From 8df158ac36fa0937f51c372f0c2d0ad1b86ebe4c Mon Sep 17 00:00:00 2001
From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Sat, 30 Jul 2011 00:36:02 -0700
Subject: toshiba: Move the Toshiba drivers

Move the Toshiba ethernet drivers into drivers/net/ethernet/toshiba
and make the necessary Kconfig and Makefile changes.

CC: Geoff Levand <geoff@infradead.org>
CC: Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
CC: Ishizaki Kou <kou.ishizaki@toshiba.co.jp>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/toshiba/tc35815.c | 2228 ++++++++++++++++++++++++++++++++
 1 file changed, 2228 insertions(+)
 create mode 100644 drivers/net/ethernet/toshiba/tc35815.c

(limited to 'drivers/net/ethernet/toshiba/tc35815.c')

diff --git a/drivers/net/ethernet/toshiba/tc35815.c b/drivers/net/ethernet/toshiba/tc35815.c
new file mode 100644
index 000000000000..4a55a162dfe6
--- /dev/null
+++ b/drivers/net/ethernet/toshiba/tc35815.c
@@ -0,0 +1,2228 @@
+/*
+ * tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
+ *
+ * Based on skelton.c by Donald Becker.
+ *
+ * This driver is a replacement of older and less maintained version.
+ * This is a header of the older version:
+ *	-----<snip>-----
+ *	Copyright 2001 MontaVista Software Inc.
+ *	Author: MontaVista Software, Inc.
+ *		ahennessy@mvista.com
+ *	Copyright (C) 2000-2001 Toshiba Corporation
+ *	static const char *version =
+ *		"tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
+ *	-----<snip>-----
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * (C) Copyright TOSHIBA CORPORATION 2004-2005
+ * All Rights Reserved.
+ */
+
+#define DRV_VERSION	"1.39"
+static const char *version = "tc35815.c:v" DRV_VERSION "\n";
+#define MODNAME			"tc35815"
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/if_vlan.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/phy.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+#include <linux/prefetch.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+
+enum tc35815_chiptype {
+	TC35815CF = 0,
+	TC35815_NWU,
+	TC35815_TX4939,
+};
+
+/* indexed by tc35815_chiptype, above */
+static const struct {
+	const char *name;
+} chip_info[] __devinitdata = {
+	{ "TOSHIBA TC35815CF 10/100BaseTX" },
+	{ "TOSHIBA TC35815 with Wake on LAN" },
+	{ "TOSHIBA TC35815/TX4939" },
+};
+
+static DEFINE_PCI_DEVICE_TABLE(tc35815_pci_tbl) = {
+	{PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
+	{PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
+	{PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
+	{0,}
+};
+MODULE_DEVICE_TABLE(pci, tc35815_pci_tbl);
+
+/* see MODULE_PARM_DESC */
+static struct tc35815_options {
+	int speed;
+	int duplex;
+} options;
+
+/*
+ * Registers
+ */
+struct tc35815_regs {
+	__u32 DMA_Ctl;		/* 0x00 */
+	__u32 TxFrmPtr;
+	__u32 TxThrsh;
+	__u32 TxPollCtr;
+	__u32 BLFrmPtr;
+	__u32 RxFragSize;
+	__u32 Int_En;
+	__u32 FDA_Bas;
+	__u32 FDA_Lim;		/* 0x20 */
+	__u32 Int_Src;
+	__u32 unused0[2];
+	__u32 PauseCnt;
+	__u32 RemPauCnt;
+	__u32 TxCtlFrmStat;
+	__u32 unused1;
+	__u32 MAC_Ctl;		/* 0x40 */
+	__u32 CAM_Ctl;
+	__u32 Tx_Ctl;
+	__u32 Tx_Stat;
+	__u32 Rx_Ctl;
+	__u32 Rx_Stat;
+	__u32 MD_Data;
+	__u32 MD_CA;
+	__u32 CAM_Adr;		/* 0x60 */
+	__u32 CAM_Data;
+	__u32 CAM_Ena;
+	__u32 PROM_Ctl;
+	__u32 PROM_Data;
+	__u32 Algn_Cnt;
+	__u32 CRC_Cnt;
+	__u32 Miss_Cnt;
+};
+
+/*
+ * Bit assignments
+ */
+/* DMA_Ctl bit assign ------------------------------------------------------- */
+#define DMA_RxAlign	       0x00c00000 /* 1:Reception Alignment	     */
+#define DMA_RxAlign_1	       0x00400000
+#define DMA_RxAlign_2	       0x00800000
+#define DMA_RxAlign_3	       0x00c00000
+#define DMA_M66EnStat	       0x00080000 /* 1:66MHz Enable State	     */
+#define DMA_IntMask	       0x00040000 /* 1:Interrupt mask		     */
+#define DMA_SWIntReq	       0x00020000 /* 1:Software Interrupt request    */
+#define DMA_TxWakeUp	       0x00010000 /* 1:Transmit Wake Up		     */
+#define DMA_RxBigE	       0x00008000 /* 1:Receive Big Endian	     */
+#define DMA_TxBigE	       0x00004000 /* 1:Transmit Big Endian	     */
+#define DMA_TestMode	       0x00002000 /* 1:Test Mode		     */
+#define DMA_PowrMgmnt	       0x00001000 /* 1:Power Management		     */
+#define DMA_DmBurst_Mask       0x000001fc /* DMA Burst size		     */
+
+/* RxFragSize bit assign ---------------------------------------------------- */
+#define RxFrag_EnPack	       0x00008000 /* 1:Enable Packing		     */
+#define RxFrag_MinFragMask     0x00000ffc /* Minimum Fragment		     */
+
+/* MAC_Ctl bit assign ------------------------------------------------------- */
+#define MAC_Link10	       0x00008000 /* 1:Link Status 10Mbits	     */
+#define MAC_EnMissRoll	       0x00002000 /* 1:Enable Missed Roll	     */
+#define MAC_MissRoll	       0x00000400 /* 1:Missed Roll		     */
+#define MAC_Loop10	       0x00000080 /* 1:Loop 10 Mbps		     */
+#define MAC_Conn_Auto	       0x00000000 /*00:Connection mode (Automatic)   */
+#define MAC_Conn_10M	       0x00000020 /*01:		       (10Mbps endec)*/
+#define MAC_Conn_Mll	       0x00000040 /*10:		       (Mll clock)   */
+#define MAC_MacLoop	       0x00000010 /* 1:MAC Loopback		     */
+#define MAC_FullDup	       0x00000008 /* 1:Full Duplex 0:Half Duplex     */
+#define MAC_Reset	       0x00000004 /* 1:Software Reset		     */
+#define MAC_HaltImm	       0x00000002 /* 1:Halt Immediate		     */
+#define MAC_HaltReq	       0x00000001 /* 1:Halt request		     */
+
+/* PROM_Ctl bit assign ------------------------------------------------------ */
+#define PROM_Busy	       0x00008000 /* 1:Busy (Start Operation)	     */
+#define PROM_Read	       0x00004000 /*10:Read operation		     */
+#define PROM_Write	       0x00002000 /*01:Write operation		     */
+#define PROM_Erase	       0x00006000 /*11:Erase operation		     */
+					  /*00:Enable or Disable Writting,   */
+					  /*	  as specified in PROM_Addr. */
+#define PROM_Addr_Ena	       0x00000030 /*11xxxx:PROM Write enable	     */
+					  /*00xxxx:	      disable	     */
+
+/* CAM_Ctl bit assign ------------------------------------------------------- */
+#define CAM_CompEn	       0x00000010 /* 1:CAM Compare Enable	     */
+#define CAM_NegCAM	       0x00000008 /* 1:Reject packets CAM recognizes,*/
+					  /*			accept other */
+#define CAM_BroadAcc	       0x00000004 /* 1:Broadcast assept		     */
+#define CAM_GroupAcc	       0x00000002 /* 1:Multicast assept		     */
+#define CAM_StationAcc	       0x00000001 /* 1:unicast accept		     */
+
+/* CAM_Ena bit assign ------------------------------------------------------- */
+#define CAM_ENTRY_MAX		       21   /* CAM Data entry max count	     */
+#define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits)  */
+#define CAM_Ena_Bit(index)	(1 << (index))
+#define CAM_ENTRY_DESTINATION	0
+#define CAM_ENTRY_SOURCE	1
+#define CAM_ENTRY_MACCTL	20
+
+/* Tx_Ctl bit assign -------------------------------------------------------- */
+#define Tx_En		       0x00000001 /* 1:Transmit enable		     */
+#define Tx_TxHalt	       0x00000002 /* 1:Transmit Halt Request	     */
+#define Tx_NoPad	       0x00000004 /* 1:Suppress Padding		     */
+#define Tx_NoCRC	       0x00000008 /* 1:Suppress Padding		     */
+#define Tx_FBack	       0x00000010 /* 1:Fast Back-off		     */
+#define Tx_EnUnder	       0x00000100 /* 1:Enable Underrun		     */
+#define Tx_EnExDefer	       0x00000200 /* 1:Enable Excessive Deferral     */
+#define Tx_EnLCarr	       0x00000400 /* 1:Enable Lost Carrier	     */
+#define Tx_EnExColl	       0x00000800 /* 1:Enable Excessive Collision    */
+#define Tx_EnLateColl	       0x00001000 /* 1:Enable Late Collision	     */
+#define Tx_EnTxPar	       0x00002000 /* 1:Enable Transmit Parity	     */
+#define Tx_EnComp	       0x00004000 /* 1:Enable Completion	     */
+
+/* Tx_Stat bit assign ------------------------------------------------------- */
+#define Tx_TxColl_MASK	       0x0000000F /* Tx Collision Count		     */
+#define Tx_ExColl	       0x00000010 /* Excessive Collision	     */
+#define Tx_TXDefer	       0x00000020 /* Transmit Defered		     */
+#define Tx_Paused	       0x00000040 /* Transmit Paused		     */
+#define Tx_IntTx	       0x00000080 /* Interrupt on Tx		     */
+#define Tx_Under	       0x00000100 /* Underrun			     */
+#define Tx_Defer	       0x00000200 /* Deferral			     */
+#define Tx_NCarr	       0x00000400 /* No Carrier			     */
+#define Tx_10Stat	       0x00000800 /* 10Mbps Status		     */
+#define Tx_LateColl	       0x00001000 /* Late Collision		     */
+#define Tx_TxPar	       0x00002000 /* Tx Parity Error		     */
