au1000_eth.c

/*
 *
 * Alchemy Au1x00 ethernet driver
 *
 * Copyright 2001-2003, 2006 MontaVista Software Inc.
 * Copyright 2002 TimeSys Corp.
 * Added ethtool/mii-tool support,
 * Copyright 2004 Matt Porter <mporter@kernel.crashing.org>
 * Update: 2004 Bjoern Riemer, riemer@fokus.fraunhofer.de 
 * or riemer@riemer-nt.de: fixed the link beat detection with 
 * ioctls (SIOCGMIIPHY)
 * Author: MontaVista Software, Inc.
 *         	ppopov@mvista.com or source@mvista.com
 *
 * ########################################################################
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope 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.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * ########################################################################
 *
 * 
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/ioport.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/crc32.h>
#include <asm/mipsregs.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/processor.h>

#include <asm/mach-au1x00/au1000.h>
#include <asm/cpu.h>
#include "au1000_eth.h"

#ifdef AU1000_ETH_DEBUG
static int au1000_debug = 5;
#else
static int au1000_debug = 3;
#endif

#define DRV_NAME	"au1000_eth"
#define DRV_VERSION	"1.5"
#define DRV_AUTHOR	"Pete Popov <ppopov@embeddedalley.com>"
#define DRV_DESC	"Au1xxx on-chip Ethernet driver"

MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION(DRV_DESC);
MODULE_LICENSE("GPL");

// prototypes
static void hard_stop(struct net_device *);
static void enable_rx_tx(struct net_device *dev);
static struct net_device * au1000_probe(int port_num);
static int au1000_init(struct net_device *);
static int au1000_open(struct net_device *);
static int au1000_close(struct net_device *);
static int au1000_tx(struct sk_buff *, struct net_device *);
static int au1000_rx(struct net_device *);
static irqreturn_t au1000_interrupt(int, void *, struct pt_regs *);
static void au1000_tx_timeout(struct net_device *);
static int au1000_set_config(struct net_device *dev, struct ifmap *map);
static void set_rx_mode(struct net_device *);
static struct net_device_stats *au1000_get_stats(struct net_device *);
static void au1000_timer(unsigned long);
static int au1000_ioctl(struct net_device *, struct ifreq *, int);
static int mdio_read(struct net_device *, int, int);
static void mdio_write(struct net_device *, int, int, u16);
static void dump_mii(struct net_device *dev, int phy_id);

// externs
extern  void ack_rise_edge_irq(unsigned int);
extern int get_ethernet_addr(char *ethernet_addr);
extern void str2eaddr(unsigned char *ea, unsigned char *str);
extern char * __init prom_getcmdline(void);

/*
 * Theory of operation
 *
 * The Au1000 MACs use a simple rx and tx descriptor ring scheme. 
 * There are four receive and four transmit descriptors.  These 
 * descriptors are not in memory; rather, they are just a set of 
 * hardware registers.
 *
 * Since the Au1000 has a coherent data cache, the receive and
 * transmit buffers are allocated from the KSEG0 segment. The 
 * hardware registers, however, are still mapped at KSEG1 to
 * make sure there's no out-of-order writes, and that all writes
 * complete immediately.
 */

/* These addresses are only used if yamon doesn't tell us what
 * the mac address is, and the mac address is not passed on the
 * command line.
 */
static unsigned char au1000_mac_addr[6] __devinitdata = { 
	0x00, 0x50, 0xc2, 0x0c, 0x30, 0x00
};

#define nibswap(x) ((((x) >> 4) & 0x0f) | (((x) << 4) & 0xf0))
#define RUN_AT(x) (jiffies + (x))

// For reading/writing 32-bit words from/to DMA memory
#define cpu_to_dma32 cpu_to_be32
#define dma32_to_cpu be32_to_cpu

struct au1000_private *au_macs[NUM_ETH_INTERFACES];

/* FIXME 
 * All of the PHY code really should be detached from the MAC 
 * code.
 */

