xilinx/ll_temac: Move the Xilinx drivers

Move the Xilinx drivers into drivers/net/ethernet/xilinx/ and
make the necessary Kconfig and Makefile changes.

CC: John Williams <john.williams@petalogix.com>
CC: "David H. Lynch Jr." <dhlii@dlasys.net>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 1154 deletions

diff --git a/drivers/net/ll_temac_main.c b/drivers/net/ll_temac_main.c
deleted file mode 100644
index 728fe414147a..000000000000
--- a/drivers/net/ll_temac_main.c
+++ /dev/null
@@ -1,1154 +0,0 @@
-/*
- * Driver for Xilinx TEMAC Ethernet device
- *
- * Copyright (c) 2008 Nissin Systems Co., Ltd.,  Yoshio Kashiwagi
- * Copyright (c) 2005-2008 DLA Systems,  David H. Lynch Jr. <dhlii@dlasys.net>
- * Copyright (c) 2008-2009 Secret Lab Technologies Ltd.
- *
- * This is a driver for the Xilinx ll_temac ipcore which is often used
- * in the Virtex and Spartan series of chips.
- *
- * Notes:
- * - The ll_temac hardware uses indirect access for many of the TEMAC
- *   registers, include the MDIO bus.  However, indirect access to MDIO
- *   registers take considerably more clock cycles than to TEMAC registers.
- *   MDIO accesses are long, so threads doing them should probably sleep
- *   rather than busywait.  However, since only one indirect access can be
- *   in progress at any given time, that means that *all* indirect accesses
- *   could end up sleeping (to wait for an MDIO access to complete).
- *   Fortunately none of the indirect accesses are on the 'hot' path for tx
- *   or rx, so this should be okay.
- *
- * TODO:
- * - Factor out locallink DMA code into separate driver
- * - Fix multicast assignment.
- * - Fix support for hardware checksumming.
- * - Testing.  Lots and lots of testing.
- *
- */
-
-#include <linux/delay.h>
-#include <linux/etherdevice.h>
-#include <linux/init.h>
-#include <linux/mii.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/netdevice.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_mdio.h>
-#include <linux/of_platform.h>
-#include <linux/of_address.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <linux/tcp.h>      /* needed for sizeof(tcphdr) */
-#include <linux/udp.h>      /* needed for sizeof(udphdr) */
-#include <linux/phy.h>
-#include <linux/in.h>
-#include <linux/io.h>
-#include <linux/ip.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-
-#include "ll_temac.h"
-
-#define TX_BD_NUM   64
-#define RX_BD_NUM   128
-
-/* ---------------------------------------------------------------------
- * Low level register access functions
- */
-
-u32 temac_ior(struct temac_local *lp, int offset)
-{
-	return in_be32((u32 *)(lp->regs + offset));
-}
-
-void temac_iow(struct temac_local *lp, int offset, u32 value)
-{
-	out_be32((u32 *) (lp->regs + offset), value);
-}
-
-int temac_indirect_busywait(struct temac_local *lp)
-{
-	long end = jiffies + 2;
-
-	while (!(temac_ior(lp, XTE_RDY0_OFFSET) & XTE_RDY0_HARD_ACS_RDY_MASK)) {
-		if (end - jiffies <= 0) {
-			WARN_ON(1);
-			return -ETIMEDOUT;
-		}
-		msleep(1);
-	}
-	return 0;
-}
-
-/**
- * temac_indirect_in32
- *
- * lp->indirect_mutex must be held when calling this function
- */
-u32 temac_indirect_in32(struct temac_local *lp, int reg)
-{
-	u32 val;
-
-	if (temac_indirect_busywait(lp))
-		return -ETIMEDOUT;
-	temac_iow(lp, XTE_CTL0_OFFSET, reg);
-	if (temac_indirect_busywait(lp))
-		return -ETIMEDOUT;
-	val = temac_ior(lp, XTE_LSW0_OFFSET);
-
-	return val;
-}
-
-/**
- * temac_indirect_out32
- *
- * lp->indirect_mutex must be held when calling this function
- */
-void temac_indirect_out32(struct temac_local *lp, int reg, u32 value)
-{
-	if (temac_indirect_busywait(lp))
-		return;
-	temac_iow(lp, XTE_LSW0_OFFSET, value);
-	temac_iow(lp, XTE_CTL0_OFFSET, CNTLREG_WRITE_ENABLE_MASK | reg);
-}
-
-/**
- * temac_dma_in32 - Memory mapped DMA read, this function expects a
- * register input that is based on DCR word addresses which
- * are then converted to memory mapped byte addresses
- */
-static u32 temac_dma_in32(struct temac_local *lp, int reg)
-{
-	return in_be32((u32 *)(lp->sdma_regs + (reg << 2)));
-}
-
-/**
- * temac_dma_out32 - Memory mapped DMA read, this function expects a
- * register input that is based on DCR word addresses which
- * are then converted to memory mapped byte addresses
- */
-static void temac_dma_out32(struct temac_local *lp, int reg, u32 value)
-{
-	out_be32((u32 *)(lp->sdma_regs + (reg << 2)), value);
-}
-
-/* DMA register access functions can be DCR based or memory mapped.
- * The PowerPC 440 is DCR based, the PowerPC 405 and MicroBlaze are both
- * memory mapped.
