bcm63xx_enet.c

				 DMA_FROM_DEVICE);
		kfree_skb(priv->rx_skb[i]);
	}
	kfree(priv->rx_skb);

out_free_tx_skb:
	kfree(priv->tx_skb);

out_free_tx_ring:
	dma_free_coherent(kdev, priv->tx_desc_alloc_size,
			  priv->tx_desc_cpu, priv->tx_desc_dma);

out_free_rx_ring:
	dma_free_coherent(kdev, priv->rx_desc_alloc_size,
			  priv->rx_desc_cpu, priv->rx_desc_dma);

out_freeirq_tx:
	free_irq(priv->irq_tx, dev);

out_freeirq_rx:
	free_irq(priv->irq_rx, dev);

out_freeirq:
	free_irq(dev->irq, dev);

out_phy_disconnect:
	phy_disconnect(priv->phydev);

	return ret;
}

/*
 * disable mac
 */
static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
{
	int limit;
	u32 val;

	val = enet_readl(priv, ENET_CTL_REG);
	val |= ENET_CTL_DISABLE_MASK;
	enet_writel(priv, val, ENET_CTL_REG);

	limit = 1000;
	do {
		u32 val;

		val = enet_readl(priv, ENET_CTL_REG);
		if (!(val & ENET_CTL_DISABLE_MASK))
			break;
		udelay(1);
	} while (limit--);
}

/*
 * disable dma in given channel
 */
static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
{
	int limit;

	enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));

	limit = 1000;
	do {
		u32 val;

		val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
		if (!(val & ENETDMA_CHANCFG_EN_MASK))
			break;
		udelay(1);
	} while (limit--);
}

/*
 * stop callback
 */
static int bcm_enet_stop(struct net_device *dev)
{
	struct bcm_enet_priv *priv;
	struct device *kdev;
	int i;

	priv = netdev_priv(dev);
	kdev = &priv->pdev->dev;

	netif_stop_queue(dev);
	napi_disable(&priv->napi);
	if (priv->has_phy)
		phy_stop(priv->phydev);
	del_timer_sync(&priv->rx_timeout);

	/* mask all interrupts */
	enet_writel(priv, 0, ENET_IRMASK_REG);
	enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
	enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));

	/* make sure no mib update is scheduled */
	flush_scheduled_work();

	/* disable dma & mac */
	bcm_enet_disable_dma(priv, priv->tx_chan);
	bcm_enet_disable_dma(priv, priv->rx_chan);
	bcm_enet_disable_mac(priv);

	/* force reclaim of all tx buffers */
	bcm_enet_tx_reclaim(dev, 1);

	/* free the rx skb ring */
	for (i = 0; i < priv->rx_ring_size; i++) {
		struct bcm_enet_desc *desc;

		if (!priv->rx_skb[i])
			continue;

		desc = &priv->rx_desc_cpu[i];
		dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
				 DMA_FROM_DEVICE);
		kfree_skb(priv->rx_skb[i]);
	}

	/* free remaining allocated memory */
	kfree(priv->rx_skb);
	kfree(priv->tx_skb);
	dma_free_coherent(kdev, priv->rx_desc_alloc_size,
			  priv->rx_desc_cpu, priv->rx_desc_dma);
	dma_free_coherent(kdev, priv->tx_desc_alloc_size,
			  priv->tx_desc_cpu, priv->tx_desc_dma);
	free_irq(priv->irq_tx, dev);
	free_irq(priv->irq_rx, dev);
	free_irq(dev->irq, dev);

	/* release phy */
	if (priv->has_phy) {
		phy_disconnect(priv->phydev);
		priv->phydev = NULL;
	}

	return 0;
}

/*
 * core request to return device rx/tx stats
 */
static struct net_device_stats *bcm_enet_get_stats(struct net_device *dev)
{
	struct bcm_enet_priv *priv;

	priv = netdev_priv(dev);
	return &priv->stats;
}

/*
 * ethtool callbacks
 */
struct bcm_enet_stats {
	char stat_string[ETH_GSTRING_LEN];
	int sizeof_stat;
	int stat_offset;
	int mib_reg;
};

