/*
    A Davicom DM9102/DM9102A/DM9102A+DM9801/DM9102A+DM9802 NIC fast
    ethernet driver for Linux.
    Copyright (C) 1997  Sten Wang

    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.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    DAVICOM Web-Site: www.davicom.com.tw

    Author: Sten Wang, 886-3-5798797-8517, E-mail: sten_wang@davicom.com.tw
    Maintainer: Tobias Ringstrom <tori@unhappy.mine.nu>

    (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.

    Marcelo Tosatti <marcelo@conectiva.com.br> :
    Made it compile in 2.3 (device to net_device)

    Alan Cox <alan@redhat.com> :
    Cleaned up for kernel merge.
    Removed the back compatibility support
    Reformatted, fixing spelling etc as I went
    Removed IRQ 0-15 assumption

    Jeff Garzik <jgarzik@pobox.com> :
    Updated to use new PCI driver API.
    Resource usage cleanups.
    Report driver version to user.

    Tobias Ringstrom <tori@unhappy.mine.nu> :
    Cleaned up and added SMP safety.  Thanks go to Jeff Garzik,
    Andrew Morton and Frank Davis for the SMP safety fixes.

    Vojtech Pavlik <vojtech@suse.cz> :
    Cleaned up pointer arithmetics.
    Fixed a lot of 64bit issues.
    Cleaned up printk()s a bit.
    Fixed some obvious big endian problems.

    Tobias Ringstrom <tori@unhappy.mine.nu> :
    Use time_after for jiffies calculation.  Added ethtool
    support.  Updated PCI resource allocation.  Do not
    forget to unmap PCI mapped skbs.

    Alan Cox <alan@redhat.com>
    Added new PCI identifiers provided by Clear Zhang at ALi
    for their 1563 ethernet device.

    TODO

    Implement pci_driver::suspend() and pci_driver::resume()
    power management methods.

    Check on 64 bit boxes.
    Check and fix on big endian boxes.

    Test and make sure PCI latency is now correct for all cases.
*/

#define DRV_NAME	"dmfe"
#define DRV_VERSION	"1.36.4"
#define DRV_RELDATE	"2002-01-17"

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/crc32.h>
#include <linux/bitops.h>

#include <asm/processor.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
#include <asm/irq.h>


/* Board/System/Debug information/definition ---------------- */
#define PCI_DM9132_ID   0x91321282      /* Davicom DM9132 ID */
#define PCI_DM9102_ID   0x91021282      /* Davicom DM9102 ID */
#define PCI_DM9100_ID   0x91001282      /* Davicom DM9100 ID */
#define PCI_DM9009_ID   0x90091282      /* Davicom DM9009 ID */

#define DM9102_IO_SIZE  0x80
#define DM9102A_IO_SIZE 0x100
#define TX_MAX_SEND_CNT 0x1             /* Maximum tx packet per time */
#define TX_DESC_CNT     0x10            /* Allocated Tx descriptors */
#define RX_DESC_CNT     0x20            /* Allocated Rx descriptors */
#define TX_FREE_DESC_CNT (TX_DESC_CNT - 2)	/* Max TX packet count */
#define TX_WAKE_DESC_CNT (TX_DESC_CNT - 3)	/* TX wakeup count */
#define DESC_ALL_CNT    (TX_DESC_CNT + RX_DESC_CNT)
#define TX_BUF_ALLOC    0x600
#define RX_ALLOC_SIZE   0x620
#define DM910X_RESET    1
#define CR0_DEFAULT     0x00E00000      /* TX & RX burst mode */
#define CR6_DEFAULT     0x00080000      /* HD */
#define CR7_DEFAULT     0x180c1
#define CR15_DEFAULT    0x06            /* TxJabber RxWatchdog */
#define TDES0_ERR_MASK  0x4302          /* TXJT, LC, EC, FUE */
#define MAX_PACKET_SIZE 1514
#define DMFE_MAX_MULTICAST 14
#define RX_COPY_SIZE	100
#define MAX_CHECK_PACKET 0x8000
#define DM9801_NOISE_FLOOR 8
#define DM9802_NOISE_FLOOR 5

#define DMFE_10MHF      0
#define DMFE_100MHF     1
#define DMFE_10MFD      4
#define DMFE_100MFD     5
#define DMFE_AUTO       8
#define DMFE_1M_HPNA    0x10

#define DMFE_TXTH_72	0x400000	/* TX TH 72 byte */
#define DMFE_TXTH_96	0x404000	/* TX TH 96 byte */
#define DMFE_TXTH_128	0x0000		/* TX TH 128 byte */
#define DMFE_TXTH_256	0x4000		/* TX TH 256 byte */
#define DMFE_TXTH_512	0x8000		/* TX TH 512 byte */
#define DMFE_TXTH_1K	0xC000		/* TX TH 1K  byte */

#define DMFE_TIMER_WUT  (jiffies + HZ * 1)/* timer wakeup time : 1 second */
#define DMFE_TX_TIMEOUT ((3*HZ)/2)	/* tx packet time-out time 1.5 s" */
#define DMFE_TX_KICK 	(HZ/2)	/* tx packet Kick-out time 0.5 s" */

#define DMFE_DBUG(dbug_now, msg, value) \
	do { \
 		if (dmfe_debug || (dbug_now)) \
			printk(KERN_ERR DRV_NAME ": %s %lx\n",\
 				(msg), (long) (value)); \
	} while (0)

#define SHOW_MEDIA_TYPE(mode) \
	printk (KERN_INFO DRV_NAME ": Change Speed to %sMhz %s duplex\n" , \
		(mode & 1) ? "100":"10", (mode & 4) ? "full":"half");


/* CR9 definition: SROM/MII */
#define CR9_SROM_READ   0x4800
#define CR9_SRCS        0x1
#define CR9_SRCLK       0x2
#define CR9_CRDOUT      0x8
#define SROM_DATA_0     0x0
#define SROM_DATA_1     0x4
#define PHY_DATA_1      0x20000
#define PHY_DATA_0      0x00000
#define MDCLKH          0x10000

#define PHY_POWER_DOWN	0x800

#define SROM_V41_CODE   0x14

#define SROM_CLK_WRITE(data, ioaddr) \
	outl(data|CR9_SROM_READ|CR9_SRCS,ioaddr); \
	udelay(5); \
	outl(data|CR9_SROM_READ|CR9_SRCS|CR9_SRCLK,ioaddr); \
	udelay(5); \
	outl(data|CR9_SROM_READ|CR9_SRCS,ioaddr); \
	udelay(5);

#define __CHK_IO_SIZE(pci_id, dev_rev) \
 (( ((pci_id)==PCI_DM9132_ID) || ((dev_rev) >= 0x02000030) ) ? \
	DM9102A_IO_SIZE: DM9102_IO_SIZE)

#define CHK_IO_SIZE(pci_dev, dev_rev) \
	(__CHK_IO_SIZE(((pci_dev)->device << 16) | (pci_dev)->vendor, dev_rev))

/* Sten Check */
#define DEVICE net_device

/* Structure/enum declaration ------------------------------- */
struct tx_desc {
        __le32 tdes0, tdes1, tdes2, tdes3; /* Data for the card */
        char *tx_buf_ptr;               /* Data for us */
        struct tx_desc *next_tx_desc;
} __attribute__(( aligned(32) ));

struct rx_desc {
	__le32 rdes0, rdes1, rdes2, rdes3; /* Data for the card */
	struct sk_buff *rx_skb_ptr;	/* Data for us */
	struct rx_desc *next_rx_desc;
} __attribute__(( aligned(32) ));

struct dmfe_board_info {
	u32 chip_id;			/* Chip vendor/Device ID */
	u32 chip_revision;		/* Chip revision */
	struct DEVICE *next_dev;	/* next device */
	struct pci_dev *pdev;		/* PCI device */
	spinlock_t lock;

	long ioaddr;			/* I/O base address */
	u32 cr0_data;
	u32 cr5_data;
	u32 cr6_data;
	u32 cr7_data;
	u32 cr15_data;

	/* pointer for memory physical address */
	dma_addr_t buf_pool_dma_ptr;	/* Tx buffer pool memory */
	dma_addr_t buf_pool_dma_start;	/* Tx buffer pool align dword */
	dma_addr_t desc_pool_dma_ptr;	/* descriptor pool memory */
	dma_addr_t first_tx_desc_dma;
	dma_addr_t first_rx_desc_dma;

	/* descriptor pointer */
	unsigned char *buf_pool_ptr;	/* Tx buffer pool memory */
	unsigned char *buf_pool_start;	/* Tx buffer pool align dword */
	unsigned char *desc_pool_ptr;	/* descriptor pool memory */
	struct tx_desc *first_tx_desc;
	struct tx_desc *tx_insert_ptr;
	struct tx_desc *tx_remove_ptr;
	struct rx_desc *first_rx_desc;
	struct rx_desc *rx_insert_ptr;
	struct rx_desc *rx_ready_ptr;	/* packet come pointer */
	unsigned long tx_packet_cnt;	/* transmitted packet count */
	unsigned long tx_queue_cnt;	/* wait to send packet count */
	unsigned long rx_avail_cnt;	/* available rx descriptor count */
	unsigned long interval_rx_cnt;	/* rx packet count a callback time */

	u16 HPNA_command;		/* For HPNA register 16 */
	u16 HPNA_timer;			/* For HPNA remote device check */
	u16 dbug_cnt;
	u16 NIC_capability;		/* NIC media capability */
	u16 PHY_reg4;			/* Saved Phyxcer register 4 value */

	u8 HPNA_present;		/* 0:none, 1:DM9801, 2:DM9802 */
	u8 chip_type;			/* Keep DM9102A chip type */
	u8 media_mode;			/* user specify media mode */
	u8 op_mode;			/* real work media mode */
	u8 phy_addr;
	u8 wait_reset;			/* Hardware failed, need to reset */
	u8 dm910x_chk_mode;		/* Operating mode check */
	u8 first_in_callback;		/* Flag to record state */
	struct timer_list timer;

