drivers/net/netxen/netxen_nic_niu.c - pub/scm/linux/kernel/git/ash/linux - Git at Google

 /*
  * Copyright (C) 2003 - 2009 NetXen, Inc.
  * All rights reserved.
  *
  * 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.
  *
  * 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.
  *
  * The full GNU General Public License is included in this distribution
  * in the file called LICENSE.
  *
  * Contact Information:
  *    info@netxen.com
  * NetXen Inc,
  * 18922 Forge Drive
  * Cupertino, CA 95014-0701
  *
  */

 #include "netxen_nic.h"

 #define NETXEN_GB_MAC_SOFT_RESET	0x80000000
 #define NETXEN_GB_MAC_RESET_PROT_BLK   0x000F0000
 #define NETXEN_GB_MAC_ENABLE_TX_RX     0x00000005
 #define NETXEN_GB_MAC_PAUSED_FRMS      0x00000020

 static long phy_lock_timeout = 100000000;

 static int phy_lock(struct netxen_adapter *adapter)
 {
 	int i;
 	int done = 0, timeout = 0;

 	while (!done) {
 		done = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM3_LOCK));
 		if (done == 1)
 			break;
 		if (timeout >= phy_lock_timeout) {
 			return -1;
 		}
 		timeout++;
 		if (!in_atomic())
 			schedule();
 		else {
 			for (i = 0; i < 20; i++)
 				cpu_relax();
 		}
 	}

 	NXWR32(adapter, NETXEN_PHY_LOCK_ID, PHY_LOCK_DRIVER);
 	return 0;
 }

 static int phy_unlock(struct netxen_adapter *adapter)
 {
 	adapter->pci_read_immediate(adapter, NETXEN_PCIE_REG(PCIE_SEM3_UNLOCK));

 	return 0;
 }

 /*
  * netxen_niu_gbe_phy_read - read a register from the GbE PHY via
  * mii management interface.
  *
  * Note: The MII management interface goes through port 0.
  *	Individual phys are addressed as follows:
  * @param phy  [15:8]  phy id
  * @param reg  [7:0]   register number
  *
  * @returns  0 on success
  *	  -1 on error
  *
  */
 int netxen_niu_gbe_phy_read(struct netxen_adapter *adapter, long reg,
 				__u32 * readval)
 {
 	long timeout = 0;
 	long result = 0;
 	long restore = 0;
 	long phy = adapter->physical_port;
 	__u32 address;
 	__u32 command;
 	__u32 status;
 	__u32 mac_cfg0;

 	if (phy_lock(adapter) != 0) {
 		return -1;
 	}

 	/*
 	 * MII mgmt all goes through port 0 MAC interface,
 	 * so it cannot be in reset
 	 */

 	mac_cfg0 = NXRD32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0));
 	if (netxen_gb_get_soft_reset(mac_cfg0)) {
 		__u32 temp;
 		temp = 0;
 		netxen_gb_tx_reset_pb(temp);
 		netxen_gb_rx_reset_pb(temp);
 		netxen_gb_tx_reset_mac(temp);
 		netxen_gb_rx_reset_mac(temp);
 		if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0), temp))
 			return -EIO;
 		restore = 1;
 	}

 	address = 0;
 	netxen_gb_mii_mgmt_reg_addr(address, reg);
 	netxen_gb_mii_mgmt_phy_addr(address, phy);
 	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_ADDR(0), address))
 		return -EIO;
 	command = 0;		/* turn off any prior activity */
 	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_COMMAND(0), command))
 		return -EIO;
 	/* send read command */
 	netxen_gb_mii_mgmt_set_read_cycle(command);
 	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_COMMAND(0), command))
 		return -EIO;

 	status = 0;
 	do {
 		status = NXRD32(adapter, NETXEN_NIU_GB_MII_MGMT_INDICATE(0));
 		timeout++;
 	} while ((netxen_get_gb_mii_mgmt_busy(status)
 		  || netxen_get_gb_mii_mgmt_notvalid(status))
 		 && (timeout++ < NETXEN_NIU_PHY_WAITMAX));

 	if (timeout < NETXEN_NIU_PHY_WAITMAX) {
 		*readval = NXRD32(adapter, NETXEN_NIU_GB_MII_MGMT_STATUS(0));
 		result = 0;
 	} else
 		result = -1;

 	if (restore)
 		if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0), mac_cfg0))
 			return -EIO;
 	phy_unlock(adapter);
 	return result;
 }

