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>

6 files changed, 3033 insertions, 0 deletions

diff --git a/drivers/net/ethernet/xilinx/Kconfig b/drivers/net/ethernet/xilinx/Kconfig
new file mode 100644
index 00000000000..4e3aad401cd
--- /dev/null
+++ b/drivers/net/ethernet/xilinx/Kconfig
@@ -0,0 +1,35 @@
+#
+# Xilink device configuration
+#
+
+config NET_VENDOR_XILINX
+	bool "Xilinx devices"
+	depends on PPC || PPC32 || MICROBLAZE
+	---help---
+	  If you have a network (Ethernet) card belonging to this class, say Y
+	  and read the Ethernet-HOWTO, available from
+	  <http://www.tldp.org/docs.html#howto>.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about Xilinx devices. If you say Y, you will be asked
+	  for your specific card in the following questions.
+
+if NET_VENDOR_XILINX
+
+config XILINX_EMACLITE
+	tristate "Xilinx 10/100 Ethernet Lite support"
+	depends on (PPC32 || MICROBLAZE)
+	select PHYLIB
+	---help---
+	  This driver supports the 10/100 Ethernet Lite from Xilinx.
+
+config XILINX_LL_TEMAC
+	tristate "Xilinx LL TEMAC (LocalLink Tri-mode Ethernet MAC) driver"
+	depends on (PPC || MICROBLAZE)
+	select PHYLIB
+	---help---
+	  This driver supports the Xilinx 10/100/1000 LocalLink TEMAC
+	  core used in Xilinx Spartan and Virtex FPGAs
+
+endif # NET_VENDOR_XILINX
diff --git a/drivers/net/ethernet/xilinx/Makefile b/drivers/net/ethernet/xilinx/Makefile
new file mode 100644
index 00000000000..5feac734ea4
--- /dev/null
+++ b/drivers/net/ethernet/xilinx/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the Xilink network device drivers.
+#
+
+ll_temac-objs := ll_temac_main.o ll_temac_mdio.o
+obj-$(CONFIG_XILINX_LL_TEMAC) += ll_temac.o
+obj-$(CONFIG_XILINX_EMACLITE) += xilinx_emaclite.o
diff --git a/drivers/net/ethernet/xilinx/ll_temac.h b/drivers/net/ethernet/xilinx/ll_temac.h
new file mode 100644
index 00000000000..522abe2ff25
--- /dev/null
+++ b/drivers/net/ethernet/xilinx/ll_temac.h
@@ -0,0 +1,385 @@
+
+#ifndef XILINX_LL_TEMAC_H
+#define XILINX_LL_TEMAC_H
+
+#include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/spinlock.h>
+
+#ifdef CONFIG_PPC_DCR
+#include <asm/dcr.h>
+#include <asm/dcr-regs.h>
+#endif
+
+/* packet size info */
+#define XTE_HDR_SIZE			14      /* size of Ethernet header */
+#define XTE_TRL_SIZE			4       /* size of Ethernet trailer (FCS) */
+#define XTE_JUMBO_MTU			9000
+#define XTE_MAX_JUMBO_FRAME_SIZE	(XTE_JUMBO_MTU + XTE_HDR_SIZE + XTE_TRL_SIZE)
+
+/*  Configuration options */
+
+/*  Accept all incoming packets.
+ *  This option defaults to disabled (cleared) */
+#define XTE_OPTION_PROMISC                      (1 << 0)
+/*  Jumbo frame support for Tx & Rx.
+ *  This option defaults to disabled (cleared) */
+#define XTE_OPTION_JUMBO                        (1 << 1)
+/*  VLAN Rx & Tx frame support.
+ *  This option defaults to disabled (cleared) */
+#define XTE_OPTION_VLAN                         (1 << 2)
+/*  Enable recognition of flow control frames on Rx
+ *  This option defaults to enabled (set) */
+#define XTE_OPTION_FLOW_CONTROL                 (1 << 4)
+/*  Strip FCS and PAD from incoming frames.
+ *  Note: PAD from VLAN frames is not stripped.
+ *  This option defaults to disabled (set) */
+#define XTE_OPTION_FCS_STRIP                    (1 << 5)
+/*  Generate FCS field and add PAD automatically for outgoing frames.
+ *  This option defaults to enabled (set) */
+#define XTE_OPTION_FCS_INSERT                   (1 << 6)
+/*  Enable Length/Type error checking for incoming frames. When this option is
+set, the MAC will filter frames that have a mismatched type/length field
+and if XTE_OPTION_REPORT_RXERR is set, the user is notified when these
+types of frames are encountered. When this option is cleared, the MAC will
+allow these types of frames to be received.
+This option defaults to enabled (set) */
+#define XTE_OPTION_LENTYPE_ERR                  (1 << 7)
+/*  Enable the transmitter.
+ *  This option defaults to enabled (set) */
+#define XTE_OPTION_TXEN                         (1 << 11)
+/*  Enable the receiver
+*   This option defaults to enabled (set) */
+#define XTE_OPTION_RXEN                         (1 << 12)
+
+/*  Default options set when device is initialized or reset */
+#define XTE_OPTION_DEFAULTS                     \
+	(XTE_OPTION_TXEN |                          \
+	 XTE_OPTION_FLOW_CONTROL |                  \
+	 XTE_OPTION_RXEN)
+
+/* XPS_LL_TEMAC SDMA registers definition */
+
+#define TX_NXTDESC_PTR      0x00            /* r */
+#define TX_CURBUF_ADDR      0x01            /* r */
+#define TX_CURBUF_LENGTH    0x02            /* r */
+#define TX_CURDESC_PTR      0x03            /* rw */
+#define TX_TAILDESC_PTR     0x04            /* rw */
+#define TX_CHNL_CTRL        0x05            /* rw */
+/*
+ 0:7      24:31       IRQTimeout
+ 8:15     16:23       IRQCount
+ 16:20    11:15       Reserved
+ 21       10          0
+ 22       9           UseIntOnEnd
+ 23       8           LdIRQCnt
+ 24       7           IRQEn
+ 25:28    3:6         Reserved
+ 29       2           IrqErrEn
+ 30       1           IrqDlyEn
+ 31       0           IrqCoalEn
+*/
+#define CHNL_CTRL_IRQ_IOE       (1 << 9)
+#define CHNL_CTRL_IRQ_EN        (1 << 7)
+#define CHNL_CTRL_IRQ_ERR_EN    (1 << 2)
+#define CHNL_CTRL_IRQ_DLY_EN    (1 << 1)
+#define CHNL_CTRL_IRQ_COAL_EN   (1 << 0)
+#define TX_IRQ_REG          0x06            /* rw */
+/*
+  0:7      24:31       DltTmrValue
+ 8:15     16:23       ClscCntrValue
+ 16:17    14:15       Reserved
+ 18:21    10:13       ClscCnt
+ 22:23    8:9         DlyCnt
+ 24:28    3::7        Reserved
+ 29       2           ErrIrq
+ 30       1           DlyIrq
+ 31       0           CoalIrq
+ */
+#define TX_CHNL_STS         0x07            /* r */
+/*
+   0:9      22:31   Reserved
+ 10       21      TailPErr
+ 11       20      CmpErr
+ 12       19      AddrErr
+ 13       18      NxtPErr
+ 14       17      CurPErr
+ 15       16      BsyWr
+ 16:23    8:15    Reserved
+ 24       7       Error
+ 25       6       IOE
+ 26       5       SOE
+ 27       4       Cmplt
+ 28       3       SOP
+ 29       2       EOP
+ 30       1       EngBusy
+ 31       0       Reserved
+*/
+
+#define RX_NXTDESC_PTR      0x08            /* r */
+#define RX_CURBUF_ADDR      0x09            /* r */
+#define RX_CURBUF_LENGTH    0x0a            /* r */
+#define RX_CURDESC_PTR      0x0b            /* rw */
+#define RX_TAILDESC_PTR     0x0c            /* rw */
+#define RX_CHNL_CTRL        0x0d            /* rw */
+/*
+ 0:7      24:31       IRQTimeout
+ 8:15     16:23       IRQCount
+ 16:20    11:15       Reserved
+ 21       10          0
+ 22       9           UseIntOnEnd
+ 23       8           LdIRQCnt
+ 24       7           IRQEn
+ 25:28    3:6         Reserved
+ 29       2           IrqErrEn
+ 30       1           IrqDlyEn
+ 31       0           IrqCoalEn
+ */
+#define RX_IRQ_REG          0x0e            /* rw */
+#define IRQ_COAL        (1 << 0)
+#define IRQ_DLY         (1 << 1)
+#define IRQ_ERR         (1 << 2)
+#define IRQ_DMAERR      (1 << 7)            /* this is not documented ??? */
+/*
+ 0:7      24:31       DltTmrValue
+ 8:15     16:23       ClscCntrValue
+ 16:17    14:15       Reserved
+ 18:21    10:13       ClscCnt
+ 22:23    8:9         DlyCnt
+ 24:28    3::7        Reserved
+*/
+#define RX_CHNL_STS         0x0f        /* r */
+#define CHNL_STS_ENGBUSY    (1 << 1)
+#define CHNL_STS_EOP        (1 << 2)
+#define CHNL_STS_SOP        (1 << 3)
+#define CHNL_STS_CMPLT      (1 << 4)
+#define CHNL_STS_SOE        (1 << 5)
+#define CHNL_STS_IOE        (1 << 6)
+#define CHNL_STS_ERR        (1 << 7)
+
+#define CHNL_STS_BSYWR      (1 << 16)
+#define CHNL_STS_CURPERR    (1 << 17)
+#define CHNL_STS_NXTPERR    (1 << 18)
+#define CHNL_STS_ADDRERR    (1 << 19)
+#define CHNL_STS_CMPERR     (1 << 20)
+#define CHNL_STS_TAILERR    (1 << 21)
+/*
+ 0:9      22:31   Reserved
+ 10       21      TailPErr
+ 11       20      CmpErr
+ 12       19      AddrErr
+ 13       18      NxtPErr
+ 14       17      CurPErr
+ 15       16      BsyWr
