/*
 * Open and Initialize the interface
 *
 * Set up everything, reset the card, etc..
 */
static int bfin_mac_open(struct net_device *dev)
{
	struct bfin_mac_local *lp = netdev_priv(dev);
	int retval;
	pr_debug("%s: %s\n", dev->name, __func__);

	/*
	 * Check that the address is valid.  If its not, refuse
	 * to bring the device up.  The user must specify an
	 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
	 */
	if (!is_valid_ether_addr(dev->dev_addr)) {
		printk(KERN_WARNING DRV_NAME ": no valid ethernet hw addr\n");
		return -EINVAL;
	}

	/* initial rx and tx list */
	retval = desc_list_init();

	if (retval)
		return retval;

	phy_start(lp->phydev);
	phy_write(lp->phydev, MII_BMCR, BMCR_RESET);
	setup_system_regs(dev);
	setup_mac_addr(dev->dev_addr);
	bfin_mac_disable();
	bfin_mac_enable();
	pr_debug("hardware init finished\n");
	netif_start_queue(dev);
	netif_carrier_on(dev);

	return 0;
}

static int s6gmac_open(struct net_device *dev)
{
	struct s6gmac *pd = netdev_priv(dev);
	unsigned long flags;
	phy_read_status(pd->phydev);
	spin_lock_irqsave(&pd->lock, flags);
	pd->link.mbit = 0;
	s6gmac_linkisup(dev, pd->phydev->link);
	s6gmac_init_device(dev);
	s6gmac_init_stats(dev);
	s6gmac_init_dmac(dev);
	s6gmac_rx_fillfifo(pd);
	s6dmac_enable_chan(pd->rx_dma, pd->rx_chan,
		2, 1, 0, 1, 0, 0, 0, 7, -1, 2, 0, 1);
	s6dmac_enable_chan(pd->tx_dma, pd->tx_chan,
		2, 0, 1, 0, 0, 0, 0, 7, -1, 2, 0, 1);
	writel(0 << S6_GMAC_HOST_INT_TXBURSTOVER |
		0 << S6_GMAC_HOST_INT_TXPREWOVER |
		0 << S6_GMAC_HOST_INT_RXBURSTUNDER |
		0 << S6_GMAC_HOST_INT_RXPOSTRFULL |
		0 << S6_GMAC_HOST_INT_RXPOSTRUNDER,
		pd->reg + S6_GMAC_HOST_INTMASK);
	spin_unlock_irqrestore(&pd->lock, flags);
	phy_start(pd->phydev);
	netif_start_queue(dev);
	return 0;
}

static int au1000_open(struct net_device *dev)
{
	int retval;
	struct au1000_private *aup = netdev_priv(dev);

	if (au1000_debug > 4)
		printk("%s: open: dev=%p\n", dev->name, dev);

	if ((retval = request_irq(dev->irq, &au1000_interrupt, 0,
					dev->name, dev))) {
		printk(KERN_ERR "%s: unable to get IRQ %d\n",
				dev->name, dev->irq);
		return retval;
	}

	if ((retval = au1000_init(dev))) {
		printk(KERN_ERR "%s: error in au1000_init\n", dev->name);
		free_irq(dev->irq, dev);
		return retval;
	}

	if (aup->phy_dev) {
		/* cause the PHY state machine to schedule a link state check */
		aup->phy_dev->state = PHY_CHANGELINK;
		phy_start(aup->phy_dev);
	}

	netif_start_queue(dev);

	if (au1000_debug > 4)
		printk("%s: open: Initialization done.\n", dev->name);

	return 0;
}

static int bgmac_open(struct net_device *net_dev)
{
	struct bgmac *bgmac = netdev_priv(net_dev);
	int err = 0;

	bgmac_chip_reset(bgmac);

	err = bgmac_dma_init(bgmac);
	if (err)
		return err;

	/* Specs say about reclaiming rings here, but we do that in DMA init */
	bgmac_chip_init(bgmac);

	err = request_irq(bgmac->core->irq, bgmac_interrupt, IRQF_SHARED,
			  KBUILD_MODNAME, net_dev);
	if (err < 0) {
		bgmac_err(bgmac, "IRQ request error: %d!\n", err);
		bgmac_dma_cleanup(bgmac);
		return err;
	}
	napi_enable(&bgmac->napi);

	phy_start(bgmac->phy_dev);

	netif_carrier_on(net_dev);
	return 0;
}

/*  Open the interface.
 *  The interface is opened whenever "ifconfig" actives it.
 */
static int emac_open(struct net_device *dev)
{
	struct emac_board_info *db = netdev_priv(dev);
	int ret;

	if (netif_msg_ifup(db))
		dev_dbg(db->dev, "enabling %s\n", dev->name);

	if (request_irq(dev->irq, &emac_interrupt, 0, dev->name, dev))
		return -EAGAIN;

