/*
        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(struct timer_list *t)
{
        struct tulip_private *tp = timer_container_of(tp, t, timer);
        struct net_device *dev = tp->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(struct timer_list *t)
{
        struct tulip_private *tp = timer_container_of(tp, t, timer);
        struct net_device *dev = tp->dev;
        int next_tick = 2*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));
}