- */
-#ifdef CONFIG_PPC_DCR
-
-/**
- * temac_dma_dcr_in32 - DCR based DMA read
- */
-static u32 temac_dma_dcr_in(struct temac_local *lp, int reg)
-{
-	return dcr_read(lp->sdma_dcrs, reg);
-}
-
-/**
- * temac_dma_dcr_out32 - DCR based DMA write
- */
-static void temac_dma_dcr_out(struct temac_local *lp, int reg, u32 value)
-{
-	dcr_write(lp->sdma_dcrs, reg, value);
-}
-
-/**
- * temac_dcr_setup - If the DMA is DCR based, then setup the address and
- * I/O  functions
- */
-static int temac_dcr_setup(struct temac_local *lp, struct platform_device *op,
-				struct device_node *np)
-{
-	unsigned int dcrs;
-
-	/* setup the dcr address mapping if it's in the device tree */
-
-	dcrs = dcr_resource_start(np, 0);
-	if (dcrs != 0) {
-		lp->sdma_dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0));
-		lp->dma_in = temac_dma_dcr_in;
-		lp->dma_out = temac_dma_dcr_out;
-		dev_dbg(&op->dev, "DCR base: %x\n", dcrs);
-		return 0;
-	}
-	/* no DCR in the device tree, indicate a failure */
-	return -1;
-}
-
-#else
-
-/*
- * temac_dcr_setup - This is a stub for when DCR is not supported,
- * such as with MicroBlaze
- */
-static int temac_dcr_setup(struct temac_local *lp, struct platform_device *op,
-				struct device_node *np)
-{
-	return -1;
-}
-
-#endif
-
-/**
- *  * temac_dma_bd_release - Release buffer descriptor rings
- */
-static void temac_dma_bd_release(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	int i;
-
-	for (i = 0; i < RX_BD_NUM; i++) {
-		if (!lp->rx_skb[i])
-			break;
-		else {
-			dma_unmap_single(ndev->dev.parent, lp->rx_bd_v[i].phys,
-					XTE_MAX_JUMBO_FRAME_SIZE, DMA_FROM_DEVICE);
-			dev_kfree_skb(lp->rx_skb[i]);
-		}
-	}
-	if (lp->rx_bd_v)
-		dma_free_coherent(ndev->dev.parent,
-				sizeof(*lp->rx_bd_v) * RX_BD_NUM,
-				lp->rx_bd_v, lp->rx_bd_p);
-	if (lp->tx_bd_v)
-		dma_free_coherent(ndev->dev.parent,
-				sizeof(*lp->tx_bd_v) * TX_BD_NUM,
-				lp->tx_bd_v, lp->tx_bd_p);
-	if (lp->rx_skb)
-		kfree(lp->rx_skb);
-}
-
-/**
- * temac_dma_bd_init - Setup buffer descriptor rings
- */
-static int temac_dma_bd_init(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	struct sk_buff *skb;
-	int i;
-
-	lp->rx_skb = kzalloc(sizeof(*lp->rx_skb) * RX_BD_NUM, GFP_KERNEL);
-	if (!lp->rx_skb) {
-		dev_err(&ndev->dev,
-				"can't allocate memory for DMA RX buffer\n");
-		goto out;
-	}
-	/* allocate the tx and rx ring buffer descriptors. */
-	/* returns a virtual address and a physical address. */
-	lp->tx_bd_v = dma_alloc_coherent(ndev->dev.parent,
-					 sizeof(*lp->tx_bd_v) * TX_BD_NUM,
-					 &lp->tx_bd_p, GFP_KERNEL);
-	if (!lp->tx_bd_v) {
-		dev_err(&ndev->dev,
-				"unable to allocate DMA TX buffer descriptors");
-		goto out;
-	}
-	lp->rx_bd_v = dma_alloc_coherent(ndev->dev.parent,
-					 sizeof(*lp->rx_bd_v) * RX_BD_NUM,
-					 &lp->rx_bd_p, GFP_KERNEL);
-	if (!lp->rx_bd_v) {
-		dev_err(&ndev->dev,
-				"unable to allocate DMA RX buffer descriptors");
-		goto out;
-	}
-
-	memset(lp->tx_bd_v, 0, sizeof(*lp->tx_bd_v) * TX_BD_NUM);
-	for (i = 0; i < TX_BD_NUM; i++) {
-		lp->tx_bd_v[i].next = lp->tx_bd_p +
-				sizeof(*lp->tx_bd_v) * ((i + 1) % TX_BD_NUM);
-	}
-
-	memset(lp->rx_bd_v, 0, sizeof(*lp->rx_bd_v) * RX_BD_NUM);
-	for (i = 0; i < RX_BD_NUM; i++) {
-		lp->rx_bd_v[i].next = lp->rx_bd_p +
-				sizeof(*lp->rx_bd_v) * ((i + 1) % RX_BD_NUM);
-
-		skb = netdev_alloc_skb_ip_align(ndev,
-						XTE_MAX_JUMBO_FRAME_SIZE);
-
-		if (skb == 0) {
-			dev_err(&ndev->dev, "alloc_skb error %d\n", i);
-			goto out;
-		}
-		lp->rx_skb[i] = skb;
-		/* returns physical address of skb->data */
-		lp->rx_bd_v[i].phys = dma_map_single(ndev->dev.parent,
-						     skb->data,
-						     XTE_MAX_JUMBO_FRAME_SIZE,
-						     DMA_FROM_DEVICE);
-		lp->rx_bd_v[i].len = XTE_MAX_JUMBO_FRAME_SIZE;
-		lp->rx_bd_v[i].app0 = STS_CTRL_APP0_IRQONEND;
-	}
-