+#define Tx_Comp		       0x00004000 /* Completion			     */
+#define Tx_Halted	       0x00008000 /* Tx Halted			     */
+#define Tx_SQErr	       0x00010000 /* Signal Quality Error(SQE)	     */
+
+/* Rx_Ctl bit assign -------------------------------------------------------- */
+#define Rx_EnGood	       0x00004000 /* 1:Enable Good		     */
+#define Rx_EnRxPar	       0x00002000 /* 1:Enable Receive Parity	     */
+#define Rx_EnLongErr	       0x00000800 /* 1:Enable Long Error	     */
+#define Rx_EnOver	       0x00000400 /* 1:Enable OverFlow		     */
+#define Rx_EnCRCErr	       0x00000200 /* 1:Enable CRC Error		     */
+#define Rx_EnAlign	       0x00000100 /* 1:Enable Alignment		     */
+#define Rx_IgnoreCRC	       0x00000040 /* 1:Ignore CRC Value		     */
+#define Rx_StripCRC	       0x00000010 /* 1:Strip CRC Value		     */
+#define Rx_ShortEn	       0x00000008 /* 1:Short Enable		     */
+#define Rx_LongEn	       0x00000004 /* 1:Long Enable		     */
+#define Rx_RxHalt	       0x00000002 /* 1:Receive Halt Request	     */
+#define Rx_RxEn		       0x00000001 /* 1:Receive Intrrupt Enable	     */
+
+/* Rx_Stat bit assign ------------------------------------------------------- */
+#define Rx_Halted	       0x00008000 /* Rx Halted			     */
+#define Rx_Good		       0x00004000 /* Rx Good			     */
+#define Rx_RxPar	       0x00002000 /* Rx Parity Error		     */
+#define Rx_TypePkt	       0x00001000 /* Rx Type Packet		     */
+#define Rx_LongErr	       0x00000800 /* Rx Long Error		     */
+#define Rx_Over		       0x00000400 /* Rx Overflow		     */
+#define Rx_CRCErr	       0x00000200 /* Rx CRC Error		     */
+#define Rx_Align	       0x00000100 /* Rx Alignment Error		     */
+#define Rx_10Stat	       0x00000080 /* Rx 10Mbps Status		     */
+#define Rx_IntRx	       0x00000040 /* Rx Interrupt		     */
+#define Rx_CtlRecd	       0x00000020 /* Rx Control Receive		     */
+#define Rx_InLenErr	       0x00000010 /* Rx In Range Frame Length Error  */
+
+#define Rx_Stat_Mask	       0x0000FFF0 /* Rx All Status Mask		     */
+
+/* Int_En bit assign -------------------------------------------------------- */
+#define Int_NRAbtEn	       0x00000800 /* 1:Non-recoverable Abort Enable  */
+#define Int_TxCtlCmpEn	       0x00000400 /* 1:Transmit Ctl Complete Enable  */
+#define Int_DmParErrEn	       0x00000200 /* 1:DMA Parity Error Enable	     */
+#define Int_DParDEn	       0x00000100 /* 1:Data Parity Error Enable	     */
+#define Int_EarNotEn	       0x00000080 /* 1:Early Notify Enable	     */
+#define Int_DParErrEn	       0x00000040 /* 1:Detected Parity Error Enable  */
+#define Int_SSysErrEn	       0x00000020 /* 1:Signalled System Error Enable */
+#define Int_RMasAbtEn	       0x00000010 /* 1:Received Master Abort Enable  */
+#define Int_RTargAbtEn	       0x00000008 /* 1:Received Target Abort Enable  */
+#define Int_STargAbtEn	       0x00000004 /* 1:Signalled Target Abort Enable */
+#define Int_BLExEn	       0x00000002 /* 1:Buffer List Exhausted Enable  */
+#define Int_FDAExEn	       0x00000001 /* 1:Free Descriptor Area	     */
+					  /*		   Exhausted Enable  */
+
+/* Int_Src bit assign ------------------------------------------------------- */
+#define Int_NRabt	       0x00004000 /* 1:Non Recoverable error	     */
+#define Int_DmParErrStat       0x00002000 /* 1:DMA Parity Error & Clear	     */
+#define Int_BLEx	       0x00001000 /* 1:Buffer List Empty & Clear     */
+#define Int_FDAEx	       0x00000800 /* 1:FDA Empty & Clear	     */
+#define Int_IntNRAbt	       0x00000400 /* 1:Non Recoverable Abort	     */
+#define Int_IntCmp	       0x00000200 /* 1:MAC control packet complete   */
+#define Int_IntExBD	       0x00000100 /* 1:Interrupt Extra BD & Clear    */
+#define Int_DmParErr	       0x00000080 /* 1:DMA Parity Error & Clear	     */
+#define Int_IntEarNot	       0x00000040 /* 1:Receive Data write & Clear    */
+#define Int_SWInt	       0x00000020 /* 1:Software request & Clear	     */
+#define Int_IntBLEx	       0x00000010 /* 1:Buffer List Empty & Clear     */
+#define Int_IntFDAEx	       0x00000008 /* 1:FDA Empty & Clear	     */
+#define Int_IntPCI	       0x00000004 /* 1:PCI controller & Clear	     */
+#define Int_IntMacRx	       0x00000002 /* 1:Rx controller & Clear	     */
+#define Int_IntMacTx	       0x00000001 /* 1:Tx controller & Clear	     */
+
+/* MD_CA bit assign --------------------------------------------------------- */
+#define MD_CA_PreSup	       0x00001000 /* 1:Preamble Suppress		     */
+#define MD_CA_Busy	       0x00000800 /* 1:Busy (Start Operation)	     */
+#define MD_CA_Wr	       0x00000400 /* 1:Write 0:Read		     */
+
+
+/*
+ * Descriptors
+ */
+
+/* Frame descripter */
+struct FDesc {
+	volatile __u32 FDNext;
+	volatile __u32 FDSystem;
+	volatile __u32 FDStat;
+	volatile __u32 FDCtl;
+};
+
+/* Buffer descripter */
+struct BDesc {
+	volatile __u32 BuffData;
+	volatile __u32 BDCtl;
+};
+
+#define FD_ALIGN	16
+
+/* Frame Descripter bit assign ---------------------------------------------- */
+#define FD_FDLength_MASK       0x0000FFFF /* Length MASK		     */
+#define FD_BDCnt_MASK	       0x001F0000 /* BD count MASK in FD	     */
+#define FD_FrmOpt_MASK	       0x7C000000 /* Frame option MASK		     */
+#define FD_FrmOpt_BigEndian    0x40000000 /* Tx/Rx */
+#define FD_FrmOpt_IntTx	       0x20000000 /* Tx only */
+#define FD_FrmOpt_NoCRC	       0x10000000 /* Tx only */
+#define FD_FrmOpt_NoPadding    0x08000000 /* Tx only */
+#define FD_FrmOpt_Packing      0x04000000 /* Rx only */
+#define FD_CownsFD	       0x80000000 /* FD Controller owner bit	     */
+#define FD_Next_EOL	       0x00000001 /* FD EOL indicator		     */
+#define FD_BDCnt_SHIFT	       16
+
+/* Buffer Descripter bit assign --------------------------------------------- */
+#define BD_BuffLength_MASK     0x0000FFFF /* Receive Data Size		     */
+#define BD_RxBDID_MASK	       0x00FF0000 /* BD ID Number MASK		     */
+#define BD_RxBDSeqN_MASK       0x7F000000 /* Rx BD Sequence Number	     */
+#define BD_CownsBD	       0x80000000 /* BD Controller owner bit	     */
+#define BD_RxBDID_SHIFT	       16
+#define BD_RxBDSeqN_SHIFT      24
+
+
+/* Some useful constants. */
+
+#define TX_CTL_CMD	(Tx_EnTxPar | Tx_EnLateColl | \
+	Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
+	Tx_En)	/* maybe  0x7b01 */
+/* Do not use Rx_StripCRC -- it causes trouble on BLEx/FDAEx condition */
+#define RX_CTL_CMD	(Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
+	| Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn) /* maybe 0x6f01 */
+#define INT_EN_CMD  (Int_NRAbtEn | \
+	Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
+	Int_SSysErrEn  | Int_RMasAbtEn | Int_RTargAbtEn | \
+	Int_STargAbtEn | \
+	Int_BLExEn  | Int_FDAExEn) /* maybe 0xb7f*/
+#define DMA_CTL_CMD	DMA_BURST_SIZE
+#define HAVE_DMA_RXALIGN(lp)	likely((lp)->chiptype != TC35815CF)
+
+/* Tuning parameters */
+#define DMA_BURST_SIZE	32
+#define TX_THRESHOLD	1024
+/* used threshold with packet max byte for low pci transfer ability.*/
+#define TX_THRESHOLD_MAX 1536
+/* setting threshold max value when overrun error occurred this count. */
+#define TX_THRESHOLD_KEEP_LIMIT 10
+
+/* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
+#define FD_PAGE_NUM 4
+#define RX_BUF_NUM	128	/* < 256 */
+#define RX_FD_NUM	256	/* >= 32 */
+#define TX_FD_NUM	128
+#if RX_CTL_CMD & Rx_LongEn
+#define RX_BUF_SIZE	PAGE_SIZE
+#elif RX_CTL_CMD & Rx_StripCRC
+#define RX_BUF_SIZE	\
+	L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + NET_IP_ALIGN)
+#else
+#define RX_BUF_SIZE	\
+	L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN + NET_IP_ALIGN)
+#endif
+#define RX_FD_RESERVE	(2 / 2)	/* max 2 BD per RxFD */
+#define NAPI_WEIGHT	16
+
+struct TxFD {
+	struct FDesc fd;
+	struct BDesc bd;
+	struct BDesc unused;
+};
+
+struct RxFD {
+	struct FDesc fd;
+	struct BDesc bd[0];	/* variable length */
+};
+
+struct FrFD {
+	struct FDesc fd;
+	struct BDesc bd[RX_BUF_NUM];
+};
+
+
+#define tc_readl(addr)	ioread32(addr)
+#define tc_writel(d, addr)	iowrite32(d, addr)
+
+#define TC35815_TX_TIMEOUT  msecs_to_jiffies(400)
+
+/* Information that need to be kept for each controller. */
+struct tc35815_local {
+	struct pci_dev *pci_dev;
+
+	struct net_device *dev;
+	struct napi_struct napi;
+
+	/* statistics */
+	struct {
+		int max_tx_qlen;
+		int tx_ints;
+		int rx_ints;
+		int tx_underrun;
+	} lstats;
+
+	/* Tx control lock.  This protects the transmit buffer ring
+	 * state along with the "tx full" state of the driver.  This
+	 * means all netif_queue flow control actions are protected
+	 * by this lock as well.