/* Default advertise */
#define GENMII_DEFAULT_ADVERTISE \
	ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full | \
	ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full | \
	ADVERTISED_Autoneg

#define GENMII_DEFAULT_FEATURES \
	SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | \
	SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | \
	SUPPORTED_Autoneg

int bcm_5201_init(struct net_device *dev, int phy_addr)
{
	s16 data;
	
	/* Stop auto-negotiation */
	data = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, data & ~MII_CNTL_AUTO);

	/* Set advertisement to 10/100 and Half/Full duplex
	 * (full capabilities) */
	data = mdio_read(dev, phy_addr, MII_ANADV);
	data |= MII_NWAY_TX | MII_NWAY_TX_FDX | MII_NWAY_T_FDX | MII_NWAY_T;
	mdio_write(dev, phy_addr, MII_ANADV, data);
	
	/* Restart auto-negotiation */
	data = mdio_read(dev, phy_addr, MII_CONTROL);
	data |= MII_CNTL_RST_AUTO | MII_CNTL_AUTO;
	mdio_write(dev, phy_addr, MII_CONTROL, data);

	if (au1000_debug > 4) 
		dump_mii(dev, phy_addr);
	return 0;
}

int bcm_5201_reset(struct net_device *dev, int phy_addr)
{
	s16 mii_control, timeout;
	
	mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, mii_control | MII_CNTL_RESET);
	mdelay(1);
	for (timeout = 100; timeout > 0; --timeout) {
		mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
		if ((mii_control & MII_CNTL_RESET) == 0)
			break;
		mdelay(1);
	}
	if (mii_control & MII_CNTL_RESET) {
		printk(KERN_ERR "%s PHY reset timeout !\n", dev->name);
		return -1;
	}
	return 0;
}

int 
bcm_5201_status(struct net_device *dev, int phy_addr, u16 *link, u16 *speed)
{
	u16 mii_data;
	struct au1000_private *aup;

	if (!dev) {
		printk(KERN_ERR "bcm_5201_status error: NULL dev\n");
		return -1;
	}
	aup = (struct au1000_private *) dev->priv;

	mii_data = mdio_read(dev, aup->phy_addr, MII_STATUS);
	if (mii_data & MII_STAT_LINK) {
		*link = 1;
		mii_data = mdio_read(dev, aup->phy_addr, MII_AUX_CNTRL);
		if (mii_data & MII_AUX_100) {
			if (mii_data & MII_AUX_FDX) {
				*speed = IF_PORT_100BASEFX;
				dev->if_port = IF_PORT_100BASEFX;
			}
			else {
				*speed = IF_PORT_100BASETX;
				dev->if_port = IF_PORT_100BASETX;
			}
		}
		else  {
			*speed = IF_PORT_10BASET;
			dev->if_port = IF_PORT_10BASET;
		}

	}
	else {
		*link = 0;
		*speed = 0;
		dev->if_port = IF_PORT_UNKNOWN;
	}
	return 0;
}

int lsi_80227_init(struct net_device *dev, int phy_addr)
{
	if (au1000_debug > 4)
		printk("lsi_80227_init\n");

	/* restart auto-negotiation */
	mdio_write(dev, phy_addr, MII_CONTROL,
		   MII_CNTL_F100 | MII_CNTL_AUTO | MII_CNTL_RST_AUTO); // | MII_CNTL_FDX);
	mdelay(1);

	/* set up LEDs to correct display */
#ifdef CONFIG_MIPS_MTX1
	mdio_write(dev, phy_addr, 17, 0xff80);
#else
	mdio_write(dev, phy_addr, 17, 0xffc0);
#endif

	if (au1000_debug > 4)
		dump_mii(dev, phy_addr);
	return 0;
}

int lsi_80227_reset(struct net_device *dev, int phy_addr)
{
	s16 mii_control, timeout;
	
	if (au1000_debug > 4) {
		printk("lsi_80227_reset\n");
		dump_mii(dev, phy_addr);
	}

	mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, mii_control | MII_CNTL_RESET);
	mdelay(1);
	for (timeout = 100; timeout > 0; --timeout) {
		mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
		if ((mii_control & MII_CNTL_RESET) == 0)
			break;
		mdelay(1);
	}
	if (mii_control & MII_CNTL_RESET) {
		printk(KERN_ERR "%s PHY reset timeout !\n", dev->name);
		return -1;
	}
	return 0;
}

int
lsi_80227_status(struct net_device *dev, int phy_addr, u16 *link, u16 *speed)
{
	u16 mii_data;
	struct au1000_private *aup;

	if (!dev) {
		printk(KERN_ERR "lsi_80227_status error: NULL dev\n");
		return -1;
	}
	aup = (struct au1000_private *) dev->priv;

	mii_data = mdio_read(dev, aup->phy_addr, MII_STATUS);
	if (mii_data & MII_STAT_LINK) {
		*link = 1;
		mii_data = mdio_read(dev, aup->phy_addr, MII_LSI_PHY_STAT);
		if (mii_data & MII_LSI_PHY_STAT_SPD) {
			if (mii_data & MII_LSI_PHY_STAT_FDX) {
				*speed = IF_PORT_100BASEFX;
				dev->if_port = IF_PORT_100BASEFX;
			}
			else {
				*speed = IF_PORT_100BASETX;
				dev->if_port = IF_PORT_100BASETX;
			}
		}
		else  {
			*speed = IF_PORT_10BASET;
			dev->if_port = IF_PORT_10BASET;
		}

	}
	else {
		*link = 0;
		*speed = 0;
		dev->if_port = IF_PORT_UNKNOWN;
	}
	return 0;
}

int am79c901_init(struct net_device *dev, int phy_addr)
{
	printk("am79c901_init\n");
	return 0;
}

int am79c901_reset(struct net_device *dev, int phy_addr)
{
	printk("am79c901_reset\n");
	return 0;
}

int 
am79c901_status(struct net_device *dev, int phy_addr, u16 *link, u16 *speed)
{
	return 0;
}

int am79c874_init(struct net_device *dev, int phy_addr)
{
	s16 data;

	/* 79c874 has quit resembled bit assignments to BCM5201 */
	if (au1000_debug > 4)
		printk("am79c847_init\n");

	/* Stop auto-negotiation */
	data = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, data & ~MII_CNTL_AUTO);

	/* Set advertisement to 10/100 and Half/Full duplex
	 * (full capabilities) */
	data = mdio_read(dev, phy_addr, MII_ANADV);
	data |= MII_NWAY_TX | MII_NWAY_TX_FDX | MII_NWAY_T_FDX | MII_NWAY_T;
	mdio_write(dev, phy_addr, MII_ANADV, data);
	
	/* Restart auto-negotiation */
	data = mdio_read(dev, phy_addr, MII_CONTROL);
	data |= MII_CNTL_RST_AUTO | MII_CNTL_AUTO;

	mdio_write(dev, phy_addr, MII_CONTROL, data);

	if (au1000_debug > 4) dump_mii(dev, phy_addr);
	return 0;
}

int am79c874_reset(struct net_device *dev, int phy_addr)
{
	s16 mii_control, timeout;
	
	if (au1000_debug > 4)
		printk("am79c874_reset\n");

	mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, mii_control | MII_CNTL_RESET);
	mdelay(1);
	for (timeout = 100; timeout > 0; --timeout) {
		mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
		if ((mii_control & MII_CNTL_RESET) == 0)
			break;
		mdelay(1);
	}
	if (mii_control & MII_CNTL_RESET) {
		printk(KERN_ERR "%s PHY reset timeout !\n", dev->name);
		return -1;
	}
	return 0;
}

int 
am79c874_status(struct net_device *dev, int phy_addr, u16 *link, u16 *speed)
{
	u16 mii_data;
	struct au1000_private *aup;