-	lp->dma_out(lp, TX_CHNL_CTRL, 0x10220400 |
-					  CHNL_CTRL_IRQ_EN |
-					  CHNL_CTRL_IRQ_DLY_EN |
-					  CHNL_CTRL_IRQ_COAL_EN);
-	/* 0x10220483 */
-	/* 0x00100483 */
-	lp->dma_out(lp, RX_CHNL_CTRL, 0xff070000 |
-					  CHNL_CTRL_IRQ_EN |
-					  CHNL_CTRL_IRQ_DLY_EN |
-					  CHNL_CTRL_IRQ_COAL_EN |
-					  CHNL_CTRL_IRQ_IOE);
-	/* 0xff010283 */
-
-	lp->dma_out(lp, RX_CURDESC_PTR,  lp->rx_bd_p);
-	lp->dma_out(lp, RX_TAILDESC_PTR,
-		       lp->rx_bd_p + (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1)));
-	lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p);
-
-	return 0;
-
-out:
-	temac_dma_bd_release(ndev);
-	return -ENOMEM;
-}
-
-/* ---------------------------------------------------------------------
- * net_device_ops
- */
-
-static int temac_set_mac_address(struct net_device *ndev, void *address)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-
-	if (address)
-		memcpy(ndev->dev_addr, address, ETH_ALEN);
-
-	if (!is_valid_ether_addr(ndev->dev_addr))
-		random_ether_addr(ndev->dev_addr);
-
-	/* set up unicast MAC address filter set its mac address */
-	mutex_lock(&lp->indirect_mutex);
-	temac_indirect_out32(lp, XTE_UAW0_OFFSET,
-			     (ndev->dev_addr[0]) |
-			     (ndev->dev_addr[1] << 8) |
-			     (ndev->dev_addr[2] << 16) |
-			     (ndev->dev_addr[3] << 24));
-	/* There are reserved bits in EUAW1
-	 * so don't affect them Set MAC bits [47:32] in EUAW1 */
-	temac_indirect_out32(lp, XTE_UAW1_OFFSET,
-			     (ndev->dev_addr[4] & 0x000000ff) |
-			     (ndev->dev_addr[5] << 8));
-	mutex_unlock(&lp->indirect_mutex);
-
-	return 0;
-}
-
-static int netdev_set_mac_address(struct net_device *ndev, void *p)
-{
-	struct sockaddr *addr = p;
-
-	return temac_set_mac_address(ndev, addr->sa_data);
-}
-
-static void temac_set_multicast_list(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	u32 multi_addr_msw, multi_addr_lsw, val;
-	int i;
-
-	mutex_lock(&lp->indirect_mutex);
-	if (ndev->flags & (IFF_ALLMULTI | IFF_PROMISC) ||
-	    netdev_mc_count(ndev) > MULTICAST_CAM_TABLE_NUM) {
-		/*
-		 *	We must make the kernel realise we had to move
-		 *	into promisc mode or we start all out war on
-		 *	the cable. If it was a promisc request the
-		 *	flag is already set. If not we assert it.
-		 */
-		ndev->flags |= IFF_PROMISC;
-		temac_indirect_out32(lp, XTE_AFM_OFFSET, XTE_AFM_EPPRM_MASK);
-		dev_info(&ndev->dev, "Promiscuous mode enabled.\n");
-	} else if (!netdev_mc_empty(ndev)) {
-		struct netdev_hw_addr *ha;
-
-		i = 0;
-		netdev_for_each_mc_addr(ha, ndev) {
-			if (i >= MULTICAST_CAM_TABLE_NUM)
-				break;
-			multi_addr_msw = ((ha->addr[3] << 24) |
-					  (ha->addr[2] << 16) |
-					  (ha->addr[1] << 8) |
-					  (ha->addr[0]));
-			temac_indirect_out32(lp, XTE_MAW0_OFFSET,
-					     multi_addr_msw);
-			multi_addr_lsw = ((ha->addr[5] << 8) |
-					  (ha->addr[4]) | (i << 16));
-			temac_indirect_out32(lp, XTE_MAW1_OFFSET,
-					     multi_addr_lsw);
-			i++;
-		}
-	} else {
-		val = temac_indirect_in32(lp, XTE_AFM_OFFSET);
-		temac_indirect_out32(lp, XTE_AFM_OFFSET,
-				     val & ~XTE_AFM_EPPRM_MASK);
-		temac_indirect_out32(lp, XTE_MAW0_OFFSET, 0);
-		temac_indirect_out32(lp, XTE_MAW1_OFFSET, 0);
-		dev_info(&ndev->dev, "Promiscuous mode disabled.\n");
-	}
-	mutex_unlock(&lp->indirect_mutex);
-}
-
-struct temac_option {
-	int flg;
-	u32 opt;
-	u32 reg;
-	u32 m_or;
-	u32 m_and;
-} temac_options[] = {
-	/* Turn on jumbo packet support for both Rx and Tx */
-	{
-		.opt = XTE_OPTION_JUMBO,
-		.reg = XTE_TXC_OFFSET,
-		.m_or = XTE_TXC_TXJMBO_MASK,
-	},
-	{
-		.opt = XTE_OPTION_JUMBO,
-		.reg = XTE_RXC1_OFFSET,
-		.m_or =XTE_RXC1_RXJMBO_MASK,
-	},
-	/* Turn on VLAN packet support for both Rx and Tx */
-	{
-		.opt = XTE_OPTION_VLAN,
-		.reg = XTE_TXC_OFFSET,
-		.m_or =XTE_TXC_TXVLAN_MASK,
-	},
-	{
-		.opt = XTE_OPTION_VLAN,