+	 */
+	spinlock_t lock;
+	spinlock_t rx_lock;
+
+	struct mii_bus *mii_bus;
+	struct phy_device *phy_dev;
+	int duplex;
+	int speed;
+	int link;
+	struct work_struct restart_work;
+
+	/*
+	 * Transmitting: Batch Mode.
+	 *	1 BD in 1 TxFD.
+	 * Receiving: Non-Packing Mode.
+	 *	1 circular FD for Free Buffer List.
+	 *	RX_BUF_NUM BD in Free Buffer FD.
+	 *	One Free Buffer BD has ETH_FRAME_LEN data buffer.
+	 */
+	void *fd_buf;	/* for TxFD, RxFD, FrFD */
+	dma_addr_t fd_buf_dma;
+	struct TxFD *tfd_base;
+	unsigned int tfd_start;
+	unsigned int tfd_end;
+	struct RxFD *rfd_base;
+	struct RxFD *rfd_limit;
+	struct RxFD *rfd_cur;
+	struct FrFD *fbl_ptr;
+	unsigned int fbl_count;
+	struct {
+		struct sk_buff *skb;
+		dma_addr_t skb_dma;
+	} tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
+	u32 msg_enable;
+	enum tc35815_chiptype chiptype;
+};
+
+static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
+{
+	return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
+}
+#ifdef DEBUG
+static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
+{
+	return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
+}
+#endif
+static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
+				       struct pci_dev *hwdev,
+				       dma_addr_t *dma_handle)
+{
+	struct sk_buff *skb;
+	skb = dev_alloc_skb(RX_BUF_SIZE);
+	if (!skb)
+		return NULL;
+	*dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
+				     PCI_DMA_FROMDEVICE);
+	if (pci_dma_mapping_error(hwdev, *dma_handle)) {
+		dev_kfree_skb_any(skb);
+		return NULL;
+	}
+	skb_reserve(skb, 2);	/* make IP header 4byte aligned */
+	return skb;
+}
+
+static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
+{
+	pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
+			 PCI_DMA_FROMDEVICE);
+	dev_kfree_skb_any(skb);
+}
+
+/* Index to functions, as function prototypes. */
+
+static int	tc35815_open(struct net_device *dev);
+static int	tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t	tc35815_interrupt(int irq, void *dev_id);
+static int	tc35815_rx(struct net_device *dev, int limit);
+static int	tc35815_poll(struct napi_struct *napi, int budget);
+static void	tc35815_txdone(struct net_device *dev);
+static int	tc35815_close(struct net_device *dev);
+static struct	net_device_stats *tc35815_get_stats(struct net_device *dev);
+static void	tc35815_set_multicast_list(struct net_device *dev);
+static void	tc35815_tx_timeout(struct net_device *dev);
+static int	tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void	tc35815_poll_controller(struct net_device *dev);
+#endif
+static const struct ethtool_ops tc35815_ethtool_ops;
+
+/* Example routines you must write ;->. */
+static void	tc35815_chip_reset(struct net_device *dev);
+static void	tc35815_chip_init(struct net_device *dev);
+
+#ifdef DEBUG
+static void	panic_queues(struct net_device *dev);
+#endif
+
+static void tc35815_restart_work(struct work_struct *work);
+
+static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+{
+	struct net_device *dev = bus->priv;
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	unsigned long timeout = jiffies + HZ;
+
+	tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA);
+	udelay(12); /* it takes 32 x 400ns at least */
+	while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
+		if (time_after(jiffies, timeout))
+			return -EIO;
+		cpu_relax();
+	}
+	return tc_readl(&tr->MD_Data) & 0xffff;
+}
+
+static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val)
+{
+	struct net_device *dev = bus->priv;
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	unsigned long timeout = jiffies + HZ;
+
+	tc_writel(val, &tr->MD_Data);
+	tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f),
+		  &tr->MD_CA);
+	udelay(12); /* it takes 32 x 400ns at least */
+	while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
+		if (time_after(jiffies, timeout))
+			return -EIO;
+		cpu_relax();
+	}
+	return 0;
+}
+
+static void tc_handle_link_change(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct phy_device *phydev = lp->phy_dev;
+	unsigned long flags;
+	int status_change = 0;
+
+	spin_lock_irqsave(&lp->lock, flags);
+	if (phydev->link &&
+	    (lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
+		struct tc35815_regs __iomem *tr =
+			(struct tc35815_regs __iomem *)dev->base_addr;
+		u32 reg;
+
+		reg = tc_readl(&tr->MAC_Ctl);
+		reg |= MAC_HaltReq;
+		tc_writel(reg, &tr->MAC_Ctl);
+		if (phydev->duplex == DUPLEX_FULL)
+			reg |= MAC_FullDup;
+		else
+			reg &= ~MAC_FullDup;
+		tc_writel(reg, &tr->MAC_Ctl);
+		reg &= ~MAC_HaltReq;
+		tc_writel(reg, &tr->MAC_Ctl);
+
+		/*
+		 * TX4939 PCFG.SPEEDn bit will be changed on
+		 * NETDEV_CHANGE event.
+		 */
+		/*
+		 * WORKAROUND: enable LostCrS only if half duplex
+		 * operation.
+		 * (TX4939 does not have EnLCarr)
+		 */
+		if (phydev->duplex == DUPLEX_HALF &&
+		    lp->chiptype != TC35815_TX4939)
+			tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
+				  &tr->Tx_Ctl);
+
+		lp->speed = phydev->speed;
+		lp->duplex = phydev->duplex;
+		status_change = 1;
+	}
+
+	if (phydev->link != lp->link) {
+		if (phydev->link) {
+			/* delayed promiscuous enabling */
+			if (dev->flags & IFF_PROMISC)
+				tc35815_set_multicast_list(dev);
+		} else {
+			lp->speed = 0;
+			lp->duplex = -1;
+		}
+		lp->link = phydev->link;
+
+		status_change = 1;
+	}
+	spin_unlock_irqrestore(&lp->lock, flags);
+
+	if (status_change && netif_msg_link(lp)) {
+		phy_print_status(phydev);
+		pr_debug("%s: MII BMCR %04x BMSR %04x LPA %04x\n",
+			 dev->name,
+			 phy_read(phydev, MII_BMCR),
+			 phy_read(phydev, MII_BMSR),
+			 phy_read(phydev, MII_LPA));
+	}
+}
+
+static int tc_mii_probe(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct phy_device *phydev = NULL;
+	int phy_addr;
+	u32 dropmask;
+
+	/* find the first phy */
+	for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
+		if (lp->mii_bus->phy_map[phy_addr]) {
+			if (phydev) {
+				printk(KERN_ERR "%s: multiple PHYs found\n",
+				       dev->name);
+				return -EINVAL;
+			}
+			phydev = lp->mii_bus->phy_map[phy_addr];
+			break;
+		}
+	}
+
+	if (!phydev) {
+		printk(KERN_ERR "%s: no PHY found\n", dev->name);
+		return -ENODEV;
+	}
+
+	/* attach the mac to the phy */
+	phydev = phy_connect(dev, dev_name(&phydev->dev),
+			     &tc_handle_link_change, 0,
+			     lp->chiptype == TC35815_TX4939 ?