	/* System defined statistic counter */
	struct net_device_stats stats;

	/* Driver defined statistic counter */
	unsigned long tx_fifo_underrun;
	unsigned long tx_loss_carrier;
	unsigned long tx_no_carrier;
	unsigned long tx_late_collision;
	unsigned long tx_excessive_collision;
	unsigned long tx_jabber_timeout;
	unsigned long reset_count;
	unsigned long reset_cr8;
	unsigned long reset_fatal;
	unsigned long reset_TXtimeout;

	/* NIC SROM data */
	unsigned char srom[128];
};

enum dmfe_offsets {
	DCR0 = 0x00, DCR1 = 0x08, DCR2 = 0x10, DCR3 = 0x18, DCR4 = 0x20,
	DCR5 = 0x28, DCR6 = 0x30, DCR7 = 0x38, DCR8 = 0x40, DCR9 = 0x48,
	DCR10 = 0x50, DCR11 = 0x58, DCR12 = 0x60, DCR13 = 0x68, DCR14 = 0x70,
	DCR15 = 0x78
};

enum dmfe_CR6_bits {
	CR6_RXSC = 0x2, CR6_PBF = 0x8, CR6_PM = 0x40, CR6_PAM = 0x80,
	CR6_FDM = 0x200, CR6_TXSC = 0x2000, CR6_STI = 0x100000,
	CR6_SFT = 0x200000, CR6_RXA = 0x40000000, CR6_NO_PURGE = 0x20000000
};

/* Global variable declaration ----------------------------- */
static int __devinitdata printed_version;
static char version[] __devinitdata =
	KERN_INFO DRV_NAME ": Davicom DM9xxx net driver, version "
	DRV_VERSION " (" DRV_RELDATE ")\n";

static int dmfe_debug;
static unsigned char dmfe_media_mode = DMFE_AUTO;
static u32 dmfe_cr6_user_set;

/* For module input parameter */
static int debug;
static u32 cr6set;
static unsigned char mode = 8;
static u8 chkmode = 1;
static u8 HPNA_mode;		/* Default: Low Power/High Speed */
static u8 HPNA_rx_cmd;		/* Default: Disable Rx remote command */
static u8 HPNA_tx_cmd;		/* Default: Don't issue remote command */
static u8 HPNA_NoiseFloor;	/* Default: HPNA NoiseFloor */
static u8 SF_mode;		/* Special Function: 1:VLAN, 2:RX Flow Control
				   4: TX pause packet */


/* function declaration ------------------------------------- */
static int dmfe_open(struct DEVICE *);
static int dmfe_start_xmit(struct sk_buff *, struct DEVICE *);
static int dmfe_stop(struct DEVICE *);
static struct net_device_stats * dmfe_get_stats(struct DEVICE *);
static void dmfe_set_filter_mode(struct DEVICE *);
static const struct ethtool_ops netdev_ethtool_ops;
static u16 read_srom_word(long ,int);
static irqreturn_t dmfe_interrupt(int , void *);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void poll_dmfe (struct net_device *dev);
#endif
static void dmfe_descriptor_init(struct dmfe_board_info *, unsigned long);
static void allocate_rx_buffer(struct dmfe_board_info *);
static void update_cr6(u32, unsigned long);
static void send_filter_frame(struct DEVICE * ,int);
static void dm9132_id_table(struct DEVICE * ,int);
static u16 phy_read(unsigned long, u8, u8, u32);
static void phy_write(unsigned long, u8, u8, u16, u32);
static void phy_write_1bit(unsigned long, u32);
static u16 phy_read_1bit(unsigned long);
static u8 dmfe_sense_speed(struct dmfe_board_info *);
static void dmfe_process_mode(struct dmfe_board_info *);
static void dmfe_timer(unsigned long);
static inline u32 cal_CRC(unsigned char *, unsigned int, u8);
static void dmfe_rx_packet(struct DEVICE *, struct dmfe_board_info *);
static void dmfe_free_tx_pkt(struct DEVICE *, struct dmfe_board_info *);
static void dmfe_reuse_skb(struct dmfe_board_info *, struct sk_buff *);
static void dmfe_dynamic_reset(struct DEVICE *);
static void dmfe_free_rxbuffer(struct dmfe_board_info *);
static void dmfe_init_dm910x(struct DEVICE *);
static void dmfe_parse_srom(struct dmfe_board_info *);
static void dmfe_program_DM9801(struct dmfe_board_info *, int);
static void dmfe_program_DM9802(struct dmfe_board_info *);
static void dmfe_HPNA_remote_cmd_chk(struct dmfe_board_info * );
static void dmfe_set_phyxcer(struct dmfe_board_info *);

/* DM910X network board routine ---------------------------- */

/*
 *	Search DM910X board ,allocate space and register it
 */

static int __devinit dmfe_init_one (struct pci_dev *pdev,
				    const struct pci_device_id *ent)
{
	struct dmfe_board_info *db;	/* board information structure */
	struct net_device *dev;
	u32 dev_rev, pci_pmr;
	int i, err;

	DMFE_DBUG(0, "dmfe_init_one()", 0);

	if (!printed_version++)
		printk(version);

	/* Init network device */
	dev = alloc_etherdev(sizeof(*db));
	if (dev == NULL)
		return -ENOMEM;
	SET_MODULE_OWNER(dev);
	SET_NETDEV_DEV(dev, &pdev->dev);

	if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
		printk(KERN_WARNING DRV_NAME
			": 32-bit PCI DMA not available.\n");
		err = -ENODEV;
		goto err_out_free;
	}

	/* Enable Master/IO access, Disable memory access */
	err = pci_enable_device(pdev);
	if (err)
		goto err_out_free;

	if (!pci_resource_start(pdev, 0)) {
		printk(KERN_ERR DRV_NAME ": I/O base is zero\n");
		err = -ENODEV;
		goto err_out_disable;
	}

	/* Read Chip revision */
	pci_read_config_dword(pdev, PCI_REVISION_ID, &dev_rev);

	if (pci_resource_len(pdev, 0) < (CHK_IO_SIZE(pdev, dev_rev)) ) {
		printk(KERN_ERR DRV_NAME ": Allocated I/O size too small\n");
		err = -ENODEV;
		goto err_out_disable;
	}

#if 0	/* pci_{enable_device,set_master} sets minimum latency for us now */

	/* Set Latency Timer 80h */
	/* FIXME: setting values > 32 breaks some SiS 559x stuff.
	   Need a PCI quirk.. */

	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80);
#endif

	if (pci_request_regions(pdev, DRV_NAME)) {
		printk(KERN_ERR DRV_NAME ": Failed to request PCI regions\n");
		err = -ENODEV;
		goto err_out_disable;
	}

	/* Init system & device */
	db = netdev_priv(dev);

	/* Allocate Tx/Rx descriptor memory */
	db->desc_pool_ptr = pci_alloc_consistent(pdev, sizeof(struct tx_desc) *
			DESC_ALL_CNT + 0x20, &db->desc_pool_dma_ptr);

	db->buf_pool_ptr = pci_alloc_consistent(pdev, TX_BUF_ALLOC *
			TX_DESC_CNT + 4, &db->buf_pool_dma_ptr);

	db->first_tx_desc = (struct tx_desc *) db->desc_pool_ptr;
	db->first_tx_desc_dma = db->desc_pool_dma_ptr;
	db->buf_pool_start = db->buf_pool_ptr;
	db->buf_pool_dma_start = db->buf_pool_dma_ptr;

	db->chip_id = ent->driver_data;
	db->ioaddr = pci_resource_start(pdev, 0);
	db->chip_revision = dev_rev;

	db->pdev = pdev;

	dev->base_addr = db->ioaddr;
	dev->irq = pdev->irq;
	pci_set_drvdata(pdev, dev);
	dev->open = &dmfe_open;
	dev->hard_start_xmit = &dmfe_start_xmit;
	dev->stop = &dmfe_stop;
	dev->get_stats = &dmfe_get_stats;
	dev->set_multicast_list = &dmfe_set_filter_mode;
#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = &poll_dmfe;
#endif
	dev->ethtool_ops = &netdev_ethtool_ops;
	netif_carrier_off(dev);
	spin_lock_init(&db->lock);

	pci_read_config_dword(pdev, 0x50, &pci_pmr);
	pci_pmr &= 0x70000;
	if ( (pci_pmr == 0x10000) && (dev_rev == 0x02000031) )
		db->chip_type = 1;	/* DM9102A E3 */
	else
		db->chip_type = 0;

	/* read 64 word srom data */
	for (i = 0; i < 64; i++)
		((__le16 *) db->srom)[i] =
			cpu_to_le16(read_srom_word(db->ioaddr, i));

	/* Set Node address */
	for (i = 0; i < 6; i++)
		dev->dev_addr[i] = db->srom[20 + i];

	err = register_netdev (dev);
	if (err)
		goto err_out_res;

	printk(KERN_INFO "%s: Davicom DM%04lx at pci%s,",
		dev->name,
		ent->driver_data >> 16,
		pci_name(pdev));
	for (i = 0; i < 6; i++)
		printk("%c%02x", i ? ':' : ' ', dev->dev_addr[i]);
	printk(", irq %d.\n", dev->irq);

	pci_set_master(pdev);

	return 0;

err_out_res:
	pci_release_regions(pdev);
err_out_disable:
	pci_disable_device(pdev);
err_out_free:
	pci_set_drvdata(pdev, NULL);
	free_netdev(dev);

	return err;
}


static void __devexit dmfe_remove_one (struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct dmfe_board_info *db = netdev_priv(dev);