-		.reg = XTE_RXC1_OFFSET,
-		.m_or =XTE_RXC1_RXVLAN_MASK,
-	},
-	/* Turn on FCS stripping on receive packets */
-	{
-		.opt = XTE_OPTION_FCS_STRIP,
-		.reg = XTE_RXC1_OFFSET,
-		.m_or =XTE_RXC1_RXFCS_MASK,
-	},
-	/* Turn on FCS insertion on transmit packets */
-	{
-		.opt = XTE_OPTION_FCS_INSERT,
-		.reg = XTE_TXC_OFFSET,
-		.m_or =XTE_TXC_TXFCS_MASK,
-	},
-	/* Turn on length/type field checking on receive packets */
-	{
-		.opt = XTE_OPTION_LENTYPE_ERR,
-		.reg = XTE_RXC1_OFFSET,
-		.m_or =XTE_RXC1_RXLT_MASK,
-	},
-	/* Turn on flow control */
-	{
-		.opt = XTE_OPTION_FLOW_CONTROL,
-		.reg = XTE_FCC_OFFSET,
-		.m_or =XTE_FCC_RXFLO_MASK,
-	},
-	/* Turn on flow control */
-	{
-		.opt = XTE_OPTION_FLOW_CONTROL,
-		.reg = XTE_FCC_OFFSET,
-		.m_or =XTE_FCC_TXFLO_MASK,
-	},
-	/* Turn on promiscuous frame filtering (all frames are received ) */
-	{
-		.opt = XTE_OPTION_PROMISC,
-		.reg = XTE_AFM_OFFSET,
-		.m_or =XTE_AFM_EPPRM_MASK,
-	},
-	/* Enable transmitter if not already enabled */
-	{
-		.opt = XTE_OPTION_TXEN,
-		.reg = XTE_TXC_OFFSET,
-		.m_or =XTE_TXC_TXEN_MASK,
-	},
-	/* Enable receiver? */
-	{
-		.opt = XTE_OPTION_RXEN,
-		.reg = XTE_RXC1_OFFSET,
-		.m_or =XTE_RXC1_RXEN_MASK,
-	},
-	{}
-};
-
-/**
- * temac_setoptions
- */
-static u32 temac_setoptions(struct net_device *ndev, u32 options)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	struct temac_option *tp = &temac_options[0];
-	int reg;
-
-	mutex_lock(&lp->indirect_mutex);
-	while (tp->opt) {
-		reg = temac_indirect_in32(lp, tp->reg) & ~tp->m_or;
-		if (options & tp->opt)
-			reg |= tp->m_or;
-		temac_indirect_out32(lp, tp->reg, reg);
-		tp++;
-	}
-	lp->options |= options;
-	mutex_unlock(&lp->indirect_mutex);
-
-	return 0;
-}
-
-/* Initialize temac */
-static void temac_device_reset(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	u32 timeout;
-	u32 val;
-
-	/* Perform a software reset */
-
-	/* 0x300 host enable bit ? */
-	/* reset PHY through control register ?:1 */
-
-	dev_dbg(&ndev->dev, "%s()\n", __func__);
-
-	mutex_lock(&lp->indirect_mutex);
-	/* Reset the receiver and wait for it to finish reset */
-	temac_indirect_out32(lp, XTE_RXC1_OFFSET, XTE_RXC1_RXRST_MASK);
-	timeout = 1000;
-	while (temac_indirect_in32(lp, XTE_RXC1_OFFSET) & XTE_RXC1_RXRST_MASK) {
-		udelay(1);
-		if (--timeout == 0) {
-			dev_err(&ndev->dev,
-				"temac_device_reset RX reset timeout!!\n");
-			break;
-		}
-	}
-
-	/* Reset the transmitter and wait for it to finish reset */
-	temac_indirect_out32(lp, XTE_TXC_OFFSET, XTE_TXC_TXRST_MASK);
-	timeout = 1000;
-	while (temac_indirect_in32(lp, XTE_TXC_OFFSET) & XTE_TXC_TXRST_MASK) {
-		udelay(1);
-		if (--timeout == 0) {
-			dev_err(&ndev->dev,
-				"temac_device_reset TX reset timeout!!\n");
-			break;
-		}
-	}
-
-	/* Disable the receiver */
-	val = temac_indirect_in32(lp, XTE_RXC1_OFFSET);
-	temac_indirect_out32(lp, XTE_RXC1_OFFSET, val & ~XTE_RXC1_RXEN_MASK);
-
-	/* Reset Local Link (DMA) */
-	lp->dma_out(lp, DMA_CONTROL_REG, DMA_CONTROL_RST);
-	timeout = 1000;
-	while (lp->dma_in(lp, DMA_CONTROL_REG) & DMA_CONTROL_RST) {
-		udelay(1);
-		if (--timeout == 0) {
-			dev_err(&ndev->dev,
-				"temac_device_reset DMA reset timeout!!\n");
-			break;
-		}
-	}
-	lp->dma_out(lp, DMA_CONTROL_REG, DMA_TAIL_ENABLE);
-
-	if (temac_dma_bd_init(ndev)) {
-		dev_err(&ndev->dev,
-				"temac_device_reset descriptor allocation failed\n");
-	}
-
-	temac_indirect_out32(lp, XTE_RXC0_OFFSET, 0);
-	temac_indirect_out32(lp, XTE_RXC1_OFFSET, 0);
-	temac_indirect_out32(lp, XTE_TXC_OFFSET, 0);
-	temac_indirect_out32(lp, XTE_FCC_OFFSET, XTE_FCC_RXFLO_MASK);
-
-	mutex_unlock(&lp->indirect_mutex);
-
-	/* Sync default options with HW
-	 * but leave receiver and transmitter disabled.  */
-	temac_setoptions(ndev,
-			 lp->options & ~(XTE_OPTION_TXEN | XTE_OPTION_RXEN));
-
