pnic.c

Go to the documentation of this file.

/*
    drivers/net/ethernet/dec/tulip/pnic.c

    Copyright 2000,2001  The Linux Kernel Team
    Written/copyright 1994-2001 by Donald Becker.

    This software may be used and distributed according to the terms
    of the GNU General Public License, incorporated herein by reference.

    Please submit bugs to http://bugzilla.kernel.org/ .
*/

#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include "tulip.h"


void pnic_do_nway(struct net_device *dev)
{
    struct tulip_private *tp = netdev_priv(dev);
    void __iomem *ioaddr = tp->base_addr;
    u32 phy_reg = ioread32(ioaddr + 0xB8);
    u32 new_csr6 = tp->csr6 & ~0x40C40200;

    if (phy_reg & 0x78000000) { /* Ignore baseT4 */
        if (phy_reg & 0x20000000)       dev->if_port = 5;
        else if (phy_reg & 0x40000000)  dev->if_port = 3;
        else if (phy_reg & 0x10000000)  dev->if_port = 4;
        else if (phy_reg & 0x08000000)  dev->if_port = 0;
        tp->nwayset = 1;
        new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000;
        iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12);
        if (dev->if_port & 1)
            iowrite32(0x1F868, ioaddr + 0xB8);
        if (phy_reg & 0x30000000) {
            tp->full_duplex = 1;
            new_csr6 |= 0x00000200;
        }
        if (tulip_debug > 1)
            netdev_dbg(dev, "PNIC autonegotiated status %08x, %s\n",
                   phy_reg, medianame[dev->if_port]);
        if (tp->csr6 != new_csr6) {
            tp->csr6 = new_csr6;
            /* Restart Tx */
            tulip_restart_rxtx(tp);
            dev->trans_start = jiffies;
        }
    }
}

void pnic_lnk_change(struct net_device *dev, int csr5)
{
    struct tulip_private *tp = netdev_priv(dev);
    void __iomem *ioaddr = tp->base_addr;
    int phy_reg = ioread32(ioaddr + 0xB8);

    if (tulip_debug > 1)
        netdev_dbg(dev, "PNIC link changed state %08x, CSR5 %08x\n",
               phy_reg, csr5);
    if (ioread32(ioaddr + CSR5) & TPLnkFail) {
        iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);
        /* If we use an external MII, then we mustn't use the
         * internal negotiation.
         */
        if (tulip_media_cap[dev->if_port] & MediaIsMII)
            return;
        if (! tp->nwayset || time_after(jiffies, dev_trans_start(dev) + 1*HZ)) {
            tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
            iowrite32(tp->csr6, ioaddr + CSR6);
            iowrite32(0x30, ioaddr + CSR12);
            iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */
            dev->trans_start = jiffies;
        }
    } else if (ioread32(ioaddr + CSR5) & TPLnkPass) {
        if (tulip_media_cap[dev->if_port] & MediaIsMII) {
            spin_lock(&tp->lock);
            tulip_check_duplex(dev);
            spin_unlock(&tp->lock);
        } else {
            pnic_do_nway(dev);
        }
        iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
    }
}

void pnic_timer(unsigned long data)
{
    struct net_device *dev = (struct net_device *)data;
    struct tulip_private *tp = netdev_priv(dev);
    void __iomem *ioaddr = tp->base_addr;
    int next_tick = 60*HZ;

    if(!ioread32(ioaddr + CSR7)) {
        /* the timer was called due to a work overflow
         * in the interrupt handler. Skip the connection
         * checks, the nic is definitively speaking with
         * his link partner.
         */
        goto too_good_connection;
    }

    if (tulip_media_cap[dev->if_port] & MediaIsMII) {
        spin_lock_irq(&tp->lock);
        if (tulip_check_duplex(dev) > 0)
            next_tick = 3*HZ;
        spin_unlock_irq(&tp->lock);
    } else {
        int csr12 = ioread32(ioaddr + CSR12);
        int new_csr6 = tp->csr6 & ~0x40C40200;
        int phy_reg = ioread32(ioaddr + 0xB8);
        int csr5 = ioread32(ioaddr + CSR5);

        if (tulip_debug > 1)
            netdev_dbg(dev, "PNIC timer PHY status %08x, %s CSR5 %08x\n",
                   phy_reg, medianame[dev->if_port], csr5);
        if (phy_reg & 0x04000000) { /* Remote link fault */
            iowrite32(0x0201F078, ioaddr + 0xB8);
            next_tick = 1*HZ;
            tp->nwayset = 0;
        } else if (phy_reg & 0x78000000) { /* Ignore baseT4 */
            pnic_do_nway(dev);
            next_tick = 60*HZ;
        } else if (csr5 & TPLnkFail) { /* 100baseTx link beat */
            if (tulip_debug > 1)
                netdev_dbg(dev, "%s link beat failed, CSR12 %04x, CSR5 %08x, PHY %03x\n",
                       medianame[dev->if_port],
                       csr12,
                       ioread32(ioaddr + CSR5),
                       ioread32(ioaddr + 0xB8));
            next_tick = 3*HZ;
            if (tp->medialock) {
            } else if (tp->nwayset  &&  (dev->if_port & 1)) {
                next_tick = 1*HZ;
            } else if (dev->if_port == 0) {
                dev->if_port = 3;
                iowrite32(0x33, ioaddr + CSR12);
                new_csr6 = 0x01860000;
                iowrite32(0x1F868, ioaddr + 0xB8);
            } else {
                dev->if_port = 0;
                iowrite32(0x32, ioaddr + CSR12);
                new_csr6 = 0x00420000;
                iowrite32(0x1F078, ioaddr + 0xB8);
            }
            if (tp->csr6 != new_csr6) {
                tp->csr6 = new_csr6;
                /* Restart Tx */
                tulip_restart_rxtx(tp);
                dev->trans_start = jiffies;
                if (tulip_debug > 1)
                    dev_info(&dev->dev,
                         "Changing PNIC configuration to %s %s-duplex, CSR6 %08x\n",
                         medianame[dev->if_port],
                         tp->full_duplex ? "full" : "half",
                         new_csr6);
            }
        }
    }
too_good_connection:
    mod_timer(&tp->timer, RUN_AT(next_tick));
    if(!ioread32(ioaddr + CSR7)) {
        if (tulip_debug > 1)
            dev_info(&dev->dev, "sw timer wakeup\n");
        disable_irq(dev->irq);
        tulip_refill_rx(dev);
        enable_irq(dev->irq);
        iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);
    }
}