First Support on Ginger and OMAP TI

[linux-ginger.git] / drivers / staging / et131x / et1310_mac.c

/*
 * Agere Systems Inc.
 * 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs
 *
 * Copyright © 2005 Agere Systems Inc.
 * All rights reserved.
 *   http://www.agere.com
 *
 *------------------------------------------------------------------------------
 *
 * et1310_mac.c - All code and routines pertaining to the MAC
 *
 *------------------------------------------------------------------------------
 *
 * SOFTWARE LICENSE
 *
 * This software is provided subject to the following terms and conditions,
 * which you should read carefully before using the software.  Using this
 * software indicates your acceptance of these terms and conditions.  If you do
 * not agree with these terms and conditions, do not use the software.
 *
 * Copyright © 2005 Agere Systems Inc.
 * All rights reserved.
 *
 * Redistribution and use in source or binary forms, with or without
 * modifications, are permitted provided that the following conditions are met:
 *
 * . Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following Disclaimer as comments in the code as
 *    well as in the documentation and/or other materials provided with the
 *    distribution.
 *
 * . Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following Disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * . Neither the name of Agere Systems Inc. nor the names of the contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * Disclaimer
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  ANY
 * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
 * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 */

#include "et131x_version.h"
#include "et131x_defs.h"

#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>

#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/bitops.h>
#include <linux/pci.h>
#include <asm/system.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include <linux/crc32.h>

#include "et1310_phy.h"
#include "et1310_pm.h"
#include "et1310_jagcore.h"
#include "et1310_mac.h"

#include "et131x_adapter.h"
#include "et131x_initpci.h"

/**
 * ConfigMacRegs1 - Initialize the first part of MAC regs
 * @pAdpater: pointer to our adapter structure
 */
void ConfigMACRegs1(struct et131x_adapter *etdev)
{
        struct _MAC_t __iomem *pMac = &etdev->regs->mac;
        MAC_STATION_ADDR1_t station1;
        MAC_STATION_ADDR2_t station2;
        MAC_IPG_t ipg;
        MAC_HFDP_t hfdp;
        MII_MGMT_CFG_t mii_mgmt_cfg;

        /* First we need to reset everything.  Write to MAC configuration
         * register 1 to perform reset.
         */
        writel(0xC00F0000, &pMac->cfg1.value);

        /* Next lets configure the MAC Inter-packet gap register */
        ipg.bits.non_B2B_ipg_1 = 0x38;          /* 58d */
        ipg.bits.non_B2B_ipg_2 = 0x58;          /* 88d */
        ipg.bits.min_ifg_enforce = 0x50;        /* 80d */
        ipg.bits.B2B_ipg = 0x60;                /* 96d */
        writel(ipg.value, &pMac->ipg.value);

        /* Next lets configure the MAC Half Duplex register */
        hfdp.bits.alt_beb_trunc = 0xA;
        hfdp.bits.alt_beb_enable = 0x0;
        hfdp.bits.bp_no_backoff = 0x0;
        hfdp.bits.no_backoff = 0x0;
        hfdp.bits.excess_defer = 0x1;
        hfdp.bits.rexmit_max = 0xF;
        hfdp.bits.coll_window = 0x37;           /* 55d */
        writel(hfdp.value, &pMac->hfdp.value);

        /* Next lets configure the MAC Interface Control register */
        writel(0, &pMac->if_ctrl.value);

        /* Let's move on to setting up the mii management configuration */
        mii_mgmt_cfg.bits.reset_mii_mgmt = 0;
        mii_mgmt_cfg.bits.scan_auto_incremt = 0;
        mii_mgmt_cfg.bits.preamble_suppress = 0;
        mii_mgmt_cfg.bits.mgmt_clk_reset = 0x7;
        writel(mii_mgmt_cfg.value, &pMac->mii_mgmt_cfg.value);