+			     PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII);
+	if (IS_ERR(phydev)) {
+		printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
+		return PTR_ERR(phydev);
+	}
+	printk(KERN_INFO "%s: attached PHY driver [%s] "
+		"(mii_bus:phy_addr=%s, id=%x)\n",
+		dev->name, phydev->drv->name, dev_name(&phydev->dev),
+		phydev->phy_id);
+
+	/* mask with MAC supported features */
+	phydev->supported &= PHY_BASIC_FEATURES;
+	dropmask = 0;
+	if (options.speed == 10)
+		dropmask |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
+	else if (options.speed == 100)
+		dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
+	if (options.duplex == 1)
+		dropmask |= SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full;
+	else if (options.duplex == 2)
+		dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_100baseT_Half;
+	phydev->supported &= ~dropmask;
+	phydev->advertising = phydev->supported;
+
+	lp->link = 0;
+	lp->speed = 0;
+	lp->duplex = -1;
+	lp->phy_dev = phydev;
+
+	return 0;
+}
+
+static int tc_mii_init(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	int err;
+	int i;
+
+	lp->mii_bus = mdiobus_alloc();
+	if (lp->mii_bus == NULL) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	lp->mii_bus->name = "tc35815_mii_bus";
+	lp->mii_bus->read = tc_mdio_read;
+	lp->mii_bus->write = tc_mdio_write;
+	snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x",
+		 (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
+	lp->mii_bus->priv = dev;
+	lp->mii_bus->parent = &lp->pci_dev->dev;
+	lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+	if (!lp->mii_bus->irq) {
+		err = -ENOMEM;
+		goto err_out_free_mii_bus;
+	}
+
+	for (i = 0; i < PHY_MAX_ADDR; i++)
+		lp->mii_bus->irq[i] = PHY_POLL;
+
+	err = mdiobus_register(lp->mii_bus);
+	if (err)
+		goto err_out_free_mdio_irq;
+	err = tc_mii_probe(dev);
+	if (err)
+		goto err_out_unregister_bus;
+	return 0;
+
+err_out_unregister_bus:
+	mdiobus_unregister(lp->mii_bus);
+err_out_free_mdio_irq:
+	kfree(lp->mii_bus->irq);
+err_out_free_mii_bus:
+	mdiobus_free(lp->mii_bus);
+err_out:
+	return err;
+}
+
+#ifdef CONFIG_CPU_TX49XX
+/*
+ * Find a platform_device providing a MAC address.  The platform code
+ * should provide a "tc35815-mac" device with a MAC address in its
+ * platform_data.
+ */
+static int __devinit tc35815_mac_match(struct device *dev, void *data)
+{
+	struct platform_device *plat_dev = to_platform_device(dev);
+	struct pci_dev *pci_dev = data;
+	unsigned int id = pci_dev->irq;
+	return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
+}
+
+static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct device *pd = bus_find_device(&platform_bus_type, NULL,
+					    lp->pci_dev, tc35815_mac_match);
+	if (pd) {
+		if (pd->platform_data)
+			memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
+		put_device(pd);
+		return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
+	}
+	return -ENODEV;
+}
+#else
+static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
+{
+	return -ENODEV;
+}
+#endif
+
+static int __devinit tc35815_init_dev_addr(struct net_device *dev)
+{
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	int i;
+
+	while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
+		;
+	for (i = 0; i < 6; i += 2) {
+		unsigned short data;
+		tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
+		while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
+			;
+		data = tc_readl(&tr->PROM_Data);
+		dev->dev_addr[i] = data & 0xff;
+		dev->dev_addr[i+1] = data >> 8;
+	}
+	if (!is_valid_ether_addr(dev->dev_addr))
+		return tc35815_read_plat_dev_addr(dev);
+	return 0;
+}
+
+static const struct net_device_ops tc35815_netdev_ops = {
+	.ndo_open		= tc35815_open,
+	.ndo_stop		= tc35815_close,
+	.ndo_start_xmit		= tc35815_send_packet,
+	.ndo_get_stats		= tc35815_get_stats,
+	.ndo_set_multicast_list	= tc35815_set_multicast_list,
+	.ndo_tx_timeout		= tc35815_tx_timeout,
+	.ndo_do_ioctl		= tc35815_ioctl,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_set_mac_address	= eth_mac_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller	= tc35815_poll_controller,
+#endif
+};
+
+static int __devinit tc35815_init_one(struct pci_dev *pdev,
+				      const struct pci_device_id *ent)
+{
+	void __iomem *ioaddr = NULL;
+	struct net_device *dev;
+	struct tc35815_local *lp;
+	int rc;
+
+	static int printed_version;
+	if (!printed_version++) {
+		printk(version);
+		dev_printk(KERN_DEBUG, &pdev->dev,
+			   "speed:%d duplex:%d\n",
+			   options.speed, options.duplex);
+	}
+
+	if (!pdev->irq) {
+		dev_warn(&pdev->dev, "no IRQ assigned.\n");
+		return -ENODEV;
+	}
+
+	/* dev zeroed in alloc_etherdev */
+	dev = alloc_etherdev(sizeof(*lp));
+	if (dev == NULL) {
+		dev_err(&pdev->dev, "unable to alloc new ethernet\n");
+		return -ENOMEM;
+	}
+	SET_NETDEV_DEV(dev, &pdev->dev);
+	lp = netdev_priv(dev);
+	lp->dev = dev;
+
+	/* enable device (incl. PCI PM wakeup), and bus-mastering */
+	rc = pcim_enable_device(pdev);
+	if (rc)
+		goto err_out;
+	rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
+	if (rc)
+		goto err_out;
+	pci_set_master(pdev);
+	ioaddr = pcim_iomap_table(pdev)[1];
+
+	/* Initialize the device structure. */
+	dev->netdev_ops = &tc35815_netdev_ops;
+	dev->ethtool_ops = &tc35815_ethtool_ops;
+	dev->watchdog_timeo = TC35815_TX_TIMEOUT;
+	netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
+
+	dev->irq = pdev->irq;
+	dev->base_addr = (unsigned long)ioaddr;
+
+	INIT_WORK(&lp->restart_work, tc35815_restart_work);
+	spin_lock_init(&lp->lock);
+	spin_lock_init(&lp->rx_lock);
+	lp->pci_dev = pdev;
+	lp->chiptype = ent->driver_data;
+
+	lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
+	pci_set_drvdata(pdev, dev);
+
+	/* Soft reset the chip. */
+	tc35815_chip_reset(dev);
+
+	/* Retrieve the ethernet address. */
+	if (tc35815_init_dev_addr(dev)) {
+		dev_warn(&pdev->dev, "not valid ether addr\n");
+		random_ether_addr(dev->dev_addr);
+	}
+
+	rc = register_netdev(dev);
+	if (rc)
+		goto err_out;
+
+	memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
+	printk(KERN_INFO "%s: %s at 0x%lx, %pM, IRQ %d\n",
+		dev->name,
+		chip_info[ent->driver_data].name,
+		dev->base_addr,
+		dev->dev_addr,
+		dev->irq);
+
+	rc = tc_mii_init(dev);
+	if (rc)
+		goto err_out_unregister;
+
+	return 0;
+
+err_out_unregister:
+	unregister_netdev(dev);
+err_out:
+	free_netdev(dev);
+	return rc;
+}
+
+
+static void __devexit tc35815_remove_one(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	phy_disconnect(lp->phy_dev);
+	mdiobus_unregister(lp->mii_bus);
+	kfree(lp->mii_bus->irq);
+	mdiobus_free(lp->mii_bus);
+	unregister_netdev(dev);
+	free_netdev(dev);
+	pci_set_drvdata(pdev, NULL);
+}
+
+static int
+tc35815_init_queues(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	int i;
+	unsigned long fd_addr;
+
+	if (!lp->fd_buf) {
+		BUG_ON(sizeof(struct FDesc) +
+		       sizeof(struct BDesc) * RX_BUF_NUM +
+		       sizeof(struct FDesc) * RX_FD_NUM +
+		       sizeof(struct TxFD) * TX_FD_NUM >
+		       PAGE_SIZE * FD_PAGE_NUM);
+
+		lp->fd_buf = pci_alloc_consistent(lp->pci_dev,
+						  PAGE_SIZE * FD_PAGE_NUM,
+						  &lp->fd_buf_dma);
+		if (!lp->fd_buf)
+			return -ENOMEM;
+		for (i = 0; i < RX_BUF_NUM; i++) {
+			lp->rx_skbs[i].skb =
+				alloc_rxbuf_skb(dev, lp->pci_dev,
+						&lp->rx_skbs[i].skb_dma);
+			if (!lp->rx_skbs[i].skb) {
+				while (--i >= 0) {
+					free_rxbuf_skb(lp->pci_dev,
+						       lp->rx_skbs[i].skb,
+						       lp->rx_skbs[i].skb_dma);
+					lp->rx_skbs[i].skb = NULL;
+				}
+				pci_free_consistent(lp->pci_dev,
+						    PAGE_SIZE * FD_PAGE_NUM,
+						    lp->fd_buf,
+						    lp->fd_buf_dma);
+				lp->fd_buf = NULL;
+				return -ENOMEM;
+			}
+		}
+		printk(KERN_DEBUG "%s: FD buf %p DataBuf",
+		       dev->name, lp->fd_buf);
+		printk("\n");
+	} else {
+		for (i = 0; i < FD_PAGE_NUM; i++)
+			clear_page((void *)((unsigned long)lp->fd_buf +
+					    i * PAGE_SIZE));
+	}
+	fd_addr = (unsigned long)lp->fd_buf;
+
+	/* Free Descriptors (for Receive) */
+	lp->rfd_base = (struct RxFD *)fd_addr;
+	fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
+	for (i = 0; i < RX_FD_NUM; i++)
+		lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
+	lp->rfd_cur = lp->rfd_base;
+	lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
+
+	/* Transmit Descriptors */
+	lp->tfd_base = (struct TxFD *)fd_addr;
+	fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
+	for (i = 0; i < TX_FD_NUM; i++) {
+		lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
+		lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
+		lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
+	}
+	lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
+	lp->tfd_start = 0;
+	lp->tfd_end = 0;
+
+	/* Buffer List (for Receive) */
+	lp->fbl_ptr = (struct FrFD *)fd_addr;
+	lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
+	lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
+	/*
+	 * move all allocated skbs to head of rx_skbs[] array.