	DMFE_DBUG(0, "dmfe_remove_one()", 0);

 	if (dev) {

		unregister_netdev(dev);

		pci_free_consistent(db->pdev, sizeof(struct tx_desc) *
					DESC_ALL_CNT + 0x20, db->desc_pool_ptr,
 					db->desc_pool_dma_ptr);
		pci_free_consistent(db->pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
					db->buf_pool_ptr, db->buf_pool_dma_ptr);
		pci_release_regions(pdev);
		free_netdev(dev);	/* free board information */

		pci_set_drvdata(pdev, NULL);
	}

	DMFE_DBUG(0, "dmfe_remove_one() exit", 0);
}


/*
 *	Open the interface.
 *	The interface is opened whenever "ifconfig" actives it.
 */

static int dmfe_open(struct DEVICE *dev)
{
	int ret;
	struct dmfe_board_info *db = netdev_priv(dev);

	DMFE_DBUG(0, "dmfe_open", 0);

	ret = request_irq(dev->irq, &dmfe_interrupt,
			  IRQF_SHARED, dev->name, dev);
	if (ret)
		return ret;

	/* system variable init */
	db->cr6_data = CR6_DEFAULT | dmfe_cr6_user_set;
	db->tx_packet_cnt = 0;
	db->tx_queue_cnt = 0;
	db->rx_avail_cnt = 0;
	db->wait_reset = 0;

	db->first_in_callback = 0;
	db->NIC_capability = 0xf;	/* All capability*/
	db->PHY_reg4 = 0x1e0;

	/* CR6 operation mode decision */
	if ( !chkmode || (db->chip_id == PCI_DM9132_ID) ||
		(db->chip_revision >= 0x02000030) ) {
    		db->cr6_data |= DMFE_TXTH_256;
		db->cr0_data = CR0_DEFAULT;
		db->dm910x_chk_mode=4;		/* Enter the normal mode */
 	} else {
		db->cr6_data |= CR6_SFT;	/* Store & Forward mode */
		db->cr0_data = 0;
		db->dm910x_chk_mode = 1;	/* Enter the check mode */
	}

	/* Initilize DM910X board */
	dmfe_init_dm910x(dev);

	/* Active System Interface */
	netif_wake_queue(dev);

	/* set and active a timer process */
	init_timer(&db->timer);
	db->timer.expires = DMFE_TIMER_WUT + HZ * 2;
	db->timer.data = (unsigned long)dev;
	db->timer.function = &dmfe_timer;
	add_timer(&db->timer);

	return 0;
}


/*	Initilize DM910X board
 *	Reset DM910X board
 *	Initilize TX/Rx descriptor chain structure
 *	Send the set-up frame
 *	Enable Tx/Rx machine
 */

static void dmfe_init_dm910x(struct DEVICE *dev)
{
	struct dmfe_board_info *db = netdev_priv(dev);
	unsigned long ioaddr = db->ioaddr;

	DMFE_DBUG(0, "dmfe_init_dm910x()", 0);

	/* Reset DM910x MAC controller */
	outl(DM910X_RESET, ioaddr + DCR0);	/* RESET MAC */
	udelay(100);
	outl(db->cr0_data, ioaddr + DCR0);
	udelay(5);

	/* Phy addr : DM910(A)2/DM9132/9801, phy address = 1 */
	db->phy_addr = 1;

	/* Parser SROM and media mode */
	dmfe_parse_srom(db);
	db->media_mode = dmfe_media_mode;

	/* RESET Phyxcer Chip by GPR port bit 7 */
	outl(0x180, ioaddr + DCR12);		/* Let bit 7 output port */
	if (db->chip_id == PCI_DM9009_ID) {
		outl(0x80, ioaddr + DCR12);	/* Issue RESET signal */
		mdelay(300);			/* Delay 300 ms */
	}
	outl(0x0, ioaddr + DCR12);	/* Clear RESET signal */

	/* Process Phyxcer Media Mode */
	if ( !(db->media_mode & 0x10) )	/* Force 1M mode */
		dmfe_set_phyxcer(db);

	/* Media Mode Process */
	if ( !(db->media_mode & DMFE_AUTO) )
		db->op_mode = db->media_mode; 	/* Force Mode */

	/* Initiliaze Transmit/Receive decriptor and CR3/4 */
	dmfe_descriptor_init(db, ioaddr);

	/* Init CR6 to program DM910x operation */
	update_cr6(db->cr6_data, ioaddr);

	/* Send setup frame */
	if (db->chip_id == PCI_DM9132_ID)
		dm9132_id_table(dev, dev->mc_count);	/* DM9132 */
	else
		send_filter_frame(dev, dev->mc_count);	/* DM9102/DM9102A */

	/* Init CR7, interrupt active bit */
	db->cr7_data = CR7_DEFAULT;
	outl(db->cr7_data, ioaddr + DCR7);

	/* Init CR15, Tx jabber and Rx watchdog timer */
	outl(db->cr15_data, ioaddr + DCR15);

	/* Enable DM910X Tx/Rx function */
	db->cr6_data |= CR6_RXSC | CR6_TXSC | 0x40000;
	update_cr6(db->cr6_data, ioaddr);
}


/*
 *	Hardware start transmission.
 *	Send a packet to media from the upper layer.
 */

static int dmfe_start_xmit(struct sk_buff *skb, struct DEVICE *dev)
{
	struct dmfe_board_info *db = netdev_priv(dev);
	struct tx_desc *txptr;
	unsigned long flags;

	DMFE_DBUG(0, "dmfe_start_xmit", 0);

	/* Resource flag check */
	netif_stop_queue(dev);

	/* Too large packet check */
	if (skb->len > MAX_PACKET_SIZE) {
		printk(KERN_ERR DRV_NAME ": big packet = %d\n", (u16)skb->len);
		dev_kfree_skb(skb);
		return 0;
	}

	spin_lock_irqsave(&db->lock, flags);

	/* No Tx resource check, it never happen nromally */
	if (db->tx_queue_cnt >= TX_FREE_DESC_CNT) {
		spin_unlock_irqrestore(&db->lock, flags);
		printk(KERN_ERR DRV_NAME ": No Tx resource %ld\n",
		       db->tx_queue_cnt);
		return 1;
	}

	/* Disable NIC interrupt */
	outl(0, dev->base_addr + DCR7);

	/* transmit this packet */
	txptr = db->tx_insert_ptr;
	memcpy(txptr->tx_buf_ptr, skb->data, skb->len);
	txptr->tdes1 = cpu_to_le32(0xe1000000 | skb->len);

	/* Point to next transmit free descriptor */
	db->tx_insert_ptr = txptr->next_tx_desc;

	/* Transmit Packet Process */
	if ( (!db->tx_queue_cnt) && (db->tx_packet_cnt < TX_MAX_SEND_CNT) ) {
		txptr->tdes0 = cpu_to_le32(0x80000000);	/* Set owner bit */
		db->tx_packet_cnt++;			/* Ready to send */
		outl(0x1, dev->base_addr + DCR1);	/* Issue Tx polling */
		dev->trans_start = jiffies;		/* saved time stamp */
	} else {
		db->tx_queue_cnt++;			/* queue TX packet */
		outl(0x1, dev->base_addr + DCR1);	/* Issue Tx polling */
	}

	/* Tx resource check */
	if ( db->tx_queue_cnt < TX_FREE_DESC_CNT )
		netif_wake_queue(dev);

	/* Restore CR7 to enable interrupt */
	spin_unlock_irqrestore(&db->lock, flags);
	outl(db->cr7_data, dev->base_addr + DCR7);

	/* free this SKB */
	dev_kfree_skb(skb);

	return 0;
}


/*
 *	Stop the interface.
 *	The interface is stopped when it is brought.
 */

static int dmfe_stop(struct DEVICE *dev)
{
	struct dmfe_board_info *db = netdev_priv(dev);
	unsigned long ioaddr = dev->base_addr;

	DMFE_DBUG(0, "dmfe_stop", 0);

	/* disable system */
	netif_stop_queue(dev);

	/* deleted timer */
	del_timer_sync(&db->timer);

	/* Reset & stop DM910X board */
	outl(DM910X_RESET, ioaddr + DCR0);
	udelay(5);
	phy_write(db->ioaddr, db->phy_addr, 0, 0x8000, db->chip_id);

	/* free interrupt */
	free_irq(dev->irq, dev);

	/* free allocated rx buffer */
	dmfe_free_rxbuffer(db);

#if 0
	/* show statistic counter */
	printk(DRV_NAME ": FU:%lx EC:%lx LC:%lx NC:%lx"
		" LOC:%lx TXJT:%lx RESET:%lx RCR8:%lx FAL:%lx TT:%lx\n",
		db->tx_fifo_underrun, db->tx_excessive_collision,
		db->tx_late_collision, db->tx_no_carrier, db->tx_loss_carrier,
		db->tx_jabber_timeout, db->reset_count, db->reset_cr8,
		db->reset_fatal, db->reset_TXtimeout);
#endif

	return 0;
}


/*
 *	DM9102 insterrupt handler
 *	receive the packet to upper layer, free the transmitted packet
 */

static irqreturn_t dmfe_interrupt(int irq, void *dev_id)
{
	struct DEVICE *dev = dev_id;
	struct dmfe_board_info *db = netdev_priv(dev);
	unsigned long ioaddr = dev->base_addr;
	unsigned long flags;

	DMFE_DBUG(0, "dmfe_interrupt()", 0);

	spin_lock_irqsave(&db->lock, flags);

	/* Got DM910X status */
	db->cr5_data = inl(ioaddr + DCR5);
	outl(db->cr5_data, ioaddr + DCR5);
	if ( !(db->cr5_data & 0xc1) ) {
		spin_unlock_irqrestore(&db->lock, flags);
		return IRQ_HANDLED;
	}

	/* Disable all interrupt in CR7 to solve the interrupt edge problem */
	outl(0, ioaddr + DCR7);