 /*
  * netxen_niu_gbe_phy_write - write a register to the GbE PHY via
  * mii management interface.
  *
  * Note: The MII management interface goes through port 0.
  *	Individual phys are addressed as follows:
  * @param phy      [15:8]  phy id
  * @param reg      [7:0]   register number
  *
  * @returns  0 on success
  *	  -1 on error
  *
  */
 int netxen_niu_gbe_phy_write(struct netxen_adapter *adapter, long reg,
 				__u32 val)
 {
 	long timeout = 0;
 	long result = 0;
 	long restore = 0;
 	long phy = adapter->physical_port;
 	__u32 address;
 	__u32 command;
 	__u32 status;
 	__u32 mac_cfg0;

 	/*
 	 * MII mgmt all goes through port 0 MAC interface, so it
 	 * cannot be in reset
 	 */

 	mac_cfg0 = NXRD32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0));
 	if (netxen_gb_get_soft_reset(mac_cfg0)) {
 		__u32 temp;
 		temp = 0;
 		netxen_gb_tx_reset_pb(temp);
 		netxen_gb_rx_reset_pb(temp);
 		netxen_gb_tx_reset_mac(temp);
 		netxen_gb_rx_reset_mac(temp);

 		if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0), temp))
 			return -EIO;
 		restore = 1;
 	}

 	command = 0;		/* turn off any prior activity */
 	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_COMMAND(0), command))
 		return -EIO;

 	address = 0;
 	netxen_gb_mii_mgmt_reg_addr(address, reg);
 	netxen_gb_mii_mgmt_phy_addr(address, phy);
 	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_ADDR(0), address))
 		return -EIO;

 	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_CTRL(0), val))
 		return -EIO;

 	status = 0;
 	do {
 		status = NXRD32(adapter, NETXEN_NIU_GB_MII_MGMT_INDICATE(0));
 		timeout++;
 	} while ((netxen_get_gb_mii_mgmt_busy(status))
 		 && (timeout++ < NETXEN_NIU_PHY_WAITMAX));

 	if (timeout < NETXEN_NIU_PHY_WAITMAX)
 		result = 0;
 	else
 		result = -EIO;

 	/* restore the state of port 0 MAC in case we tampered with it */
 	if (restore)
 		if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0), mac_cfg0))
 			return -EIO;

 	return result;
 }

 int netxen_niu_xgbe_enable_phy_interrupts(struct netxen_adapter *adapter)
 {
 	NXWR32(adapter, NETXEN_NIU_INT_MASK, 0x3f);
 	return 0;
 }

 int netxen_niu_gbe_enable_phy_interrupts(struct netxen_adapter *adapter)
 {
 	int result = 0;
 	__u32 enable = 0;
 	netxen_set_phy_int_link_status_changed(enable);
 	netxen_set_phy_int_autoneg_completed(enable);
 	netxen_set_phy_int_speed_changed(enable);

 	if (0 !=
 	    netxen_niu_gbe_phy_write(adapter,
 				     NETXEN_NIU_GB_MII_MGMT_ADDR_INT_ENABLE,
 				     enable))
 		result = -EIO;

 	return result;
 }

 int netxen_niu_xgbe_disable_phy_interrupts(struct netxen_adapter *adapter)
 {
 	NXWR32(adapter, NETXEN_NIU_INT_MASK, 0x7f);
 	return 0;
 }

 int netxen_niu_gbe_disable_phy_interrupts(struct netxen_adapter *adapter)
 {
 	int result = 0;
 	if (0 !=
 	    netxen_niu_gbe_phy_write(adapter,
 				     NETXEN_NIU_GB_MII_MGMT_ADDR_INT_ENABLE, 0))
 		result = -EIO;

 	return result;
 }

 static int netxen_niu_gbe_clear_phy_interrupts(struct netxen_adapter *adapter)
 {
 	int result = 0;
 	if (0 !=
 	    netxen_niu_gbe_phy_write(adapter,
 				     NETXEN_NIU_GB_MII_MGMT_ADDR_INT_STATUS,
 				     -EIO))
 		result = -EIO;

 	return result;
 }

 /*
  * netxen_niu_gbe_set_mii_mode- Set 10/100 Mbit Mode for GbE MAC
  *
  */
 static void netxen_niu_gbe_set_mii_mode(struct netxen_adapter *adapter,
 					int port, long enable)
 {
 	NXWR32(adapter, NETXEN_NIU_MODE, 0x2);
 	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x80000000);
 	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x0000f0025);
 	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_1(port), 0xf1ff);
 	NXWR32(adapter, NETXEN_NIU_GB0_GMII_MODE + (port << 3), 0);
 	NXWR32(adapter, NETXEN_NIU_GB0_MII_MODE + (port << 3), 1);
 	NXWR32(adapter, (NETXEN_NIU_GB0_HALF_DUPLEX + port * 4), 0);
 	NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_CONFIG(port), 0x7);