        /* Next lets configure the MAC Station Address register.  These
         * values are read from the EEPROM during initialization and stored
         * in the adapter structure.  We write what is stored in the adapter
         * structure to the MAC Station Address registers high and low.  This
         * station address is used for generating and checking pause control
         * packets.
         */
        station2.bits.Octet1 = etdev->CurrentAddress[0];
        station2.bits.Octet2 = etdev->CurrentAddress[1];
        station1.bits.Octet3 = etdev->CurrentAddress[2];
        station1.bits.Octet4 = etdev->CurrentAddress[3];
        station1.bits.Octet5 = etdev->CurrentAddress[4];
        station1.bits.Octet6 = etdev->CurrentAddress[5];
        writel(station1.value, &pMac->station_addr_1.value);
        writel(station2.value, &pMac->station_addr_2.value);

        /* Max ethernet packet in bytes that will passed by the mac without
         * being truncated.  Allow the MAC to pass 4 more than our max packet
         * size.  This is 4 for the Ethernet CRC.
         *
         * Packets larger than (RegistryJumboPacket) that do not contain a
         * VLAN ID will be dropped by the Rx function.
         */
        writel(etdev->RegistryJumboPacket + 4, &pMac->max_fm_len.value);

        /* clear out MAC config reset */
        writel(0, &pMac->cfg1.value);
}

/**
 * ConfigMacRegs2 - Initialize the second part of MAC regs
 * @pAdpater: pointer to our adapter structure
 */
void ConfigMACRegs2(struct et131x_adapter *etdev)
{
        int32_t delay = 0;
        struct _MAC_t __iomem *pMac = &etdev->regs->mac;
        MAC_CFG1_t cfg1;
        MAC_CFG2_t cfg2;
        MAC_IF_CTRL_t ifctrl;
        TXMAC_CTL_t ctl;

        ctl.value = readl(&etdev->regs->txmac.ctl.value);
        cfg1.value = readl(&pMac->cfg1.value);
        cfg2.value = readl(&pMac->cfg2.value);
        ifctrl.value = readl(&pMac->if_ctrl.value);

        if (etdev->linkspeed == TRUEPHY_SPEED_1000MBPS) {
                cfg2.bits.if_mode = 0x2;
                ifctrl.bits.phy_mode = 0x0;
        } else {
                cfg2.bits.if_mode = 0x1;
                ifctrl.bits.phy_mode = 0x1;
        }

        /* We need to enable Rx/Tx */
        cfg1.bits.rx_enable = 0x1;
        cfg1.bits.tx_enable = 0x1;

        /* Set up flow control */
        cfg1.bits.tx_flow = 0x1;

        if ((etdev->FlowControl == RxOnly) ||
            (etdev->FlowControl == Both)) {
                cfg1.bits.rx_flow = 0x1;
        } else {
                cfg1.bits.rx_flow = 0x0;
        }

        /* Initialize loop back to off */
        cfg1.bits.loop_back = 0;

        writel(cfg1.value, &pMac->cfg1.value);

        /* Now we need to initialize the MAC Configuration 2 register */
        cfg2.bits.preamble_len = 0x7;
        cfg2.bits.huge_frame = 0x0;
        /* LENGTH FIELD CHECKING bit4: Set this bit to cause the MAC to check
         * the frame's length field to ensure it matches the actual data
         * field length. Clear this bit if no length field checking is
         * desired. Its default is 0.
         */
        cfg2.bits.len_check = 0x1;

        if (etdev->RegistryPhyLoopbk == false) {
                cfg2.bits.pad_crc = 0x1;
                cfg2.bits.crc_enable = 0x1;
        } else {
                cfg2.bits.pad_crc = 0;
                cfg2.bits.crc_enable = 0;
        }