+ 16:23    8:15    Reserved
+ 24       7       Error
+ 25       6       IOE
+ 26       5       SOE
+ 27       4       Cmplt
+ 28       3       SOP
+ 29       2       EOP
+ 30       1       EngBusy
+ 31       0       Reserved
+*/
+
+#define DMA_CONTROL_REG             0x10            /* rw */
+#define DMA_CONTROL_RST                 (1 << 0)
+#define DMA_TAIL_ENABLE                 (1 << 2)
+
+/* XPS_LL_TEMAC direct registers definition */
+
+#define XTE_RAF0_OFFSET              0x00
+#define RAF0_RST                        (1 << 0)
+#define RAF0_MCSTREJ                    (1 << 1)
+#define RAF0_BCSTREJ                    (1 << 2)
+#define XTE_TPF0_OFFSET              0x04
+#define XTE_IFGP0_OFFSET             0x08
+#define XTE_ISR0_OFFSET              0x0c
+#define ISR0_HARDACSCMPLT               (1 << 0)
+#define ISR0_AUTONEG                    (1 << 1)
+#define ISR0_RXCMPLT                    (1 << 2)
+#define ISR0_RXREJ                      (1 << 3)
+#define ISR0_RXFIFOOVR                  (1 << 4)
+#define ISR0_TXCMPLT                    (1 << 5)
+#define ISR0_RXDCMLCK                   (1 << 6)
+
+#define XTE_IPR0_OFFSET              0x10
+#define XTE_IER0_OFFSET              0x14
+
+#define XTE_MSW0_OFFSET              0x20
+#define XTE_LSW0_OFFSET              0x24
+#define XTE_CTL0_OFFSET              0x28
+#define XTE_RDY0_OFFSET              0x2c
+
+#define XTE_RSE_MIIM_RR_MASK      0x0002
+#define XTE_RSE_MIIM_WR_MASK      0x0004
+#define XTE_RSE_CFG_RR_MASK       0x0020
+#define XTE_RSE_CFG_WR_MASK       0x0040
+#define XTE_RDY0_HARD_ACS_RDY_MASK  (0x10000)
+
+/* XPS_LL_TEMAC indirect registers offset definition */
+
+#define	XTE_RXC0_OFFSET			0x00000200 /* Rx configuration word 0 */
+#define	XTE_RXC1_OFFSET			0x00000240 /* Rx configuration word 1 */
+#define XTE_RXC1_RXRST_MASK		(1 << 31)  /* Receiver reset */
+#define XTE_RXC1_RXJMBO_MASK		(1 << 30)  /* Jumbo frame enable */
+#define XTE_RXC1_RXFCS_MASK		(1 << 29)  /* FCS not stripped */
+#define XTE_RXC1_RXEN_MASK		(1 << 28)  /* Receiver enable */
+#define XTE_RXC1_RXVLAN_MASK		(1 << 27)  /* VLAN enable */
+#define XTE_RXC1_RXHD_MASK		(1 << 26)  /* Half duplex */
+#define XTE_RXC1_RXLT_MASK		(1 << 25)  /* Length/type check disable */
+
+#define XTE_TXC_OFFSET			0x00000280 /*  Tx configuration */
+#define XTE_TXC_TXRST_MASK		(1 << 31)  /* Transmitter reset */
+#define XTE_TXC_TXJMBO_MASK		(1 << 30)  /* Jumbo frame enable */
+#define XTE_TXC_TXFCS_MASK		(1 << 29)  /* Generate FCS */
+#define XTE_TXC_TXEN_MASK		(1 << 28)  /* Transmitter enable */
+#define XTE_TXC_TXVLAN_MASK		(1 << 27)  /* VLAN enable */
+#define XTE_TXC_TXHD_MASK		(1 << 26)  /* Half duplex */
+
+#define XTE_FCC_OFFSET			0x000002C0 /* Flow control config */
+#define XTE_FCC_RXFLO_MASK		(1 << 29)  /* Rx flow control enable */
+#define XTE_FCC_TXFLO_MASK		(1 << 30)  /* Tx flow control enable */
+
+#define XTE_EMCFG_OFFSET		0x00000300 /* EMAC configuration */
+#define XTE_EMCFG_LINKSPD_MASK		0xC0000000 /* Link speed */
+#define XTE_EMCFG_HOSTEN_MASK		(1 << 26)  /* Host interface enable */
+#define XTE_EMCFG_LINKSPD_10		0x00000000 /* 10 Mbit LINKSPD_MASK */
+#define XTE_EMCFG_LINKSPD_100		(1 << 30)  /* 100 Mbit LINKSPD_MASK */
+#define XTE_EMCFG_LINKSPD_1000		(1 << 31)  /* 1000 Mbit LINKSPD_MASK */
+
+#define XTE_GMIC_OFFSET			0x00000320 /* RGMII/SGMII config */
+#define XTE_MC_OFFSET			0x00000340 /* MDIO configuration */
+#define XTE_UAW0_OFFSET			0x00000380 /* Unicast address word 0 */
+#define XTE_UAW1_OFFSET			0x00000384 /* Unicast address word 1 */
+
+#define XTE_MAW0_OFFSET			0x00000388 /* Multicast addr word 0 */
+#define XTE_MAW1_OFFSET			0x0000038C /* Multicast addr word 1 */
+#define XTE_AFM_OFFSET			0x00000390 /* Promiscuous mode */
+#define XTE_AFM_EPPRM_MASK		(1 << 31)  /* Promiscuous mode enable */
+
+/* Interrupt Request status */
+#define XTE_TIS_OFFSET			0x000003A0
+#define TIS_FRIS			(1 << 0)
+#define TIS_MRIS			(1 << 1)
+#define TIS_MWIS			(1 << 2)
+#define TIS_ARIS			(1 << 3)
+#define TIS_AWIS			(1 << 4)
+#define TIS_CRIS			(1 << 5)
+#define TIS_CWIS			(1 << 6)
+
+#define XTE_TIE_OFFSET			0x000003A4 /* Interrupt enable */
+
+/**  MII Mamagement Control register (MGTCR) */
+#define XTE_MGTDR_OFFSET		0x000003B0 /* MII data */
+#define XTE_MIIMAI_OFFSET		0x000003B4 /* MII control */
+
+#define CNTLREG_WRITE_ENABLE_MASK   0x8000
+#define CNTLREG_EMAC1SEL_MASK       0x0400
+#define CNTLREG_ADDRESSCODE_MASK    0x03ff
+
+/* CDMAC descriptor status bit definitions */
+
+#define STS_CTRL_APP0_ERR         (1 << 31)
+#define STS_CTRL_APP0_IRQONEND    (1 << 30)
+/* undoccumented */
+#define STS_CTRL_APP0_STOPONEND   (1 << 29)
+#define STS_CTRL_APP0_CMPLT       (1 << 28)
+#define STS_CTRL_APP0_SOP         (1 << 27)
+#define STS_CTRL_APP0_EOP         (1 << 26)
+#define STS_CTRL_APP0_ENGBUSY     (1 << 25)
+/* undocumented */
+#define STS_CTRL_APP0_ENGRST      (1 << 24)
+
+#define TX_CONTROL_CALC_CSUM_MASK   1
+
+#define MULTICAST_CAM_TABLE_NUM 4
+
+/* TEMAC Synthesis features */
+#define TEMAC_FEATURE_RX_CSUM  (1 << 0)
+#define TEMAC_FEATURE_TX_CSUM  (1 << 1)
+
+/* TX/RX CURDESC_PTR points to first descriptor */
+/* TX/RX TAILDESC_PTR points to last descriptor in linked list */
+
+/**
+ * struct cdmac_bd - LocalLink buffer descriptor format
+ *
+ * app0 bits:
+ *	0    Error
+ *	1    IrqOnEnd    generate an interrupt at completion of DMA  op
+ *	2    reserved
+ *	3    completed   Current descriptor completed
+ *	4    SOP         TX - marks first desc/ RX marks first desct
+ *	5    EOP         TX marks last desc/RX marks last desc
+ *	6    EngBusy     DMA is processing
+ *	7    reserved
+ *	8:31 application specific
+ */
+struct cdmac_bd {
+	u32 next;	/* Physical address of next buffer descriptor */
+	u32 phys;
+	u32 len;
+	u32 app0;
+	u32 app1;	/* TX start << 16 | insert */
+	u32 app2;	/* TX csum */
+	u32 app3;
+	u32 app4;	/* skb for TX length for RX */
+};
+
+struct temac_local {
+	struct net_device *ndev;
+	struct device *dev;
+
+	/* Connection to PHY device */
+	struct phy_device *phy_dev;	/* Pointer to PHY device */
+	struct device_node *phy_node;
+
+	/* MDIO bus data */
+	struct mii_bus *mii_bus;	/* MII bus reference */
+	int mdio_irqs[PHY_MAX_ADDR];	/* IRQs table for MDIO bus */
+
+	/* IO registers, dma functions and IRQs */
+	void __iomem *regs;
+	void __iomem *sdma_regs;
+#ifdef CONFIG_PPC_DCR
+	dcr_host_t sdma_dcrs;
+#endif
+	u32 (*dma_in)(struct temac_local *, int);
+	void (*dma_out)(struct temac_local *, int, u32);
+
+	int tx_irq;
+	int rx_irq;
+	int emac_num;
+
+	struct sk_buff **rx_skb;
+	spinlock_t rx_lock;
+	struct mutex indirect_mutex;
+	u32 options;			/* Current options word */
+	int last_link;
+	unsigned int temac_features;
+
+	/* Buffer descriptors */
+	struct cdmac_bd *tx_bd_v;
+	dma_addr_t tx_bd_p;
+	struct cdmac_bd *rx_bd_v;
+	dma_addr_t rx_bd_p;
+	int tx_bd_ci;
+	int tx_bd_next;
+	int tx_bd_tail;
+	int rx_bd_ci;
+};
+
+/* xilinx_temac.c */
+u32 temac_ior(struct temac_local *lp, int offset);
+void temac_iow(struct temac_local *lp, int offset, u32 value);
+int temac_indirect_busywait(struct temac_local *lp);
+u32 temac_indirect_in32(struct temac_local *lp, int reg);
+void temac_indirect_out32(struct temac_local *lp, int reg, u32 value);
+
+
+/* xilinx_temac_mdio.c */
+int temac_mdio_setup(struct temac_local *lp, struct device_node *np);
+void temac_mdio_teardown(struct temac_local *lp);
+
+#endif /* XILINX_LL_TEMAC_H */
diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
new file mode 100644
index 00000000000..728fe414147
--- /dev/null
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -0,0 +1,1154 @@
+/*
+ * 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");
diff --git a/drivers/net/ethernet/xilinx/ll_temac_mdio.c b/drivers/net/ethernet/xilinx/ll_temac_mdio.c
new file mode 100644
index 00000000000..8cf9d4f56bb
--- /dev/null
+++ b/drivers/net/ethernet/xilinx/ll_temac_mdio.c
@@ -0,0 +1,122 @@
+/*
+ * MDIO bus driver for the Xilinx TEMAC device
+ *
+ * Copyright (c) 2009 Secret Lab Technologies, Ltd.