	/* Check system status */
	if (db->cr5_data & 0x2000) {
		/* system bus error happen */
		DMFE_DBUG(1, "System bus error happen. CR5=", db->cr5_data);
		db->reset_fatal++;
		db->wait_reset = 1;	/* Need to RESET */
		spin_unlock_irqrestore(&db->lock, flags);
		return IRQ_HANDLED;
	}

	 /* Received the coming packet */
	if ( (db->cr5_data & 0x40) && db->rx_avail_cnt )
		dmfe_rx_packet(dev, db);

	/* reallocate rx descriptor buffer */
	if (db->rx_avail_cnt<RX_DESC_CNT)
		allocate_rx_buffer(db);

	/* Free the transmitted descriptor */
	if ( db->cr5_data & 0x01)
		dmfe_free_tx_pkt(dev, db);

	/* Mode Check */
	if (db->dm910x_chk_mode & 0x2) {
		db->dm910x_chk_mode = 0x4;
		db->cr6_data |= 0x100;
		update_cr6(db->cr6_data, db->ioaddr);
	}

	/* Restore CR7 to enable interrupt mask */
	outl(db->cr7_data, ioaddr + DCR7);

	spin_unlock_irqrestore(&db->lock, flags);
	return IRQ_HANDLED;
}


#ifdef CONFIG_NET_POLL_CONTROLLER
/*
 * Polling 'interrupt' - used by things like netconsole to send skbs
 * without having to re-enable interrupts. It's not called while
 * the interrupt routine is executing.
 */

static void poll_dmfe (struct net_device *dev)
{
	/* disable_irq here is not very nice, but with the lockless
	   interrupt handler we have no other choice. */
	disable_irq(dev->irq);
	dmfe_interrupt (dev->irq, dev);
	enable_irq(dev->irq);
}
#endif

/*
 *	Free TX resource after TX complete
 */

static void dmfe_free_tx_pkt(struct DEVICE *dev, struct dmfe_board_info * db)
{
	struct tx_desc *txptr;
	unsigned long ioaddr = dev->base_addr;
	u32 tdes0;

	txptr = db->tx_remove_ptr;
	while(db->tx_packet_cnt) {
		tdes0 = le32_to_cpu(txptr->tdes0);
		/* printk(DRV_NAME ": tdes0=%x\n", tdes0); */
		if (tdes0 & 0x80000000)
			break;

		/* A packet sent completed */
		db->tx_packet_cnt--;
		db->stats.tx_packets++;

		/* Transmit statistic counter */
		if ( tdes0 != 0x7fffffff ) {
			/* printk(DRV_NAME ": tdes0=%x\n", tdes0); */
			db->stats.collisions += (tdes0 >> 3) & 0xf;
			db->stats.tx_bytes += le32_to_cpu(txptr->tdes1) & 0x7ff;
			if (tdes0 & TDES0_ERR_MASK) {
				db->stats.tx_errors++;

				if (tdes0 & 0x0002) {	/* UnderRun */
					db->tx_fifo_underrun++;
					if ( !(db->cr6_data & CR6_SFT) ) {
						db->cr6_data = db->cr6_data | CR6_SFT;
						update_cr6(db->cr6_data, db->ioaddr);
					}
				}
				if (tdes0 & 0x0100)
					db->tx_excessive_collision++;
				if (tdes0 & 0x0200)
					db->tx_late_collision++;
				if (tdes0 & 0x0400)
					db->tx_no_carrier++;
				if (tdes0 & 0x0800)
					db->tx_loss_carrier++;
				if (tdes0 & 0x4000)
					db->tx_jabber_timeout++;
			}
		}

    		txptr = txptr->next_tx_desc;
	}/* End of while */

	/* Update TX remove pointer to next */
	db->tx_remove_ptr = txptr;

	/* Send the Tx packet in queue */
	if ( (db->tx_packet_cnt < TX_MAX_SEND_CNT) && db->tx_queue_cnt ) {
		txptr->tdes0 = cpu_to_le32(0x80000000);	/* Set owner bit */
		db->tx_packet_cnt++;			/* Ready to send */
		db->tx_queue_cnt--;
		outl(0x1, ioaddr + DCR1);		/* Issue Tx polling */
		dev->trans_start = jiffies;		/* saved time stamp */
	}

	/* Resource available check */
	if ( db->tx_queue_cnt < TX_WAKE_DESC_CNT )
		netif_wake_queue(dev);	/* Active upper layer, send again */
}


/*
 *	Calculate the CRC valude of the Rx packet
 *	flag = 	1 : return the reverse CRC (for the received packet CRC)
 *		0 : return the normal CRC (for Hash Table index)
 */

static inline u32 cal_CRC(unsigned char * Data, unsigned int Len, u8 flag)
{
	u32 crc = crc32(~0, Data, Len);
	if (flag) crc = ~crc;
	return crc;
}


/*
 *	Receive the come packet and pass to upper layer
 */

static void dmfe_rx_packet(struct DEVICE *dev, struct dmfe_board_info * db)
{
	struct rx_desc *rxptr;
	struct sk_buff *skb, *newskb;
	int rxlen;
	u32 rdes0;

	rxptr = db->rx_ready_ptr;

	while(db->rx_avail_cnt) {
		rdes0 = le32_to_cpu(rxptr->rdes0);
		if (rdes0 & 0x80000000)	/* packet owner check */
			break;

		db->rx_avail_cnt--;
		db->interval_rx_cnt++;

		pci_unmap_single(db->pdev, le32_to_cpu(rxptr->rdes2),
				 RX_ALLOC_SIZE, PCI_DMA_FROMDEVICE);

		if ( (rdes0 & 0x300) != 0x300) {
			/* A packet without First/Last flag */
			/* reuse this SKB */
			DMFE_DBUG(0, "Reuse SK buffer, rdes0", rdes0);
			dmfe_reuse_skb(db, rxptr->rx_skb_ptr);
		} else {
			/* A packet with First/Last flag */
			rxlen = ( (rdes0 >> 16) & 0x3fff) - 4;

			/* error summary bit check */
			if (rdes0 & 0x8000) {
				/* This is a error packet */
				//printk(DRV_NAME ": rdes0: %lx\n", rdes0);
				db->stats.rx_errors++;
				if (rdes0 & 1)
					db->stats.rx_fifo_errors++;
				if (rdes0 & 2)
					db->stats.rx_crc_errors++;
				if (rdes0 & 0x80)
					db->stats.rx_length_errors++;
			}

			if ( !(rdes0 & 0x8000) ||
				((db->cr6_data & CR6_PM) && (rxlen>6)) ) {
				skb = rxptr->rx_skb_ptr;

				/* Received Packet CRC check need or not */
				if ( (db->dm910x_chk_mode & 1) &&
					(cal_CRC(skb->data, rxlen, 1) !=
					(*(u32 *) (skb->data+rxlen) ))) { /* FIXME (?) */
					/* Found a error received packet */
					dmfe_reuse_skb(db, rxptr->rx_skb_ptr);
					db->dm910x_chk_mode = 3;
				} else {
					/* Good packet, send to upper layer */
					/* Shorst packet used new SKB */
					if ((rxlen < RX_COPY_SIZE) &&
						((newskb = dev_alloc_skb(rxlen + 2))
						!= NULL)) {

						skb = newskb;
						/* size less than COPY_SIZE, allocate a rxlen SKB */
						skb->dev = dev;
						skb_reserve(skb, 2); /* 16byte align */
						memcpy(skb_put(skb, rxlen), rxptr->rx_skb_ptr->data, rxlen);
						dmfe_reuse_skb(db, rxptr->rx_skb_ptr);
					} else {
						skb->dev = dev;
						skb_put(skb, rxlen);
					}
					skb->protocol = eth_type_trans(skb, dev);
					netif_rx(skb);
					dev->last_rx = jiffies;
					db->stats.rx_packets++;
					db->stats.rx_bytes += rxlen;
				}
			} else {
				/* Reuse SKB buffer when the packet is error */
				DMFE_DBUG(0, "Reuse SK buffer, rdes0", rdes0);
				dmfe_reuse_skb(db, rxptr->rx_skb_ptr);
			}
		}

		rxptr = rxptr->next_rx_desc;
	}

	db->rx_ready_ptr = rxptr;
}


/*
 *	Get statistics from driver.
 */

static struct net_device_stats * dmfe_get_stats(struct DEVICE *dev)
{
	struct dmfe_board_info *db = netdev_priv(dev);

	DMFE_DBUG(0, "dmfe_get_stats", 0);
	return &db->stats;
}


/*
 * Set DM910X multicast address
 */

static void dmfe_set_filter_mode(struct DEVICE * dev)
{
	struct dmfe_board_info *db = netdev_priv(dev);
	unsigned long flags;

	DMFE_DBUG(0, "dmfe_set_filter_mode()", 0);
	spin_lock_irqsave(&db->lock, flags);

	if (dev->flags & IFF_PROMISC) {
		DMFE_DBUG(0, "Enable PROM Mode", 0);
		db->cr6_data |= CR6_PM | CR6_PBF;
		update_cr6(db->cr6_data, db->ioaddr);
		spin_unlock_irqrestore(&db->lock, flags);
		return;
	}

	if (dev->flags & IFF_ALLMULTI || dev->mc_count > DMFE_MAX_MULTICAST) {
		DMFE_DBUG(0, "Pass all multicast address", dev->mc_count);
		db->cr6_data &= ~(CR6_PM | CR6_PBF);
		db->cr6_data |= CR6_PAM;
		spin_unlock_irqrestore(&db->lock, flags);
		return;
	}