-	temac_set_mac_address(ndev, NULL);
-
-	/* Set address filter table */
-	temac_set_multicast_list(ndev);
-	if (temac_setoptions(ndev, lp->options))
-		dev_err(&ndev->dev, "Error setting TEMAC options\n");
-
-	/* Init Driver variable */
-	ndev->trans_start = jiffies; /* prevent tx timeout */
-}
-
-void temac_adjust_link(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	struct phy_device *phy = lp->phy_dev;
-	u32 mii_speed;
-	int link_state;
-
-	/* hash together the state values to decide if something has changed */
-	link_state = phy->speed | (phy->duplex << 1) | phy->link;
-
-	mutex_lock(&lp->indirect_mutex);
-	if (lp->last_link != link_state) {
-		mii_speed = temac_indirect_in32(lp, XTE_EMCFG_OFFSET);
-		mii_speed &= ~XTE_EMCFG_LINKSPD_MASK;
-
-		switch (phy->speed) {
-		case SPEED_1000: mii_speed |= XTE_EMCFG_LINKSPD_1000; break;
-		case SPEED_100: mii_speed |= XTE_EMCFG_LINKSPD_100; break;
-		case SPEED_10: mii_speed |= XTE_EMCFG_LINKSPD_10; break;
-		}
-
-		/* Write new speed setting out to TEMAC */
-		temac_indirect_out32(lp, XTE_EMCFG_OFFSET, mii_speed);
-		lp->last_link = link_state;
-		phy_print_status(phy);
-	}
-	mutex_unlock(&lp->indirect_mutex);
-}
-
-static void temac_start_xmit_done(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	struct cdmac_bd *cur_p;
-	unsigned int stat = 0;
-
-	cur_p = &lp->tx_bd_v[lp->tx_bd_ci];
-	stat = cur_p->app0;
-
-	while (stat & STS_CTRL_APP0_CMPLT) {
-		dma_unmap_single(ndev->dev.parent, cur_p->phys, cur_p->len,
-				 DMA_TO_DEVICE);
-		if (cur_p->app4)
-			dev_kfree_skb_irq((struct sk_buff *)cur_p->app4);
-		cur_p->app0 = 0;
-		cur_p->app1 = 0;
-		cur_p->app2 = 0;
-		cur_p->app3 = 0;
-		cur_p->app4 = 0;
-
-		ndev->stats.tx_packets++;
-		ndev->stats.tx_bytes += cur_p->len;
-
-		lp->tx_bd_ci++;
-		if (lp->tx_bd_ci >= TX_BD_NUM)
-			lp->tx_bd_ci = 0;
-
-		cur_p = &lp->tx_bd_v[lp->tx_bd_ci];
-		stat = cur_p->app0;
-	}
-
-	netif_wake_queue(ndev);
-}
-
-static inline int temac_check_tx_bd_space(struct temac_local *lp, int num_frag)
-{
-	struct cdmac_bd *cur_p;
-	int tail;
-
-	tail = lp->tx_bd_tail;
-	cur_p = &lp->tx_bd_v[tail];
-
-	do {
-		if (cur_p->app0)
-			return NETDEV_TX_BUSY;
-
-		tail++;
-		if (tail >= TX_BD_NUM)
-			tail = 0;
-
-		cur_p = &lp->tx_bd_v[tail];
-		num_frag--;
-	} while (num_frag >= 0);
-
-	return 0;
-}
-
-static int temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	struct cdmac_bd *cur_p;
-	dma_addr_t start_p, tail_p;
-	int ii;
-	unsigned long num_frag;
-	skb_frag_t *frag;
-
-	num_frag = skb_shinfo(skb)->nr_frags;
-	frag = &skb_shinfo(skb)->frags[0];
-	start_p = lp->tx_bd_p + sizeof(*lp->tx_bd_v) * lp->tx_bd_tail;
-	cur_p = &lp->tx_bd_v[lp->tx_bd_tail];
-
-	if (temac_check_tx_bd_space(lp, num_frag)) {
-		if (!netif_queue_stopped(ndev)) {
-			netif_stop_queue(ndev);
-			return NETDEV_TX_BUSY;
-		}
-		return NETDEV_TX_BUSY;
-	}
-
-	cur_p->app0 = 0;
-	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		unsigned int csum_start_off = skb_checksum_start_offset(skb);
-		unsigned int csum_index_off = csum_start_off + skb->csum_offset;
-
-		cur_p->app0 |= 1; /* TX Checksum Enabled */
-		cur_p->app1 = (csum_start_off << 16) | csum_index_off;
-		cur_p->app2 = 0;  /* initial checksum seed */
-	}
-
-	cur_p->app0 |= STS_CTRL_APP0_SOP;
-	cur_p->len = skb_headlen(skb);
-	cur_p->phys = dma_map_single(ndev->dev.parent, skb->data, skb->len,
-				     DMA_TO_DEVICE);
-	cur_p->app4 = (unsigned long)skb;
-
-	for (ii = 0; ii < num_frag; ii++) {
-		lp->tx_bd_tail++;
-		if (lp->tx_bd_tail >= TX_BD_NUM)
-			lp->tx_bd_tail = 0;
-
-		cur_p = &lp->tx_bd_v[lp->tx_bd_tail];
-		cur_p->phys = dma_map_single(ndev->dev.parent,
-					     (void *)page_address(frag->page) +
-					          frag->page_offset,
-					     frag->size, DMA_TO_DEVICE);
-		cur_p->len = frag->size;
-		cur_p->app0 = 0;
-		frag++;
-	}