+	 * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
+	 * tc35815_rx() had failed.
+	 */
+	lp->fbl_count = 0;
+	for (i = 0; i < RX_BUF_NUM; i++) {
+		if (lp->rx_skbs[i].skb) {
+			if (i != lp->fbl_count) {
+				lp->rx_skbs[lp->fbl_count].skb =
+					lp->rx_skbs[i].skb;
+				lp->rx_skbs[lp->fbl_count].skb_dma =
+					lp->rx_skbs[i].skb_dma;
+			}
+			lp->fbl_count++;
+		}
+	}
+	for (i = 0; i < RX_BUF_NUM; i++) {
+		if (i >= lp->fbl_count) {
+			lp->fbl_ptr->bd[i].BuffData = 0;
+			lp->fbl_ptr->bd[i].BDCtl = 0;
+			continue;
+		}
+		lp->fbl_ptr->bd[i].BuffData =
+			cpu_to_le32(lp->rx_skbs[i].skb_dma);
+		/* BDID is index of FrFD.bd[] */
+		lp->fbl_ptr->bd[i].BDCtl =
+			cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
+				    RX_BUF_SIZE);
+	}
+
+	printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
+	       dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
+	return 0;
+}
+
+static void
+tc35815_clear_queues(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	int i;
+
+	for (i = 0; i < TX_FD_NUM; i++) {
+		u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
+		struct sk_buff *skb =
+			fdsystem != 0xffffffff ?
+			lp->tx_skbs[fdsystem].skb : NULL;
+#ifdef DEBUG
+		if (lp->tx_skbs[i].skb != skb) {
+			printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
+			panic_queues(dev);
+		}
+#else
+		BUG_ON(lp->tx_skbs[i].skb != skb);
+#endif
+		if (skb) {
+			pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
+			lp->tx_skbs[i].skb = NULL;
+			lp->tx_skbs[i].skb_dma = 0;
+			dev_kfree_skb_any(skb);
+		}
+		lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
+	}
+
+	tc35815_init_queues(dev);
+}
+
+static void
+tc35815_free_queues(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	int i;
+
+	if (lp->tfd_base) {
+		for (i = 0; i < TX_FD_NUM; i++) {
+			u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
+			struct sk_buff *skb =
+				fdsystem != 0xffffffff ?
+				lp->tx_skbs[fdsystem].skb : NULL;
+#ifdef DEBUG
+			if (lp->tx_skbs[i].skb != skb) {
+				printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
+				panic_queues(dev);
+			}
+#else
+			BUG_ON(lp->tx_skbs[i].skb != skb);
+#endif
+			if (skb) {
+				dev_kfree_skb(skb);
+				pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
+				lp->tx_skbs[i].skb = NULL;
+				lp->tx_skbs[i].skb_dma = 0;
+			}
+			lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
+		}
+	}
+
+	lp->rfd_base = NULL;
+	lp->rfd_limit = NULL;
+	lp->rfd_cur = NULL;
+	lp->fbl_ptr = NULL;
+
+	for (i = 0; i < RX_BUF_NUM; i++) {
+		if (lp->rx_skbs[i].skb) {
+			free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
+				       lp->rx_skbs[i].skb_dma);
+			lp->rx_skbs[i].skb = NULL;
+		}
+	}
+	if (lp->fd_buf) {
+		pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
+				    lp->fd_buf, lp->fd_buf_dma);
+		lp->fd_buf = NULL;
+	}
+}
+
+static void
+dump_txfd(struct TxFD *fd)
+{
+	printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
+	       le32_to_cpu(fd->fd.FDNext),
+	       le32_to_cpu(fd->fd.FDSystem),
+	       le32_to_cpu(fd->fd.FDStat),
+	       le32_to_cpu(fd->fd.FDCtl));
+	printk("BD: ");
+	printk(" %08x %08x",
+	       le32_to_cpu(fd->bd.BuffData),
+	       le32_to_cpu(fd->bd.BDCtl));
+	printk("\n");
+}
+
+static int
+dump_rxfd(struct RxFD *fd)
+{
+	int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
+	if (bd_count > 8)
+		bd_count = 8;
+	printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
+	       le32_to_cpu(fd->fd.FDNext),
+	       le32_to_cpu(fd->fd.FDSystem),
+	       le32_to_cpu(fd->fd.FDStat),
+	       le32_to_cpu(fd->fd.FDCtl));
+	if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
+		return 0;
+	printk("BD: ");
+	for (i = 0; i < bd_count; i++)
+		printk(" %08x %08x",
+		       le32_to_cpu(fd->bd[i].BuffData),
+		       le32_to_cpu(fd->bd[i].BDCtl));
+	printk("\n");
+	return bd_count;
+}
+
+#ifdef DEBUG
+static void
+dump_frfd(struct FrFD *fd)
+{
+	int i;
+	printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
+	       le32_to_cpu(fd->fd.FDNext),
+	       le32_to_cpu(fd->fd.FDSystem),
+	       le32_to_cpu(fd->fd.FDStat),
+	       le32_to_cpu(fd->fd.FDCtl));
+	printk("BD: ");
+	for (i = 0; i < RX_BUF_NUM; i++)
+		printk(" %08x %08x",
+		       le32_to_cpu(fd->bd[i].BuffData),
+		       le32_to_cpu(fd->bd[i].BDCtl));
+	printk("\n");
+}
+
+static void
+panic_queues(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	int i;
+
+	printk("TxFD base %p, start %u, end %u\n",
+	       lp->tfd_base, lp->tfd_start, lp->tfd_end);
+	printk("RxFD base %p limit %p cur %p\n",
+	       lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
+	printk("FrFD %p\n", lp->fbl_ptr);
+	for (i = 0; i < TX_FD_NUM; i++)
+		dump_txfd(&lp->tfd_base[i]);
+	for (i = 0; i < RX_FD_NUM; i++) {
+		int bd_count = dump_rxfd(&lp->rfd_base[i]);
+		i += (bd_count + 1) / 2;	/* skip BDs */
+	}
+	dump_frfd(lp->fbl_ptr);
+	panic("%s: Illegal queue state.", dev->name);
+}
+#endif
+
+static void print_eth(const u8 *add)
+{
+	printk(KERN_DEBUG "print_eth(%p)\n", add);
+	printk(KERN_DEBUG " %pM => %pM : %02x%02x\n",
+		add + 6, add, add[12], add[13]);
+}
+
+static int tc35815_tx_full(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	return (lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end;
+}
+
+static void tc35815_restart(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	if (lp->phy_dev) {
+		int timeout;
+
+		phy_write(lp->phy_dev, MII_BMCR, BMCR_RESET);
+		timeout = 100;
+		while (--timeout) {
+			if (!(phy_read(lp->phy_dev, MII_BMCR) & BMCR_RESET))
+				break;
+			udelay(1);
+		}
+		if (!timeout)
+			printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
+	}
+
+	spin_lock_bh(&lp->rx_lock);
+	spin_lock_irq(&lp->lock);
+	tc35815_chip_reset(dev);
+	tc35815_clear_queues(dev);
+	tc35815_chip_init(dev);
+	/* Reconfigure CAM again since tc35815_chip_init() initialize it. */
+	tc35815_set_multicast_list(dev);
+	spin_unlock_irq(&lp->lock);
+	spin_unlock_bh(&lp->rx_lock);
+
+	netif_wake_queue(dev);
+}
+
+static void tc35815_restart_work(struct work_struct *work)
+{
+	struct tc35815_local *lp =
+		container_of(work, struct tc35815_local, restart_work);
+	struct net_device *dev = lp->dev;
+
+	tc35815_restart(dev);
+}
+
+static void tc35815_schedule_restart(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	unsigned long flags;
+
+	/* disable interrupts */
+	spin_lock_irqsave(&lp->lock, flags);
+	tc_writel(0, &tr->Int_En);
+	tc_writel(tc_readl(&tr->DMA_Ctl) | DMA_IntMask, &tr->DMA_Ctl);
+	schedule_work(&lp->restart_work);
+	spin_unlock_irqrestore(&lp->lock, flags);
+}
+
+static void tc35815_tx_timeout(struct net_device *dev)
+{
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+
+	printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
+	       dev->name, tc_readl(&tr->Tx_Stat));
+
+	/* Try to restart the adaptor. */
+	tc35815_schedule_restart(dev);
+	dev->stats.tx_errors++;
+}
+
+/*
+ * Open/initialize the controller. This is called (in the current kernel)
+ * sometime after booting when the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even
+ * registers that "should" only need to be set once at boot, so that
+ * there is non-reboot way to recover if something goes wrong.
+ */
+static int
+tc35815_open(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	/*
+	 * This is used if the interrupt line can turned off (shared).
+	 * See 3c503.c for an example of selecting the IRQ at config-time.
+	 */
+	if (request_irq(dev->irq, tc35815_interrupt, IRQF_SHARED,
+			dev->name, dev))
+		return -EAGAIN;
+
+	tc35815_chip_reset(dev);
+
+	if (tc35815_init_queues(dev) != 0) {
+		free_irq(dev->irq, dev);
+		return -EAGAIN;
+	}
+
+	napi_enable(&lp->napi);
+
+	/* Reset the hardware here. Don't forget to set the station address. */
+	spin_lock_irq(&lp->lock);
+	tc35815_chip_init(dev);
+	spin_unlock_irq(&lp->lock);
+
+	netif_carrier_off(dev);
+	/* schedule a link state check */
+	phy_start(lp->phy_dev);
+
+	/* We are now ready to accept transmit requeusts from
+	 * the queueing layer of the networking.