	// printk("am79c874_status\n");
	if (!dev) {
		printk(KERN_ERR "am79c874_status error: NULL dev\n");
		return -1;
	}

	aup = (struct au1000_private *) dev->priv;
	mii_data = mdio_read(dev, aup->phy_addr, MII_STATUS);

	if (mii_data & MII_STAT_LINK) {
		*link = 1;
		mii_data = mdio_read(dev, aup->phy_addr, MII_AMD_PHY_STAT);
		if (mii_data & MII_AMD_PHY_STAT_SPD) {
			if (mii_data & MII_AMD_PHY_STAT_FDX) {
				*speed = IF_PORT_100BASEFX;
				dev->if_port = IF_PORT_100BASEFX;
			}
			else {
				*speed = IF_PORT_100BASETX;
				dev->if_port = IF_PORT_100BASETX;
			}
		}
		else {
			*speed = IF_PORT_10BASET;
			dev->if_port = IF_PORT_10BASET;
		}

	}
	else {
		*link = 0;
		*speed = 0;
		dev->if_port = IF_PORT_UNKNOWN;
	}
	return 0;
}

int lxt971a_init(struct net_device *dev, int phy_addr)
{
	if (au1000_debug > 4)
		printk("lxt971a_init\n");

	/* restart auto-negotiation */
	mdio_write(dev, phy_addr, MII_CONTROL,
		   MII_CNTL_F100 | MII_CNTL_AUTO | MII_CNTL_RST_AUTO | MII_CNTL_FDX);

	/* set up LEDs to correct display */
	mdio_write(dev, phy_addr, 20, 0x0422);

	if (au1000_debug > 4)
		dump_mii(dev, phy_addr);
	return 0;
}

int lxt971a_reset(struct net_device *dev, int phy_addr)
{
	s16 mii_control, timeout;
	
	if (au1000_debug > 4) {
		printk("lxt971a_reset\n");
		dump_mii(dev, phy_addr);
	}

	mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, mii_control | MII_CNTL_RESET);
	mdelay(1);
	for (timeout = 100; timeout > 0; --timeout) {
		mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
		if ((mii_control & MII_CNTL_RESET) == 0)
			break;
		mdelay(1);
	}
	if (mii_control & MII_CNTL_RESET) {
		printk(KERN_ERR "%s PHY reset timeout !\n", dev->name);
		return -1;
	}
	return 0;
}

int
lxt971a_status(struct net_device *dev, int phy_addr, u16 *link, u16 *speed)
{
	u16 mii_data;
	struct au1000_private *aup;

	if (!dev) {
		printk(KERN_ERR "lxt971a_status error: NULL dev\n");
		return -1;
	}
	aup = (struct au1000_private *) dev->priv;

	mii_data = mdio_read(dev, aup->phy_addr, MII_STATUS);
	if (mii_data & MII_STAT_LINK) {
		*link = 1;
		mii_data = mdio_read(dev, aup->phy_addr, MII_INTEL_PHY_STAT);
		if (mii_data & MII_INTEL_PHY_STAT_SPD) {
			if (mii_data & MII_INTEL_PHY_STAT_FDX) {
				*speed = IF_PORT_100BASEFX;
				dev->if_port = IF_PORT_100BASEFX;
			}
			else {
				*speed = IF_PORT_100BASETX;
				dev->if_port = IF_PORT_100BASETX;
			}
		}
		else  {
			*speed = IF_PORT_10BASET;
			dev->if_port = IF_PORT_10BASET;
		}

	}
	else {
		*link = 0;
		*speed = 0;
		dev->if_port = IF_PORT_UNKNOWN;
	}
	return 0;
}

int ks8995m_init(struct net_device *dev, int phy_addr)
{
	s16 data;
	
//	printk("ks8995m_init\n");
	/* Stop auto-negotiation */
	data = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, data & ~MII_CNTL_AUTO);

	/* Set advertisement to 10/100 and Half/Full duplex
	 * (full capabilities) */
	data = mdio_read(dev, phy_addr, MII_ANADV);
	data |= MII_NWAY_TX | MII_NWAY_TX_FDX | MII_NWAY_T_FDX | MII_NWAY_T;
	mdio_write(dev, phy_addr, MII_ANADV, data);
	