        /* 1 - full duplex, 0 - half-duplex */
        cfg2.bits.full_duplex = etdev->duplex_mode;
        ifctrl.bits.ghd_mode = !etdev->duplex_mode;

        writel(ifctrl.value, &pMac->if_ctrl.value);
        writel(cfg2.value, &pMac->cfg2.value);

        do {
                udelay(10);
                delay++;
                cfg1.value = readl(&pMac->cfg1.value);
        } while ((!cfg1.bits.syncd_rx_en || !cfg1.bits.syncd_tx_en) &&
                                                                 delay < 100);

        if (delay == 100) {
                dev_warn(&etdev->pdev->dev,
                    "Syncd bits did not respond correctly cfg1 word 0x%08x\n",
                        cfg1.value);
        }

        /* Enable TXMAC */
        ctl.bits.txmac_en = 0x1;
        ctl.bits.fc_disable = 0x1;
        writel(ctl.value, &etdev->regs->txmac.ctl.value);

        /* Ready to start the RXDMA/TXDMA engine */
        if (etdev->Flags & fMP_ADAPTER_LOWER_POWER) {
                et131x_rx_dma_enable(etdev);
                et131x_tx_dma_enable(etdev);
        }
}

void ConfigRxMacRegs(struct et131x_adapter *etdev)
{
        struct _RXMAC_t __iomem *pRxMac = &etdev->regs->rxmac;
        RXMAC_WOL_SA_LO_t sa_lo;
        RXMAC_WOL_SA_HI_t sa_hi;
        RXMAC_PF_CTRL_t pf_ctrl = { 0 };

        /* Disable the MAC while it is being configured (also disable WOL) */
        writel(0x8, &pRxMac->ctrl.value);

        /* Initialize WOL to disabled. */
        writel(0, &pRxMac->crc0.value);
        writel(0, &pRxMac->crc12.value);
        writel(0, &pRxMac->crc34.value);

        /* We need to set the WOL mask0 - mask4 next.  We initialize it to
         * its default Values of 0x00000000 because there are not WOL masks
         * as of this time.
         */
        writel(0, &pRxMac->mask0_word0);
        writel(0, &pRxMac->mask0_word1);
        writel(0, &pRxMac->mask0_word2);
        writel(0, &pRxMac->mask0_word3);

        writel(0, &pRxMac->mask1_word0);
        writel(0, &pRxMac->mask1_word1);
        writel(0, &pRxMac->mask1_word2);
        writel(0, &pRxMac->mask1_word3);

        writel(0, &pRxMac->mask2_word0);
        writel(0, &pRxMac->mask2_word1);
        writel(0, &pRxMac->mask2_word2);
        writel(0, &pRxMac->mask2_word3);

        writel(0, &pRxMac->mask3_word0);
        writel(0, &pRxMac->mask3_word1);
        writel(0, &pRxMac->mask3_word2);
        writel(0, &pRxMac->mask3_word3);

        writel(0, &pRxMac->mask4_word0);
        writel(0, &pRxMac->mask4_word1);
        writel(0, &pRxMac->mask4_word2);
        writel(0, &pRxMac->mask4_word3);

        /* Lets setup the WOL Source Address */
        sa_lo.bits.sa3 = etdev->CurrentAddress[2];
        sa_lo.bits.sa4 = etdev->CurrentAddress[3];
        sa_lo.bits.sa5 = etdev->CurrentAddress[4];
        sa_lo.bits.sa6 = etdev->CurrentAddress[5];
        writel(sa_lo.value, &pRxMac->sa_lo.value);

        sa_hi.bits.sa1 = etdev->CurrentAddress[0];
        sa_hi.bits.sa2 = etdev->CurrentAddress[1];
        writel(sa_hi.value, &pRxMac->sa_hi.value);

        /* Disable all Packet Filtering */
        writel(0, &pRxMac->pf_ctrl.value);