+	 */
+	netif_start_queue(dev);
+
+	return 0;
+}
+
+/* This will only be invoked if your driver is _not_ in XOFF state.
+ * What this means is that you need not check it, and that this
+ * invariant will hold if you make sure that the netif_*_queue()
+ * calls are done at the proper times.
+ */
+static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct TxFD *txfd;
+	unsigned long flags;
+
+	/* If some error occurs while trying to transmit this
+	 * packet, you should return '1' from this function.
+	 * In such a case you _may not_ do anything to the
+	 * SKB, it is still owned by the network queueing
+	 * layer when an error is returned.  This means you
+	 * may not modify any SKB fields, you may not free
+	 * the SKB, etc.
+	 */
+
+	/* This is the most common case for modern hardware.
+	 * The spinlock protects this code from the TX complete
+	 * hardware interrupt handler.  Queue flow control is
+	 * thus managed under this lock as well.
+	 */
+	spin_lock_irqsave(&lp->lock, flags);
+
+	/* failsafe... (handle txdone now if half of FDs are used) */
+	if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
+	    TX_FD_NUM / 2)
+		tc35815_txdone(dev);
+
+	if (netif_msg_pktdata(lp))
+		print_eth(skb->data);
+#ifdef DEBUG
+	if (lp->tx_skbs[lp->tfd_start].skb) {
+		printk("%s: tx_skbs conflict.\n", dev->name);
+		panic_queues(dev);
+	}
+#else
+	BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
+#endif
+	lp->tx_skbs[lp->tfd_start].skb = skb;
+	lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
+
+	/*add to ring */
+	txfd = &lp->tfd_base[lp->tfd_start];
+	txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
+	txfd->bd.BDCtl = cpu_to_le32(skb->len);
+	txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
+	txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
+
+	if (lp->tfd_start == lp->tfd_end) {
+		struct tc35815_regs __iomem *tr =
+			(struct tc35815_regs __iomem *)dev->base_addr;
+		/* Start DMA Transmitter. */
+		txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
+		txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
+		if (netif_msg_tx_queued(lp)) {
+			printk("%s: starting TxFD.\n", dev->name);
+			dump_txfd(txfd);
+		}
+		tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
+	} else {
+		txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
+		if (netif_msg_tx_queued(lp)) {
+			printk("%s: queueing TxFD.\n", dev->name);
+			dump_txfd(txfd);
+		}
+	}
+	lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
+
+	/* If we just used up the very last entry in the
+	 * TX ring on this device, tell the queueing
+	 * layer to send no more.
+	 */
+	if (tc35815_tx_full(dev)) {
+		if (netif_msg_tx_queued(lp))
+			printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
+		netif_stop_queue(dev);
+	}
+
+	/* When the TX completion hw interrupt arrives, this
+	 * is when the transmit statistics are updated.
+	 */
+
+	spin_unlock_irqrestore(&lp->lock, flags);
+	return NETDEV_TX_OK;
+}
+
+#define FATAL_ERROR_INT \
+	(Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
+static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
+{
+	static int count;
+	printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
+	       dev->name, status);
+	if (status & Int_IntPCI)
+		printk(" IntPCI");
+	if (status & Int_DmParErr)
+		printk(" DmParErr");
+	if (status & Int_IntNRAbt)
+		printk(" IntNRAbt");
+	printk("\n");
+	if (count++ > 100)
+		panic("%s: Too many fatal errors.", dev->name);
+	printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
+	/* Try to restart the adaptor. */
+	tc35815_schedule_restart(dev);
+}
+
+static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	int ret = -1;
+
+	/* Fatal errors... */
+	if (status & FATAL_ERROR_INT) {
+		tc35815_fatal_error_interrupt(dev, status);
+		return 0;
+	}
+	/* recoverable errors */
+	if (status & Int_IntFDAEx) {
+		if (netif_msg_rx_err(lp))
+			dev_warn(&dev->dev,
+				 "Free Descriptor Area Exhausted (%#x).\n",
+				 status);
+		dev->stats.rx_dropped++;
+		ret = 0;
+	}
+	if (status & Int_IntBLEx) {
+		if (netif_msg_rx_err(lp))
+			dev_warn(&dev->dev,
+				 "Buffer List Exhausted (%#x).\n",
+				 status);
+		dev->stats.rx_dropped++;
+		ret = 0;
+	}
+	if (status & Int_IntExBD) {
+		if (netif_msg_rx_err(lp))
+			dev_warn(&dev->dev,
+				 "Excessive Buffer Descriptiors (%#x).\n",
+				 status);
+		dev->stats.rx_length_errors++;
+		ret = 0;
+	}
+
+	/* normal notification */
+	if (status & Int_IntMacRx) {
+		/* Got a packet(s). */
+		ret = tc35815_rx(dev, limit);
+		lp->lstats.rx_ints++;
+	}
+	if (status & Int_IntMacTx) {
+		/* Transmit complete. */
+		lp->lstats.tx_ints++;
+		spin_lock_irq(&lp->lock);
+		tc35815_txdone(dev);
+		spin_unlock_irq(&lp->lock);
+		if (ret < 0)
+			ret = 0;
+	}
+	return ret;
+}
+
+/*
+ * The typical workload of the driver:
+ * Handle the network interface interrupts.
+ */
+static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	u32 dmactl = tc_readl(&tr->DMA_Ctl);
+
+	if (!(dmactl & DMA_IntMask)) {
+		/* disable interrupts */
+		tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
+		if (napi_schedule_prep(&lp->napi))
+			__napi_schedule(&lp->napi);
+		else {
+			printk(KERN_ERR "%s: interrupt taken in poll\n",
+			       dev->name);
+			BUG();
+		}
+		(void)tc_readl(&tr->Int_Src);	/* flush */
+		return IRQ_HANDLED;
+	}
+	return IRQ_NONE;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void tc35815_poll_controller(struct net_device *dev)
+{
+	disable_irq(dev->irq);
+	tc35815_interrupt(dev->irq, dev);
+	enable_irq(dev->irq);
+}
+#endif
+
+/* We have a good packet(s), get it/them out of the buffers. */
+static int
+tc35815_rx(struct net_device *dev, int limit)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	unsigned int fdctl;
+	int i;
+	int received = 0;
+
+	while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
+		int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
+		int pkt_len = fdctl & FD_FDLength_MASK;
+		int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
+#ifdef DEBUG
+		struct RxFD *next_rfd;
+#endif
+#if (RX_CTL_CMD & Rx_StripCRC) == 0
+		pkt_len -= ETH_FCS_LEN;
+#endif
+
+		if (netif_msg_rx_status(lp))
+			dump_rxfd(lp->rfd_cur);
+		if (status & Rx_Good) {
+			struct sk_buff *skb;
+			unsigned char *data;
+			int cur_bd;
+
+			if (--limit < 0)
+				break;
+			BUG_ON(bd_count > 1);
+			cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
+				  & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
+#ifdef DEBUG
+			if (cur_bd >= RX_BUF_NUM) {
+				printk("%s: invalid BDID.\n", dev->name);
+				panic_queues(dev);
+			}
+			BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
+			       (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
+			if (!lp->rx_skbs[cur_bd].skb) {
+				printk("%s: NULL skb.\n", dev->name);
+				panic_queues(dev);
+			}
+#else
+			BUG_ON(cur_bd >= RX_BUF_NUM);
+#endif
+			skb = lp->rx_skbs[cur_bd].skb;
+			prefetch(skb->data);
+			lp->rx_skbs[cur_bd].skb = NULL;
+			pci_unmap_single(lp->pci_dev,
+					 lp->rx_skbs[cur_bd].skb_dma,
+					 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+			if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
+				memmove(skb->data, skb->data - NET_IP_ALIGN,
+					pkt_len);
+			data = skb_put(skb, pkt_len);
+			if (netif_msg_pktdata(lp))
+				print_eth(data);
+			skb->protocol = eth_type_trans(skb, dev);
+			netif_receive_skb(skb);
+			received++;
+			dev->stats.rx_packets++;
+			dev->stats.rx_bytes += pkt_len;
+		} else {
+			dev->stats.rx_errors++;
+			if (netif_msg_rx_err(lp))
+				dev_info(&dev->dev, "Rx error (status %x)\n",
+					 status & Rx_Stat_Mask);
+			/* WORKAROUND: LongErr and CRCErr means Overflow. */
+			if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
+				status &= ~(Rx_LongErr|Rx_CRCErr);
+				status |= Rx_Over;
+			}
+			if (status & Rx_LongErr)
+				dev->stats.rx_length_errors++;
+			if (status & Rx_Over)
+				dev->stats.rx_fifo_errors++;
+			if (status & Rx_CRCErr)
+				dev->stats.rx_crc_errors++;
+			if (status & Rx_Align)
+				dev->stats.rx_frame_errors++;
+		}
+
+		if (bd_count > 0) {
+			/* put Free Buffer back to controller */
+			int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
+			unsigned char id =
+				(bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
+#ifdef DEBUG
+			if (id >= RX_BUF_NUM) {
+				printk("%s: invalid BDID.\n", dev->name);
+				panic_queues(dev);
+			}
+#else
+			BUG_ON(id >= RX_BUF_NUM);
+#endif
+			/* free old buffers */
+			lp->fbl_count--;
+			while (lp->fbl_count < RX_BUF_NUM)
+			{
+				unsigned char curid =
+					(id + 1 + lp->fbl_count) % RX_BUF_NUM;
+				struct BDesc *bd = &lp->fbl_ptr->bd[curid];
+#ifdef DEBUG
+				bdctl = le32_to_cpu(bd->BDCtl);
+				if (bdctl & BD_CownsBD) {
+					printk("%s: Freeing invalid BD.\n",
+					       dev->name);
+					panic_queues(dev);
+				}
+#endif
+				/* pass BD to controller */
+				if (!lp->rx_skbs[curid].skb) {
+					lp->rx_skbs[curid].skb =
+						alloc_rxbuf_skb(dev,
+								lp->pci_dev,
+								&lp->rx_skbs[curid].skb_dma);