#define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m),		\
		     offsetof(struct bcm_enet_priv, m)

static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
	{ "rx_packets", GEN_STAT(stats.rx_packets), -1 },
	{ "tx_packets",	GEN_STAT(stats.tx_packets), -1 },
	{ "rx_bytes", GEN_STAT(stats.rx_bytes), -1 },
	{ "tx_bytes", GEN_STAT(stats.tx_bytes), -1 },
	{ "rx_errors", GEN_STAT(stats.rx_errors), -1 },
	{ "tx_errors", GEN_STAT(stats.tx_errors), -1 },
	{ "rx_dropped",	GEN_STAT(stats.rx_dropped), -1 },
	{ "tx_dropped",	GEN_STAT(stats.tx_dropped), -1 },

	{ "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
	{ "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
	{ "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
	{ "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
	{ "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
	{ "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
	{ "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
	{ "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
	{ "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
	{ "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
	{ "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
	{ "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
	{ "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
	{ "rx_dropped",	GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
	{ "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
	{ "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
	{ "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
	{ "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
	{ "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
	{ "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
	{ "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },

	{ "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
	{ "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
	{ "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
	{ "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
	{ "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
	{ "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
	{ "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
	{ "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
	{ "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
	{ "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
	{ "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
	{ "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
	{ "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
	{ "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
	{ "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
	{ "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
	{ "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
	{ "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
	{ "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
	{ "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
	{ "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
	{ "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },

};

#define BCM_ENET_STATS_LEN	\
	(sizeof(bcm_enet_gstrings_stats) / sizeof(struct bcm_enet_stats))

static const u32 unused_mib_regs[] = {
	ETH_MIB_TX_ALL_OCTETS,
	ETH_MIB_TX_ALL_PKTS,
	ETH_MIB_RX_ALL_OCTETS,
	ETH_MIB_RX_ALL_PKTS,
};


static void bcm_enet_get_drvinfo(struct net_device *netdev,
				 struct ethtool_drvinfo *drvinfo)
{
	strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
	strncpy(drvinfo->version, bcm_enet_driver_version, 32);
	strncpy(drvinfo->fw_version, "N/A", 32);
	strncpy(drvinfo->bus_info, "bcm63xx", 32);
	drvinfo->n_stats = BCM_ENET_STATS_LEN;
}

static int bcm_enet_get_sset_count(struct net_device *netdev,
					int string_set)
{
	switch (string_set) {
	case ETH_SS_STATS:
		return BCM_ENET_STATS_LEN;
	default:
		return -EINVAL;
	}
}

static void bcm_enet_get_strings(struct net_device *netdev,
				 u32 stringset, u8 *data)
{
	int i;

	switch (stringset) {
	case ETH_SS_STATS:
		for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
			memcpy(data + i * ETH_GSTRING_LEN,
			       bcm_enet_gstrings_stats[i].stat_string,
			       ETH_GSTRING_LEN);
		}
		break;
	}
}

static void update_mib_counters(struct bcm_enet_priv *priv)
{
	int i;

	for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
		const struct bcm_enet_stats *s;
		u32 val;
		char *p;

		s = &bcm_enet_gstrings_stats[i];
		if (s->mib_reg == -1)
			continue;

		val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
		p = (char *)priv + s->stat_offset;

		if (s->sizeof_stat == sizeof(u64))
			*(u64 *)p += val;
		else
			*(u32 *)p += val;
	}

	/* also empty unused mib counters to make sure mib counter
	 * overflow interrupt is cleared */
	for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
		(void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
}

static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
{
	struct bcm_enet_priv *priv;

	priv = container_of(t, struct bcm_enet_priv, mib_update_task);
	mutex_lock(&priv->mib_update_lock);
	update_mib_counters(priv);
	mutex_unlock(&priv->mib_update_lock);

	/* reenable mib interrupt */
	if (netif_running(priv->net_dev))
		enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
}

static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
				       struct ethtool_stats *stats,
				       u64 *data)
{
	struct bcm_enet_priv *priv;
	int i;

	priv = netdev_priv(netdev);

	mutex_lock(&priv->mib_update_lock);
	update_mib_counters(priv);

	for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
		const struct bcm_enet_stats *s;
		char *p;

		s = &bcm_enet_gstrings_stats[i];
		p = (char *)priv + s->stat_offset;
		data[i] = (s->sizeof_stat == sizeof(u64)) ?
			*(u64 *)p : *(u32 *)p;
	}
	mutex_unlock(&priv->mib_update_lock);
}

static int bcm_enet_get_settings(struct net_device *dev,
				 struct ethtool_cmd *cmd)
{
	struct bcm_enet_priv *priv;

	priv = netdev_priv(dev);

	cmd->maxrxpkt = 0;
	cmd->maxtxpkt = 0;