+ */
+
+#include <linux/io.h>
+#include <linux/netdevice.h>
+#include <linux/mutex.h>
+#include <linux/phy.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/of_mdio.h>
+
+#include "ll_temac.h"
+
+/* ---------------------------------------------------------------------
+ * MDIO Bus functions
+ */
+static int temac_mdio_read(struct mii_bus *bus, int phy_id, int reg)
+{
+	struct temac_local *lp = bus->priv;
+	u32 rc;
+
+	/* Write the PHY address to the MIIM Access Initiator register.
+	 * When the transfer completes, the PHY register value will appear
+	 * in the LSW0 register */
+	mutex_lock(&lp->indirect_mutex);
+	temac_iow(lp, XTE_LSW0_OFFSET, (phy_id << 5) | reg);
+	rc = temac_indirect_in32(lp, XTE_MIIMAI_OFFSET);
+	mutex_unlock(&lp->indirect_mutex);
+
+	dev_dbg(lp->dev, "temac_mdio_read(phy_id=%i, reg=%x) == %x\n",
+		phy_id, reg, rc);
+
+	return rc;
+}
+
+static int temac_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 val)
+{
+	struct temac_local *lp = bus->priv;
+
+	dev_dbg(lp->dev, "temac_mdio_write(phy_id=%i, reg=%x, val=%x)\n",
+		phy_id, reg, val);
+
+	/* First write the desired value into the write data register
+	 * and then write the address into the access initiator register
+	 */
+	mutex_lock(&lp->indirect_mutex);
+	temac_indirect_out32(lp, XTE_MGTDR_OFFSET, val);
+	temac_indirect_out32(lp, XTE_MIIMAI_OFFSET, (phy_id << 5) | reg);
+	mutex_unlock(&lp->indirect_mutex);
+
+	return 0;
+}
+
+int temac_mdio_setup(struct temac_local *lp, struct device_node *np)
+{
+	struct mii_bus *bus;
+	const u32 *bus_hz;
+	int clk_div;
+	int rc, size;
+	struct resource res;
+
+	/* Calculate a reasonable divisor for the clock rate */
+	clk_div = 0x3f; /* worst-case default setting */
+	bus_hz = of_get_property(np, "clock-frequency", &size);
+	if (bus_hz && size >= sizeof(*bus_hz)) {
+		clk_div = (*bus_hz) / (2500 * 1000 * 2) - 1;
+		if (clk_div < 1)
+			clk_div = 1;
+		if (clk_div > 0x3f)
+			clk_div = 0x3f;
+	}
+
+	/* Enable the MDIO bus by asserting the enable bit and writing
+	 * in the clock config */
+	mutex_lock(&lp->indirect_mutex);
+	temac_indirect_out32(lp, XTE_MC_OFFSET, 1 << 6 | clk_div);
+	mutex_unlock(&lp->indirect_mutex);
+
+	bus = mdiobus_alloc();
+	if (!bus)
+		return -ENOMEM;
+
+	of_address_to_resource(np, 0, &res);
+	snprintf(bus->id, MII_BUS_ID_SIZE, "%.8llx",
+		 (unsigned long long)res.start);
+	bus->priv = lp;
+	bus->name = "Xilinx TEMAC MDIO";
+	bus->read = temac_mdio_read;
+	bus->write = temac_mdio_write;
+	bus->parent = lp->dev;
+	bus->irq = lp->mdio_irqs; /* preallocated IRQ table */
+
+	lp->mii_bus = bus;
+
+	rc = of_mdiobus_register(bus, np);
+	if (rc)
+		goto err_register;
+
+	mutex_lock(&lp->indirect_mutex);
+	dev_dbg(lp->dev, "MDIO bus registered;  MC:%x\n",
+		temac_indirect_in32(lp, XTE_MC_OFFSET));
+	mutex_unlock(&lp->indirect_mutex);
+	return 0;
+
+ err_register:
+	mdiobus_free(bus);
+	return rc;
+}
+
+void temac_mdio_teardown(struct temac_local *lp)
+{
+	mdiobus_unregister(lp->mii_bus);
+	kfree(lp->mii_bus->irq);
+	mdiobus_free(lp->mii_bus);
+	lp->mii_bus = NULL;
+}
+
diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
new file mode 100644
index 00000000000..8018d7d045b
--- /dev/null
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -0,0 +1,1330 @@
+/*
+ * Xilinx EmacLite Linux driver for the Xilinx Ethernet MAC Lite device.
+ *
+ * This is a new flat driver which is based on the original emac_lite
+ * driver from John Williams <john.williams@petalogix.com>.