-	cur_p->app0 |= STS_CTRL_APP0_EOP;
-
-	tail_p = lp->tx_bd_p + sizeof(*lp->tx_bd_v) * lp->tx_bd_tail;
-	lp->tx_bd_tail++;
-	if (lp->tx_bd_tail >= TX_BD_NUM)
-		lp->tx_bd_tail = 0;
-
-	skb_tx_timestamp(skb);
-
-	/* Kick off the transfer */
-	lp->dma_out(lp, TX_TAILDESC_PTR, tail_p); /* DMA start */
-
-	return NETDEV_TX_OK;
-}
-
-
-static void ll_temac_recv(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	struct sk_buff *skb, *new_skb;
-	unsigned int bdstat;
-	struct cdmac_bd *cur_p;
-	dma_addr_t tail_p;
-	int length;
-	unsigned long flags;
-
-	spin_lock_irqsave(&lp->rx_lock, flags);
-
-	tail_p = lp->rx_bd_p + sizeof(*lp->rx_bd_v) * lp->rx_bd_ci;
-	cur_p = &lp->rx_bd_v[lp->rx_bd_ci];
-
-	bdstat = cur_p->app0;
-	while ((bdstat & STS_CTRL_APP0_CMPLT)) {
-
-		skb = lp->rx_skb[lp->rx_bd_ci];
-		length = cur_p->app4 & 0x3FFF;
-
-		dma_unmap_single(ndev->dev.parent, cur_p->phys, length,
-				 DMA_FROM_DEVICE);
-
-		skb_put(skb, length);
-		skb->dev = ndev;
-		skb->protocol = eth_type_trans(skb, ndev);
-		skb_checksum_none_assert(skb);
-
-		/* if we're doing rx csum offload, set it up */
-		if (((lp->temac_features & TEMAC_FEATURE_RX_CSUM) != 0) &&
-			(skb->protocol == __constant_htons(ETH_P_IP)) &&
-			(skb->len > 64)) {
-
-			skb->csum = cur_p->app3 & 0xFFFF;
-			skb->ip_summed = CHECKSUM_COMPLETE;
-		}
-
-		if (!skb_defer_rx_timestamp(skb))
-			netif_rx(skb);
-
-		ndev->stats.rx_packets++;
-		ndev->stats.rx_bytes += length;
-
-		new_skb = netdev_alloc_skb_ip_align(ndev,
-						XTE_MAX_JUMBO_FRAME_SIZE);
-
-		if (new_skb == 0) {
-			dev_err(&ndev->dev, "no memory for new sk_buff\n");
-			spin_unlock_irqrestore(&lp->rx_lock, flags);
-			return;
-		}
-
-		cur_p->app0 = STS_CTRL_APP0_IRQONEND;
-		cur_p->phys = dma_map_single(ndev->dev.parent, new_skb->data,
-					     XTE_MAX_JUMBO_FRAME_SIZE,
-					     DMA_FROM_DEVICE);
-		cur_p->len = XTE_MAX_JUMBO_FRAME_SIZE;
-		lp->rx_skb[lp->rx_bd_ci] = new_skb;
-
-		lp->rx_bd_ci++;
-		if (lp->rx_bd_ci >= RX_BD_NUM)
-			lp->rx_bd_ci = 0;
-
-		cur_p = &lp->rx_bd_v[lp->rx_bd_ci];
-		bdstat = cur_p->app0;
-	}
-	lp->dma_out(lp, RX_TAILDESC_PTR, tail_p);
-
-	spin_unlock_irqrestore(&lp->rx_lock, flags);
-}
-
-static irqreturn_t ll_temac_tx_irq(int irq, void *_ndev)
-{
-	struct net_device *ndev = _ndev;
-	struct temac_local *lp = netdev_priv(ndev);
-	unsigned int status;
-
-	status = lp->dma_in(lp, TX_IRQ_REG);
-	lp->dma_out(lp, TX_IRQ_REG, status);
-
-	if (status & (IRQ_COAL | IRQ_DLY))
-		temac_start_xmit_done(lp->ndev);
-	if (status & 0x080)
-		dev_err(&ndev->dev, "DMA error 0x%x\n", status);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t ll_temac_rx_irq(int irq, void *_ndev)
-{
-	struct net_device *ndev = _ndev;
-	struct temac_local *lp = netdev_priv(ndev);
-	unsigned int status;
-
-	/* Read and clear the status registers */
-	status = lp->dma_in(lp, RX_IRQ_REG);
-	lp->dma_out(lp, RX_IRQ_REG, status);
-
-	if (status & (IRQ_COAL | IRQ_DLY))
-		ll_temac_recv(lp->ndev);
-
-	return IRQ_HANDLED;
-}
-
-static int temac_open(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-	int rc;
-
-	dev_dbg(&ndev->dev, "temac_open()\n");
-
-	if (lp->phy_node) {
-		lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node,
-					     temac_adjust_link, 0, 0);
-		if (!lp->phy_dev) {
-			dev_err(lp->dev, "of_phy_connect() failed\n");
-			return -ENODEV;
-		}
-
-		phy_start(lp->phy_dev);
-	}
-
-	rc = request_irq(lp->tx_irq, ll_temac_tx_irq, 0, ndev->name, ndev);
-	if (rc)
-		goto err_tx_irq;
-	rc = request_irq(lp->rx_irq, ll_temac_rx_irq, 0, ndev->name, ndev);
-	if (rc)
-		goto err_rx_irq;
-
-	temac_device_reset(ndev);
-	return 0;
-
- err_rx_irq:
-	free_irq(lp->tx_irq, ndev);
- err_tx_irq:
-	if (lp->phy_dev)
-		phy_disconnect(lp->phy_dev);
-	lp->phy_dev = NULL;
-	dev_err(lp->dev, "request_irq() failed\n");
-	return rc;
-}
-