	if (priv->has_phy) {
		if (!priv->phydev)
			return -ENODEV;
		return phy_ethtool_gset(priv->phydev, cmd);
	} else {
		cmd->autoneg = 0;
		cmd->speed = (priv->force_speed_100) ? SPEED_100 : SPEED_10;
		cmd->duplex = (priv->force_duplex_full) ?
			DUPLEX_FULL : DUPLEX_HALF;
		cmd->supported = ADVERTISED_10baseT_Half  |
			ADVERTISED_10baseT_Full |
			ADVERTISED_100baseT_Half |
			ADVERTISED_100baseT_Full;
		cmd->advertising = 0;
		cmd->port = PORT_MII;
		cmd->transceiver = XCVR_EXTERNAL;
	}
	return 0;
}

static int bcm_enet_set_settings(struct net_device *dev,
				 struct ethtool_cmd *cmd)
{
	struct bcm_enet_priv *priv;

	priv = netdev_priv(dev);
	if (priv->has_phy) {
		if (!priv->phydev)
			return -ENODEV;
		return phy_ethtool_sset(priv->phydev, cmd);
	} else {

		if (cmd->autoneg ||
		    (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
		    cmd->port != PORT_MII)
			return -EINVAL;

		priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
		priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;

		if (netif_running(dev))
			bcm_enet_adjust_link(dev);
		return 0;
	}
}

static void bcm_enet_get_ringparam(struct net_device *dev,
				   struct ethtool_ringparam *ering)
{
	struct bcm_enet_priv *priv;

	priv = netdev_priv(dev);

	/* rx/tx ring is actually only limited by memory */
	ering->rx_max_pending = 8192;
	ering->tx_max_pending = 8192;
	ering->rx_mini_max_pending = 0;
	ering->rx_jumbo_max_pending = 0;
	ering->rx_pending = priv->rx_ring_size;
	ering->tx_pending = priv->tx_ring_size;
}

static int bcm_enet_set_ringparam(struct net_device *dev,
				  struct ethtool_ringparam *ering)
{
	struct bcm_enet_priv *priv;
	int was_running;

	priv = netdev_priv(dev);

	was_running = 0;
	if (netif_running(dev)) {
		bcm_enet_stop(dev);
		was_running = 1;
	}

	priv->rx_ring_size = ering->rx_pending;
	priv->tx_ring_size = ering->tx_pending;

	if (was_running) {
		int err;

		err = bcm_enet_open(dev);
		if (err)
			dev_close(dev);
		else
			bcm_enet_set_multicast_list(dev);
	}
	return 0;
}

static void bcm_enet_get_pauseparam(struct net_device *dev,
				    struct ethtool_pauseparam *ecmd)
{
	struct bcm_enet_priv *priv;

	priv = netdev_priv(dev);
	ecmd->autoneg = priv->pause_auto;
	ecmd->rx_pause = priv->pause_rx;
	ecmd->tx_pause = priv->pause_tx;
}

static int bcm_enet_set_pauseparam(struct net_device *dev,
				   struct ethtool_pauseparam *ecmd)
{
	struct bcm_enet_priv *priv;

	priv = netdev_priv(dev);

	if (priv->has_phy) {
		if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
			/* asymetric pause mode not supported,
			 * actually possible but integrated PHY has RO
			 * asym_pause bit */
			return -EINVAL;
		}
	} else {
		/* no pause autoneg on direct mii connection */
		if (ecmd->autoneg)
			return -EINVAL;
	}

	priv->pause_auto = ecmd->autoneg;
	priv->pause_rx = ecmd->rx_pause;
	priv->pause_tx = ecmd->tx_pause;

	return 0;
}

static struct ethtool_ops bcm_enet_ethtool_ops = {
	.get_strings		= bcm_enet_get_strings,
	.get_sset_count		= bcm_enet_get_sset_count,
	.get_ethtool_stats      = bcm_enet_get_ethtool_stats,
	.get_settings		= bcm_enet_get_settings,
	.set_settings		= bcm_enet_set_settings,
	.get_drvinfo		= bcm_enet_get_drvinfo,
	.get_link		= ethtool_op_get_link,
	.get_ringparam		= bcm_enet_get_ringparam,
	.set_ringparam		= bcm_enet_set_ringparam,
	.get_pauseparam		= bcm_enet_get_pauseparam,
	.set_pauseparam		= bcm_enet_set_pauseparam,
};

static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct bcm_enet_priv *priv;

	priv = netdev_priv(dev);
	if (priv->has_phy) {
		if (!priv->phydev)
			return -ENODEV;
		return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
	} else {
		struct mii_if_info mii;

		mii.dev = dev;
		mii.mdio_read = bcm_enet_mdio_read_mii;
		mii.mdio_write = bcm_enet_mdio_write_mii;
		mii.phy_id = 0;
		mii.phy_id_mask = 0x3f;
		mii.reg_num_mask = 0x1f;
		return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
	}
}