+ *
+ * 2007-2009 (c) Xilinx, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/phy.h>
+#include <linux/interrupt.h>
+
+#define DRIVER_NAME "xilinx_emaclite"
+
+/* Register offsets for the EmacLite Core */
+#define XEL_TXBUFF_OFFSET 	0x0		/* Transmit Buffer */
+#define XEL_MDIOADDR_OFFSET	0x07E4		/* MDIO Address Register */
+#define XEL_MDIOWR_OFFSET	0x07E8		/* MDIO Write Data Register */
+#define XEL_MDIORD_OFFSET	0x07EC		/* MDIO Read Data Register */
+#define XEL_MDIOCTRL_OFFSET	0x07F0		/* MDIO Control Register */
+#define XEL_GIER_OFFSET		0x07F8		/* GIE Register */
+#define XEL_TSR_OFFSET		0x07FC		/* Tx status */
+#define XEL_TPLR_OFFSET		0x07F4		/* Tx packet length */
+
+#define XEL_RXBUFF_OFFSET	0x1000		/* Receive Buffer */
+#define XEL_RPLR_OFFSET		0x100C		/* Rx packet length */
+#define XEL_RSR_OFFSET		0x17FC		/* Rx status */
+
+#define XEL_BUFFER_OFFSET	0x0800		/* Next Tx/Rx buffer's offset */
+
+/* MDIO Address Register Bit Masks */
+#define XEL_MDIOADDR_REGADR_MASK  0x0000001F	/* Register Address */
+#define XEL_MDIOADDR_PHYADR_MASK  0x000003E0	/* PHY Address */
+#define XEL_MDIOADDR_PHYADR_SHIFT 5
+#define XEL_MDIOADDR_OP_MASK	  0x00000400	/* RD/WR Operation */
+
+/* MDIO Write Data Register Bit Masks */
+#define XEL_MDIOWR_WRDATA_MASK	  0x0000FFFF	/* Data to be Written */
+
+/* MDIO Read Data Register Bit Masks */
+#define XEL_MDIORD_RDDATA_MASK	  0x0000FFFF	/* Data to be Read */
+
+/* MDIO Control Register Bit Masks */
+#define XEL_MDIOCTRL_MDIOSTS_MASK 0x00000001	/* MDIO Status Mask */
+#define XEL_MDIOCTRL_MDIOEN_MASK  0x00000008	/* MDIO Enable */
+
+/* Global Interrupt Enable Register (GIER) Bit Masks */
+#define XEL_GIER_GIE_MASK	0x80000000 	/* Global Enable */
+
+/* Transmit Status Register (TSR) Bit Masks */
+#define XEL_TSR_XMIT_BUSY_MASK	 0x00000001 	/* Tx complete */
+#define XEL_TSR_PROGRAM_MASK	 0x00000002 	/* Program the MAC address */
+#define XEL_TSR_XMIT_IE_MASK	 0x00000008 	/* Tx interrupt enable bit */
+#define XEL_TSR_XMIT_ACTIVE_MASK 0x80000000 	/* Buffer is active, SW bit
+						 * only. This is not documented
+						 * in the HW spec */
+
+/* Define for programming the MAC address into the EmacLite */
+#define XEL_TSR_PROG_MAC_ADDR	(XEL_TSR_XMIT_BUSY_MASK | XEL_TSR_PROGRAM_MASK)
+
+/* Receive Status Register (RSR) */
+#define XEL_RSR_RECV_DONE_MASK	0x00000001 	/* Rx complete */
+#define XEL_RSR_RECV_IE_MASK	0x00000008 	/* Rx interrupt enable bit */
+
+/* Transmit Packet Length Register (TPLR) */
+#define XEL_TPLR_LENGTH_MASK	0x0000FFFF 	/* Tx packet length */
+
+/* Receive Packet Length Register (RPLR) */
+#define XEL_RPLR_LENGTH_MASK	0x0000FFFF 	/* Rx packet length */
+
+#define XEL_HEADER_OFFSET	12 		/* Offset to length field */
+#define XEL_HEADER_SHIFT	16 		/* Shift value for length */
+
+/* General Ethernet Definitions */
+#define XEL_ARP_PACKET_SIZE		28 	/* Max ARP packet size */
+#define XEL_HEADER_IP_LENGTH_OFFSET	16 	/* IP Length Offset */
+
+
+
+#define TX_TIMEOUT		(60*HZ)		/* Tx timeout is 60 seconds. */
+#define ALIGNMENT		4
+
+/* BUFFER_ALIGN(adr) calculates the number of bytes to the next alignment. */
+#define BUFFER_ALIGN(adr) ((ALIGNMENT - ((u32) adr)) % ALIGNMENT)
+
+/**
+ * struct net_local - Our private per device data
+ * @ndev:		instance of the network device
+ * @tx_ping_pong:	indicates whether Tx Pong buffer is configured in HW
+ * @rx_ping_pong:	indicates whether Rx Pong buffer is configured in HW
+ * @next_tx_buf_to_use:	next Tx buffer to write to
+ * @next_rx_buf_to_use:	next Rx buffer to read from
+ * @base_addr:		base address of the Emaclite device
+ * @reset_lock:		lock used for synchronization
+ * @deferred_skb:	holds an skb (for transmission at a later time) when the
+ *			Tx buffer is not free
+ * @phy_dev:		pointer to the PHY device
+ * @phy_node:		pointer to the PHY device node
+ * @mii_bus:		pointer to the MII bus
+ * @mdio_irqs:		IRQs table for MDIO bus
+ * @last_link:		last link status
+ * @has_mdio:		indicates whether MDIO is included in the HW
+ */
+struct net_local {
+
+	struct net_device *ndev;
+
+	bool tx_ping_pong;
+	bool rx_ping_pong;
+	u32 next_tx_buf_to_use;
+	u32 next_rx_buf_to_use;
+	void __iomem *base_addr;
+
+	spinlock_t reset_lock;
+	struct sk_buff *deferred_skb;
+
+	struct phy_device *phy_dev;
+	struct device_node *phy_node;
+
+	struct mii_bus *mii_bus;
+	int mdio_irqs[PHY_MAX_ADDR];
+
+	int last_link;
+	bool has_mdio;
+};
+
+
+/*************************/
+/* EmacLite driver calls */
+/*************************/
+
+/**
+ * xemaclite_enable_interrupts - Enable the interrupts for the EmacLite device
+ * @drvdata:	Pointer to the Emaclite device private data
+ *
+ * This function enables the Tx and Rx interrupts for the Emaclite device along
+ * with the Global Interrupt Enable.
+ */
+static void xemaclite_enable_interrupts(struct net_local *drvdata)
+{
+	u32 reg_data;
+
+	/* Enable the Tx interrupts for the first Buffer */
+	reg_data = in_be32(drvdata->base_addr + XEL_TSR_OFFSET);
+	out_be32(drvdata->base_addr + XEL_TSR_OFFSET,
+		 reg_data | XEL_TSR_XMIT_IE_MASK);
+
+	/* Enable the Tx interrupts for the second Buffer if
+	 * configured in HW */
+	if (drvdata->tx_ping_pong != 0) {
+		reg_data = in_be32(drvdata->base_addr +
+				   XEL_BUFFER_OFFSET + XEL_TSR_OFFSET);
+		out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET +
+			 XEL_TSR_OFFSET,
+			 reg_data | XEL_TSR_XMIT_IE_MASK);
+	}
+
+	/* Enable the Rx interrupts for the first buffer */
+	out_be32(drvdata->base_addr + XEL_RSR_OFFSET,
+		 XEL_RSR_RECV_IE_MASK);
+
+	/* Enable the Rx interrupts for the second Buffer if
+	 * configured in HW */
+	if (drvdata->rx_ping_pong != 0) {
+		out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET +
+			 XEL_RSR_OFFSET,
+			 XEL_RSR_RECV_IE_MASK);
+	}
+
+	/* Enable the Global Interrupt Enable */
+	out_be32(drvdata->base_addr + XEL_GIER_OFFSET, XEL_GIER_GIE_MASK);
+}
+
+/**
+ * xemaclite_disable_interrupts - Disable the interrupts for the EmacLite device
+ * @drvdata:	Pointer to the Emaclite device private data
+ *
+ * This function disables the Tx and Rx interrupts for the Emaclite device,
+ * along with the Global Interrupt Enable.
+ */
+static void xemaclite_disable_interrupts(struct net_local *drvdata)
+{
+	u32 reg_data;
+
+	/* Disable the Global Interrupt Enable */
+	out_be32(drvdata->base_addr + XEL_GIER_OFFSET, XEL_GIER_GIE_MASK);
+
+	/* Disable the Tx interrupts for the first buffer */
+	reg_data = in_be32(drvdata->base_addr + XEL_TSR_OFFSET);
+	out_be32(drvdata->base_addr + XEL_TSR_OFFSET,
+		 reg_data & (~XEL_TSR_XMIT_IE_MASK));
+
+	/* Disable the Tx interrupts for the second Buffer
+	 * if configured in HW */
+	if (drvdata->tx_ping_pong != 0) {
+		reg_data = in_be32(drvdata->base_addr + XEL_BUFFER_OFFSET +
+				   XEL_TSR_OFFSET);
+		out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET +
+			 XEL_TSR_OFFSET,
+			 reg_data & (~XEL_TSR_XMIT_IE_MASK));
+	}
+
+	/* Disable the Rx interrupts for the first buffer */
+	reg_data = in_be32(drvdata->base_addr + XEL_RSR_OFFSET);
+	out_be32(drvdata->base_addr + XEL_RSR_OFFSET,
+		 reg_data & (~XEL_RSR_RECV_IE_MASK));
+
+	/* Disable the Rx interrupts for the second buffer
+	 * if configured in HW */
+	if (drvdata->rx_ping_pong != 0) {
+
+		reg_data = in_be32(drvdata->base_addr + XEL_BUFFER_OFFSET +
+				   XEL_RSR_OFFSET);
+		out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET +
+			 XEL_RSR_OFFSET,
+			 reg_data & (~XEL_RSR_RECV_IE_MASK));
+	}
+}
+
+/**
+ * xemaclite_aligned_write - Write from 16-bit aligned to 32-bit aligned address
+ * @src_ptr:	Void pointer to the 16-bit aligned source address
+ * @dest_ptr:	Pointer to the 32-bit aligned destination address
+ * @length:	Number bytes to write from source to destination
+ *
+ * This function writes data from a 16-bit aligned buffer to a 32-bit aligned
+ * address in the EmacLite device.
+ */
+static void xemaclite_aligned_write(void *src_ptr, u32 *dest_ptr,
+				    unsigned length)
+{
+	u32 align_buffer;
+	u32 *to_u32_ptr;
+	u16 *from_u16_ptr, *to_u16_ptr;
+
+	to_u32_ptr = dest_ptr;
+	from_u16_ptr = src_ptr;
+	align_buffer = 0;
+
+	for (; length > 3; length -= 4) {
+		to_u16_ptr = (u16 *)&align_buffer;
+		*to_u16_ptr++ = *from_u16_ptr++;
+		*to_u16_ptr++ = *from_u16_ptr++;
+
+		/* Output a word */
+		*to_u32_ptr++ = align_buffer;
+	}
+	if (length) {
+		u8 *from_u8_ptr, *to_u8_ptr;
+
+		/* Set up to output the remaining data */
+		align_buffer = 0;
+		to_u8_ptr = (u8 *) &align_buffer;
+		from_u8_ptr = (u8 *) from_u16_ptr;
+
+		/* Output the remaining data */
+		for (; length > 0; length--)
+			*to_u8_ptr++ = *from_u8_ptr++;
+
+		*to_u32_ptr = align_buffer;
+	}
+}
+
+/**
+ * xemaclite_aligned_read - Read from 32-bit aligned to 16-bit aligned buffer
+ * @src_ptr:	Pointer to the 32-bit aligned source address
+ * @dest_ptr:	Pointer to the 16-bit aligned destination address
+ * @length:	Number bytes to read from source to destination
+ *
+ * This function reads data from a 32-bit aligned address in the EmacLite device
+ * to a 16-bit aligned buffer.