-static int temac_stop(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-
-	dev_dbg(&ndev->dev, "temac_close()\n");
-
-	free_irq(lp->tx_irq, ndev);
-	free_irq(lp->rx_irq, ndev);
-
-	if (lp->phy_dev)
-		phy_disconnect(lp->phy_dev);
-	lp->phy_dev = NULL;
-
-	temac_dma_bd_release(ndev);
-
-	return 0;
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-static void
-temac_poll_controller(struct net_device *ndev)
-{
-	struct temac_local *lp = netdev_priv(ndev);
-
-	disable_irq(lp->tx_irq);
-	disable_irq(lp->rx_irq);
-
-	ll_temac_rx_irq(lp->tx_irq, ndev);
-	ll_temac_tx_irq(lp->rx_irq, ndev);
-
-	enable_irq(lp->tx_irq);
-	enable_irq(lp->rx_irq);
-}
-#endif
-
-static const struct net_device_ops temac_netdev_ops = {
-	.ndo_open = temac_open,
-	.ndo_stop = temac_stop,
-	.ndo_start_xmit = temac_start_xmit,
-	.ndo_set_mac_address = netdev_set_mac_address,
-	.ndo_validate_addr = eth_validate_addr,
-	//.ndo_set_multicast_list = temac_set_multicast_list,
-#ifdef CONFIG_NET_POLL_CONTROLLER
-	.ndo_poll_controller = temac_poll_controller,
-#endif
-};
-
-/* ---------------------------------------------------------------------
- * SYSFS device attributes
- */
-static ssize_t temac_show_llink_regs(struct device *dev,
-				     struct device_attribute *attr, char *buf)
-{
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct temac_local *lp = netdev_priv(ndev);
-	int i, len = 0;
-
-	for (i = 0; i < 0x11; i++)
-		len += sprintf(buf + len, "%.8x%s", lp->dma_in(lp, i),
-			       (i % 8) == 7 ? "\n" : " ");
-	len += sprintf(buf + len, "\n");
-
-	return len;
-}
-
-static DEVICE_ATTR(llink_regs, 0440, temac_show_llink_regs, NULL);
-
-static struct attribute *temac_device_attrs[] = {
-	&dev_attr_llink_regs.attr,
-	NULL,
-};
-
-static const struct attribute_group temac_attr_group = {
-	.attrs = temac_device_attrs,
-};
-
-static int __devinit temac_of_probe(struct platform_device *op)
-{
-	struct device_node *np;
-	struct temac_local *lp;
-	struct net_device *ndev;
-	const void *addr;
-	__be32 *p;
-	int size, rc = 0;
-
-	/* Init network device structure */
-	ndev = alloc_etherdev(sizeof(*lp));
-	if (!ndev) {
-		dev_err(&op->dev, "could not allocate device.\n");
-		return -ENOMEM;
-	}
-	ether_setup(ndev);
-	dev_set_drvdata(&op->dev, ndev);
-	SET_NETDEV_DEV(ndev, &op->dev);
-	ndev->flags &= ~IFF_MULTICAST;  /* clear multicast */
-	ndev->features = NETIF_F_SG | NETIF_F_FRAGLIST;
-	ndev->netdev_ops = &temac_netdev_ops;
-#if 0
-	ndev->features |= NETIF_F_IP_CSUM; /* Can checksum TCP/UDP over IPv4. */
-	ndev->features |= NETIF_F_HW_CSUM; /* Can checksum all the packets. */
-	ndev->features |= NETIF_F_IPV6_CSUM; /* Can checksum IPV6 TCP/UDP */
-	ndev->features |= NETIF_F_HIGHDMA; /* Can DMA to high memory. */
-	ndev->features |= NETIF_F_HW_VLAN_TX; /* Transmit VLAN hw accel */
-	ndev->features |= NETIF_F_HW_VLAN_RX; /* Receive VLAN hw acceleration */
-	ndev->features |= NETIF_F_HW_VLAN_FILTER; /* Receive VLAN filtering */
-	ndev->features |= NETIF_F_VLAN_CHALLENGED; /* cannot handle VLAN pkts */
-	ndev->features |= NETIF_F_GSO; /* Enable software GSO. */
-	ndev->features |= NETIF_F_MULTI_QUEUE; /* Has multiple TX/RX queues */
-	ndev->features |= NETIF_F_LRO; /* large receive offload */
-#endif
-
-	/* setup temac private info structure */
-	lp = netdev_priv(ndev);
-	lp->ndev = ndev;
-	lp->dev = &op->dev;
-	lp->options = XTE_OPTION_DEFAULTS;
-	spin_lock_init(&lp->rx_lock);
-	mutex_init(&lp->indirect_mutex);
-
-	/* map device registers */
-	lp->regs = of_iomap(op->dev.of_node, 0);
-	if (!lp->regs) {
-		dev_err(&op->dev, "could not map temac regs.\n");
-		goto nodev;
-	}
-
-	/* Setup checksum offload, but default to off if not specified */
-	lp->temac_features = 0;
-	p = (__be32 *)of_get_property(op->dev.of_node, "xlnx,txcsum", NULL);
-	if (p && be32_to_cpu(*p)) {