/*
 * calculate actual hardware mtu
 */
static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
{
	int actual_mtu;

	actual_mtu = mtu;

	/* add ethernet header + vlan tag size */
	actual_mtu += VLAN_ETH_HLEN;

	if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
		return -EINVAL;

	/*
	 * setup maximum size before we get overflow mark in
	 * descriptor, note that this will not prevent reception of
	 * big frames, they will be split into multiple buffers
	 * anyway
	 */
	priv->hw_mtu = actual_mtu;

	/*
	 * align rx buffer size to dma burst len, account FCS since
	 * it's appended
	 */
	priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
				  BCMENET_DMA_MAXBURST * 4);
	return 0;
}

/*
 * adjust mtu, can't be called while device is running
 */
static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
{
	int ret;

	if (netif_running(dev))
		return -EBUSY;

	ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
	if (ret)
		return ret;
	dev->mtu = new_mtu;
	return 0;
}

/*
 * preinit hardware to allow mii operation while device is down
 */
static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
{
	u32 val;
	int limit;

	/* make sure mac is disabled */
	bcm_enet_disable_mac(priv);

	/* soft reset mac */
	val = ENET_CTL_SRESET_MASK;
	enet_writel(priv, val, ENET_CTL_REG);
	wmb();

	limit = 1000;
	do {
		val = enet_readl(priv, ENET_CTL_REG);
		if (!(val & ENET_CTL_SRESET_MASK))
			break;
		udelay(1);
	} while (limit--);

	/* select correct mii interface */
	val = enet_readl(priv, ENET_CTL_REG);
	if (priv->use_external_mii)
		val |= ENET_CTL_EPHYSEL_MASK;
	else
		val &= ~ENET_CTL_EPHYSEL_MASK;
	enet_writel(priv, val, ENET_CTL_REG);

	/* turn on mdc clock */
	enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
		    ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);

	/* set mib counters to self-clear when read */
	val = enet_readl(priv, ENET_MIBCTL_REG);
	val |= ENET_MIBCTL_RDCLEAR_MASK;
	enet_writel(priv, val, ENET_MIBCTL_REG);
}

static const struct net_device_ops bcm_enet_ops = {
	.ndo_open		= bcm_enet_open,
	.ndo_stop		= bcm_enet_stop,
	.ndo_start_xmit		= bcm_enet_start_xmit,
	.ndo_get_stats		= bcm_enet_get_stats,
	.ndo_set_mac_address	= bcm_enet_set_mac_address,
	.ndo_set_multicast_list = bcm_enet_set_multicast_list,
	.ndo_do_ioctl		= bcm_enet_ioctl,
	.ndo_change_mtu		= bcm_enet_change_mtu,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller = bcm_enet_netpoll,
#endif
};

/*
 * allocate netdevice, request register memory and register device.
 */
static int __devinit bcm_enet_probe(struct platform_device *pdev)
{
	struct bcm_enet_priv *priv;
	struct net_device *dev;
	struct bcm63xx_enet_platform_data *pd;
	struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
	struct mii_bus *bus;
	const char *clk_name;
	unsigned int iomem_size;
	int i, ret;

	/* stop if shared driver failed, assume driver->probe will be
	 * called in the same order we register devices (correct ?) */
	if (!bcm_enet_shared_base)
		return -ENODEV;

	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
	res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
	if (!res_mem || !res_irq || !res_irq_rx || !res_irq_tx)
		return -ENODEV;

	ret = 0;
	dev = alloc_etherdev(sizeof(*priv));
	if (!dev)
		return -ENOMEM;
	priv = netdev_priv(dev);
	memset(priv, 0, sizeof(*priv));

	ret = compute_hw_mtu(priv, dev->mtu);
	if (ret)
		goto out;

	iomem_size = res_mem->end - res_mem->start + 1;
	if (!request_mem_region(res_mem->start, iomem_size, "bcm63xx_enet")) {
		ret = -EBUSY;
		goto out;
	}

	priv->base = ioremap(res_mem->start, iomem_size);
	if (priv->base == NULL) {
		ret = -ENOMEM;
		goto out_release_mem;
	}
	dev->irq = priv->irq = res_irq->start;
	priv->irq_rx = res_irq_rx->start;
	priv->irq_tx = res_irq_tx->start;
	priv->mac_id = pdev->id;