 	if (enable) {
 		/*
 		 * Do NOT enable flow control until a suitable solution for
 		 *  shutting down pause frames is found.
 		 */
 		NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x5);
 	}

 	if (netxen_niu_gbe_enable_phy_interrupts(adapter))
 		printk(KERN_ERR "ERROR enabling PHY interrupts\n");
 	if (netxen_niu_gbe_clear_phy_interrupts(adapter))
 		printk(KERN_ERR "ERROR clearing PHY interrupts\n");
 }

 /*
  * netxen_niu_gbe_set_gmii_mode- Set GbE Mode for GbE MAC
  */
 static void netxen_niu_gbe_set_gmii_mode(struct netxen_adapter *adapter,
 					 int port, long enable)
 {
 	NXWR32(adapter, NETXEN_NIU_MODE, 0x2);
 	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x80000000);
 	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x0000f0025);
 	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_1(port), 0xf2ff);
 	NXWR32(adapter, NETXEN_NIU_GB0_MII_MODE + (port << 3), 0);
 	NXWR32(adapter, NETXEN_NIU_GB0_GMII_MODE + (port << 3), 1);
 	NXWR32(adapter, (NETXEN_NIU_GB0_HALF_DUPLEX + port * 4), 0);
 	NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_CONFIG(port), 0x7);

 	if (enable) {
 		/*
 		 * Do NOT enable flow control until a suitable solution for
 		 *  shutting down pause frames is found.
 		 */
 		NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x5);
 	}

 	if (netxen_niu_gbe_enable_phy_interrupts(adapter))
 		printk(KERN_ERR "ERROR enabling PHY interrupts\n");
 	if (netxen_niu_gbe_clear_phy_interrupts(adapter))
 		printk(KERN_ERR "ERROR clearing PHY interrupts\n");
 }

 int netxen_niu_gbe_init_port(struct netxen_adapter *adapter, int port)
 {
 	int result = 0;
 	__u32 status;

 	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
 		return 0;

 	if (adapter->disable_phy_interrupts)
 		adapter->disable_phy_interrupts(adapter);
 	mdelay(2);

 	if (0 == netxen_niu_gbe_phy_read(adapter,
 			NETXEN_NIU_GB_MII_MGMT_ADDR_PHY_STATUS, &status)) {
 		if (netxen_get_phy_link(status)) {
 			if (netxen_get_phy_speed(status) == 2) {
 				netxen_niu_gbe_set_gmii_mode(adapter, port, 1);
 			} else if ((netxen_get_phy_speed(status) == 1)
 				   || (netxen_get_phy_speed(status) == 0)) {
 				netxen_niu_gbe_set_mii_mode(adapter, port, 1);
 			} else {
 				result = -1;
 			}

 		} else {
 			/*
 			 * We don't have link. Cable  must be unconnected.
 			 * Enable phy interrupts so we take action when
 			 * plugged in.
 			 */

 			NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port),
 						    NETXEN_GB_MAC_SOFT_RESET);
 			NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port),
 					    NETXEN_GB_MAC_RESET_PROT_BLK |
 					    NETXEN_GB_MAC_ENABLE_TX_RX |
 					    NETXEN_GB_MAC_PAUSED_FRMS);
 			if (netxen_niu_gbe_clear_phy_interrupts(adapter))
 				printk(KERN_ERR
 				       "ERROR clearing PHY interrupts\n");
 			if (netxen_niu_gbe_enable_phy_interrupts(adapter))
 				printk(KERN_ERR
 				       "ERROR enabling PHY interrupts\n");
 			if (netxen_niu_gbe_clear_phy_interrupts(adapter))
 				printk(KERN_ERR
 				       "ERROR clearing PHY interrupts\n");
 			result = -1;
 		}
 	} else {
 		result = -EIO;
 	}
 	return result;
 }

 int netxen_niu_xg_init_port(struct netxen_adapter *adapter, int port)
 {
 	if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
 		NXWR32(adapter, NETXEN_NIU_XGE_CONFIG_1+(0x10000*port), 0x1447);
 		NXWR32(adapter, NETXEN_NIU_XGE_CONFIG_0+(0x10000*port), 0x5);
 	}

 	return 0;
 }

 /* Disable a GbE interface */
 int netxen_niu_disable_gbe_port(struct netxen_adapter *adapter)
 {
 	__u32 mac_cfg0;
 	u32 port = adapter->physical_port;