        /* Let's initialize the Unicast Packet filtering address */
        if (etdev->PacketFilter & ET131X_PACKET_TYPE_DIRECTED) {
                SetupDeviceForUnicast(etdev);
                pf_ctrl.bits.filter_uni_en = 1;
        } else {
                writel(0, &pRxMac->uni_pf_addr1.value);
                writel(0, &pRxMac->uni_pf_addr2.value);
                writel(0, &pRxMac->uni_pf_addr3.value);
        }

        /* Let's initialize the Multicast hash */
        if (etdev->PacketFilter & ET131X_PACKET_TYPE_ALL_MULTICAST) {
                pf_ctrl.bits.filter_multi_en = 0;
        } else {
                pf_ctrl.bits.filter_multi_en = 1;
                SetupDeviceForMulticast(etdev);
        }

        /* Runt packet filtering.  Didn't work in version A silicon. */
        pf_ctrl.bits.min_pkt_size = NIC_MIN_PACKET_SIZE + 4;
        pf_ctrl.bits.filter_frag_en = 1;

        if (etdev->RegistryJumboPacket > 8192) {
                RXMAC_MCIF_CTRL_MAX_SEG_t mcif_ctrl_max_seg;

                /* In order to transmit jumbo packets greater than 8k, the
                 * FIFO between RxMAC and RxDMA needs to be reduced in size
                 * to (16k - Jumbo packet size).  In order to implement this,
                 * we must use "cut through" mode in the RxMAC, which chops
                 * packets down into segments which are (max_size * 16).  In
                 * this case we selected 256 bytes, since this is the size of
                 * the PCI-Express TLP's that the 1310 uses.
                 */
                mcif_ctrl_max_seg.bits.seg_en = 0x1;
                mcif_ctrl_max_seg.bits.fc_en = 0x0;
                mcif_ctrl_max_seg.bits.max_size = 0x10;

                writel(mcif_ctrl_max_seg.value,
                       &pRxMac->mcif_ctrl_max_seg.value);
        } else {
                writel(0, &pRxMac->mcif_ctrl_max_seg.value);
        }

        /* Initialize the MCIF water marks */
        writel(0, &pRxMac->mcif_water_mark.value);

        /*  Initialize the MIF control */
        writel(0, &pRxMac->mif_ctrl.value);

        /* Initialize the Space Available Register */
        writel(0, &pRxMac->space_avail.value);

        /* Initialize the the mif_ctrl register
         * bit 3:  Receive code error. One or more nibbles were signaled as
         *         errors  during the reception of the packet.  Clear this
         *         bit in Gigabit, set it in 100Mbit.  This was derived
         *         experimentally at UNH.
         * bit 4:  Receive CRC error. The packet's CRC did not match the
         *         internally generated CRC.
         * bit 5:  Receive length check error. Indicates that frame length
         *         field value in the packet does not match the actual data
         *         byte length and is not a type field.
         * bit 16: Receive frame truncated.
         * bit 17: Drop packet enable
         */
        if (etdev->linkspeed == TRUEPHY_SPEED_100MBPS)
                writel(0x30038, &pRxMac->mif_ctrl.value);
        else
                writel(0x30030, &pRxMac->mif_ctrl.value);

        /* Finally we initialize RxMac to be enabled & WOL disabled.  Packet
         * filter is always enabled since it is where the runt packets are
         * supposed to be dropped.  For version A silicon, runt packet
         * dropping doesn't work, so it is disabled in the pf_ctrl register,
         * but we still leave the packet filter on.
         */
        writel(pf_ctrl.value, &pRxMac->pf_ctrl.value);
        writel(0x9, &pRxMac->ctrl.value);
}

void ConfigTxMacRegs(struct et131x_adapter *etdev)
{
        struct _TXMAC_t __iomem *pTxMac = &etdev->regs->txmac;
        TXMAC_CF_PARAM_t Local;