	/* Restart auto-negotiation */
	data = mdio_read(dev, phy_addr, MII_CONTROL);
	data |= MII_CNTL_RST_AUTO | MII_CNTL_AUTO;
	mdio_write(dev, phy_addr, MII_CONTROL, data);

	if (au1000_debug > 4) dump_mii(dev, phy_addr);

	return 0;
}

int ks8995m_reset(struct net_device *dev, int phy_addr)
{
	s16 mii_control, timeout;
	
//	printk("ks8995m_reset\n");
	mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, mii_control | MII_CNTL_RESET);
	mdelay(1);
	for (timeout = 100; timeout > 0; --timeout) {
		mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
		if ((mii_control & MII_CNTL_RESET) == 0)
			break;
		mdelay(1);
	}
	if (mii_control & MII_CNTL_RESET) {
		printk(KERN_ERR "%s PHY reset timeout !\n", dev->name);
		return -1;
	}
	return 0;
}

int ks8995m_status(struct net_device *dev, int phy_addr, u16 *link, u16 *speed)
{
	u16 mii_data;
	struct au1000_private *aup;

	if (!dev) {
		printk(KERN_ERR "ks8995m_status error: NULL dev\n");
		return -1;
	}
	aup = (struct au1000_private *) dev->priv;

	mii_data = mdio_read(dev, aup->phy_addr, MII_STATUS);
	if (mii_data & MII_STAT_LINK) {
		*link = 1;
		mii_data = mdio_read(dev, aup->phy_addr, MII_AUX_CNTRL);
		if (mii_data & MII_AUX_100) {
			if (mii_data & MII_AUX_FDX) {
				*speed = IF_PORT_100BASEFX;
				dev->if_port = IF_PORT_100BASEFX;
			}
			else {
				*speed = IF_PORT_100BASETX;
				dev->if_port = IF_PORT_100BASETX;
			}
		}
		else  {											
			*speed = IF_PORT_10BASET;
			dev->if_port = IF_PORT_10BASET;
		}

	}
	else {
		*link = 0;
		*speed = 0;
		dev->if_port = IF_PORT_UNKNOWN;
	}
	return 0;
}

int
smsc_83C185_init (struct net_device *dev, int phy_addr)
{
	s16 data;

	if (au1000_debug > 4)
		printk("smsc_83C185_init\n");

	/* Stop auto-negotiation */
	data = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, data & ~MII_CNTL_AUTO);

	/* Set advertisement to 10/100 and Half/Full duplex
	 * (full capabilities) */
	data = mdio_read(dev, phy_addr, MII_ANADV);
	data |= MII_NWAY_TX | MII_NWAY_TX_FDX | MII_NWAY_T_FDX | MII_NWAY_T;
	mdio_write(dev, phy_addr, MII_ANADV, data);
	
	/* Restart auto-negotiation */
	data = mdio_read(dev, phy_addr, MII_CONTROL);
	data |= MII_CNTL_RST_AUTO | MII_CNTL_AUTO;

	mdio_write(dev, phy_addr, MII_CONTROL, data);

	if (au1000_debug > 4) dump_mii(dev, phy_addr);
	return 0;
}

int
smsc_83C185_reset (struct net_device *dev, int phy_addr)
{
	s16 mii_control, timeout;
	
	if (au1000_debug > 4)
		printk("smsc_83C185_reset\n");

	mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
	mdio_write(dev, phy_addr, MII_CONTROL, mii_control | MII_CNTL_RESET);
	mdelay(1);
	for (timeout = 100; timeout > 0; --timeout) {
		mii_control = mdio_read(dev, phy_addr, MII_CONTROL);
		if ((mii_control & MII_CNTL_RESET) == 0)
			break;
		mdelay(1);
	}
	if (mii_control & MII_CNTL_RESET) {
		printk(KERN_ERR "%s PHY reset timeout !\n", dev->name);
		return -1;
	}
	return 0;
}