 	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
 		return 0;

 	if (port > NETXEN_NIU_MAX_GBE_PORTS)
 		return -EINVAL;
 	mac_cfg0 = 0;
 	netxen_gb_soft_reset(mac_cfg0);
 	if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), mac_cfg0))
 		return -EIO;
 	return 0;
 }

 /* Disable an XG interface */
 int netxen_niu_disable_xg_port(struct netxen_adapter *adapter)
 {
 	__u32 mac_cfg;
 	u32 port = adapter->physical_port;

 	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
 		return 0;

 	if (port > NETXEN_NIU_MAX_XG_PORTS)
 		return -EINVAL;

 	mac_cfg = 0;
 	if (NXWR32(adapter,
 			NETXEN_NIU_XGE_CONFIG_0 + (0x10000 * port), mac_cfg))
 		return -EIO;
 	return 0;
 }

 /* Set promiscuous mode for a GbE interface */
 int netxen_niu_set_promiscuous_mode(struct netxen_adapter *adapter,
 		u32 mode)
 {
 	__u32 reg;
 	u32 port = adapter->physical_port;

 	if (port > NETXEN_NIU_MAX_GBE_PORTS)
 		return -EINVAL;

 	/* save previous contents */
 	reg = NXRD32(adapter, NETXEN_NIU_GB_DROP_WRONGADDR);
 	if (mode == NETXEN_NIU_PROMISC_MODE) {
 		switch (port) {
 		case 0:
 			netxen_clear_gb_drop_gb0(reg);
 			break;
 		case 1:
 			netxen_clear_gb_drop_gb1(reg);
 			break;
 		case 2:
 			netxen_clear_gb_drop_gb2(reg);
 			break;
 		case 3:
 			netxen_clear_gb_drop_gb3(reg);
 			break;
 		default:
 			return -EIO;
 		}
 	} else {
 		switch (port) {
 		case 0:
 			netxen_set_gb_drop_gb0(reg);
 			break;
 		case 1:
 			netxen_set_gb_drop_gb1(reg);
 			break;
 		case 2:
 			netxen_set_gb_drop_gb2(reg);
 			break;
 		case 3:
 			netxen_set_gb_drop_gb3(reg);
 			break;
 		default:
 			return -EIO;
 		}
 	}
 	if (NXWR32(adapter, NETXEN_NIU_GB_DROP_WRONGADDR, reg))
 		return -EIO;
 	return 0;
 }

 int netxen_niu_xg_set_promiscuous_mode(struct netxen_adapter *adapter,
 		u32 mode)
 {
 	__u32 reg;
 	u32 port = adapter->physical_port;

 	if (port > NETXEN_NIU_MAX_XG_PORTS)
 		return -EINVAL;

 	reg = NXRD32(adapter, NETXEN_NIU_XGE_CONFIG_1 + (0x10000 * port));
 	if (mode == NETXEN_NIU_PROMISC_MODE)
 		reg = (reg | 0x2000UL);
 	else
 		reg = (reg & ~0x2000UL);

 	if (mode == NETXEN_NIU_ALLMULTI_MODE)
 		reg = (reg | 0x1000UL);
 	else
 		reg = (reg & ~0x1000UL);

 	NXWR32(adapter, NETXEN_NIU_XGE_CONFIG_1 + (0x10000 * port), reg);

 	return 0;
 }

 int netxen_p2_nic_set_mac_addr(struct netxen_adapter *adapter, u8 *addr)
 {
 	u32 mac_hi, mac_lo;
 	u32 reg_hi, reg_lo;

 	u8 phy = adapter->physical_port;
 	u8 phy_count = (adapter->ahw.port_type == NETXEN_NIC_XGBE) ?
 		NETXEN_NIU_MAX_XG_PORTS : NETXEN_NIU_MAX_GBE_PORTS;

 	if (phy >= phy_count)
 		return -EINVAL;

 	mac_lo = ((u32)addr[0] << 16) | ((u32)addr[1] << 24);
 	mac_hi = addr[2] | ((u32)addr[3] << 8) |
 		((u32)addr[4] << 16) | ((u32)addr[5] << 24);

 	if (adapter->ahw.port_type == NETXEN_NIC_XGBE) {
 		reg_lo = NETXEN_NIU_XGE_STATION_ADDR_0_1 + (0x10000 * phy);
 		reg_hi = NETXEN_NIU_XGE_STATION_ADDR_0_HI + (0x10000 * phy);
 	} else {
 		reg_lo = NETXEN_NIU_GB_STATION_ADDR_1(phy);
 		reg_hi = NETXEN_NIU_GB_STATION_ADDR_0(phy);
 	}