	/* get rx & tx dma channel id for this mac */
	if (priv->mac_id == 0) {
		priv->rx_chan = 0;
		priv->tx_chan = 1;
		clk_name = "enet0";
	} else {
		priv->rx_chan = 2;
		priv->tx_chan = 3;
		clk_name = "enet1";
	}

	priv->mac_clk = clk_get(&pdev->dev, clk_name);
	if (IS_ERR(priv->mac_clk)) {
		ret = PTR_ERR(priv->mac_clk);
		goto out_unmap;
	}
	clk_enable(priv->mac_clk);

	/* initialize default and fetch platform data */
	priv->rx_ring_size = BCMENET_DEF_RX_DESC;
	priv->tx_ring_size = BCMENET_DEF_TX_DESC;

	pd = pdev->dev.platform_data;
	if (pd) {
		memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
		priv->has_phy = pd->has_phy;
		priv->phy_id = pd->phy_id;
		priv->has_phy_interrupt = pd->has_phy_interrupt;
		priv->phy_interrupt = pd->phy_interrupt;
		priv->use_external_mii = !pd->use_internal_phy;
		priv->pause_auto = pd->pause_auto;
		priv->pause_rx = pd->pause_rx;
		priv->pause_tx = pd->pause_tx;
		priv->force_duplex_full = pd->force_duplex_full;
		priv->force_speed_100 = pd->force_speed_100;
	}

	if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
		/* using internal PHY, enable clock */
		priv->phy_clk = clk_get(&pdev->dev, "ephy");
		if (IS_ERR(priv->phy_clk)) {
			ret = PTR_ERR(priv->phy_clk);
			priv->phy_clk = NULL;
			goto out_put_clk_mac;
		}
		clk_enable(priv->phy_clk);
	}

	/* do minimal hardware init to be able to probe mii bus */
	bcm_enet_hw_preinit(priv);

	/* MII bus registration */
	if (priv->has_phy) {

		priv->mii_bus = mdiobus_alloc();
		if (!priv->mii_bus) {
			ret = -ENOMEM;
			goto out_uninit_hw;
		}

		bus = priv->mii_bus;
		bus->name = "bcm63xx_enet MII bus";
		bus->parent = &pdev->dev;
		bus->priv = priv;
		bus->read = bcm_enet_mdio_read_phylib;
		bus->write = bcm_enet_mdio_write_phylib;
		sprintf(bus->id, "%d", priv->mac_id);

		/* only probe bus where we think the PHY is, because
		 * the mdio read operation return 0 instead of 0xffff
		 * if a slave is not present on hw */
		bus->phy_mask = ~(1 << priv->phy_id);

		bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
		if (!bus->irq) {
			ret = -ENOMEM;
			goto out_free_mdio;
		}

		if (priv->has_phy_interrupt)
			bus->irq[priv->phy_id] = priv->phy_interrupt;
		else
			bus->irq[priv->phy_id] = PHY_POLL;

		ret = mdiobus_register(bus);
		if (ret) {
			dev_err(&pdev->dev, "unable to register mdio bus\n");
			goto out_free_mdio;
		}
	} else {

		/* run platform code to initialize PHY device */
		if (pd->mii_config &&
		    pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
				   bcm_enet_mdio_write_mii)) {
			dev_err(&pdev->dev, "unable to configure mdio bus\n");
			goto out_uninit_hw;
		}
	}

	spin_lock_init(&priv->rx_lock);

	/* init rx timeout (used for oom) */
	init_timer(&priv->rx_timeout);
	priv->rx_timeout.function = bcm_enet_refill_rx_timer;
	priv->rx_timeout.data = (unsigned long)dev;

	/* init the mib update lock&work */
	mutex_init(&priv->mib_update_lock);
	INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);

	/* zero mib counters */
	for (i = 0; i < ENET_MIB_REG_COUNT; i++)
		enet_writel(priv, 0, ENET_MIB_REG(i));

	/* register netdevice */
	dev->netdev_ops = &bcm_enet_ops;
	netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);

	SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops);
	SET_NETDEV_DEV(dev, &pdev->dev);

	ret = register_netdev(dev);
	if (ret)
		goto out_unregister_mdio;

	netif_carrier_off(dev);
	platform_set_drvdata(pdev, dev);
	priv->pdev = pdev;
	priv->net_dev = dev;

	return 0;

out_unregister_mdio:
	if (priv->mii_bus) {
		mdiobus_unregister(priv->mii_bus);
		kfree(priv->mii_bus->irq);
	}

out_free_mdio:
	if (priv->mii_bus)
		mdiobus_free(priv->mii_bus);

out_uninit_hw:
	/* turn off mdc clock */
	enet_writel(priv, 0, ENET_MIISC_REG);
	if (priv->phy_clk) {
		clk_disable(priv->phy_clk);
		clk_put(priv->phy_clk);
	}

out_put_clk_mac:
	clk_disable(priv->mac_clk);
	clk_put(priv->mac_clk);

out_unmap:
	iounmap(priv->base);

out_release_mem:
	release_mem_region(res_mem->start, iomem_size);
out:
	free_netdev(dev);
	return ret;
}


/*
 * exit func, stops hardware and unregisters netdevice
 */
static int __devexit bcm_enet_remove(struct platform_device *pdev)
{
	struct bcm_enet_priv *priv;
	struct net_device *dev;
	struct resource *res;

	/* stop netdevice */
	dev = platform_get_drvdata(pdev);
	priv = netdev_priv(dev);
	unregister_netdev(dev);

	/* turn off mdc clock */
	enet_writel(priv, 0, ENET_MIISC_REG);

	if (priv->has_phy) {
		mdiobus_unregister(priv->mii_bus);
		kfree(priv->mii_bus->irq);
		mdiobus_free(priv->mii_bus);
	} else {
		struct bcm63xx_enet_platform_data *pd;

		pd = pdev->dev.platform_data;
		if (pd && pd->mii_config)
			pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
				       bcm_enet_mdio_write_mii);
	}

	/* release device resources */
	iounmap(priv->base);
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(res->start, res->end - res->start + 1);

	/* disable hw block clocks */
	if (priv->phy_clk) {
		clk_disable(priv->phy_clk);
		clk_put(priv->phy_clk);
	}
	clk_disable(priv->mac_clk);
	clk_put(priv->mac_clk);

	platform_set_drvdata(pdev, NULL);
	free_netdev(dev);
	return 0;
}

struct platform_driver bcm63xx_enet_driver = {
	.probe	= bcm_enet_probe,
	.remove	= __devexit_p(bcm_enet_remove),
	.driver	= {
		.name	= "bcm63xx_enet",
		.owner  = THIS_MODULE,
	},
};

/*
 * reserve & remap memory space shared between all macs
 */
static int __devinit bcm_enet_shared_probe(struct platform_device *pdev)
{
	struct resource *res;
	unsigned int iomem_size;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;

	iomem_size = res->end - res->start + 1;
	if (!request_mem_region(res->start, iomem_size, "bcm63xx_enet_dma"))
		return -EBUSY;

	bcm_enet_shared_base = ioremap(res->start, iomem_size);
	if (!bcm_enet_shared_base) {
		release_mem_region(res->start, iomem_size);
		return -ENOMEM;
	}
	return 0;
}

static int __devexit bcm_enet_shared_remove(struct platform_device *pdev)
{
	struct resource *res;

	iounmap(bcm_enet_shared_base);
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(res->start, res->end - res->start + 1);
	return 0;
}

/*
 * this "shared" driver is needed because both macs share a single
 * address space
 */
struct platform_driver bcm63xx_enet_shared_driver = {
	.probe	= bcm_enet_shared_probe,
	.remove	= __devexit_p(bcm_enet_shared_remove),
	.driver	= {
		.name	= "bcm63xx_enet_shared",
		.owner  = THIS_MODULE,
	},
};

/*
 * entry point
 */
static int __init bcm_enet_init(void)
{
	int ret;

	ret = platform_driver_register(&bcm63xx_enet_shared_driver);
	if (ret)
		return ret;

	ret = platform_driver_register(&bcm63xx_enet_driver);
	if (ret)
		platform_driver_unregister(&bcm63xx_enet_shared_driver);

	return ret;
}

static void __exit bcm_enet_exit(void)
{
	platform_driver_unregister(&bcm63xx_enet_driver);
	platform_driver_unregister(&bcm63xx_enet_shared_driver);
}


module_init(bcm_enet_init);
module_exit(bcm_enet_exit);

MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
MODULE_LICENSE("GPL");