int 
smsc_83C185_status (struct net_device *dev, int phy_addr, u16 *link, u16 *speed)
{
	u16 mii_data;
	struct au1000_private *aup;

	if (!dev) {
		printk(KERN_ERR "smsc_83C185_status error: NULL dev\n");
		return -1;
	}

	aup = (struct au1000_private *) dev->priv;
	mii_data = mdio_read(dev, aup->phy_addr, MII_STATUS);

	if (mii_data & MII_STAT_LINK) {
		*link = 1;
		mii_data = mdio_read(dev, aup->phy_addr, 0x1f);
		if (mii_data & (1<<3)) {
			if (mii_data & (1<<4)) {
				*speed = IF_PORT_100BASEFX;
				dev->if_port = IF_PORT_100BASEFX;
			}
			else {
				*speed = IF_PORT_100BASETX;
				dev->if_port = IF_PORT_100BASETX;
			}
		}
		else {
			*speed = IF_PORT_10BASET;
			dev->if_port = IF_PORT_10BASET;
		}
	}
	else {
		*link = 0;
		*speed = 0;
		dev->if_port = IF_PORT_UNKNOWN;
	}
	return 0;
}


#ifdef CONFIG_MIPS_BOSPORUS
int stub_init(struct net_device *dev, int phy_addr)
{
	//printk("PHY stub_init\n");
	return 0;
}

int stub_reset(struct net_device *dev, int phy_addr)
{
	//printk("PHY stub_reset\n");
	return 0;
}

int 
stub_status(struct net_device *dev, int phy_addr, u16 *link, u16 *speed)
{
	//printk("PHY stub_status\n");
	*link = 1;
	/* hmmm, revisit */
	*speed = IF_PORT_100BASEFX;
	dev->if_port = IF_PORT_100BASEFX;
	return 0;
}
#endif

struct phy_ops bcm_5201_ops = {
	bcm_5201_init,
	bcm_5201_reset,
	bcm_5201_status,
};

struct phy_ops am79c874_ops = {
	am79c874_init,
	am79c874_reset,
	am79c874_status,
};

struct phy_ops am79c901_ops = {
	am79c901_init,
	am79c901_reset,
	am79c901_status,
};

struct phy_ops lsi_80227_ops = { 
	lsi_80227_init,
	lsi_80227_reset,
	lsi_80227_status,
};

struct phy_ops lxt971a_ops = { 
	lxt971a_init,
	lxt971a_reset,
	lxt971a_status,
};

struct phy_ops ks8995m_ops = {
	ks8995m_init,
	ks8995m_reset,
	ks8995m_status,
};

struct phy_ops smsc_83C185_ops = {
	smsc_83C185_init,
	smsc_83C185_reset,
	smsc_83C185_status,
};

#ifdef CONFIG_MIPS_BOSPORUS
struct phy_ops stub_ops = {
	stub_init,
	stub_reset,
	stub_status,
};
#endif

static struct mii_chip_info {
	const char * name;
	u16 phy_id0;
	u16 phy_id1;
	struct phy_ops *phy_ops;	
	int dual_phy;
} mii_chip_table[] = {
	{"Broadcom BCM5201 10/100 BaseT PHY",0x0040,0x6212, &bcm_5201_ops,0},
	{"Broadcom BCM5221 10/100 BaseT PHY",0x0040,0x61e4, &bcm_5201_ops,0},
	{"Broadcom BCM5222 10/100 BaseT PHY",0x0040,0x6322, &bcm_5201_ops,1},
	{"NS DP83847 PHY", 0x2000, 0x5c30, &bcm_5201_ops ,0},
	{"AMD 79C901 HomePNA PHY",0x0000,0x35c8, &am79c901_ops,0},
	{"AMD 79C874 10/100 BaseT PHY",0x0022,0x561b, &am79c874_ops,0},
	{"LSI 80227 10/100 BaseT PHY",0x0016,0xf840, &lsi_80227_ops,0},
	{"Intel LXT971A Dual Speed PHY",0x0013,0x78e2, &lxt971a_ops,0},
	{"Kendin KS8995M 10/100 BaseT PHY",0x0022,0x1450, &ks8995m_ops,0},
	{"SMSC LAN83C185 10/100 BaseT PHY",0x0007,0xc0a3, &smsc_83C185_ops,0},
#ifdef CONFIG_MIPS_BOSPORUS
	{"Stub", 0x1234, 0x5678, &stub_ops },
#endif
	{0,},
};