 	/* write twice to flush */
 	if (NXWR32(adapter, reg_lo, mac_lo) || NXWR32(adapter, reg_hi, mac_hi))
 		return -EIO;
 	if (NXWR32(adapter, reg_lo, mac_lo) || NXWR32(adapter, reg_hi, mac_hi))
 		return -EIO;

 	return 0;
 }
	/*
	* Copyright (C) 2003 - 2009 NetXen, Inc.
	* All rights reserved.
	*
	* 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.
	*
	* 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.
	*
	* The full GNU General Public License is included in this distribution
	* in the file called LICENSE.
	*
	* Contact Information:
	* info@netxen.com
	* NetXen Inc,
	* 18922 Forge Drive
	* Cupertino, CA 95014-0701
	*
	*/

	#include "netxen_nic.h"

	#define NETXEN_GB_MAC_SOFT_RESET 0x80000000
	#define NETXEN_GB_MAC_RESET_PROT_BLK 0x000F0000
	#define NETXEN_GB_MAC_ENABLE_TX_RX 0x00000005
	#define NETXEN_GB_MAC_PAUSED_FRMS 0x00000020

	static long phy_lock_timeout = 100000000;

	static int phy_lock(struct netxen_adapter *adapter)
	{
	int i;
	int done = 0, timeout = 0;

	while (!done) {
	done = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM3_LOCK));
	if (done == 1)
	break;
	if (timeout >= phy_lock_timeout) {
	return -1;
	}
	timeout++;
	if (!in_atomic())
	schedule();
	else {
	for (i = 0; i < 20; i++)
	cpu_relax();
	}
	}

	NXWR32(adapter, NETXEN_PHY_LOCK_ID, PHY_LOCK_DRIVER);
	return 0;
	}

	static int phy_unlock(struct netxen_adapter *adapter)
	{
	adapter->pci_read_immediate(adapter, NETXEN_PCIE_REG(PCIE_SEM3_UNLOCK));

	return 0;
	}

	/*
	* netxen_niu_gbe_phy_read - read a register from the GbE PHY via
	* mii management interface.
	*
	* Note: The MII management interface goes through port 0.
	* Individual phys are addressed as follows:
	* @param phy [15:8] phy id
	* @param reg [7:0] register number
	*
	* @returns 0 on success
	* -1 on error
	*
	*/
	int netxen_niu_gbe_phy_read(struct netxen_adapter *adapter, long reg,
	__u32 * readval)
	{
	long timeout = 0;
	long result = 0;
	long restore = 0;
	long phy = adapter->physical_port;
	__u32 address;
	__u32 command;
	__u32 status;
	__u32 mac_cfg0;

	if (phy_lock(adapter) != 0) {
	return -1;
	}

	/*
	* MII mgmt all goes through port 0 MAC interface,
	* so it cannot be in reset
	*/

	mac_cfg0 = NXRD32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0));
	if (netxen_gb_get_soft_reset(mac_cfg0)) {
	__u32 temp;
	temp = 0;
	netxen_gb_tx_reset_pb(temp);
	netxen_gb_rx_reset_pb(temp);
	netxen_gb_tx_reset_mac(temp);
	netxen_gb_rx_reset_mac(temp);
	if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0), temp))
	return -EIO;
	restore = 1;
	}

	address = 0;
	netxen_gb_mii_mgmt_reg_addr(address, reg);
	netxen_gb_mii_mgmt_phy_addr(address, phy);
	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_ADDR(0), address))
	return -EIO;
	command = 0; /* turn off any prior activity */
	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_COMMAND(0), command))
	return -EIO;
	/* send read command */
	netxen_gb_mii_mgmt_set_read_cycle(command);
	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_COMMAND(0), command))
	return -EIO;

	status = 0;
	do {
	status = NXRD32(adapter, NETXEN_NIU_GB_MII_MGMT_INDICATE(0));
	timeout++;
	} while ((netxen_get_gb_mii_mgmt_busy(status)
	\|\| netxen_get_gb_mii_mgmt_notvalid(status))
	&& (timeout++ < NETXEN_NIU_PHY_WAITMAX));

	if (timeout < NETXEN_NIU_PHY_WAITMAX) {
	*readval = NXRD32(adapter, NETXEN_NIU_GB_MII_MGMT_STATUS(0));
	result = 0;
	} else
	result = -1;

	if (restore)
	if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0), mac_cfg0))
	return -EIO;
	phy_unlock(adapter);
	return result;
	}