	DMFE_DBUG(0, "Set multicast address", dev->mc_count);
	if (db->chip_id == PCI_DM9132_ID)
		dm9132_id_table(dev, dev->mc_count);	/* DM9132 */
	else
		send_filter_frame(dev, dev->mc_count); 	/* DM9102/DM9102A */
	spin_unlock_irqrestore(&db->lock, flags);
}

static void netdev_get_drvinfo(struct net_device *dev,
			       struct ethtool_drvinfo *info)
{
	struct dmfe_board_info *np = netdev_priv(dev);

	strcpy(info->driver, DRV_NAME);
	strcpy(info->version, DRV_VERSION);
	if (np->pdev)
		strcpy(info->bus_info, pci_name(np->pdev));
	else
		sprintf(info->bus_info, "EISA 0x%lx %d",
			dev->base_addr, dev->irq);
}

static const struct ethtool_ops netdev_ethtool_ops = {
	.get_drvinfo		= netdev_get_drvinfo,
	.get_link               = ethtool_op_get_link,
};

/*
 *	A periodic timer routine
 *	Dynamic media sense, allocate Rx buffer...
 */

static void dmfe_timer(unsigned long data)
{
	u32 tmp_cr8;
	unsigned char tmp_cr12;
	struct DEVICE *dev = (struct DEVICE *) data;
	struct dmfe_board_info *db = netdev_priv(dev);
 	unsigned long flags;

	int link_ok, link_ok_phy;

	DMFE_DBUG(0, "dmfe_timer()", 0);
	spin_lock_irqsave(&db->lock, flags);

	/* Media mode process when Link OK before enter this route */
	if (db->first_in_callback == 0) {
		db->first_in_callback = 1;
		if (db->chip_type && (db->chip_id==PCI_DM9102_ID)) {
			db->cr6_data &= ~0x40000;
			update_cr6(db->cr6_data, db->ioaddr);
			phy_write(db->ioaddr,
				  db->phy_addr, 0, 0x1000, db->chip_id);
			db->cr6_data |= 0x40000;
			update_cr6(db->cr6_data, db->ioaddr);
			db->timer.expires = DMFE_TIMER_WUT + HZ * 2;
			add_timer(&db->timer);
			spin_unlock_irqrestore(&db->lock, flags);
			return;
		}
	}


	/* Operating Mode Check */
	if ( (db->dm910x_chk_mode & 0x1) &&
		(db->stats.rx_packets > MAX_CHECK_PACKET) )
		db->dm910x_chk_mode = 0x4;

	/* Dynamic reset DM910X : system error or transmit time-out */
	tmp_cr8 = inl(db->ioaddr + DCR8);
	if ( (db->interval_rx_cnt==0) && (tmp_cr8) ) {
		db->reset_cr8++;
		db->wait_reset = 1;
	}
	db->interval_rx_cnt = 0;

	/* TX polling kick monitor */
	if ( db->tx_packet_cnt &&
	     time_after(jiffies, dev->trans_start + DMFE_TX_KICK) ) {
		outl(0x1, dev->base_addr + DCR1);   /* Tx polling again */

		/* TX Timeout */
		if ( time_after(jiffies, dev->trans_start + DMFE_TX_TIMEOUT) ) {
			db->reset_TXtimeout++;
			db->wait_reset = 1;
			printk(KERN_WARNING "%s: Tx timeout - resetting\n",
			       dev->name);
		}
	}

	if (db->wait_reset) {
		DMFE_DBUG(0, "Dynamic Reset device", db->tx_packet_cnt);
		db->reset_count++;
		dmfe_dynamic_reset(dev);
		db->first_in_callback = 0;
		db->timer.expires = DMFE_TIMER_WUT;
		add_timer(&db->timer);
		spin_unlock_irqrestore(&db->lock, flags);
		return;
	}

	/* Link status check, Dynamic media type change */
	if (db->chip_id == PCI_DM9132_ID)
		tmp_cr12 = inb(db->ioaddr + DCR9 + 3);	/* DM9132 */
	else
		tmp_cr12 = inb(db->ioaddr + DCR12);	/* DM9102/DM9102A */

	if ( ((db->chip_id == PCI_DM9102_ID) &&
		(db->chip_revision == 0x02000030)) ||
		((db->chip_id == PCI_DM9132_ID) &&
		(db->chip_revision == 0x02000010)) ) {
		/* DM9102A Chip */
		if (tmp_cr12 & 2)
			link_ok = 0;
		else
			link_ok = 1;
	}
	else
		/*0x43 is used instead of 0x3 because bit 6 should represent
			link status of external PHY */
		link_ok = (tmp_cr12 & 0x43) ? 1 : 0;


	/* If chip reports that link is failed it could be because external
		PHY link status pin is not conected correctly to chip
		To be sure ask PHY too.
	*/

	/* need a dummy read because of PHY's register latch*/
	phy_read (db->ioaddr, db->phy_addr, 1, db->chip_id);
	link_ok_phy = (phy_read (db->ioaddr,
		       db->phy_addr, 1, db->chip_id) & 0x4) ? 1 : 0;

	if (link_ok_phy != link_ok) {
		DMFE_DBUG (0, "PHY and chip report different link status", 0);
		link_ok = link_ok | link_ok_phy;
 	}

	if ( !link_ok && netif_carrier_ok(dev)) {
		/* Link Failed */
		DMFE_DBUG(0, "Link Failed", tmp_cr12);
		netif_carrier_off(dev);

		/* For Force 10/100M Half/Full mode: Enable Auto-Nego mode */
		/* AUTO or force 1M Homerun/Longrun don't need */
		if ( !(db->media_mode & 0x38) )
			phy_write(db->ioaddr, db->phy_addr,
				  0, 0x1000, db->chip_id);

		/* AUTO mode, if INT phyxcer link failed, select EXT device */
		if (db->media_mode & DMFE_AUTO) {
			/* 10/100M link failed, used 1M Home-Net */
			db->cr6_data|=0x00040000;	/* bit18=1, MII */
			db->cr6_data&=~0x00000200;	/* bit9=0, HD mode */
			update_cr6(db->cr6_data, db->ioaddr);
		}
	} else if (!netif_carrier_ok(dev)) {

		DMFE_DBUG(0, "Link link OK", tmp_cr12);

		/* Auto Sense Speed */
		if ( !(db->media_mode & DMFE_AUTO) || !dmfe_sense_speed(db)) {
			netif_carrier_on(dev);
			SHOW_MEDIA_TYPE(db->op_mode);
		}

		dmfe_process_mode(db);
	}

	/* HPNA remote command check */
	if (db->HPNA_command & 0xf00) {
		db->HPNA_timer--;
		if (!db->HPNA_timer)
			dmfe_HPNA_remote_cmd_chk(db);
	}

	/* Timer active again */
	db->timer.expires = DMFE_TIMER_WUT;
	add_timer(&db->timer);
	spin_unlock_irqrestore(&db->lock, flags);
}


/*
 *	Dynamic reset the DM910X board
 *	Stop DM910X board
 *	Free Tx/Rx allocated memory
 *	Reset DM910X board
 *	Re-initilize DM910X board
 */

static void dmfe_dynamic_reset(struct DEVICE *dev)
{
	struct dmfe_board_info *db = netdev_priv(dev);

	DMFE_DBUG(0, "dmfe_dynamic_reset()", 0);

	/* Sopt MAC controller */
	db->cr6_data &= ~(CR6_RXSC | CR6_TXSC);	/* Disable Tx/Rx */
	update_cr6(db->cr6_data, dev->base_addr);
	outl(0, dev->base_addr + DCR7);		/* Disable Interrupt */
	outl(inl(dev->base_addr + DCR5), dev->base_addr + DCR5);

	/* Disable upper layer interface */
	netif_stop_queue(dev);

	/* Free Rx Allocate buffer */
	dmfe_free_rxbuffer(db);

	/* system variable init */
	db->tx_packet_cnt = 0;
	db->tx_queue_cnt = 0;
	db->rx_avail_cnt = 0;
	netif_carrier_off(dev);
	db->wait_reset = 0;

	/* Re-initilize DM910X board */
	dmfe_init_dm910x(dev);

	/* Restart upper layer interface */
	netif_wake_queue(dev);
}


/*
 *	free all allocated rx buffer
 */

static void dmfe_free_rxbuffer(struct dmfe_board_info * db)
{
	DMFE_DBUG(0, "dmfe_free_rxbuffer()", 0);

	/* free allocated rx buffer */
	while (db->rx_avail_cnt) {
		dev_kfree_skb(db->rx_ready_ptr->rx_skb_ptr);
		db->rx_ready_ptr = db->rx_ready_ptr->next_rx_desc;
		db->rx_avail_cnt--;
	}
}


/*
 *	Reuse the SK buffer
 */

static void dmfe_reuse_skb(struct dmfe_board_info *db, struct sk_buff * skb)
{
	struct rx_desc *rxptr = db->rx_insert_ptr;

	if (!(rxptr->rdes0 & cpu_to_le32(0x80000000))) {
		rxptr->rx_skb_ptr = skb;
		rxptr->rdes2 = cpu_to_le32( pci_map_single(db->pdev,
			    skb->data, RX_ALLOC_SIZE, PCI_DMA_FROMDEVICE) );
		wmb();
		rxptr->rdes0 = cpu_to_le32(0x80000000);
		db->rx_avail_cnt++;
		db->rx_insert_ptr = rxptr->next_rx_desc;
	} else
		DMFE_DBUG(0, "SK Buffer reuse method error", db->rx_avail_cnt);
}


/*
 *	Initialize transmit/Receive descriptor
 *	Using Chain structure, and allocate Tx/Rx buffer
 */

static void dmfe_descriptor_init(struct dmfe_board_info *db, unsigned long ioaddr)
{
	struct tx_desc *tmp_tx;
	struct rx_desc *tmp_rx;
	unsigned char *tmp_buf;
	dma_addr_t tmp_tx_dma, tmp_rx_dma;
	dma_addr_t tmp_buf_dma;
	int i;

	DMFE_DBUG(0, "dmfe_descriptor_init()", 0);

	/* tx descriptor start pointer */
	db->tx_insert_ptr = db->first_tx_desc;
	db->tx_remove_ptr = db->first_tx_desc;
	outl(db->first_tx_desc_dma, ioaddr + DCR4);     /* TX DESC address */