+ */
+static void xemaclite_aligned_read(u32 *src_ptr, u8 *dest_ptr,
+				   unsigned length)
+{
+	u16 *to_u16_ptr, *from_u16_ptr;
+	u32 *from_u32_ptr;
+	u32 align_buffer;
+
+	from_u32_ptr = src_ptr;
+	to_u16_ptr = (u16 *) dest_ptr;
+
+	for (; length > 3; length -= 4) {
+		/* Copy each word into the temporary buffer */
+		align_buffer = *from_u32_ptr++;
+		from_u16_ptr = (u16 *)&align_buffer;
+
+		/* Read data from source */
+		*to_u16_ptr++ = *from_u16_ptr++;
+		*to_u16_ptr++ = *from_u16_ptr++;
+	}
+
+	if (length) {
+		u8 *to_u8_ptr, *from_u8_ptr;
+
+		/* Set up to read the remaining data */
+		to_u8_ptr = (u8 *) to_u16_ptr;
+		align_buffer = *from_u32_ptr++;
+		from_u8_ptr = (u8 *) &align_buffer;
+
+		/* Read the remaining data */
+		for (; length > 0; length--)
+			*to_u8_ptr = *from_u8_ptr;
+	}
+}
+
+/**
+ * xemaclite_send_data - Send an Ethernet frame
+ * @drvdata:	Pointer to the Emaclite device private data
+ * @data:	Pointer to the data to be sent
+ * @byte_count:	Total frame size, including header
+ *
+ * This function checks if the Tx buffer of the Emaclite device is free to send
+ * data. If so, it fills the Tx buffer with data for transmission. Otherwise, it
+ * returns an error.
+ *
+ * Return:	0 upon success or -1 if the buffer(s) are full.
+ *
+ * Note:	The maximum Tx packet size can not be more than Ethernet header
+ *		(14 Bytes) + Maximum MTU (1500 bytes). This is excluding FCS.
+ */
+static int xemaclite_send_data(struct net_local *drvdata, u8 *data,
+			       unsigned int byte_count)
+{
+	u32 reg_data;
+	void __iomem *addr;
+
+	/* Determine the expected Tx buffer address */
+	addr = drvdata->base_addr + drvdata->next_tx_buf_to_use;
+
+	/* If the length is too large, truncate it */
+	if (byte_count > ETH_FRAME_LEN)
+		byte_count = ETH_FRAME_LEN;
+
+	/* Check if the expected buffer is available */
+	reg_data = in_be32(addr + XEL_TSR_OFFSET);
+	if ((reg_data & (XEL_TSR_XMIT_BUSY_MASK |
+	     XEL_TSR_XMIT_ACTIVE_MASK)) == 0) {
+
+		/* Switch to next buffer if configured */
+		if (drvdata->tx_ping_pong != 0)
+			drvdata->next_tx_buf_to_use ^= XEL_BUFFER_OFFSET;
+	} else if (drvdata->tx_ping_pong != 0) {
+		/* If the expected buffer is full, try the other buffer,
+		 * if it is configured in HW */
+
+		addr = (void __iomem __force *)((u32 __force)addr ^
+						 XEL_BUFFER_OFFSET);
+		reg_data = in_be32(addr + XEL_TSR_OFFSET);
+
+		if ((reg_data & (XEL_TSR_XMIT_BUSY_MASK |
+		     XEL_TSR_XMIT_ACTIVE_MASK)) != 0)
+			return -1; /* Buffers were full, return failure */
+	} else
+		return -1; /* Buffer was full, return failure */
+
+	/* Write the frame to the buffer */
+	xemaclite_aligned_write(data, (u32 __force *) addr, byte_count);
+
+	out_be32(addr + XEL_TPLR_OFFSET, (byte_count & XEL_TPLR_LENGTH_MASK));
+
+	/* Update the Tx Status Register to indicate that there is a
+	 * frame to send. Set the XEL_TSR_XMIT_ACTIVE_MASK flag which
+	 * is used by the interrupt handler to check whether a frame
+	 * has been transmitted */
+	reg_data = in_be32(addr + XEL_TSR_OFFSET);
+	reg_data |= (XEL_TSR_XMIT_BUSY_MASK | XEL_TSR_XMIT_ACTIVE_MASK);
+	out_be32(addr + XEL_TSR_OFFSET, reg_data);
+
+	return 0;
+}
+
+/**
+ * xemaclite_recv_data - Receive a frame
+ * @drvdata:	Pointer to the Emaclite device private data
+ * @data:	Address where the data is to be received
+ *
+ * This function is intended to be called from the interrupt context or
+ * with a wrapper which waits for the receive frame to be available.
+ *
+ * Return:	Total number of bytes received
+ */
+static u16 xemaclite_recv_data(struct net_local *drvdata, u8 *data)
+{
+	void __iomem *addr;
+	u16 length, proto_type;
+	u32 reg_data;
+
+	/* Determine the expected buffer address */
+	addr = (drvdata->base_addr + drvdata->next_rx_buf_to_use);
+
+	/* Verify which buffer has valid data */
+	reg_data = in_be32(addr + XEL_RSR_OFFSET);
+
+	if ((reg_data & XEL_RSR_RECV_DONE_MASK) == XEL_RSR_RECV_DONE_MASK) {
+		if (drvdata->rx_ping_pong != 0)
+			drvdata->next_rx_buf_to_use ^= XEL_BUFFER_OFFSET;
+	} else {
+		/* The instance is out of sync, try other buffer if other
+		 * buffer is configured, return 0 otherwise. If the instance is
+		 * out of sync, do not update the 'next_rx_buf_to_use' since it
+		 * will correct on subsequent calls */
+		if (drvdata->rx_ping_pong != 0)
+			addr = (void __iomem __force *)((u32 __force)addr ^
+							 XEL_BUFFER_OFFSET);
+		else
+			return 0;	/* No data was available */
+
+		/* Verify that buffer has valid data */
+		reg_data = in_be32(addr + XEL_RSR_OFFSET);
+		if ((reg_data & XEL_RSR_RECV_DONE_MASK) !=
+		     XEL_RSR_RECV_DONE_MASK)
+			return 0;	/* No data was available */
+	}
+
+	/* Get the protocol type of the ethernet frame that arrived */
+	proto_type = ((ntohl(in_be32(addr + XEL_HEADER_OFFSET +
+			XEL_RXBUFF_OFFSET)) >> XEL_HEADER_SHIFT) &
+			XEL_RPLR_LENGTH_MASK);
+
+	/* Check if received ethernet frame is a raw ethernet frame
+	 * or an IP packet or an ARP packet */
+	if (proto_type > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
+
+		if (proto_type == ETH_P_IP) {
+			length = ((ntohl(in_be32(addr +
+					XEL_HEADER_IP_LENGTH_OFFSET +
+					XEL_RXBUFF_OFFSET)) >>
+					XEL_HEADER_SHIFT) &
+					XEL_RPLR_LENGTH_MASK);
+			length += ETH_HLEN + ETH_FCS_LEN;
+
+		} else if (proto_type == ETH_P_ARP)
+			length = XEL_ARP_PACKET_SIZE + ETH_HLEN + ETH_FCS_LEN;
+		else
+			/* Field contains type other than IP or ARP, use max
+			 * frame size and let user parse it */
+			length = ETH_FRAME_LEN + ETH_FCS_LEN;
+	} else
+		/* Use the length in the frame, plus the header and trailer */
+		length = proto_type + ETH_HLEN + ETH_FCS_LEN;
+
+	/* Read from the EmacLite device */
+	xemaclite_aligned_read((u32 __force *) (addr + XEL_RXBUFF_OFFSET),
+				data, length);
+
+	/* Acknowledge the frame */
+	reg_data = in_be32(addr + XEL_RSR_OFFSET);
+	reg_data &= ~XEL_RSR_RECV_DONE_MASK;
+	out_be32(addr + XEL_RSR_OFFSET, reg_data);
+
+	return length;
+}
+
+/**
+ * xemaclite_update_address - Update the MAC address in the device
+ * @drvdata:	Pointer to the Emaclite device private data
+ * @address_ptr:Pointer to the MAC address (MAC address is a 48-bit value)
+ *
+ * Tx must be idle and Rx should be idle for deterministic results.
+ * It is recommended that this function should be called after the
+ * initialization and before transmission of any packets from the device.
+ * The MAC address can be programmed using any of the two transmit
+ * buffers (if configured).
+ */
+static void xemaclite_update_address(struct net_local *drvdata,
+				     u8 *address_ptr)
+{
+	void __iomem *addr;
+	u32 reg_data;
+
+	/* Determine the expected Tx buffer address */
+	addr = drvdata->base_addr + drvdata->next_tx_buf_to_use;
+
+	xemaclite_aligned_write(address_ptr, (u32 __force *) addr, ETH_ALEN);
+
+	out_be32(addr + XEL_TPLR_OFFSET, ETH_ALEN);
+
+	/* Update the MAC address in the EmacLite */
+	reg_data = in_be32(addr + XEL_TSR_OFFSET);
+	out_be32(addr + XEL_TSR_OFFSET, reg_data | XEL_TSR_PROG_MAC_ADDR);
+
+	/* Wait for EmacLite to finish with the MAC address update */
+	while ((in_be32(addr + XEL_TSR_OFFSET) &
+		XEL_TSR_PROG_MAC_ADDR) != 0)
+		;
+}
+
+/**
+ * xemaclite_set_mac_address - Set the MAC address for this device
+ * @dev:	Pointer to the network device instance
+ * @addr:	Void pointer to the sockaddr structure
+ *
+ * This function copies the HW address from the sockaddr strucutre to the
+ * net_device structure and updates the address in HW.