	/*
	* netxen_niu_gbe_phy_write - write a register to the GbE PHY via
	* mii management interface.
	*
	* Note: The MII management interface goes through port 0.
	* Individual phys are addressed as follows:
	* @param phy [15:8] phy id
	* @param reg [7:0] register number
	*
	* @returns 0 on success
	* -1 on error
	*
	*/
	int netxen_niu_gbe_phy_write(struct netxen_adapter *adapter, long reg,
	__u32 val)
	{
	long timeout = 0;
	long result = 0;
	long restore = 0;
	long phy = adapter->physical_port;
	__u32 address;
	__u32 command;
	__u32 status;
	__u32 mac_cfg0;

	/*
	* MII mgmt all goes through port 0 MAC interface, so it
	* cannot be in reset
	*/

	mac_cfg0 = NXRD32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0));
	if (netxen_gb_get_soft_reset(mac_cfg0)) {
	__u32 temp;
	temp = 0;
	netxen_gb_tx_reset_pb(temp);
	netxen_gb_rx_reset_pb(temp);
	netxen_gb_tx_reset_mac(temp);
	netxen_gb_rx_reset_mac(temp);

	if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0), temp))
	return -EIO;
	restore = 1;
	}

	command = 0; /* turn off any prior activity */
	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_COMMAND(0), command))
	return -EIO;

	address = 0;
	netxen_gb_mii_mgmt_reg_addr(address, reg);
	netxen_gb_mii_mgmt_phy_addr(address, phy);
	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_ADDR(0), address))
	return -EIO;

	if (NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_CTRL(0), val))
	return -EIO;

	status = 0;
	do {
	status = NXRD32(adapter, NETXEN_NIU_GB_MII_MGMT_INDICATE(0));
	timeout++;
	} while ((netxen_get_gb_mii_mgmt_busy(status))
	&& (timeout++ < NETXEN_NIU_PHY_WAITMAX));

	if (timeout < NETXEN_NIU_PHY_WAITMAX)
	result = 0;
	else
	result = -EIO;

	/* restore the state of port 0 MAC in case we tampered with it */
	if (restore)
	if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(0), mac_cfg0))
	return -EIO;

	return result;
	}

	int netxen_niu_xgbe_enable_phy_interrupts(struct netxen_adapter *adapter)
	{
	NXWR32(adapter, NETXEN_NIU_INT_MASK, 0x3f);
	return 0;
	}

	int netxen_niu_gbe_enable_phy_interrupts(struct netxen_adapter *adapter)
	{
	int result = 0;
	__u32 enable = 0;
	netxen_set_phy_int_link_status_changed(enable);
	netxen_set_phy_int_autoneg_completed(enable);
	netxen_set_phy_int_speed_changed(enable);

	if (0 !=
	netxen_niu_gbe_phy_write(adapter,
	NETXEN_NIU_GB_MII_MGMT_ADDR_INT_ENABLE,
	enable))
	result = -EIO;

	return result;
	}

	int netxen_niu_xgbe_disable_phy_interrupts(struct netxen_adapter *adapter)
	{
	NXWR32(adapter, NETXEN_NIU_INT_MASK, 0x7f);
	return 0;
	}

	int netxen_niu_gbe_disable_phy_interrupts(struct netxen_adapter *adapter)
	{
	int result = 0;
	if (0 !=
	netxen_niu_gbe_phy_write(adapter,
	NETXEN_NIU_GB_MII_MGMT_ADDR_INT_ENABLE, 0))
	result = -EIO;

	return result;
	}

	static int netxen_niu_gbe_clear_phy_interrupts(struct netxen_adapter *adapter)
	{
	int result = 0;
	if (0 !=
	netxen_niu_gbe_phy_write(adapter,
	NETXEN_NIU_GB_MII_MGMT_ADDR_INT_STATUS,
	-EIO))
	result = -EIO;

	return result;
	}

	/*
	* netxen_niu_gbe_set_mii_mode- Set 10/100 Mbit Mode for GbE MAC
	*
	*/
	static void netxen_niu_gbe_set_mii_mode(struct netxen_adapter *adapter,
	int port, long enable)
	{
	NXWR32(adapter, NETXEN_NIU_MODE, 0x2);
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x80000000);
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x0000f0025);
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_1(port), 0xf1ff);
	NXWR32(adapter, NETXEN_NIU_GB0_GMII_MODE + (port << 3), 0);
	NXWR32(adapter, NETXEN_NIU_GB0_MII_MODE + (port << 3), 1);
	NXWR32(adapter, (NETXEN_NIU_GB0_HALF_DUPLEX + port * 4), 0);
	NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_CONFIG(port), 0x7);

	if (enable) {
	/*
	* Do NOT enable flow control until a suitable solution for
	* shutting down pause frames is found.
	*/
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x5);
	}

	if (netxen_niu_gbe_enable_phy_interrupts(adapter))
	printk(KERN_ERR "ERROR enabling PHY interrupts\n");
	if (netxen_niu_gbe_clear_phy_interrupts(adapter))
	printk(KERN_ERR "ERROR clearing PHY interrupts\n");
	}