static int mdio_read(struct net_device *dev, int phy_id, int reg)
{
	struct au1000_private *aup = (struct au1000_private *) dev->priv;
	volatile u32 *mii_control_reg;
	volatile u32 *mii_data_reg;
	u32 timedout = 20;
	u32 mii_control;

	#ifdef CONFIG_BCM5222_DUAL_PHY
	/* First time we probe, it's for the mac0 phy.
	 * Since we haven't determined yet that we have a dual phy,
	 * aup->mii->mii_control_reg won't be setup and we'll
	 * default to the else statement.
	 * By the time we probe for the mac1 phy, the mii_control_reg
	 * will be setup to be the address of the mac0 phy control since
	 * both phys are controlled through mac0.
	 */
	if (aup->mii && aup->mii->mii_control_reg) {
		mii_control_reg = aup->mii->mii_control_reg;
		mii_data_reg = aup->mii->mii_data_reg;
	}
	else if (au_macs[0]->mii && au_macs[0]->mii->mii_control_reg) {
		/* assume both phys are controlled through mac0 */
		mii_control_reg = au_macs[0]->mii->mii_control_reg;
		mii_data_reg = au_macs[0]->mii->mii_data_reg;
	}
	else 
	#endif
	{
		/* default control and data reg addresses */
		mii_control_reg = &aup->mac->mii_control;
		mii_data_reg = &aup->mac->mii_data;
	}

	while (*mii_control_reg & MAC_MII_BUSY) {
		mdelay(1);
		if (--timedout == 0) {
			printk(KERN_ERR "%s: read_MII busy timeout!!\n", 
					dev->name);
			return -1;
		}
	}

	mii_control = MAC_SET_MII_SELECT_REG(reg) | 
		MAC_SET_MII_SELECT_PHY(phy_id) | MAC_MII_READ;

	*mii_control_reg = mii_control;

	timedout = 20;
	while (*mii_control_reg & MAC_MII_BUSY) {
		mdelay(1);
		if (--timedout == 0) {
			printk(KERN_ERR "%s: mdio_read busy timeout!!\n", 
					dev->name);
			return -1;
		}
	}
	return (int)*mii_data_reg;
}

static void mdio_write(struct net_device *dev, int phy_id, int reg, u16 value)
{
	struct au1000_private *aup = (struct au1000_private *) dev->priv;
	volatile u32 *mii_control_reg;
	volatile u32 *mii_data_reg;
	u32 timedout = 20;
	u32 mii_control;

	#ifdef CONFIG_BCM5222_DUAL_PHY
	if (aup->mii && aup->mii->mii_control_reg) {
		mii_control_reg = aup->mii->mii_control_reg;
		mii_data_reg = aup->mii->mii_data_reg;
	}
	else if (au_macs[0]->mii && au_macs[0]->mii->mii_control_reg) {
		/* assume both phys are controlled through mac0 */
		mii_control_reg = au_macs[0]->mii->mii_control_reg;
		mii_data_reg = au_macs[0]->mii->mii_data_reg;
	}
	else 
	#endif
	{
		/* default control and data reg addresses */
		mii_control_reg = &aup->mac->mii_control;
		mii_data_reg = &aup->mac->mii_data;
	}

	while (*mii_control_reg & MAC_MII_BUSY) {
		mdelay(1);
		if (--timedout == 0) {
			printk(KERN_ERR "%s: mdio_write busy timeout!!\n", 
					dev->name);
			return;
		}
	}

	mii_control = MAC_SET_MII_SELECT_REG(reg) | 
		MAC_SET_MII_SELECT_PHY(phy_id) | MAC_MII_WRITE;