        /* We need to update the Control Frame Parameters
         * cfpt - control frame pause timer set to 64 (0x40)
         * cfep - control frame extended pause timer set to 0x0
         */
        if (etdev->FlowControl == None) {
                writel(0, &pTxMac->cf_param.value);
        } else {
                Local.bits.cfpt = 0x40;
                Local.bits.cfep = 0x0;
                writel(Local.value, &pTxMac->cf_param.value);
        }
}

void ConfigMacStatRegs(struct et131x_adapter *etdev)
{
        struct _MAC_STAT_t __iomem *pDevMacStat =
                &etdev->regs->macStat;

        /* Next we need to initialize all the MAC_STAT registers to zero on
         * the device.
         */
        writel(0, &pDevMacStat->RFcs);
        writel(0, &pDevMacStat->RAln);
        writel(0, &pDevMacStat->RFlr);
        writel(0, &pDevMacStat->RDrp);
        writel(0, &pDevMacStat->RCde);
        writel(0, &pDevMacStat->ROvr);
        writel(0, &pDevMacStat->RFrg);

        writel(0, &pDevMacStat->TScl);
        writel(0, &pDevMacStat->TDfr);
        writel(0, &pDevMacStat->TMcl);
        writel(0, &pDevMacStat->TLcl);
        writel(0, &pDevMacStat->TNcl);
        writel(0, &pDevMacStat->TOvr);
        writel(0, &pDevMacStat->TUnd);

        /* Unmask any counters that we want to track the overflow of.
         * Initially this will be all counters.  It may become clear later
         * that we do not need to track all counters.
         */
        {
                MAC_STAT_REG_1_t Carry1M = { 0xffffffff };

                Carry1M.bits.rdrp = 0;
                Carry1M.bits.rjbr = 1;
                Carry1M.bits.rfrg = 0;
                Carry1M.bits.rovr = 0;
                Carry1M.bits.rund = 1;
                Carry1M.bits.rcse = 1;
                Carry1M.bits.rcde = 0;
                Carry1M.bits.rflr = 0;
                Carry1M.bits.raln = 0;
                Carry1M.bits.rxuo = 1;
                Carry1M.bits.rxpf = 1;
                Carry1M.bits.rxcf = 1;
                Carry1M.bits.rbca = 1;
                Carry1M.bits.rmca = 1;
                Carry1M.bits.rfcs = 0;
                Carry1M.bits.rpkt = 1;
                Carry1M.bits.rbyt = 1;
                Carry1M.bits.trmgv = 1;
                Carry1M.bits.trmax = 1;
                Carry1M.bits.tr1k = 1;
                Carry1M.bits.tr511 = 1;
                Carry1M.bits.tr255 = 1;
                Carry1M.bits.tr127 = 1;
                Carry1M.bits.tr64 = 1;

                writel(Carry1M.value, &pDevMacStat->Carry1M.value);
        }

        {
                MAC_STAT_REG_2_t Carry2M = { 0xffffffff };

                Carry2M.bits.tdrp = 1;
                Carry2M.bits.tpfh = 1;
                Carry2M.bits.tncl = 0;
                Carry2M.bits.txcl = 1;
                Carry2M.bits.tlcl = 0;
                Carry2M.bits.tmcl = 0;
                Carry2M.bits.tscl = 0;
                Carry2M.bits.tedf = 1;
                Carry2M.bits.tdfr = 0;
                Carry2M.bits.txpf = 1;
                Carry2M.bits.tbca = 1;
                Carry2M.bits.tmca = 1;
                Carry2M.bits.tpkt = 1;
                Carry2M.bits.tbyt = 1;
                Carry2M.bits.tfrg = 1;
                Carry2M.bits.tund = 0;
                Carry2M.bits.tovr = 0;
                Carry2M.bits.txcf = 1;
                Carry2M.bits.tfcs = 1;
                Carry2M.bits.tjbr = 1;

                writel(Carry2M.value, &pDevMacStat->Carry2M.value);
        }
}

void ConfigFlowControl(struct et131x_adapter *etdev)
{
        if (etdev->duplex_mode == 0) {
                etdev->FlowControl = None;
        } else {
                char RemotePause, RemoteAsyncPause;