+					if (!lp->rx_skbs[curid].skb)
+						break; /* try on next reception */
+					bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
+				}
+				/* Note: BDLength was modified by chip. */
+				bd->BDCtl = cpu_to_le32(BD_CownsBD |
+							(curid << BD_RxBDID_SHIFT) |
+							RX_BUF_SIZE);
+				lp->fbl_count++;
+			}
+		}
+
+		/* put RxFD back to controller */
+#ifdef DEBUG
+		next_rfd = fd_bus_to_virt(lp,
+					  le32_to_cpu(lp->rfd_cur->fd.FDNext));
+		if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
+			printk("%s: RxFD FDNext invalid.\n", dev->name);
+			panic_queues(dev);
+		}
+#endif
+		for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
+			/* pass FD to controller */
+#ifdef DEBUG
+			lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
+#else
+			lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
+#endif
+			lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
+			lp->rfd_cur++;
+		}
+		if (lp->rfd_cur > lp->rfd_limit)
+			lp->rfd_cur = lp->rfd_base;
+#ifdef DEBUG
+		if (lp->rfd_cur != next_rfd)
+			printk("rfd_cur = %p, next_rfd %p\n",
+			       lp->rfd_cur, next_rfd);
+#endif
+	}
+
+	return received;
+}
+
+static int tc35815_poll(struct napi_struct *napi, int budget)
+{
+	struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
+	struct net_device *dev = lp->dev;
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	int received = 0, handled;
+	u32 status;
+
+	spin_lock(&lp->rx_lock);
+	status = tc_readl(&tr->Int_Src);
+	do {
+		/* BLEx, FDAEx will be cleared later */
+		tc_writel(status & ~(Int_BLEx | Int_FDAEx),
+			  &tr->Int_Src);	/* write to clear */
+
+		handled = tc35815_do_interrupt(dev, status, budget - received);
+		if (status & (Int_BLEx | Int_FDAEx))
+			tc_writel(status & (Int_BLEx | Int_FDAEx),
+				  &tr->Int_Src);
+		if (handled >= 0) {
+			received += handled;
+			if (received >= budget)
+				break;
+		}
+		status = tc_readl(&tr->Int_Src);
+	} while (status);
+	spin_unlock(&lp->rx_lock);
+
+	if (received < budget) {
+		napi_complete(napi);
+		/* enable interrupts */
+		tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
+	}
+	return received;
+}
+
+#define TX_STA_ERR	(Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
+
+static void
+tc35815_check_tx_stat(struct net_device *dev, int status)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	const char *msg = NULL;
+
+	/* count collisions */
+	if (status & Tx_ExColl)
+		dev->stats.collisions += 16;
+	if (status & Tx_TxColl_MASK)
+		dev->stats.collisions += status & Tx_TxColl_MASK;
+
+	/* TX4939 does not have NCarr */
+	if (lp->chiptype == TC35815_TX4939)
+		status &= ~Tx_NCarr;
+	/* WORKAROUND: ignore LostCrS in full duplex operation */
+	if (!lp->link || lp->duplex == DUPLEX_FULL)
+		status &= ~Tx_NCarr;
+
+	if (!(status & TX_STA_ERR)) {
+		/* no error. */
+		dev->stats.tx_packets++;
+		return;
+	}
+
+	dev->stats.tx_errors++;
+	if (status & Tx_ExColl) {
+		dev->stats.tx_aborted_errors++;
+		msg = "Excessive Collision.";
+	}
+	if (status & Tx_Under) {
+		dev->stats.tx_fifo_errors++;
+		msg = "Tx FIFO Underrun.";
+		if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
+			lp->lstats.tx_underrun++;
+			if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
+				struct tc35815_regs __iomem *tr =
+					(struct tc35815_regs __iomem *)dev->base_addr;
+				tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
+				msg = "Tx FIFO Underrun.Change Tx threshold to max.";
+			}
+		}
+	}
+	if (status & Tx_Defer) {
+		dev->stats.tx_fifo_errors++;
+		msg = "Excessive Deferral.";
+	}
+	if (status & Tx_NCarr) {
+		dev->stats.tx_carrier_errors++;
+		msg = "Lost Carrier Sense.";
+	}
+	if (status & Tx_LateColl) {
+		dev->stats.tx_aborted_errors++;
+		msg = "Late Collision.";
+	}
+	if (status & Tx_TxPar) {
+		dev->stats.tx_fifo_errors++;
+		msg = "Transmit Parity Error.";
+	}
+	if (status & Tx_SQErr) {
+		dev->stats.tx_heartbeat_errors++;
+		msg = "Signal Quality Error.";
+	}
+	if (msg && netif_msg_tx_err(lp))
+		printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
+}
+
+/* This handles TX complete events posted by the device
+ * via interrupts.
+ */
+static void
+tc35815_txdone(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct TxFD *txfd;
+	unsigned int fdctl;
+
+	txfd = &lp->tfd_base[lp->tfd_end];
+	while (lp->tfd_start != lp->tfd_end &&
+	       !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
+		int status = le32_to_cpu(txfd->fd.FDStat);
+		struct sk_buff *skb;
+		unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
+		u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
+
+		if (netif_msg_tx_done(lp)) {
+			printk("%s: complete TxFD.\n", dev->name);
+			dump_txfd(txfd);
+		}
+		tc35815_check_tx_stat(dev, status);
+
+		skb = fdsystem != 0xffffffff ?
+			lp->tx_skbs[fdsystem].skb : NULL;
+#ifdef DEBUG
+		if (lp->tx_skbs[lp->tfd_end].skb != skb) {
+			printk("%s: tx_skbs mismatch.\n", dev->name);
+			panic_queues(dev);
+		}
+#else
+		BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
+#endif
+		if (skb) {
+			dev->stats.tx_bytes += skb->len;
+			pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
+			lp->tx_skbs[lp->tfd_end].skb = NULL;
+			lp->tx_skbs[lp->tfd_end].skb_dma = 0;
+			dev_kfree_skb_any(skb);
+		}
+		txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
+
+		lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
+		txfd = &lp->tfd_base[lp->tfd_end];
+#ifdef DEBUG
+		if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
+			printk("%s: TxFD FDNext invalid.\n", dev->name);
+			panic_queues(dev);
+		}
+#endif
+		if (fdnext & FD_Next_EOL) {
+			/* DMA Transmitter has been stopping... */
+			if (lp->tfd_end != lp->tfd_start) {
+				struct tc35815_regs __iomem *tr =
+					(struct tc35815_regs __iomem *)dev->base_addr;
+				int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
+				struct TxFD *txhead = &lp->tfd_base[head];
+				int qlen = (lp->tfd_start + TX_FD_NUM
+					    - lp->tfd_end) % TX_FD_NUM;
+
+#ifdef DEBUG
+				if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
+					printk("%s: TxFD FDCtl invalid.\n", dev->name);
+					panic_queues(dev);
+				}
+#endif
+				/* log max queue length */
+				if (lp->lstats.max_tx_qlen < qlen)
+					lp->lstats.max_tx_qlen = qlen;
+
+
+				/* start DMA Transmitter again */
+				txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
+				txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
+				if (netif_msg_tx_queued(lp)) {
+					printk("%s: start TxFD on queue.\n",
+					       dev->name);
+					dump_txfd(txfd);
+				}
+				tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
+			}
+			break;
+		}
+	}
+
+	/* If we had stopped the queue due to a "tx full"
+	 * condition, and space has now been made available,
+	 * wake up the queue.
+	 */
+	if (netif_queue_stopped(dev) && !tc35815_tx_full(dev))
+		netif_wake_queue(dev);
+}
+
+/* The inverse routine to tc35815_open(). */
+static int
+tc35815_close(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	netif_stop_queue(dev);
+	napi_disable(&lp->napi);
+	if (lp->phy_dev)
+		phy_stop(lp->phy_dev);
+	cancel_work_sync(&lp->restart_work);
+
+	/* Flush the Tx and disable Rx here. */
+	tc35815_chip_reset(dev);
+	free_irq(dev->irq, dev);
+
+	tc35815_free_queues(dev);
+
+	return 0;
+
+}
+
+/*
+ * Get the current statistics.
+ * This may be called with the card open or closed.
+ */
+static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
+{
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	if (netif_running(dev))
+		/* Update the statistics from the device registers. */
+		dev->stats.rx_missed_errors += tc_readl(&tr->Miss_Cnt);
+
+	return &dev->stats;
+}
+
+static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	int cam_index = index * 6;
+	u32 cam_data;
+	u32 saved_addr;
+
+	saved_addr = tc_readl(&tr->CAM_Adr);
+
+	if (netif_msg_hw(lp))
+		printk(KERN_DEBUG "%s: CAM %d: %pM\n",
+			dev->name, index, addr);
+	if (index & 1) {
+		/* read modify write */
+		tc_writel(cam_index - 2, &tr->CAM_Adr);
+		cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
+		cam_data |= addr[0] << 8 | addr[1];
+		tc_writel(cam_data, &tr->CAM_Data);
+		/* write whole word */
+		tc_writel(cam_index + 2, &tr->CAM_Adr);
+		cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
+		tc_writel(cam_data, &tr->CAM_Data);
+	} else {
+		/* write whole word */
+		tc_writel(cam_index, &tr->CAM_Adr);
+		cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
+		tc_writel(cam_data, &tr->CAM_Data);
+		/* read modify write */
+		tc_writel(cam_index + 4, &tr->CAM_Adr);
+		cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
+		cam_data |= addr[4] << 24 | (addr[5] << 16);
+		tc_writel(cam_data, &tr->CAM_Data);
+	}
+
+	tc_writel(saved_addr, &tr->CAM_Adr);
+}
+
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ * num_addrs == -1	Promiscuous mode, receive all packets
+ * num_addrs == 0	Normal mode, clear multicast list
+ * num_addrs > 0	Multicast mode, receive normal and MC packets,
+ *			and do best-effort filtering.