	/*
	* netxen_niu_gbe_set_gmii_mode- Set GbE Mode for GbE MAC
	*/
	static void netxen_niu_gbe_set_gmii_mode(struct netxen_adapter *adapter,
	int port, long enable)
	{
	NXWR32(adapter, NETXEN_NIU_MODE, 0x2);
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x80000000);
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x0000f0025);
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_1(port), 0xf2ff);
	NXWR32(adapter, NETXEN_NIU_GB0_MII_MODE + (port << 3), 0);
	NXWR32(adapter, NETXEN_NIU_GB0_GMII_MODE + (port << 3), 1);
	NXWR32(adapter, (NETXEN_NIU_GB0_HALF_DUPLEX + port * 4), 0);
	NXWR32(adapter, NETXEN_NIU_GB_MII_MGMT_CONFIG(port), 0x7);

	if (enable) {
	/*
	* Do NOT enable flow control until a suitable solution for
	* shutting down pause frames is found.
	*/
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), 0x5);
	}

	if (netxen_niu_gbe_enable_phy_interrupts(adapter))
	printk(KERN_ERR "ERROR enabling PHY interrupts\n");
	if (netxen_niu_gbe_clear_phy_interrupts(adapter))
	printk(KERN_ERR "ERROR clearing PHY interrupts\n");
	}

	int netxen_niu_gbe_init_port(struct netxen_adapter *adapter, int port)
	{
	int result = 0;
	__u32 status;

	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
	return 0;

	if (adapter->disable_phy_interrupts)
	adapter->disable_phy_interrupts(adapter);
	mdelay(2);

	if (0 == netxen_niu_gbe_phy_read(adapter,
	NETXEN_NIU_GB_MII_MGMT_ADDR_PHY_STATUS, &status)) {
	if (netxen_get_phy_link(status)) {
	if (netxen_get_phy_speed(status) == 2) {
	netxen_niu_gbe_set_gmii_mode(adapter, port, 1);
	} else if ((netxen_get_phy_speed(status) == 1)
	\|\| (netxen_get_phy_speed(status) == 0)) {
	netxen_niu_gbe_set_mii_mode(adapter, port, 1);
	} else {
	result = -1;
	}

	} else {
	/*
	* We don't have link. Cable must be unconnected.
	* Enable phy interrupts so we take action when
	* plugged in.
	*/

	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port),
	NETXEN_GB_MAC_SOFT_RESET);
	NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port),
	NETXEN_GB_MAC_RESET_PROT_BLK \|
	NETXEN_GB_MAC_ENABLE_TX_RX \|
	NETXEN_GB_MAC_PAUSED_FRMS);
	if (netxen_niu_gbe_clear_phy_interrupts(adapter))
	printk(KERN_ERR
	"ERROR clearing PHY interrupts\n");
	if (netxen_niu_gbe_enable_phy_interrupts(adapter))
	printk(KERN_ERR
	"ERROR enabling PHY interrupts\n");
	if (netxen_niu_gbe_clear_phy_interrupts(adapter))
	printk(KERN_ERR
	"ERROR clearing PHY interrupts\n");
	result = -1;
	}
	} else {
	result = -EIO;
	}
	return result;
	}

	int netxen_niu_xg_init_port(struct netxen_adapter *adapter, int port)
	{
	if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
	NXWR32(adapter, NETXEN_NIU_XGE_CONFIG_1+(0x10000*port), 0x1447);
	NXWR32(adapter, NETXEN_NIU_XGE_CONFIG_0+(0x10000*port), 0x5);
	}

	return 0;
	}

	/* Disable a GbE interface */
	int netxen_niu_disable_gbe_port(struct netxen_adapter *adapter)
	{
	__u32 mac_cfg0;
	u32 port = adapter->physical_port;

	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
	return 0;

	if (port > NETXEN_NIU_MAX_GBE_PORTS)
	return -EINVAL;
	mac_cfg0 = 0;
	netxen_gb_soft_reset(mac_cfg0);
	if (NXWR32(adapter, NETXEN_NIU_GB_MAC_CONFIG_0(port), mac_cfg0))
	return -EIO;
	return 0;
	}