+ *
+ * Return:	Error if the net device is busy or 0 if the addr is set
+ *		successfully
+ */
+static int xemaclite_set_mac_address(struct net_device *dev, void *address)
+{
+	struct net_local *lp = netdev_priv(dev);
+	struct sockaddr *addr = address;
+
+	if (netif_running(dev))
+		return -EBUSY;
+
+	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+	xemaclite_update_address(lp, dev->dev_addr);
+	return 0;
+}
+
+/**
+ * xemaclite_tx_timeout - Callback for Tx Timeout
+ * @dev:	Pointer to the network device
+ *
+ * This function is called when Tx time out occurs for Emaclite device.
+ */
+static void xemaclite_tx_timeout(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	unsigned long flags;
+
+	dev_err(&lp->ndev->dev, "Exceeded transmit timeout of %lu ms\n",
+		TX_TIMEOUT * 1000UL / HZ);
+
+	dev->stats.tx_errors++;
+
+	/* Reset the device */
+	spin_lock_irqsave(&lp->reset_lock, flags);
+
+	/* Shouldn't really be necessary, but shouldn't hurt */
+	netif_stop_queue(dev);
+
+	xemaclite_disable_interrupts(lp);
+	xemaclite_enable_interrupts(lp);
+
+	if (lp->deferred_skb) {
+		dev_kfree_skb(lp->deferred_skb);
+		lp->deferred_skb = NULL;
+		dev->stats.tx_errors++;
+	}
+
+	/* To exclude tx timeout */
+	dev->trans_start = jiffies; /* prevent tx timeout */
+
+	/* We're all ready to go. Start the queue */
+	netif_wake_queue(dev);
+	spin_unlock_irqrestore(&lp->reset_lock, flags);
+}
+
+/**********************/
+/* Interrupt Handlers */
+/**********************/
+
+/**
+ * xemaclite_tx_handler - Interrupt handler for frames sent
+ * @dev:	Pointer to the network device
+ *
+ * This function updates the number of packets transmitted and handles the
+ * deferred skb, if there is one.
+ */
+static void xemaclite_tx_handler(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+
+	dev->stats.tx_packets++;
+	if (lp->deferred_skb) {
+		if (xemaclite_send_data(lp,
+					(u8 *) lp->deferred_skb->data,
+					lp->deferred_skb->len) != 0)
+			return;
+		else {
+			dev->stats.tx_bytes += lp->deferred_skb->len;
+			dev_kfree_skb_irq(lp->deferred_skb);
+			lp->deferred_skb = NULL;
+			dev->trans_start = jiffies; /* prevent tx timeout */
+			netif_wake_queue(dev);
+		}
+	}
+}
+
+/**
+ * xemaclite_rx_handler- Interrupt handler for frames received
+ * @dev:	Pointer to the network device
+ *
+ * This function allocates memory for a socket buffer, fills it with data
+ * received and hands it over to the TCP/IP stack.
+ */
+static void xemaclite_rx_handler(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	struct sk_buff *skb;
+	unsigned int align;
+	u32 len;
+
+	len = ETH_FRAME_LEN + ETH_FCS_LEN;
+	skb = dev_alloc_skb(len + ALIGNMENT);
+	if (!skb) {
+		/* Couldn't get memory. */
+		dev->stats.rx_dropped++;
+		dev_err(&lp->ndev->dev, "Could not allocate receive buffer\n");
+		return;
+	}
+
+	/*
+	 * A new skb should have the data halfword aligned, but this code is
+	 * here just in case that isn't true. Calculate how many
+	 * bytes we should reserve to get the data to start on a word
+	 * boundary */
+	align = BUFFER_ALIGN(skb->data);
+	if (align)
+		skb_reserve(skb, align);
+
+	skb_reserve(skb, 2);
+
+	len = xemaclite_recv_data(lp, (u8 *) skb->data);
+
+	if (!len) {
+		dev->stats.rx_errors++;
+		dev_kfree_skb_irq(skb);
+		return;
+	}
+
+	skb_put(skb, len);	/* Tell the skb how much data we got */
+
+	skb->protocol = eth_type_trans(skb, dev);
+	skb_checksum_none_assert(skb);
+
+	dev->stats.rx_packets++;
+	dev->stats.rx_bytes += len;
+
+	if (!skb_defer_rx_timestamp(skb))
+		netif_rx(skb);	/* Send the packet upstream */
+}
+
+/**
+ * xemaclite_interrupt - Interrupt handler for this driver
+ * @irq:	Irq of the Emaclite device
+ * @dev_id:	Void pointer to the network device instance used as callback
+ *		reference
+ *
+ * This function handles the Tx and Rx interrupts of the EmacLite device.
+ */
+static irqreturn_t xemaclite_interrupt(int irq, void *dev_id)
+{
+	bool tx_complete = 0;
+	struct net_device *dev = dev_id;
+	struct net_local *lp = netdev_priv(dev);
+	void __iomem *base_addr = lp->base_addr;
+	u32 tx_status;
+
+	/* Check if there is Rx Data available */
+	if ((in_be32(base_addr + XEL_RSR_OFFSET) & XEL_RSR_RECV_DONE_MASK) ||
+			(in_be32(base_addr + XEL_BUFFER_OFFSET + XEL_RSR_OFFSET)
+			 & XEL_RSR_RECV_DONE_MASK))
+
+		xemaclite_rx_handler(dev);
+
+	/* Check if the Transmission for the first buffer is completed */
+	tx_status = in_be32(base_addr + XEL_TSR_OFFSET);
+	if (((tx_status & XEL_TSR_XMIT_BUSY_MASK) == 0) &&
+		(tx_status & XEL_TSR_XMIT_ACTIVE_MASK) != 0) {
+
+		tx_status &= ~XEL_TSR_XMIT_ACTIVE_MASK;
+		out_be32(base_addr + XEL_TSR_OFFSET, tx_status);
+
+		tx_complete = 1;
+	}
+
+	/* Check if the Transmission for the second buffer is completed */
+	tx_status = in_be32(base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET);
+	if (((tx_status & XEL_TSR_XMIT_BUSY_MASK) == 0) &&
+		(tx_status & XEL_TSR_XMIT_ACTIVE_MASK) != 0) {
+
+		tx_status &= ~XEL_TSR_XMIT_ACTIVE_MASK;
+		out_be32(base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET,
+			 tx_status);
+
+		tx_complete = 1;
+	}
+
+	/* If there was a Tx interrupt, call the Tx Handler */
+	if (tx_complete != 0)
+		xemaclite_tx_handler(dev);
+
+	return IRQ_HANDLED;
+}
+
+/**********************/
+/* MDIO Bus functions */
+/**********************/
+
+/**
+ * xemaclite_mdio_wait - Wait for the MDIO to be ready to use
+ * @lp:		Pointer to the Emaclite device private data
+ *
+ * This function waits till the device is ready to accept a new MDIO
+ * request.
+ *
+ * Return:	0 for success or ETIMEDOUT for a timeout
+ */
+
+static int xemaclite_mdio_wait(struct net_local *lp)
+{
+	long end = jiffies + 2;
+
+	/* wait for the MDIO interface to not be busy or timeout
+	   after some time.
+	*/
+	while (in_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET) &
+			XEL_MDIOCTRL_MDIOSTS_MASK) {
+		if (end - jiffies <= 0) {
+			WARN_ON(1);
+			return -ETIMEDOUT;
+		}
+		msleep(1);
+	}
+	return 0;
+}
+
+/**
+ * xemaclite_mdio_read - Read from a given MII management register
+ * @bus:	the mii_bus struct
+ * @phy_id:	the phy address
+ * @reg:	register number to read from
+ *
+ * This function waits till the device is ready to accept a new MDIO
+ * request and then writes the phy address to the MDIO Address register
+ * and reads data from MDIO Read Data register, when its available.
+ *
+ * Return:	Value read from the MII management register
+ */
+static int xemaclite_mdio_read(struct mii_bus *bus, int phy_id, int reg)
+{
+	struct net_local *lp = bus->priv;
+	u32 ctrl_reg;
+	u32 rc;
+
+	if (xemaclite_mdio_wait(lp))
+		return -ETIMEDOUT;
+
+	/* Write the PHY address, register number and set the OP bit in the
+	 * MDIO Address register. Set the Status bit in the MDIO Control
+	 * register to start a MDIO read transaction.
+	 */
+	ctrl_reg = in_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET);
+	out_be32(lp->base_addr + XEL_MDIOADDR_OFFSET,
+		 XEL_MDIOADDR_OP_MASK |
+		 ((phy_id << XEL_MDIOADDR_PHYADR_SHIFT) | reg));
+	out_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET,
+		 ctrl_reg | XEL_MDIOCTRL_MDIOSTS_MASK);
+
+	if (xemaclite_mdio_wait(lp))
+		return -ETIMEDOUT;
+
+	rc = in_be32(lp->base_addr + XEL_MDIORD_OFFSET);
+
+	dev_dbg(&lp->ndev->dev,
+		"xemaclite_mdio_read(phy_id=%i, reg=%x) == %x\n",
+		phy_id, reg, rc);
+
+	return rc;
+}
+
+/**
+ * xemaclite_mdio_write - Write to a given MII management register
+ * @bus:	the mii_bus struct
+ * @phy_id:	the phy address
+ * @reg:	register number to write to
+ * @val:	value to write to the register number specified by reg
+ *
+ * This function waits till the device is ready to accept a new MDIO
+ * request and then writes the val to the MDIO Write Data register.
