16(lp->rx_ring_dma >> 16, ioaddr + MRD_SA1); + + /* Set interrupt waiting time and packet numbers */ + iowrite16(0x0F06, ioaddr + MT_ICR); + iowrite16(0x0F06, ioaddr + MR_ICR); + + /* Enable interrupts */ + iowrite16(INT_MASK, ioaddr + MIER); + + /* Enable TX and RX */ + iowrite16(lp->mcr0 | 0x0002, ioaddr); + + /* Let TX poll the descriptors + * we may got called by r6040_tx_timeout which has left + * some unsent tx buffers */ + iowrite16(0x01, ioaddr + MTPR); } static void r6040_tx_timeout(struct net_device *dev) @@ -350,27 +391,16 @@ static void r6040_tx_timeout(struct net_device *dev) struct r6040_private *priv = netdev_priv(dev); void __iomem *ioaddr = priv->base; - printk(KERN_WARNING "%s: transmit timed out, status %4.4x, PHY status " - "%4.4x\n", + printk(KERN_WARNING "%s: transmit timed out, int enable %4.4x " + "status %4.4x, PHY status %4.4x\n", dev->name, ioread16(ioaddr + MIER), + ioread16(ioaddr + MISR), r6040_mdio_read(dev, priv->mii_if.phy_id, MII_BMSR)); - disable_irq(dev->irq); - napi_disable(&priv->napi); - spin_lock(&priv->lock); - /* Clear all descriptors */ - r6040_free_txbufs(dev); - r6040_free_rxbufs(dev); - r6040_alloc_txbufs(dev); - r6040_alloc_rxbufs(dev); - - /* Reset MAC */ - iowrite16(MAC_RST, ioaddr + MCR1); - spin_unlock(&priv->lock); - enable_irq(dev->irq); - dev->stats.tx_errors++; - netif_wake_queue(dev); + + /* Reset MAC and re-init all registers */ + r6040_init_mac_regs(dev); } static struct net_device_stats *r6040_get_stats(struct net_device *dev) @@ -676,8 +706,6 @@ static void r6040_up(struct net_device *dev) r6040_alloc_txbufs(dev); r6040_alloc_rxbufs(dev); - /* Buffer Size Register */ - iowrite16(MAX_BUF_SIZE, ioaddr + MR_BSR); /* Read the PHY ID */ lp->switch_sig = r6040_phy_read(ioaddr, 0, 2); @@ -694,20 +722,9 @@ static void r6040_up(struct net_device *dev) else lp->phy_mode = (PHY_MODE & 0x0100) ? 0x8000:0x0; } - /* MAC Bus Control Register : - * - wait 1 host clock SDRAM bus request - * - RX FIFO : 32 bytes - * - TX FIFO : 64 bytes - * - FIFO transfer lenght : 16 bytes */ - iowrite16(MBCR_DEFAULT, ioaddr + MBCR); - /* MAC TX/RX Enable */ + /* Set duplex mode */ lp->mcr0 |= lp->phy_mode; - iowrite16(lp->mcr0, ioaddr); - - /* set interrupt waiting time and packet numbers */ - iowrite16(0x0F06, ioaddr + MT_ICR); - iowrite16(0x0F06, ioaddr + MR_ICR); /* improve performance (by RDC guys) */ r6040_phy_write(ioaddr, 30, 17, (r6040_phy_read(ioaddr, 30, 17) | 0x4000)); @@ -715,8 +732,8 @@ static void r6040_up(struct net_device *dev) r6040_phy_write(ioaddr, 0, 19, 0x0000); r6040_phy_write(ioaddr, 0, 30, 0x01F0); - /* Interrupt Mask Register */ - iowrite16(INT_MASK, ioaddr + MIER); + /* Initialize all MAC registers */ + r6040_init_mac_regs(dev); } /* |