	/* Disable an XG interface */
	int netxen_niu_disable_xg_port(struct netxen_adapter *adapter)
	{
	__u32 mac_cfg;
	u32 port = adapter->physical_port;

	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
	return 0;

	if (port > NETXEN_NIU_MAX_XG_PORTS)
	return -EINVAL;

	mac_cfg = 0;
	if (NXWR32(adapter,
	NETXEN_NIU_XGE_CONFIG_0 + (0x10000 * port), mac_cfg))
	return -EIO;
	return 0;
	}

	/* Set promiscuous mode for a GbE interface */
	int netxen_niu_set_promiscuous_mode(struct netxen_adapter *adapter,
	u32 mode)
	{
	__u32 reg;
	u32 port = adapter->physical_port;

	if (port > NETXEN_NIU_MAX_GBE_PORTS)
	return -EINVAL;

	/* save previous contents */
	reg = NXRD32(adapter, NETXEN_NIU_GB_DROP_WRONGADDR);
	if (mode == NETXEN_NIU_PROMISC_MODE) {
	switch (port) {
	case 0:
	netxen_clear_gb_drop_gb0(reg);
	break;
	case 1:
	netxen_clear_gb_drop_gb1(reg);
	break;
	case 2:
	netxen_clear_gb_drop_gb2(reg);
	break;
	case 3:
	netxen_clear_gb_drop_gb3(reg);
	break;
	default:
	return -EIO;
	}
	} else {
	switch (port) {
	case 0:
	netxen_set_gb_drop_gb0(reg);
	break;
	case 1:
	netxen_set_gb_drop_gb1(reg);
	break;
	case 2:
	netxen_set_gb_drop_gb2(reg);
	break;
	case 3:
	netxen_set_gb_drop_gb3(reg);
	break;
	default:
	return -EIO;
	}
	}
	if (NXWR32(adapter, NETXEN_NIU_GB_DROP_WRONGADDR, reg))
	return -EIO;
	return 0;
	}

	int netxen_niu_xg_set_promiscuous_mode(struct netxen_adapter *adapter,
	u32 mode)
	{
	__u32 reg;
	u32 port = adapter->physical_port;

	if (port > NETXEN_NIU_MAX_XG_PORTS)
	return -EINVAL;

	reg = NXRD32(adapter, NETXEN_NIU_XGE_CONFIG_1 + (0x10000 * port));
	if (mode == NETXEN_NIU_PROMISC_MODE)
	reg = (reg \| 0x2000UL);
	else
	reg = (reg & ~0x2000UL);

	if (mode == NETXEN_NIU_ALLMULTI_MODE)
	reg = (reg \| 0x1000UL);
	else
	reg = (reg & ~0x1000UL);

	NXWR32(adapter, NETXEN_NIU_XGE_CONFIG_1 + (0x10000 * port), reg);

	return 0;
	}

	int netxen_p2_nic_set_mac_addr(struct netxen_adapter adapter, u8 addr)
	{
	u32 mac_hi, mac_lo;
	u32 reg_hi, reg_lo;

	u8 phy = adapter->physical_port;
	u8 phy_count = (adapter->ahw.port_type == NETXEN_NIC_XGBE) ?
	NETXEN_NIU_MAX_XG_PORTS : NETXEN_NIU_MAX_GBE_PORTS;

	if (phy >= phy_count)
	return -EINVAL;

	mac_lo = ((u32)addr[0] << 16) \| ((u32)addr[1] << 24);
	mac_hi = addr[2] \| ((u32)addr[3] << 8) \|
	((u32)addr[4] << 16) \| ((u32)addr[5] << 24);

	if (adapter->ahw.port_type == NETXEN_NIC_XGBE) {
	reg_lo = NETXEN_NIU_XGE_STATION_ADDR_0_1 + (0x10000 * phy);
	reg_hi = NETXEN_NIU_XGE_STATION_ADDR_0_HI + (0x10000 * phy);
	} else {
	reg_lo = NETXEN_NIU_GB_STATION_ADDR_1(phy);
	reg_hi = NETXEN_NIU_GB_STATION_ADDR_0(phy);
	}

	/* write twice to flush */
	if (NXWR32(adapter, reg_lo, mac_lo) \|\| NXWR32(adapter, reg_hi, mac_hi))
	return -EIO;
	if (NXWR32(adapter, reg_lo, mac_lo) \|\| NXWR32(adapter, reg_hi, mac_hi))
	return -EIO;

	return 0;
	}