	/* rx descriptor start pointer */
	db->first_rx_desc = (void *)db->first_tx_desc +
			sizeof(struct tx_desc) * TX_DESC_CNT;

	db->first_rx_desc_dma =  db->first_tx_desc_dma +
			sizeof(struct tx_desc) * TX_DESC_CNT;
	db->rx_insert_ptr = db->first_rx_desc;
	db->rx_ready_ptr = db->first_rx_desc;
	outl(db->first_rx_desc_dma, ioaddr + DCR3);	/* RX DESC address */

	/* Init Transmit chain */
	tmp_buf = db->buf_pool_start;
	tmp_buf_dma = db->buf_pool_dma_start;
	tmp_tx_dma = db->first_tx_desc_dma;
	for (tmp_tx = db->first_tx_desc, i = 0; i < TX_DESC_CNT; i++, tmp_tx++) {
		tmp_tx->tx_buf_ptr = tmp_buf;
		tmp_tx->tdes0 = cpu_to_le32(0);
		tmp_tx->tdes1 = cpu_to_le32(0x81000000);	/* IC, chain */
		tmp_tx->tdes2 = cpu_to_le32(tmp_buf_dma);
		tmp_tx_dma += sizeof(struct tx_desc);
		tmp_tx->tdes3 = cpu_to_le32(tmp_tx_dma);
		tmp_tx->next_tx_desc = tmp_tx + 1;
		tmp_buf = tmp_buf + TX_BUF_ALLOC;
		tmp_buf_dma = tmp_buf_dma + TX_BUF_ALLOC;
	}
	(--tmp_tx)->tdes3 = cpu_to_le32(db->first_tx_desc_dma);
	tmp_tx->next_tx_desc = db->first_tx_desc;

	 /* Init Receive descriptor chain */
	tmp_rx_dma=db->first_rx_desc_dma;
	for (tmp_rx = db->first_rx_desc, i = 0; i < RX_DESC_CNT; i++, tmp_rx++) {
		tmp_rx->rdes0 = cpu_to_le32(0);
		tmp_rx->rdes1 = cpu_to_le32(0x01000600);
		tmp_rx_dma += sizeof(struct rx_desc);
		tmp_rx->rdes3 = cpu_to_le32(tmp_rx_dma);
		tmp_rx->next_rx_desc = tmp_rx + 1;
	}
	(--tmp_rx)->rdes3 = cpu_to_le32(db->first_rx_desc_dma);
	tmp_rx->next_rx_desc = db->first_rx_desc;

	/* pre-allocate Rx buffer */
	allocate_rx_buffer(db);
}


/*
 *	Update CR6 value
 *	Firstly stop DM910X , then written value and start
 */

static void update_cr6(u32 cr6_data, unsigned long ioaddr)
{
	u32 cr6_tmp;

	cr6_tmp = cr6_data & ~0x2002;           /* stop Tx/Rx */
	outl(cr6_tmp, ioaddr + DCR6);
	udelay(5);
	outl(cr6_data, ioaddr + DCR6);
	udelay(5);
}


/*
 *	Send a setup frame for DM9132
 *	This setup frame initilize DM910X address filter mode
*/

static void dm9132_id_table(struct DEVICE *dev, int mc_cnt)
{
	struct dev_mc_list *mcptr;
	u16 * addrptr;
	unsigned long ioaddr = dev->base_addr+0xc0;		/* ID Table */
	u32 hash_val;
	u16 i, hash_table[4];

	DMFE_DBUG(0, "dm9132_id_table()", 0);

	/* Node address */
	addrptr = (u16 *) dev->dev_addr;
	outw(addrptr[0], ioaddr);
	ioaddr += 4;
	outw(addrptr[1], ioaddr);
	ioaddr += 4;
	outw(addrptr[2], ioaddr);
	ioaddr += 4;

	/* Clear Hash Table */
	for (i = 0; i < 4; i++)
		hash_table[i] = 0x0;

	/* broadcast address */
	hash_table[3] = 0x8000;

	/* the multicast address in Hash Table : 64 bits */
	for (mcptr = dev->mc_list, i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
		hash_val = cal_CRC( (char *) mcptr->dmi_addr, 6, 0) & 0x3f;
		hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
	}

	/* Write the hash table to MAC MD table */
	for (i = 0; i < 4; i++, ioaddr += 4)
		outw(hash_table[i], ioaddr);
}


/*
 *	Send a setup frame for DM9102/DM9102A
 *	This setup frame initilize DM910X address filter mode
 */

static void send_filter_frame(struct DEVICE *dev, int mc_cnt)
{
	struct dmfe_board_info *db = netdev_priv(dev);
	struct dev_mc_list *mcptr;
	struct tx_desc *txptr;
	u16 * addrptr;
	u32 * suptr;
	int i;

	DMFE_DBUG(0, "send_filter_frame()", 0);

	txptr = db->tx_insert_ptr;
	suptr = (u32 *) txptr->tx_buf_ptr;

	/* Node address */
	addrptr = (u16 *) dev->dev_addr;
	*suptr++ = addrptr[0];
	*suptr++ = addrptr[1];
	*suptr++ = addrptr[2];

	/* broadcast address */
	*suptr++ = 0xffff;
	*suptr++ = 0xffff;
	*suptr++ = 0xffff;

	/* fit the multicast address */
	for (mcptr = dev->mc_list, i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
		addrptr = (u16 *) mcptr->dmi_addr;
		*suptr++ = addrptr[0];
		*suptr++ = addrptr[1];
		*suptr++ = addrptr[2];
	}

	for (; i<14; i++) {
		*suptr++ = 0xffff;
		*suptr++ = 0xffff;
		*suptr++ = 0xffff;
	}

	/* prepare the setup frame */
	db->tx_insert_ptr = txptr->next_tx_desc;
	txptr->tdes1 = cpu_to_le32(0x890000c0);

	/* Resource Check and Send the setup packet */
	if (!db->tx_packet_cnt) {
		/* Resource Empty */
		db->tx_packet_cnt++;
		txptr->tdes0 = cpu_to_le32(0x80000000);
		update_cr6(db->cr6_data | 0x2000, dev->base_addr);
		outl(0x1, dev->base_addr + DCR1);	/* Issue Tx polling */
		update_cr6(db->cr6_data, dev->base_addr);
		dev->trans_start = jiffies;
	} else
		db->tx_queue_cnt++;	/* Put in TX queue */
}


/*
 *	Allocate rx buffer,
 *	As possible as allocate maxiumn Rx buffer
 */

static void allocate_rx_buffer(struct dmfe_board_info *db)
{
	struct rx_desc *rxptr;
	struct sk_buff *skb;

	rxptr = db->rx_insert_ptr;

	while(db->rx_avail_cnt < RX_DESC_CNT) {
		if ( ( skb = dev_alloc_skb(RX_ALLOC_SIZE) ) == NULL )
			break;
		rxptr->rx_skb_ptr = skb; /* FIXME (?) */
		rxptr->rdes2 = cpu_to_le32( pci_map_single(db->pdev, skb->data,
				    RX_ALLOC_SIZE, PCI_DMA_FROMDEVICE) );
		wmb();
		rxptr->rdes0 = cpu_to_le32(0x80000000);
		rxptr = rxptr->next_rx_desc;
		db->rx_avail_cnt++;
	}

	db->rx_insert_ptr = rxptr;
}


/*
 *	Read one word data from the serial ROM
 */

static u16 read_srom_word(long ioaddr, int offset)
{
	int i;
	u16 srom_data = 0;
	long cr9_ioaddr = ioaddr + DCR9;

	outl(CR9_SROM_READ, cr9_ioaddr);
	outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);

	/* Send the Read Command 110b */
	SROM_CLK_WRITE(SROM_DATA_1, cr9_ioaddr);
	SROM_CLK_WRITE(SROM_DATA_1, cr9_ioaddr);
	SROM_CLK_WRITE(SROM_DATA_0, cr9_ioaddr);

	/* Send the offset */
	for (i = 5; i >= 0; i--) {
		srom_data = (offset & (1 << i)) ? SROM_DATA_1 : SROM_DATA_0;
		SROM_CLK_WRITE(srom_data, cr9_ioaddr);
	}

	outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);

	for (i = 16; i > 0; i--) {
		outl(CR9_SROM_READ | CR9_SRCS | CR9_SRCLK, cr9_ioaddr);
		udelay(5);
		srom_data = (srom_data << 1) |
				((inl(cr9_ioaddr) & CR9_CRDOUT) ? 1 : 0);
		outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);
		udelay(5);
	}

	outl(CR9_SROM_READ, cr9_ioaddr);
	return srom_data;
}


/*
 *	Auto sense the media mode
 */

static u8 dmfe_sense_speed(struct dmfe_board_info * db)
{
	u8 ErrFlag = 0;
	u16 phy_mode;

	/* CR6 bit18=0, select 10/100M */
	update_cr6( (db->cr6_data & ~0x40000), db->ioaddr);

	phy_mode = phy_read(db->ioaddr, db->phy_addr, 1, db->chip_id);
	phy_mode = phy_read(db->ioaddr, db->phy_addr, 1, db->chip_id);

	if ( (phy_mode & 0x24) == 0x24 ) {
		if (db->chip_id == PCI_DM9132_ID)	/* DM9132 */
			phy_mode = phy_read(db->ioaddr,
				    db->phy_addr, 7, db->chip_id) & 0xf000;
		else 				/* DM9102/DM9102A */
			phy_mode = phy_read(db->ioaddr,
				    db->phy_addr, 17, db->chip_id) & 0xf000;
		/* printk(DRV_NAME ": Phy_mode %x ",phy_mode); */
		switch (phy_mode) {
		case 0x1000: db->op_mode = DMFE_10MHF; break;
		case 0x2000: db->op_mode = DMFE_10MFD; break;
		case 0x4000: db->op_mode = DMFE_100MHF; break;
		case 0x8000: db->op_mode = DMFE_100MFD; break;
		default: db->op_mode = DMFE_10MHF;
			ErrFlag = 1;
			break;
		}
	} else {
		db->op_mode = DMFE_10MHF;
		DMFE_DBUG(0, "Link Failed :", phy_mode);
		ErrFlag = 1;
	}

	return ErrFlag;
}


/*
 *	Set 10/100 phyxcer capability
 *	AUTO mode : phyxcer register4 is NIC capability
 *	Force mode: phyxcer register4 is the force media
 */

static void dmfe_set_phyxcer(struct dmfe_board_info *db)
{
	u16 phy_reg;