                ET1310_PhyAccessMiBit(etdev,
                                      TRUEPHY_BIT_READ, 5, 10, &RemotePause);
                ET1310_PhyAccessMiBit(etdev,
                                      TRUEPHY_BIT_READ, 5, 11,
                                      &RemoteAsyncPause);

                if ((RemotePause == TRUEPHY_BIT_SET) &&
                    (RemoteAsyncPause == TRUEPHY_BIT_SET)) {
                        etdev->FlowControl = etdev->RegistryFlowControl;
                } else if ((RemotePause == TRUEPHY_BIT_SET) &&
                           (RemoteAsyncPause == TRUEPHY_BIT_CLEAR)) {
                        if (etdev->RegistryFlowControl == Both)
                                etdev->FlowControl = Both;
                        else
                                etdev->FlowControl = None;
                } else if ((RemotePause == TRUEPHY_BIT_CLEAR) &&
                           (RemoteAsyncPause == TRUEPHY_BIT_CLEAR)) {
                        etdev->FlowControl = None;
                } else {/* if (RemotePause == TRUEPHY_CLEAR_BIT &&
                               RemoteAsyncPause == TRUEPHY_SET_BIT) */
                        if (etdev->RegistryFlowControl == Both)
                                etdev->FlowControl = RxOnly;
                        else
                                etdev->FlowControl = None;
                }
        }
}

/**
 * UpdateMacStatHostCounters - Update the local copy of the statistics
 * @etdev: pointer to the adapter structure
 */
void UpdateMacStatHostCounters(struct et131x_adapter *etdev)
{
        struct _ce_stats_t *stats = &etdev->Stats;
        struct _MAC_STAT_t __iomem *pDevMacStat =
                &etdev->regs->macStat;

        stats->collisions += readl(&pDevMacStat->TNcl);
        stats->first_collision += readl(&pDevMacStat->TScl);
        stats->tx_deferred += readl(&pDevMacStat->TDfr);
        stats->excessive_collisions += readl(&pDevMacStat->TMcl);
        stats->late_collisions += readl(&pDevMacStat->TLcl);
        stats->tx_uflo += readl(&pDevMacStat->TUnd);
        stats->max_pkt_error += readl(&pDevMacStat->TOvr);

        stats->alignment_err += readl(&pDevMacStat->RAln);
        stats->crc_err += readl(&pDevMacStat->RCde);
        stats->norcvbuf += readl(&pDevMacStat->RDrp);
        stats->rx_ov_flow += readl(&pDevMacStat->ROvr);
        stats->code_violations += readl(&pDevMacStat->RFcs);
        stats->length_err += readl(&pDevMacStat->RFlr);

        stats->other_errors += readl(&pDevMacStat->RFrg);
}

/**
 * HandleMacStatInterrupt
 * @etdev: pointer to the adapter structure
 *
 * One of the MACSTAT counters has wrapped.  Update the local copy of
 * the statistics held in the adapter structure, checking the "wrap"
 * bit for each counter.
 */
void HandleMacStatInterrupt(struct et131x_adapter *etdev)
{
        MAC_STAT_REG_1_t Carry1;
        MAC_STAT_REG_2_t Carry2;

        /* Read the interrupt bits from the register(s).  These are Clear On
         * Write.
         */
        Carry1.value = readl(&etdev->regs->macStat.Carry1.value);
        Carry2.value = readl(&etdev->regs->macStat.Carry2.value);

        writel(Carry1.value, &etdev->regs->macStat.Carry1.value);
        writel(Carry2.value, &etdev->regs->macStat.Carry2.value);