	/* Initialize EMAC board */
	emac_reset(db);
	emac_init_device(dev);

	ret = emac_mdio_probe(dev);
	if (ret < 0) {
		free_irq(dev->irq, dev);
		netdev_err(dev, "cannot probe MDIO bus\n");
		return ret;
	}

	phy_start(dev->phydev);
	netif_start_queue(dev);

	return 0;
}

static int fs_enet_open(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	int r;
	int err;

	if (fep->fpi->use_napi)
		napi_enable(&fep->napi);

	/* Install our interrupt handler. */
	r = fs_request_irq(dev, fep->interrupt, "fs_enet-mac", fs_enet_interrupt);
	if (r != 0) {
		printk(KERN_ERR DRV_MODULE_NAME
		       ": %s Could not allocate FS_ENET IRQ!", dev->name);
		if (fep->fpi->use_napi)
			napi_disable(&fep->napi);
		return -EINVAL;
	}

	err = fs_init_phy(dev);
	if (err) {
		if (fep->fpi->use_napi)
			napi_disable(&fep->napi);
		return err;
	}
	phy_start(fep->phydev);

	return 0;
}

/**
 * phylink_start() - start a phylink instance
 * @pl: a pointer to a &struct phylink returned from phylink_create()
 *
 * Start the phylink instance specified by @pl, configuring the MAC for the
 * desired link mode(s) and negotiation style. This should be called from the
 * network device driver's &struct net_device_ops ndo_open() method.
 */
void phylink_start(struct phylink *pl)
{
	ASSERT_RTNL();

	netdev_info(pl->netdev, "configuring for %s/%s link mode\n",
		    phylink_an_mode_str(pl->link_an_mode),
		    phy_modes(pl->link_config.interface));

	/* Always set the carrier off */
	netif_carrier_off(pl->netdev);

	/* Apply the link configuration to the MAC when starting. This allows
	 * a fixed-link to start with the correct parameters, and also
	 * ensures that we set the appropriate advertisement for Serdes links.
	 */
	phylink_resolve_flow(pl, &pl->link_config);
	phylink_mac_config(pl, &pl->link_config);

	/* Restart autonegotiation if using 802.3z to ensure that the link
	 * parameters are properly negotiated.  This is necessary for DSA
	 * switches using 802.3z negotiation to ensure they see our modes.
	 */
	phylink_mac_an_restart(pl);

	clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
	phylink_run_resolve(pl);

	if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio))
		mod_timer(&pl->link_poll, jiffies + HZ);
	if (pl->sfp_bus)
		sfp_upstream_start(pl->sfp_bus);
	if (pl->phydev)
		phy_start(pl->phydev);
}

static int hip04_mac_open(struct net_device *ndev)
{
    struct hip04_priv *priv = netdev_priv(ndev);
    int i;

    priv->rx_head = 0;
    priv->tx_head = 0;
    priv->tx_tail = 0;
    hip04_reset_ppe(priv);

    for (i = 0; i < RX_DESC_NUM; i++) {
        dma_addr_t phys;

        phys = dma_map_single(&ndev->dev, priv->rx_buf[i],
                              RX_BUF_SIZE, DMA_FROM_DEVICE);
        if (dma_mapping_error(&ndev->dev, phys))
            return -EIO;

        priv->rx_phys[i] = phys;
        hip04_set_recv_desc(priv, phys);
    }

    if (priv->phy)
        phy_start(priv->phy);

    netdev_reset_queue(ndev);
    netif_start_queue(ndev);
    hip04_mac_enable(ndev);
    napi_enable(&priv->napi);

    return 0;
}

/* Open the ethernet interface */
static int at91ether_open(struct net_device *dev)
{
	struct macb *lp = netdev_priv(dev);
	u32 ctl;
	int ret;

	/* Clear internal statistics */
	ctl = macb_readl(lp, NCR);
	macb_writel(lp, NCR, ctl | MACB_BIT(CLRSTAT));

	macb_set_hwaddr(lp);

	ret = at91ether_start(dev);
	if (ret)
		return ret;

	/* Enable MAC interrupts */
	macb_writel(lp, IER, MACB_BIT(RCOMP)	|
			     MACB_BIT(RXUBR)	|
			     MACB_BIT(ISR_TUND)	|
			     MACB_BIT(ISR_RLE)	|
			     MACB_BIT(TCOMP)	|
			     MACB_BIT(ISR_ROVR)	|
			     MACB_BIT(HRESP));

	/* schedule a link state check */
	phy_start(lp->phy_dev);

	netif_start_queue(dev);

	return 0;
}

int bgmac_enet_resume(struct bgmac *bgmac)
{
	int rc;

	if (!netif_running(bgmac->net_dev))
		return 0;

	rc = bgmac_dma_init(bgmac);
	if (rc)
		return rc;

	bgmac_chip_init(bgmac);

	napi_enable(&bgmac->napi);

	netif_tx_lock(bgmac->net_dev);
	netif_device_attach(bgmac->net_dev);
	netif_tx_unlock(bgmac->net_dev);

	netif_start_queue(bgmac->net_dev);

	phy_start(bgmac->net_dev->phydev);

	return 0;
}

static void sfp_sm_probe_phy(struct sfp *sfp)
{
	struct phy_device *phy;
	int err;

	msleep(T_PHY_RESET_MS);

	phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR);
	if (IS_ERR(phy)) {
		dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy));
		return;
	}
	if (!phy) {
		dev_info(sfp->dev, "no PHY detected\n");
		return;
	}

	err = sfp_add_phy(sfp->sfp_bus, phy);
	if (err) {
		phy_device_remove(phy);
		phy_device_free(phy);
		dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err);
		return;
	}

	sfp->mod_phy = phy;
	phy_start(phy);
}

static int dsa_slave_open(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct net_device *master = p->parent->dst->master_netdev;
	struct dsa_switch *ds = p->parent;
	u8 stp_state = dsa_port_is_bridged(p) ?
			BR_STATE_BLOCKING : BR_STATE_FORWARDING;
	int err;

	if (!(master->flags & IFF_UP))
		return -ENETDOWN;

	if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
		err = dev_uc_add(master, dev->dev_addr);
		if (err < 0)
			goto out;
	}

	if (dev->flags & IFF_ALLMULTI) {
		err = dev_set_allmulti(master, 1);
		if (err < 0)
			goto del_unicast;
	}
	if (dev->flags & IFF_PROMISC) {
		err = dev_set_promiscuity(master, 1);
		if (err < 0)
			goto clear_allmulti;
	}

	if (ds->drv->port_enable) {
		err = ds->drv->port_enable(ds, p->port, p->phy);
		if (err)
			goto clear_promisc;
	}

	if (ds->drv->port_stp_update)
		ds->drv->port_stp_update(ds, p->port, stp_state);

	if (p->phy)
		phy_start(p->phy);

	return 0;

clear_promisc:
	if (dev->flags & IFF_PROMISC)
		dev_set_promiscuity(master, -1);
clear_allmulti:
	if (dev->flags & IFF_ALLMULTI)
		dev_set_allmulti(master, -1);
del_unicast:
	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
		dev_uc_del(master, dev->dev_addr);
out:
	return err;
}

int dsa_slave_resume(struct net_device *slave_dev)
{
	struct dsa_slave_priv *p = netdev_priv(slave_dev);

	netif_device_attach(slave_dev);

	if (p->phy) {
		phy_resume(p->phy);
		phy_start(p->phy);
	}

	return 0;
}

void ag71xx_phy_start(struct ag71xx *ag)
{
	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);

	if (ag->phy_dev) {
		phy_start(ag->phy_dev);
	} else if (pdata->mii_bus_dev && pdata->switch_data) {
		ag71xx_ar7240_start(ag);
	} else {
		ag->link = 1;
		ag71xx_link_adjust(ag);
	}
}

void ag71xx_phy_start(struct ag71xx *ag)
{
	if (ag->phy_dev) {
		phy_start(ag->phy_dev);
	} else {
		struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);

		ag->duplex = pdata->duplex;
		ag->speed = pdata->speed;
		ag->link = 1;
		ag71xx_phy_link_update(ag);
	}
}

/* Init RDC MAC */
static int pci_eth_up(struct net_device *dev)
{
	struct pci_eth_private *priv = netdev_priv(dev);
	void __iomem *ioaddr = dev->base_addr;
	int ret;

	/* TODO: Initialise and alloc RX/TX buffers */

	/* TODO: Initialize all MAC registers */

	phy_start(priv->phydev);

	return 0;
}

static void
ramips_phy_start(struct raeth_priv *re)
{
	unsigned long flags;

	if (re->phy_dev) {
		phy_start(re->phy_dev);
	} else {
		spin_lock_irqsave(&re->phy_lock, flags);
		re->link = 1;
		ramips_link_adjust(re);
		spin_unlock_irqrestore(&re->phy_lock, flags);
	}
}

static void fs_timeout(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	unsigned long flags;
	int wake = 0;

	fep->stats.tx_errors++;

	spin_lock_irqsave(&fep->lock, flags);

	if (dev->flags & IFF_UP) {
		phy_stop(fep->phydev);
		(*fep->ops->stop)(dev);
		(*fep->ops->restart)(dev);
		phy_start(fep->phydev);
	}

	phy_start(fep->phydev);
	wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
	spin_unlock_irqrestore(&fep->lock, flags);

	if (wake)
		netif_wake_queue(dev);
}

/* PHY control start function */
static int sh_eth_phy_start(struct net_device *ndev)
{
    struct sh_eth_private *mdp = netdev_priv(ndev);
    int ret;

    ret = sh_eth_phy_init(ndev);
    if (ret)
        return ret;

    /* reset phy - this also wakes it from PDOWN */
    phy_write(mdp->phydev, MII_BMCR, BMCR_RESET);
    phy_start(mdp->phydev);

    return 0;
}

static int
mvphy_start(phy_handle_t *ph)
{
	int rv;

	rv = phy_start(ph);
	/*
	 * If not autonegotiating, then we need to reset the PHY according to
	 * Marvell.  I don't think this is according to the spec.  Apparently
	 * the register states are not lost during this.
	 */
	if ((rv == 0) && (!ph->phy_adv_aneg)) {
		rv = ph->phy_reset(ph);
	}
	return (rv);
}