+ */
+static void
+tc35815_set_multicast_list(struct net_device *dev)
+{
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+
+	if (dev->flags & IFF_PROMISC) {
+		/* With some (all?) 100MHalf HUB, controller will hang
+		 * if we enabled promiscuous mode before linkup... */
+		struct tc35815_local *lp = netdev_priv(dev);
+
+		if (!lp->link)
+			return;
+		/* Enable promiscuous mode */
+		tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
+	} else if ((dev->flags & IFF_ALLMULTI) ||
+		  netdev_mc_count(dev) > CAM_ENTRY_MAX - 3) {
+		/* CAM 0, 1, 20 are reserved. */
+		/* Disable promiscuous mode, use normal mode. */
+		tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
+	} else if (!netdev_mc_empty(dev)) {
+		struct netdev_hw_addr *ha;
+		int i;
+		int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
+
+		tc_writel(0, &tr->CAM_Ctl);
+		/* Walk the address list, and load the filter */
+		i = 0;
+		netdev_for_each_mc_addr(ha, dev) {
+			/* entry 0,1 is reserved. */
+			tc35815_set_cam_entry(dev, i + 2, ha->addr);
+			ena_bits |= CAM_Ena_Bit(i + 2);
+			i++;
+		}
+		tc_writel(ena_bits, &tr->CAM_Ena);
+		tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
+	} else {
+		tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
+		tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
+	}
+}
+
+static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	strcpy(info->driver, MODNAME);
+	strcpy(info->version, DRV_VERSION);
+	strcpy(info->bus_info, pci_name(lp->pci_dev));
+}
+
+static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	if (!lp->phy_dev)
+		return -ENODEV;
+	return phy_ethtool_gset(lp->phy_dev, cmd);
+}
+
+static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	if (!lp->phy_dev)
+		return -ENODEV;
+	return phy_ethtool_sset(lp->phy_dev, cmd);
+}
+
+static u32 tc35815_get_msglevel(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	return lp->msg_enable;
+}
+
+static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	lp->msg_enable = datum;
+}
+
+static int tc35815_get_sset_count(struct net_device *dev, int sset)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	switch (sset) {
+	case ETH_SS_STATS:
+		return sizeof(lp->lstats) / sizeof(int);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	data[0] = lp->lstats.max_tx_qlen;
+	data[1] = lp->lstats.tx_ints;
+	data[2] = lp->lstats.rx_ints;
+	data[3] = lp->lstats.tx_underrun;
+}
+
+static struct {
+	const char str[ETH_GSTRING_LEN];
+} ethtool_stats_keys[] = {
+	{ "max_tx_qlen" },
+	{ "tx_ints" },
+	{ "rx_ints" },
+	{ "tx_underrun" },
+};
+
+static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+	memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
+}
+
+static const struct ethtool_ops tc35815_ethtool_ops = {
+	.get_drvinfo		= tc35815_get_drvinfo,
+	.get_settings		= tc35815_get_settings,
+	.set_settings		= tc35815_set_settings,
+	.get_link		= ethtool_op_get_link,
+	.get_msglevel		= tc35815_get_msglevel,
+	.set_msglevel		= tc35815_set_msglevel,
+	.get_strings		= tc35815_get_strings,
+	.get_sset_count		= tc35815_get_sset_count,
+	.get_ethtool_stats	= tc35815_get_ethtool_stats,
+};
+
+static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	if (!netif_running(dev))
+		return -EINVAL;
+	if (!lp->phy_dev)
+		return -ENODEV;
+	return phy_mii_ioctl(lp->phy_dev, rq, cmd);
+}
+
+static void tc35815_chip_reset(struct net_device *dev)
+{
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	int i;
+	/* reset the controller */
+	tc_writel(MAC_Reset, &tr->MAC_Ctl);
+	udelay(4); /* 3200ns */
+	i = 0;
+	while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
+		if (i++ > 100) {
+			printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
+			break;
+		}
+		mdelay(1);
+	}
+	tc_writel(0, &tr->MAC_Ctl);
+
+	/* initialize registers to default value */
+	tc_writel(0, &tr->DMA_Ctl);
+	tc_writel(0, &tr->TxThrsh);
+	tc_writel(0, &tr->TxPollCtr);
+	tc_writel(0, &tr->RxFragSize);
+	tc_writel(0, &tr->Int_En);
+	tc_writel(0, &tr->FDA_Bas);
+	tc_writel(0, &tr->FDA_Lim);
+	tc_writel(0xffffffff, &tr->Int_Src);	/* Write 1 to clear */
+	tc_writel(0, &tr->CAM_Ctl);
+	tc_writel(0, &tr->Tx_Ctl);
+	tc_writel(0, &tr->Rx_Ctl);
+	tc_writel(0, &tr->CAM_Ena);
+	(void)tc_readl(&tr->Miss_Cnt);	/* Read to clear */
+
+	/* initialize internal SRAM */
+	tc_writel(DMA_TestMode, &tr->DMA_Ctl);
+	for (i = 0; i < 0x1000; i += 4) {
+		tc_writel(i, &tr->CAM_Adr);
+		tc_writel(0, &tr->CAM_Data);
+	}
+	tc_writel(0, &tr->DMA_Ctl);
+}
+
+static void tc35815_chip_init(struct net_device *dev)
+{
+	struct tc35815_local *lp = netdev_priv(dev);
+	struct tc35815_regs __iomem *tr =
+		(struct tc35815_regs __iomem *)dev->base_addr;
+	unsigned long txctl = TX_CTL_CMD;
+
+	/* load station address to CAM */
+	tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
+
+	/* Enable CAM (broadcast and unicast) */
+	tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
+	tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
+
+	/* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
+	if (HAVE_DMA_RXALIGN(lp))
+		tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
+	else
+		tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
+	tc_writel(0, &tr->TxPollCtr);	/* Batch mode */
+	tc_writel(TX_THRESHOLD, &tr->TxThrsh);
+	tc_writel(INT_EN_CMD, &tr->Int_En);
+
+	/* set queues */
+	tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
+	tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
+		  &tr->FDA_Lim);
+	/*
+	 * Activation method:
+	 * First, enable the MAC Transmitter and the DMA Receive circuits.
+	 * Then enable the DMA Transmitter and the MAC Receive circuits.
+	 */
+	tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);	/* start DMA receiver */
+	tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);	/* start MAC receiver */
+
+	/* start MAC transmitter */
+	/* TX4939 does not have EnLCarr */
+	if (lp->chiptype == TC35815_TX4939)
+		txctl &= ~Tx_EnLCarr;
+	/* WORKAROUND: ignore LostCrS in full duplex operation */
+	if (!lp->phy_dev || !lp->link || lp->duplex == DUPLEX_FULL)
+		txctl &= ~Tx_EnLCarr;
+	tc_writel(txctl, &tr->Tx_Ctl);
+}
+
+#ifdef CONFIG_PM
+static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct tc35815_local *lp = netdev_priv(dev);
+	unsigned long flags;
+
+	pci_save_state(pdev);
+	if (!netif_running(dev))
+		return 0;
+	netif_device_detach(dev);
+	if (lp->phy_dev)
+		phy_stop(lp->phy_dev);
+	spin_lock_irqsave(&lp->lock, flags);
+	tc35815_chip_reset(dev);
+	spin_unlock_irqrestore(&lp->lock, flags);
+	pci_set_power_state(pdev, PCI_D3hot);
+	return 0;
+}
+
+static int tc35815_resume(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct tc35815_local *lp = netdev_priv(dev);
+
+	pci_restore_state(pdev);
+	if (!netif_running(dev))
+		return 0;
+	pci_set_power_state(pdev, PCI_D0);
+	tc35815_restart(dev);
+	netif_carrier_off(dev);
+	if (lp->phy_dev)
+		phy_start(lp->phy_dev);
+	netif_device_attach(dev);
+	return 0;
+}
+#endif /* CONFIG_PM */
+
+static struct pci_driver tc35815_pci_driver = {
+	.name		= MODNAME,
+	.id_table	= tc35815_pci_tbl,
+	.probe		= tc35815_init_one,
+	.remove		= __devexit_p(tc35815_remove_one),
+#ifdef CONFIG_PM
+	.suspend	= tc35815_suspend,
+	.resume		= tc35815_resume,
+#endif
+};
+
+module_param_named(speed, options.speed, int, 0);
+MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
+module_param_named(duplex, options.duplex, int, 0);
+MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
+
+static int __init tc35815_init_module(void)
+{
+	return pci_register_driver(&tc35815_pci_driver);
+}
+
+static void __exit tc35815_cleanup_module(void)
+{
+	pci_unregister_driver(&tc35815_pci_driver);
+}
+
+module_init(tc35815_init_module);
+module_exit(tc35815_cleanup_module);
+
+MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
+MODULE_LICENSE("GPL");
-- 
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