+ */
+static int xemaclite_mdio_write(struct mii_bus *bus, int phy_id, int reg,
+				u16 val)
+{
+	struct net_local *lp = bus->priv;
+	u32 ctrl_reg;
+
+	dev_dbg(&lp->ndev->dev,
+		"xemaclite_mdio_write(phy_id=%i, reg=%x, val=%x)\n",
+		phy_id, reg, val);
+
+	if (xemaclite_mdio_wait(lp))
+		return -ETIMEDOUT;
+
+	/* Write the PHY address, register number and clear the OP bit in the
+	 * MDIO Address register and then write the value into the MDIO Write
+	 * Data register. Finally, set the Status bit in the MDIO Control
+	 * register to start a MDIO write transaction.
+	 */
+	ctrl_reg = in_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET);
+	out_be32(lp->base_addr + XEL_MDIOADDR_OFFSET,
+		 ~XEL_MDIOADDR_OP_MASK &
+		 ((phy_id << XEL_MDIOADDR_PHYADR_SHIFT) | reg));
+	out_be32(lp->base_addr + XEL_MDIOWR_OFFSET, val);
+	out_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET,
+		 ctrl_reg | XEL_MDIOCTRL_MDIOSTS_MASK);
+
+	return 0;
+}
+
+/**
+ * xemaclite_mdio_reset - Reset the mdio bus.
+ * @bus:	Pointer to the MII bus
+ *
+ * This function is required(?) as per Documentation/networking/phy.txt.
+ * There is no reset in this device; this function always returns 0.
+ */
+static int xemaclite_mdio_reset(struct mii_bus *bus)
+{
+	return 0;
+}
+
+/**
+ * xemaclite_mdio_setup - Register mii_bus for the Emaclite device
+ * @lp:		Pointer to the Emaclite device private data
+ * @ofdev:	Pointer to OF device structure
+ *
+ * This function enables MDIO bus in the Emaclite device and registers a
+ * mii_bus.
+ *
+ * Return:	0 upon success or a negative error upon failure
+ */
+static int xemaclite_mdio_setup(struct net_local *lp, struct device *dev)
+{
+	struct mii_bus *bus;
+	int rc;
+	struct resource res;
+	struct device_node *np = of_get_parent(lp->phy_node);
+
+	/* Don't register the MDIO bus if the phy_node or its parent node
+	 * can't be found.
+	 */
+	if (!np)
+		return -ENODEV;
+
+	/* Enable the MDIO bus by asserting the enable bit in MDIO Control
+	 * register.
+	 */
+	out_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET,
+		 XEL_MDIOCTRL_MDIOEN_MASK);
+
+	bus = mdiobus_alloc();
+	if (!bus)
+		return -ENOMEM;
+
+	of_address_to_resource(np, 0, &res);
+	snprintf(bus->id, MII_BUS_ID_SIZE, "%.8llx",
+		 (unsigned long long)res.start);
+	bus->priv = lp;
+	bus->name = "Xilinx Emaclite MDIO";
+	bus->read = xemaclite_mdio_read;
+	bus->write = xemaclite_mdio_write;
+	bus->reset = xemaclite_mdio_reset;
+	bus->parent = dev;
+	bus->irq = lp->mdio_irqs; /* preallocated IRQ table */
+
+	lp->mii_bus = bus;
+
+	rc = of_mdiobus_register(bus, np);
+	if (rc)
+		goto err_register;
+
+	return 0;
+
+err_register:
+	mdiobus_free(bus);
+	return rc;
+}
+
+/**
+ * xemaclite_adjust_link - Link state callback for the Emaclite device
+ * @ndev: pointer to net_device struct
+ *
+ * There's nothing in the Emaclite device to be configured when the link
+ * state changes. We just print the status.
+ */
+void xemaclite_adjust_link(struct net_device *ndev)
+{
+	struct net_local *lp = netdev_priv(ndev);
+	struct phy_device *phy = lp->phy_dev;
+	int link_state;
+
+	/* hash together the state values to decide if something has changed */
+	link_state = phy->speed | (phy->duplex << 1) | phy->link;
+
+	if (lp->last_link != link_state) {
+		lp->last_link = link_state;
+		phy_print_status(phy);
+	}
+}
+
+/**
+ * xemaclite_open - Open the network device
+ * @dev:	Pointer to the network device
+ *
+ * This function sets the MAC address, requests an IRQ and enables interrupts
+ * for the Emaclite device and starts the Tx queue.
+ * It also connects to the phy device, if MDIO is included in Emaclite device.
+ */
+static int xemaclite_open(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	int retval;
+
+	/* Just to be safe, stop the device first */
+	xemaclite_disable_interrupts(lp);
+
+	if (lp->phy_node) {
+		u32 bmcr;
+
+		lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node,
+					     xemaclite_adjust_link, 0,
+					     PHY_INTERFACE_MODE_MII);
+		if (!lp->phy_dev) {
+			dev_err(&lp->ndev->dev, "of_phy_connect() failed\n");
+			return -ENODEV;
+		}
+
+		/* EmacLite doesn't support giga-bit speeds */
+		lp->phy_dev->supported &= (PHY_BASIC_FEATURES);
+		lp->phy_dev->advertising = lp->phy_dev->supported;
+
+		/* Don't advertise 1000BASE-T Full/Half duplex speeds */
+		phy_write(lp->phy_dev, MII_CTRL1000, 0);
+
+		/* Advertise only 10 and 100mbps full/half duplex speeds */
+		phy_write(lp->phy_dev, MII_ADVERTISE, ADVERTISE_ALL);
+
+		/* Restart auto negotiation */
+		bmcr = phy_read(lp->phy_dev, MII_BMCR);
+		bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
+		phy_write(lp->phy_dev, MII_BMCR, bmcr);
+
+		phy_start(lp->phy_dev);
+	}
+
+	/* Set the MAC address each time opened */
+	xemaclite_update_address(lp, dev->dev_addr);
+
+	/* Grab the IRQ */
+	retval = request_irq(dev->irq, xemaclite_interrupt, 0, dev->name, dev);
+	if (retval) {
+		dev_err(&lp->ndev->dev, "Could not allocate interrupt %d\n",
+			dev->irq);
+		if (lp->phy_dev)
+			phy_disconnect(lp->phy_dev);
+		lp->phy_dev = NULL;
+
+		return retval;
+	}
+
+	/* Enable Interrupts */
+	xemaclite_enable_interrupts(lp);
+
+	/* We're ready to go */
+	netif_start_queue(dev);
+
+	return 0;
+}
+
+/**
+ * xemaclite_close - Close the network device
+ * @dev:	Pointer to the network device
+ *
+ * This function stops the Tx queue, disables interrupts and frees the IRQ for
+ * the Emaclite device.
+ * It also disconnects the phy device associated with the Emaclite device.
+ */
+static int xemaclite_close(struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+
+	netif_stop_queue(dev);
+	xemaclite_disable_interrupts(lp);
+	free_irq(dev->irq, dev);
+
+	if (lp->phy_dev)
+		phy_disconnect(lp->phy_dev);
+	lp->phy_dev = NULL;
+
+	return 0;
+}
+
+/**
+ * xemaclite_send - Transmit a frame
+ * @orig_skb:	Pointer to the socket buffer to be transmitted
+ * @dev:	Pointer to the network device
+ *
+ * This function checks if the Tx buffer of the Emaclite device is free to send
+ * data. If so, it fills the Tx buffer with data from socket buffer data,
+ * updates the stats and frees the socket buffer. The Tx completion is signaled
+ * by an interrupt. If the Tx buffer isn't free, then the socket buffer is
+ * deferred and the Tx queue is stopped so that the deferred socket buffer can
+ * be transmitted when the Emaclite device is free to transmit data.
+ *
+ * Return:	0, always.
+ */
+static int xemaclite_send(struct sk_buff *orig_skb, struct net_device *dev)
+{
+	struct net_local *lp = netdev_priv(dev);
+	struct sk_buff *new_skb;
+	unsigned int len;
+	unsigned long flags;
+
+	len = orig_skb->len;
+
+	new_skb = orig_skb;
+
+	spin_lock_irqsave(&lp->reset_lock, flags);
+	if (xemaclite_send_data(lp, (u8 *) new_skb->data, len) != 0) {
+		/* If the Emaclite Tx buffer is busy, stop the Tx queue and
+		 * defer the skb for transmission during the ISR, after the
+		 * current transmission is complete */
+		netif_stop_queue(dev);
+		lp->deferred_skb = new_skb;
+		/* Take the time stamp now, since we can't do this in an ISR. */
+		skb_tx_timestamp(new_skb);
+		spin_unlock_irqrestore(&lp->reset_lock, flags);
+		return 0;
+	}
+	spin_unlock_irqrestore(&lp->reset_lock, flags);
+
+	skb_tx_timestamp(new_skb);
+
+	dev->stats.tx_bytes += len;
+	dev_kfree_skb(new_skb);
+
+	return 0;
+}
+
+/**
+ * xemaclite_remove_ndev - Free the network device
+ * @ndev:	Pointer to the network device to be freed
+ *
+ * This function un maps the IO region of the Emaclite device and frees the net
+ * device.