	/* Select 10/100M phyxcer */
	db->cr6_data &= ~0x40000;
	update_cr6(db->cr6_data, db->ioaddr);

	/* DM9009 Chip: Phyxcer reg18 bit12=0 */
	if (db->chip_id == PCI_DM9009_ID) {
		phy_reg = phy_read(db->ioaddr,
				   db->phy_addr, 18, db->chip_id) & ~0x1000;

		phy_write(db->ioaddr,
			  db->phy_addr, 18, phy_reg, db->chip_id);
	}

	/* Phyxcer capability setting */
	phy_reg = phy_read(db->ioaddr, db->phy_addr, 4, db->chip_id) & ~0x01e0;

	if (db->media_mode & DMFE_AUTO) {
		/* AUTO Mode */
		phy_reg |= db->PHY_reg4;
	} else {
		/* Force Mode */
		switch(db->media_mode) {
		case DMFE_10MHF: phy_reg |= 0x20; break;
		case DMFE_10MFD: phy_reg |= 0x40; break;
		case DMFE_100MHF: phy_reg |= 0x80; break;
		case DMFE_100MFD: phy_reg |= 0x100; break;
		}
		if (db->chip_id == PCI_DM9009_ID) phy_reg &= 0x61;
	}

  	/* Write new capability to Phyxcer Reg4 */
	if ( !(phy_reg & 0x01e0)) {
		phy_reg|=db->PHY_reg4;
		db->media_mode|=DMFE_AUTO;
	}
	phy_write(db->ioaddr, db->phy_addr, 4, phy_reg, db->chip_id);

 	/* Restart Auto-Negotiation */
	if ( db->chip_type && (db->chip_id == PCI_DM9102_ID) )
		phy_write(db->ioaddr, db->phy_addr, 0, 0x1800, db->chip_id);
	if ( !db->chip_type )
		phy_write(db->ioaddr, db->phy_addr, 0, 0x1200, db->chip_id);
}


/*
 *	Process op-mode
 *	AUTO mode : PHY controller in Auto-negotiation Mode
 *	Force mode: PHY controller in force mode with HUB
 *			N-way force capability with SWITCH
 */

static void dmfe_process_mode(struct dmfe_board_info *db)
{
	u16 phy_reg;

	/* Full Duplex Mode Check */
	if (db->op_mode & 0x4)
		db->cr6_data |= CR6_FDM;	/* Set Full Duplex Bit */
	else
		db->cr6_data &= ~CR6_FDM;	/* Clear Full Duplex Bit */

	/* Transciver Selection */
	if (db->op_mode & 0x10)		/* 1M HomePNA */
		db->cr6_data |= 0x40000;/* External MII select */
	else
		db->cr6_data &= ~0x40000;/* Internal 10/100 transciver */

	update_cr6(db->cr6_data, db->ioaddr);

	/* 10/100M phyxcer force mode need */
	if ( !(db->media_mode & 0x18)) {
		/* Forece Mode */
		phy_reg = phy_read(db->ioaddr, db->phy_addr, 6, db->chip_id);
		if ( !(phy_reg & 0x1) ) {
			/* parter without N-Way capability */
			phy_reg = 0x0;
			switch(db->op_mode) {
			case DMFE_10MHF: phy_reg = 0x0; break;
			case DMFE_10MFD: phy_reg = 0x100; break;
			case DMFE_100MHF: phy_reg = 0x2000; break;
			case DMFE_100MFD: phy_reg = 0x2100; break;
			}
			phy_write(db->ioaddr,
				  db->phy_addr, 0, phy_reg, db->chip_id);
       			if ( db->chip_type && (db->chip_id == PCI_DM9102_ID) )
				mdelay(20);
			phy_write(db->ioaddr,
				  db->phy_addr, 0, phy_reg, db->chip_id);
		}
	}
}


/*
 *	Write a word to Phy register
 */

static void phy_write(unsigned long iobase, u8 phy_addr, u8 offset,
		      u16 phy_data, u32 chip_id)
{
	u16 i;
	unsigned long ioaddr;

	if (chip_id == PCI_DM9132_ID) {
		ioaddr = iobase + 0x80 + offset * 4;
		outw(phy_data, ioaddr);
	} else {
		/* DM9102/DM9102A Chip */
		ioaddr = iobase + DCR9;

		/* Send 33 synchronization clock to Phy controller */
		for (i = 0; i < 35; i++)
			phy_write_1bit(ioaddr, PHY_DATA_1);

		/* Send start command(01) to Phy */
		phy_write_1bit(ioaddr, PHY_DATA_0);
		phy_write_1bit(ioaddr, PHY_DATA_1);

		/* Send write command(01) to Phy */
		phy_write_1bit(ioaddr, PHY_DATA_0);
		phy_write_1bit(ioaddr, PHY_DATA_1);

		/* Send Phy address */
		for (i = 0x10; i > 0; i = i >> 1)
			phy_write_1bit(ioaddr,
				       phy_addr & i ? PHY_DATA_1 : PHY_DATA_0);

		/* Send register address */
		for (i = 0x10; i > 0; i = i >> 1)
			phy_write_1bit(ioaddr,
				       offset & i ? PHY_DATA_1 : PHY_DATA_0);

		/* written trasnition */
		phy_write_1bit(ioaddr, PHY_DATA_1);
		phy_write_1bit(ioaddr, PHY_DATA_0);

		/* Write a word data to PHY controller */
		for ( i = 0x8000; i > 0; i >>= 1)
			phy_write_1bit(ioaddr,
				       phy_data & i ? PHY_DATA_1 : PHY_DATA_0);
	}
}


/*
 *	Read a word data from phy register
 */

static u16 phy_read(unsigned long iobase, u8 phy_addr, u8 offset, u32 chip_id)
{
	int i;
	u16 phy_data;
	unsigned long ioaddr;

	if (chip_id == PCI_DM9132_ID) {
		/* DM9132 Chip */
		ioaddr = iobase + 0x80 + offset * 4;
		phy_data = inw(ioaddr);
	} else {
		/* DM9102/DM9102A Chip */
		ioaddr = iobase + DCR9;

		/* Send 33 synchronization clock to Phy controller */
		for (i = 0; i < 35; i++)
			phy_write_1bit(ioaddr, PHY_DATA_1);

		/* Send start command(01) to Phy */
		phy_write_1bit(ioaddr, PHY_DATA_0);
		phy_write_1bit(ioaddr, PHY_DATA_1);

		/* Send read command(10) to Phy */
		phy_write_1bit(ioaddr, PHY_DATA_1);
		phy_write_1bit(ioaddr, PHY_DATA_0);

		/* Send Phy address */
		for (i = 0x10; i > 0; i = i >> 1)
			phy_write_1bit(ioaddr,
				       phy_addr & i ? PHY_DATA_1 : PHY_DATA_0);

		/* Send register address */
		for (i = 0x10; i > 0; i = i >> 1)
			phy_write_1bit(ioaddr,
				       offset & i ? PHY_DATA_1 : PHY_DATA_0);

		/* Skip transition state */
		phy_read_1bit(ioaddr);

		/* read 16bit data */
		for (phy_data = 0, i = 0; i < 16; i++) {
			phy_data <<= 1;
			phy_data |= phy_read_1bit(ioaddr);
		}
	}

	return phy_data;
}


/*
 *	Write one bit data to Phy Controller
 */

static void phy_write_1bit(unsigned long ioaddr, u32 phy_data)
{
	outl(phy_data, ioaddr);			/* MII Clock Low */
	udelay(1);
	outl(phy_data | MDCLKH, ioaddr);	/* MII Clock High */
	udelay(1);
	outl(phy_data, ioaddr);			/* MII Clock Low */
	udelay(1);
}


/*
 *	Read one bit phy data from PHY controller
 */

static u16 phy_read_1bit(unsigned long ioaddr)
{
	u16 phy_data;

	outl(0x50000, ioaddr);
	udelay(1);
	phy_data = ( inl(ioaddr) >> 19 ) & 0x1;
	outl(0x40000, ioaddr);
	udelay(1);

	return phy_data;
}


/*
 *	Parser SROM and media mode
 */

static void dmfe_parse_srom(struct dmfe_board_info * db)
{
	char * srom = db->srom;
	int dmfe_mode, tmp_reg;

	DMFE_DBUG(0, "dmfe_parse_srom() ", 0);

	/* Init CR15 */
	db->cr15_data = CR15_DEFAULT;

	/* Check SROM Version */
	if ( ( (int) srom[18] & 0xff) == SROM_V41_CODE) {
		/* SROM V4.01 */
		/* Get NIC support media mode */
		db->NIC_capability = le16_to_cpup((__le16 *)srom + 34/2);
		db->PHY_reg4 = 0;
		for (tmp_reg = 1; tmp_reg < 0x10; tmp_reg <<= 1) {
			switch( db->NIC_capability & tmp_reg ) {
			case 0x1: db->PHY_reg4 |= 0x0020; break;
			case 0x2: db->PHY_reg4 |= 0x0040; break;
			case 0x4: db->PHY_reg4 |= 0x0080; break;
			case 0x8: db->PHY_reg4 |= 0x0100; break;
			}
		}