	*mii_data_reg = value;
	*mii_control_reg = mii_control;
}


static void dump_mii(struct net_device *dev, int phy_id)
{
	int i, val;

	for (i = 0; i < 7; i++) {
		if ((val = mdio_read(dev, phy_id, i)) >= 0)
			printk("%s: MII Reg %d=%x\n", dev->name, i, val);
	}
	for (i = 16; i < 25; i++) {
		if ((val = mdio_read(dev, phy_id, i)) >= 0)
			printk("%s: MII Reg %d=%x\n", dev->name, i, val);
	}
}

static int mii_probe (struct net_device * dev)
{
	struct au1000_private *aup = (struct au1000_private *) dev->priv;
	int phy_addr;
#ifdef CONFIG_MIPS_BOSPORUS
	int phy_found=0;
#endif

	/* search for total of 32 possible mii phy addresses */
	for (phy_addr = 0; phy_addr < 32; phy_addr++) {
		u16 mii_status;
		u16 phy_id0, phy_id1;
		int i;

		#ifdef CONFIG_BCM5222_DUAL_PHY
		/* Mask the already found phy, try next one */
		if (au_macs[0]->mii && au_macs[0]->mii->mii_control_reg) {
			if (au_macs[0]->phy_addr == phy_addr)
				continue;
		}
		#endif

		mii_status = mdio_read(dev, phy_addr, MII_STATUS);
		if (mii_status == 0xffff || mii_status == 0x0000)
			/* the mii is not accessable, try next one */
			continue;

		phy_id0 = mdio_read(dev, phy_addr, MII_PHY_ID0);
		phy_id1 = mdio_read(dev, phy_addr, MII_PHY_ID1);

		/* search our mii table for the current mii */ 
		for (i = 0; mii_chip_table[i].phy_id1; i++) {
			if (phy_id0 == mii_chip_table[i].phy_id0 &&
			    phy_id1 == mii_chip_table[i].phy_id1) {
				struct mii_phy * mii_phy = aup->mii;

				printk(KERN_INFO "%s: %s at phy address %d\n",
				       dev->name, mii_chip_table[i].name, 
				       phy_addr);
#ifdef CONFIG_MIPS_BOSPORUS
				phy_found = 1;
#endif
				mii_phy->chip_info = mii_chip_table+i;
				aup->phy_addr = phy_addr;
				aup->want_autoneg = 1;
				aup->phy_ops = mii_chip_table[i].phy_ops;
				aup->phy_ops->phy_init(dev,phy_addr);

				// Check for dual-phy and then store required 
				// values and set indicators. We need to do 
				// this now since mdio_{read,write} need the 
				// control and data register addresses.
				#ifdef CONFIG_BCM5222_DUAL_PHY
				if ( mii_chip_table[i].dual_phy) {

					/* assume both phys are controlled 
					 * through MAC0. Board specific? */
					
					/* sanity check */
					if (!au_macs[0] || !au_macs[0]->mii)
						return -1;
					aup->mii->mii_control_reg = (u32 *)
						&au_macs[0]->mac->mii_control;
					aup->mii->mii_data_reg = (u32 *)
						&au_macs[0]->mac->mii_data;
				}
				#endif
				goto found;
			}
		}
	}
found:

#ifdef CONFIG_MIPS_BOSPORUS
	/* This is a workaround for the Micrel/Kendin 5 port switch
	   The second MAC doesn't see a PHY connected... so we need to
	   trick it into thinking we have one.
		
	   If this kernel is run on another Au1500 development board
	   the stub will be found as well as the actual PHY. However,
	   the last found PHY will be used... usually at Addr 31 (Db1500).	
	*/
	if ( (!phy_found) )
	{
		u16 phy_id0, phy_id1;
		int i;

		phy_id0 = 0x1234;
		phy_id1 = 0x5678;