-		lp->temac_features |= TEMAC_FEATURE_TX_CSUM;
-		/* Can checksum TCP/UDP over IPv4. */
-		ndev->features |= NETIF_F_IP_CSUM;
-	}
-	p = (__be32 *)of_get_property(op->dev.of_node, "xlnx,rxcsum", NULL);
-	if (p && be32_to_cpu(*p))
-		lp->temac_features |= TEMAC_FEATURE_RX_CSUM;
-
-	/* Find the DMA node, map the DMA registers, and decode the DMA IRQs */
-	np = of_parse_phandle(op->dev.of_node, "llink-connected", 0);
-	if (!np) {
-		dev_err(&op->dev, "could not find DMA node\n");
-		goto err_iounmap;
-	}
-
-	/* Setup the DMA register accesses, could be DCR or memory mapped */
-	if (temac_dcr_setup(lp, op, np)) {
-
-		/* no DCR in the device tree, try non-DCR */
-		lp->sdma_regs = of_iomap(np, 0);
-		if (lp->sdma_regs) {
-			lp->dma_in = temac_dma_in32;
-			lp->dma_out = temac_dma_out32;
-			dev_dbg(&op->dev, "MEM base: %p\n", lp->sdma_regs);
-		} else {
-			dev_err(&op->dev, "unable to map DMA registers\n");
-			of_node_put(np);
-			goto err_iounmap;
-		}
-	}
-
-	lp->rx_irq = irq_of_parse_and_map(np, 0);
-	lp->tx_irq = irq_of_parse_and_map(np, 1);
-
-	of_node_put(np); /* Finished with the DMA node; drop the reference */
-
-	if ((lp->rx_irq == NO_IRQ) || (lp->tx_irq == NO_IRQ)) {
-		dev_err(&op->dev, "could not determine irqs\n");
-		rc = -ENOMEM;
-		goto err_iounmap_2;
-	}
-
-
-	/* Retrieve the MAC address */
-	addr = of_get_property(op->dev.of_node, "local-mac-address", &size);
-	if ((!addr) || (size != 6)) {
-		dev_err(&op->dev, "could not find MAC address\n");
-		rc = -ENODEV;
-		goto err_iounmap_2;
-	}
-	temac_set_mac_address(ndev, (void *)addr);
-
-	rc = temac_mdio_setup(lp, op->dev.of_node);
-	if (rc)
-		dev_warn(&op->dev, "error registering MDIO bus\n");
-
-	lp->phy_node = of_parse_phandle(op->dev.of_node, "phy-handle", 0);
-	if (lp->phy_node)
-		dev_dbg(lp->dev, "using PHY node %s (%p)\n", np->full_name, np);
-
-	/* Add the device attributes */
-	rc = sysfs_create_group(&lp->dev->kobj, &temac_attr_group);
-	if (rc) {
-		dev_err(lp->dev, "Error creating sysfs files\n");
-		goto err_iounmap_2;
-	}
-
-	rc = register_netdev(lp->ndev);
-	if (rc) {
-		dev_err(lp->dev, "register_netdev() error (%i)\n", rc);
-		goto err_register_ndev;
-	}
-
-	return 0;
-
- err_register_ndev:
-	sysfs_remove_group(&lp->dev->kobj, &temac_attr_group);
- err_iounmap_2:
-	if (lp->sdma_regs)
-		iounmap(lp->sdma_regs);
- err_iounmap:
-	iounmap(lp->regs);
- nodev:
-	free_netdev(ndev);
-	ndev = NULL;
-	return rc;
-}
-
-static int __devexit temac_of_remove(struct platform_device *op)
-{
-	struct net_device *ndev = dev_get_drvdata(&op->dev);
-	struct temac_local *lp = netdev_priv(ndev);
-
-	temac_mdio_teardown(lp);
-	unregister_netdev(ndev);
-	sysfs_remove_group(&lp->dev->kobj, &temac_attr_group);
-	if (lp->phy_node)
-		of_node_put(lp->phy_node);
-	lp->phy_node = NULL;
-	dev_set_drvdata(&op->dev, NULL);
-	iounmap(lp->regs);
-	if (lp->sdma_regs)
-		iounmap(lp->sdma_regs);
-	free_netdev(ndev);
-	return 0;
-}
-
-static struct of_device_id temac_of_match[] __devinitdata = {
-	{ .compatible = "xlnx,xps-ll-temac-1.01.b", },
-	{ .compatible = "xlnx,xps-ll-temac-2.00.a", },
-	{ .compatible = "xlnx,xps-ll-temac-2.02.a", },
-	{ .compatible = "xlnx,xps-ll-temac-2.03.a", },
-	{},
-};
-MODULE_DEVICE_TABLE(of, temac_of_match);
-
-static struct platform_driver temac_of_driver = {
-	.probe = temac_of_probe,
-	.remove = __devexit_p(temac_of_remove),
-	.driver = {
-		.owner = THIS_MODULE,
-		.name = "xilinx_temac",
-		.of_match_table = temac_of_match,
-	},
-};
-
-static int __init temac_init(void)
-{
-	return platform_driver_register(&temac_of_driver);
-}
-module_init(temac_init);
-
-static void __exit temac_exit(void)
-{
-	platform_driver_unregister(&temac_of_driver);
-}
-module_exit(temac_exit);
-
-MODULE_DESCRIPTION("Xilinx LL_TEMAC Ethernet driver");
-MODULE_AUTHOR("Yoshio Kashiwagi");
-MODULE_LICENSE("GPL");