timer.c

Go to the documentation of this file.

/*
    drivers/net/ethernet/dec/tulip/timer.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 "tulip.h"


void tulip_media_task(struct work_struct *work)
{
    struct tulip_private *tp =
        container_of(work, struct tulip_private, media_work);
    struct net_device *dev = tp->dev;
    void __iomem *ioaddr = tp->base_addr;
    u32 csr12 = ioread32(ioaddr + CSR12);
    int next_tick = 2*HZ;
    unsigned long flags;

    if (tulip_debug > 2) {
        netdev_dbg(dev, "Media selection tick, %s, status %08x mode %08x SIA %08x %08x %08x %08x\n",
               medianame[dev->if_port],
               ioread32(ioaddr + CSR5), ioread32(ioaddr + CSR6),
               csr12, ioread32(ioaddr + CSR13),
               ioread32(ioaddr + CSR14), ioread32(ioaddr + CSR15));
    }
    switch (tp->chip_id) {
    case DC21140:
    case DC21142:
    case MX98713:
    case COMPEX9881:
    case DM910X:
    default: {
        struct medialeaf *mleaf;
        unsigned char *p;
        if (tp->mtable == NULL) {   /* No EEPROM info, use generic code. */
            /* Not much that can be done.
               Assume this a generic MII or SYM transceiver. */
            next_tick = 60*HZ;
            if (tulip_debug > 2)
                netdev_dbg(dev, "network media monitor CSR6 %08x CSR12 0x%02x\n",
                       ioread32(ioaddr + CSR6),
                       csr12 & 0xff);
            break;
        }
        mleaf = &tp->mtable->mleaf[tp->cur_index];
        p = mleaf->leafdata;
        switch (mleaf->type) {
        case 0: case 4: {
            /* Type 0 serial or 4 SYM transceiver.  Check the link beat bit. */
            int offset = mleaf->type == 4 ? 5 : 2;
            s8 bitnum = p[offset];
            if (p[offset+1] & 0x80) {
                if (tulip_debug > 1)
                    netdev_dbg(dev, "Transceiver monitor tick CSR12=%#02x, no media sense\n",
                           csr12);
                if (mleaf->type == 4) {
                    if (mleaf->media == 3 && (csr12 & 0x02))
                        goto select_next_media;
                }
                break;
            }
            if (tulip_debug > 2)
                netdev_dbg(dev, "Transceiver monitor tick: CSR12=%#02x bit %d is %d, expecting %d\n",
                       csr12, (bitnum >> 1) & 7,
                       (csr12 & (1 << ((bitnum >> 1) & 7))) != 0,
                       (bitnum >= 0));
            /* Check that the specified bit has the proper value. */
            if ((bitnum < 0) !=
                ((csr12 & (1 << ((bitnum >> 1) & 7))) != 0)) {
                if (tulip_debug > 2)
                    netdev_dbg(dev, "Link beat detected for %s\n",
                           medianame[mleaf->media & MEDIA_MASK]);
                if ((p[2] & 0x61) == 0x01)  /* Bogus Znyx board. */
                    goto actually_mii;
                netif_carrier_on(dev);
                break;
            }
            netif_carrier_off(dev);
            if (tp->medialock)
                break;
      select_next_media:
            if (--tp->cur_index < 0) {
                /* We start again, but should instead look for default. */
                tp->cur_index = tp->mtable->leafcount - 1;
            }
            dev->if_port = tp->mtable->mleaf[tp->cur_index].media;
            if (tulip_media_cap[dev->if_port] & MediaIsFD)
                goto select_next_media; /* Skip FD entries. */
            if (tulip_debug > 1)
                netdev_dbg(dev, "No link beat on media %s, trying transceiver type %s\n",
                       medianame[mleaf->media & MEDIA_MASK],
                       medianame[tp->mtable->mleaf[tp->cur_index].media]);
            tulip_select_media(dev, 0);
            /* Restart the transmit process. */
            tulip_restart_rxtx(tp);
            next_tick = (24*HZ)/10;
            break;
        }
        case 1:  case 3:        /* 21140, 21142 MII */
        actually_mii:
            if (tulip_check_duplex(dev) < 0) {
                netif_carrier_off(dev);
                next_tick = 3*HZ;
            } else {
                netif_carrier_on(dev);
                next_tick = 60*HZ;
            }
            break;
        case 2:                 /* 21142 serial block has no link beat. */
        default:
            break;
        }
    }
    break;
    }


    spin_lock_irqsave(&tp->lock, flags);
    if (tp->timeout_recovery) {
        tulip_tx_timeout_complete(tp, ioaddr);
        tp->timeout_recovery = 0;
    }
    spin_unlock_irqrestore(&tp->lock, flags);

    /* mod_timer synchronizes us with potential add_timer calls
     * from interrupts.
     */
    mod_timer(&tp->timer, RUN_AT(next_tick));
}


void mxic_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 (tulip_debug > 3) {
        dev_info(&dev->dev, "MXIC negotiation status %08x\n",
             ioread32(ioaddr + CSR12));
    }
    if (next_tick) {
        mod_timer(&tp->timer, RUN_AT(next_tick));
    }
}


void comet_timer(unsigned long data)
{
    struct net_device *dev = (struct net_device *)data;
    struct tulip_private *tp = netdev_priv(dev);
    int next_tick = 60*HZ;

    if (tulip_debug > 1)
        netdev_dbg(dev, "Comet link status %04x partner capability %04x\n",
               tulip_mdio_read(dev, tp->phys[0], 1),
               tulip_mdio_read(dev, tp->phys[0], 5));
    /* mod_timer synchronizes us with potential add_timer calls
     * from interrupts.
     */
    if (tulip_check_duplex(dev) < 0)
        { netif_carrier_off(dev); }
    else
        { netif_carrier_on(dev); }
    mod_timer(&tp->timer, RUN_AT(next_tick));
}