		/* Media Mode Force or not check */
		dmfe_mode = le32_to_cpup((__le32 *)srom + 34/4) &
				le32_to_cpup((__le32 *)srom + 36/4);
		switch(dmfe_mode) {
		case 0x4: dmfe_media_mode = DMFE_100MHF; break;	/* 100MHF */
		case 0x2: dmfe_media_mode = DMFE_10MFD; break;	/* 10MFD */
		case 0x8: dmfe_media_mode = DMFE_100MFD; break;	/* 100MFD */
		case 0x100:
		case 0x200: dmfe_media_mode = DMFE_1M_HPNA; break;/* HomePNA */
		}

		/* Special Function setting */
		/* VLAN function */
		if ( (SF_mode & 0x1) || (srom[43] & 0x80) )
			db->cr15_data |= 0x40;

		/* Flow Control */
		if ( (SF_mode & 0x2) || (srom[40] & 0x1) )
			db->cr15_data |= 0x400;

		/* TX pause packet */
		if ( (SF_mode & 0x4) || (srom[40] & 0xe) )
			db->cr15_data |= 0x9800;
	}

	/* Parse HPNA parameter */
	db->HPNA_command = 1;

	/* Accept remote command or not */
	if (HPNA_rx_cmd == 0)
		db->HPNA_command |= 0x8000;

	 /* Issue remote command & operation mode */
	if (HPNA_tx_cmd == 1)
		switch(HPNA_mode) {	/* Issue Remote Command */
		case 0: db->HPNA_command |= 0x0904; break;
		case 1: db->HPNA_command |= 0x0a00; break;
		case 2: db->HPNA_command |= 0x0506; break;
		case 3: db->HPNA_command |= 0x0602; break;
		}
	else
		switch(HPNA_mode) {	/* Don't Issue */
		case 0: db->HPNA_command |= 0x0004; break;
		case 1: db->HPNA_command |= 0x0000; break;
		case 2: db->HPNA_command |= 0x0006; break;
		case 3: db->HPNA_command |= 0x0002; break;
		}

	/* Check DM9801 or DM9802 present or not */
	db->HPNA_present = 0;
	update_cr6(db->cr6_data|0x40000, db->ioaddr);
	tmp_reg = phy_read(db->ioaddr, db->phy_addr, 3, db->chip_id);
	if ( ( tmp_reg & 0xfff0 ) == 0xb900 ) {
		/* DM9801 or DM9802 present */
		db->HPNA_timer = 8;
		if ( phy_read(db->ioaddr, db->phy_addr, 31, db->chip_id) == 0x4404) {
			/* DM9801 HomeRun */
			db->HPNA_present = 1;
			dmfe_program_DM9801(db, tmp_reg);
		} else {
			/* DM9802 LongRun */
			db->HPNA_present = 2;
			dmfe_program_DM9802(db);
		}
	}

}


/*
 *	Init HomeRun DM9801
 */

static void dmfe_program_DM9801(struct dmfe_board_info * db, int HPNA_rev)
{
	uint reg17, reg25;

	if ( !HPNA_NoiseFloor ) HPNA_NoiseFloor = DM9801_NOISE_FLOOR;
	switch(HPNA_rev) {
	case 0xb900: /* DM9801 E3 */
		db->HPNA_command |= 0x1000;
		reg25 = phy_read(db->ioaddr, db->phy_addr, 24, db->chip_id);
		reg25 = ( (reg25 + HPNA_NoiseFloor) & 0xff) | 0xf000;
		reg17 = phy_read(db->ioaddr, db->phy_addr, 17, db->chip_id);
		break;
	case 0xb901: /* DM9801 E4 */
		reg25 = phy_read(db->ioaddr, db->phy_addr, 25, db->chip_id);
		reg25 = (reg25 & 0xff00) + HPNA_NoiseFloor;
		reg17 = phy_read(db->ioaddr, db->phy_addr, 17, db->chip_id);
		reg17 = (reg17 & 0xfff0) + HPNA_NoiseFloor + 3;
		break;
	case 0xb902: /* DM9801 E5 */
	case 0xb903: /* DM9801 E6 */
	default:
		db->HPNA_command |= 0x1000;
		reg25 = phy_read(db->ioaddr, db->phy_addr, 25, db->chip_id);
		reg25 = (reg25 & 0xff00) + HPNA_NoiseFloor - 5;
		reg17 = phy_read(db->ioaddr, db->phy_addr, 17, db->chip_id);
		reg17 = (reg17 & 0xfff0) + HPNA_NoiseFloor;
		break;
	}
	phy_write(db->ioaddr, db->phy_addr, 16, db->HPNA_command, db->chip_id);
	phy_write(db->ioaddr, db->phy_addr, 17, reg17, db->chip_id);
	phy_write(db->ioaddr, db->phy_addr, 25, reg25, db->chip_id);
}


/*
 *	Init HomeRun DM9802
 */

static void dmfe_program_DM9802(struct dmfe_board_info * db)
{
	uint phy_reg;

	if ( !HPNA_NoiseFloor ) HPNA_NoiseFloor = DM9802_NOISE_FLOOR;
	phy_write(db->ioaddr, db->phy_addr, 16, db->HPNA_command, db->chip_id);
	phy_reg = phy_read(db->ioaddr, db->phy_addr, 25, db->chip_id);
	phy_reg = ( phy_reg & 0xff00) + HPNA_NoiseFloor;
	phy_write(db->ioaddr, db->phy_addr, 25, phy_reg, db->chip_id);
}


/*
 *	Check remote HPNA power and speed status. If not correct,
 *	issue command again.
*/

static void dmfe_HPNA_remote_cmd_chk(struct dmfe_board_info * db)
{
	uint phy_reg;

	/* Got remote device status */
	phy_reg = phy_read(db->ioaddr, db->phy_addr, 17, db->chip_id) & 0x60;
	switch(phy_reg) {
	case 0x00: phy_reg = 0x0a00;break; /* LP/LS */
	case 0x20: phy_reg = 0x0900;break; /* LP/HS */
	case 0x40: phy_reg = 0x0600;break; /* HP/LS */
	case 0x60: phy_reg = 0x0500;break; /* HP/HS */
	}

	/* Check remote device status match our setting ot not */
	if ( phy_reg != (db->HPNA_command & 0x0f00) ) {
		phy_write(db->ioaddr, db->phy_addr, 16, db->HPNA_command,
			  db->chip_id);
		db->HPNA_timer=8;
	} else
		db->HPNA_timer=600;	/* Match, every 10 minutes, check */
}



static struct pci_device_id dmfe_pci_tbl[] = {
	{ 0x1282, 0x9132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, PCI_DM9132_ID },
	{ 0x1282, 0x9102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, PCI_DM9102_ID },
	{ 0x1282, 0x9100, PCI_ANY_ID, PCI_ANY_ID, 0, 0, PCI_DM9100_ID },
	{ 0x1282, 0x9009, PCI_ANY_ID, PCI_ANY_ID, 0, 0, PCI_DM9009_ID },
	{ 0, }
};
MODULE_DEVICE_TABLE(pci, dmfe_pci_tbl);


static struct pci_driver dmfe_driver = {
	.name		= "dmfe",
	.id_table	= dmfe_pci_tbl,
	.probe		= dmfe_init_one,
	.remove		= __devexit_p(dmfe_remove_one),
};

MODULE_AUTHOR("Sten Wang, sten_wang@davicom.com.tw");
MODULE_DESCRIPTION("Davicom DM910X fast ethernet driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

module_param(debug, int, 0);
module_param(mode, byte, 0);
module_param(cr6set, int, 0);
module_param(chkmode, byte, 0);
module_param(HPNA_mode, byte, 0);
module_param(HPNA_rx_cmd, byte, 0);
module_param(HPNA_tx_cmd, byte, 0);
module_param(HPNA_NoiseFloor, byte, 0);
module_param(SF_mode, byte, 0);
MODULE_PARM_DESC(debug, "Davicom DM9xxx enable debugging (0-1)");
MODULE_PARM_DESC(mode, "Davicom DM9xxx: "
		"Bit 0: 10/100Mbps, bit 2: duplex, bit 8: HomePNA");

MODULE_PARM_DESC(SF_mode, "Davicom DM9xxx special function "
		"(bit 0: VLAN, bit 1 Flow Control, bit 2: TX pause packet)");

/*	Description:
 *	when user used insmod to add module, system invoked init_module()
 *	to initilize and register.
 */

static int __init dmfe_init_module(void)
{
	int rc;

	printk(version);
	printed_version = 1;

	DMFE_DBUG(0, "init_module() ", debug);

	if (debug)
		dmfe_debug = debug;	/* set debug flag */
	if (cr6set)
		dmfe_cr6_user_set = cr6set;

 	switch(mode) {
   	case DMFE_10MHF:
	case DMFE_100MHF:
	case DMFE_10MFD:
	case DMFE_100MFD:
	case DMFE_1M_HPNA:
		dmfe_media_mode = mode;
		break;
	default:dmfe_media_mode = DMFE_AUTO;
		break;
	}

	if (HPNA_mode > 4)
		HPNA_mode = 0;		/* Default: LP/HS */
	if (HPNA_rx_cmd > 1)
		HPNA_rx_cmd = 0;	/* Default: Ignored remote cmd */
	if (HPNA_tx_cmd > 1)
		HPNA_tx_cmd = 0;	/* Default: Don't issue remote cmd */
	if (HPNA_NoiseFloor > 15)
		HPNA_NoiseFloor = 0;

	rc = pci_register_driver(&dmfe_driver);
	if (rc < 0)
		return rc;

	return 0;
}


/*
 *	Description:
 *	when user used rmmod to delete module, system invoked clean_module()
 *	to un-register all registered services.
 */

static void __exit dmfe_cleanup_module(void)
{
	DMFE_DBUG(0, "dmfe_clean_module() ", debug);
	pci_unregister_driver(&dmfe_driver);
}

module_init(dmfe_init_module);
module_exit(dmfe_cleanup_module);