+ */
+static void xemaclite_remove_ndev(struct net_device *ndev)
+{
+	if (ndev) {
+		struct net_local *lp = netdev_priv(ndev);
+
+		if (lp->base_addr)
+			iounmap((void __iomem __force *) (lp->base_addr));
+		free_netdev(ndev);
+	}
+}
+
+/**
+ * get_bool - Get a parameter from the OF device
+ * @ofdev:	Pointer to OF device structure
+ * @s:		Property to be retrieved
+ *
+ * This function looks for a property in the device node and returns the value
+ * of the property if its found or 0 if the property is not found.
+ *
+ * Return:	Value of the parameter if the parameter is found, or 0 otherwise
+ */
+static bool get_bool(struct platform_device *ofdev, const char *s)
+{
+	u32 *p = (u32 *)of_get_property(ofdev->dev.of_node, s, NULL);
+
+	if (p) {
+		return (bool)*p;
+	} else {
+		dev_warn(&ofdev->dev, "Parameter %s not found,"
+			"defaulting to false\n", s);
+		return 0;
+	}
+}
+
+static struct net_device_ops xemaclite_netdev_ops;
+
+/**
+ * xemaclite_of_probe - Probe method for the Emaclite device.
+ * @ofdev:	Pointer to OF device structure
+ * @match:	Pointer to the structure used for matching a device
+ *
+ * This function probes for the Emaclite device in the device tree.
+ * It initializes the driver data structure and the hardware, sets the MAC
+ * address and registers the network device.
+ * It also registers a mii_bus for the Emaclite device, if MDIO is included
+ * in the device.
+ *
+ * Return:	0, if the driver is bound to the Emaclite device, or
+ *		a negative error if there is failure.
+ */
+static int __devinit xemaclite_of_probe(struct platform_device *ofdev)
+{
+	struct resource r_irq; /* Interrupt resources */
+	struct resource r_mem; /* IO mem resources */
+	struct net_device *ndev = NULL;
+	struct net_local *lp = NULL;
+	struct device *dev = &ofdev->dev;
+	const void *mac_address;
+
+	int rc = 0;
+
+	dev_info(dev, "Device Tree Probing\n");
+
+	/* Get iospace for the device */
+	rc = of_address_to_resource(ofdev->dev.of_node, 0, &r_mem);
+	if (rc) {
+		dev_err(dev, "invalid address\n");
+		return rc;
+	}
+
+	/* Get IRQ for the device */
+	rc = of_irq_to_resource(ofdev->dev.of_node, 0, &r_irq);
+	if (rc == NO_IRQ) {
+		dev_err(dev, "no IRQ found\n");
+		return rc;
+	}
+
+	/* Create an ethernet device instance */
+	ndev = alloc_etherdev(sizeof(struct net_local));
+	if (!ndev) {
+		dev_err(dev, "Could not allocate network device\n");
+		return -ENOMEM;
+	}
+
+	dev_set_drvdata(dev, ndev);
+	SET_NETDEV_DEV(ndev, &ofdev->dev);
+
+	ndev->irq = r_irq.start;
+	ndev->mem_start = r_mem.start;
+	ndev->mem_end = r_mem.end;
+
+	lp = netdev_priv(ndev);
+	lp->ndev = ndev;
+
+	if (!request_mem_region(ndev->mem_start,
+				ndev->mem_end - ndev->mem_start + 1,
+				DRIVER_NAME)) {
+		dev_err(dev, "Couldn't lock memory region at %p\n",
+			(void *)ndev->mem_start);
+		rc = -EBUSY;
+		goto error2;
+	}
+
+	/* Get the virtual base address for the device */
+	lp->base_addr = ioremap(r_mem.start, resource_size(&r_mem));
+	if (NULL == lp->base_addr) {
+		dev_err(dev, "EmacLite: Could not allocate iomem\n");
+		rc = -EIO;
+		goto error1;
+	}
+
+	spin_lock_init(&lp->reset_lock);
+	lp->next_tx_buf_to_use = 0x0;
+	lp->next_rx_buf_to_use = 0x0;
+	lp->tx_ping_pong = get_bool(ofdev, "xlnx,tx-ping-pong");
+	lp->rx_ping_pong = get_bool(ofdev, "xlnx,rx-ping-pong");
+	mac_address = of_get_mac_address(ofdev->dev.of_node);
+
+	if (mac_address)
+		/* Set the MAC address. */
+		memcpy(ndev->dev_addr, mac_address, 6);
+	else
+		dev_warn(dev, "No MAC address found\n");
+
+	/* Clear the Tx CSR's in case this is a restart */
+	out_be32(lp->base_addr + XEL_TSR_OFFSET, 0);
+	out_be32(lp->base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET, 0);
+
+	/* Set the MAC address in the EmacLite device */
+	xemaclite_update_address(lp, ndev->dev_addr);
+
+	lp->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0);
+	rc = xemaclite_mdio_setup(lp, &ofdev->dev);
+	if (rc)
+		dev_warn(&ofdev->dev, "error registering MDIO bus\n");
+
+	dev_info(dev, "MAC address is now %pM\n", ndev->dev_addr);
+
+	ndev->netdev_ops = &xemaclite_netdev_ops;
+	ndev->flags &= ~IFF_MULTICAST;
+	ndev->watchdog_timeo = TX_TIMEOUT;
+
+	/* Finally, register the device */
+	rc = register_netdev(ndev);
+	if (rc) {
+		dev_err(dev,
+			"Cannot register network device, aborting\n");
+		goto error1;
+	}
+
+	dev_info(dev,
+		 "Xilinx EmacLite at 0x%08X mapped to 0x%08X, irq=%d\n",
+		 (unsigned int __force)ndev->mem_start,
+		 (unsigned int __force)lp->base_addr, ndev->irq);
+	return 0;
+
+error1:
+	release_mem_region(ndev->mem_start, resource_size(&r_mem));
+
+error2:
+	xemaclite_remove_ndev(ndev);
+	return rc;
+}
+
+/**
+ * xemaclite_of_remove - Unbind the driver from the Emaclite device.
+ * @of_dev:	Pointer to OF device structure
+ *
+ * This function is called if a device is physically removed from the system or
+ * if the driver module is being unloaded. It frees any resources allocated to
+ * the device.
+ *
+ * Return:	0, always.
+ */
+static int __devexit xemaclite_of_remove(struct platform_device *of_dev)
+{
+	struct device *dev = &of_dev->dev;
+	struct net_device *ndev = dev_get_drvdata(dev);
+
+	struct net_local *lp = netdev_priv(ndev);
+
+	/* Un-register the mii_bus, if configured */
+	if (lp->has_mdio) {
+		mdiobus_unregister(lp->mii_bus);
+		kfree(lp->mii_bus->irq);
+		mdiobus_free(lp->mii_bus);
+		lp->mii_bus = NULL;
+	}
+
+	unregister_netdev(ndev);
+
+	if (lp->phy_node)
+		of_node_put(lp->phy_node);
+	lp->phy_node = NULL;
+
+	release_mem_region(ndev->mem_start, ndev->mem_end-ndev->mem_start + 1);
+
+	xemaclite_remove_ndev(ndev);
+	dev_set_drvdata(dev, NULL);
+
+	return 0;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void
+xemaclite_poll_controller(struct net_device *ndev)
+{
+	disable_irq(ndev->irq);
+	xemaclite_interrupt(ndev->irq, ndev);
+	enable_irq(ndev->irq);
+}
+#endif
+
+static struct net_device_ops xemaclite_netdev_ops = {
+	.ndo_open		= xemaclite_open,
+	.ndo_stop		= xemaclite_close,
+	.ndo_start_xmit		= xemaclite_send,
+	.ndo_set_mac_address	= xemaclite_set_mac_address,
+	.ndo_tx_timeout		= xemaclite_tx_timeout,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller = xemaclite_poll_controller,
+#endif
+};
+
+/* Match table for OF platform binding */
+static struct of_device_id xemaclite_of_match[] __devinitdata = {
+	{ .compatible = "xlnx,opb-ethernetlite-1.01.a", },
+	{ .compatible = "xlnx,opb-ethernetlite-1.01.b", },
+	{ .compatible = "xlnx,xps-ethernetlite-1.00.a", },
+	{ .compatible = "xlnx,xps-ethernetlite-2.00.a", },
+	{ .compatible = "xlnx,xps-ethernetlite-2.01.a", },
+	{ .compatible = "xlnx,xps-ethernetlite-3.00.a", },
+	{ /* end of list */ },
+};
+MODULE_DEVICE_TABLE(of, xemaclite_of_match);
+
+static struct platform_driver xemaclite_of_driver = {
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+		.of_match_table = xemaclite_of_match,
+	},
+	.probe		= xemaclite_of_probe,
+	.remove		= __devexit_p(xemaclite_of_remove),
+};
+
+/**
+ * xgpiopss_init - Initial driver registration call
+ *
+ * Return:	0 upon success, or a negative error upon failure.
+ */
+static int __init xemaclite_init(void)
+{
+	/* No kernel boot options used, we just need to register the driver */
+	return platform_driver_register(&xemaclite_of_driver);
+}
+
+/**
+ * xemaclite_cleanup - Driver un-registration call
+ */
+static void __exit xemaclite_cleanup(void)
+{
+	platform_driver_unregister(&xemaclite_of_driver);
+}
+
+module_init(xemaclite_init);
+module_exit(xemaclite_cleanup);
+
+MODULE_AUTHOR("Xilinx, Inc.");
+MODULE_DESCRIPTION("Xilinx Ethernet MAC Lite driver");
+MODULE_LICENSE("GPL");