        /* We need to do update the host copy of all the MAC_STAT counters.
         * For each counter, check it's overflow bit.  If the overflow bit is
         * set, then increment the host version of the count by one complete
         * revolution of the counter.  This routine is called when the counter
         * block indicates that one of the counters has wrapped.
         */
        if (Carry1.bits.rfcs)
                etdev->Stats.code_violations += COUNTER_WRAP_16_BIT;
        if (Carry1.bits.raln)
                etdev->Stats.alignment_err += COUNTER_WRAP_12_BIT;
        if (Carry1.bits.rflr)
                etdev->Stats.length_err += COUNTER_WRAP_16_BIT;
        if (Carry1.bits.rfrg)
                etdev->Stats.other_errors += COUNTER_WRAP_16_BIT;
        if (Carry1.bits.rcde)
                etdev->Stats.crc_err += COUNTER_WRAP_16_BIT;
        if (Carry1.bits.rovr)
                etdev->Stats.rx_ov_flow += COUNTER_WRAP_16_BIT;
        if (Carry1.bits.rdrp)
                etdev->Stats.norcvbuf += COUNTER_WRAP_16_BIT;
        if (Carry2.bits.tovr)
                etdev->Stats.max_pkt_error += COUNTER_WRAP_12_BIT;
        if (Carry2.bits.tund)
                etdev->Stats.tx_uflo += COUNTER_WRAP_12_BIT;
        if (Carry2.bits.tscl)
                etdev->Stats.first_collision += COUNTER_WRAP_12_BIT;
        if (Carry2.bits.tdfr)
                etdev->Stats.tx_deferred += COUNTER_WRAP_12_BIT;
        if (Carry2.bits.tmcl)
                etdev->Stats.excessive_collisions += COUNTER_WRAP_12_BIT;
        if (Carry2.bits.tlcl)
                etdev->Stats.late_collisions += COUNTER_WRAP_12_BIT;
        if (Carry2.bits.tncl)
                etdev->Stats.collisions += COUNTER_WRAP_12_BIT;
}

void SetupDeviceForMulticast(struct et131x_adapter *etdev)
{
        struct _RXMAC_t __iomem *rxmac = &etdev->regs->rxmac;
        uint32_t nIndex;
        uint32_t result;
        uint32_t hash1 = 0;
        uint32_t hash2 = 0;
        uint32_t hash3 = 0;
        uint32_t hash4 = 0;
        u32 pm_csr;

        /* If ET131X_PACKET_TYPE_MULTICAST is specified, then we provision
         * the multi-cast LIST.  If it is NOT specified, (and "ALL" is not
         * specified) then we should pass NO multi-cast addresses to the
         * driver.
         */
        if (etdev->PacketFilter & ET131X_PACKET_TYPE_MULTICAST) {
                /* Loop through our multicast array and set up the device */
                for (nIndex = 0; nIndex < etdev->MCAddressCount; nIndex++) {
                        result = ether_crc(6, etdev->MCList[nIndex]);

                        result = (result & 0x3F800000) >> 23;

                        if (result < 32) {
                                hash1 |= (1 << result);
                        } else if ((31 < result) && (result < 64)) {
                                result -= 32;
                                hash2 |= (1 << result);
                        } else if ((63 < result) && (result < 96)) {
                                result -= 64;
                                hash3 |= (1 << result);
                        } else {
                                result -= 96;
                                hash4 |= (1 << result);
                        }
                }
        }

        /* Write out the new hash to the device */
        pm_csr = readl(&etdev->regs->global.pm_csr);
        if ((pm_csr & ET_PM_PHY_SW_COMA) == 0) {
                writel(hash1, &rxmac->multi_hash1);
                writel(hash2, &rxmac->multi_hash2);
                writel(hash3, &rxmac->multi_hash3);
                writel(hash4, &rxmac->multi_hash4);
        }
}

void SetupDeviceForUnicast(struct et131x_adapter *etdev)
{
        struct _RXMAC_t __iomem *rxmac = &etdev->regs->rxmac;
        RXMAC_UNI_PF_ADDR1_t uni_pf1;
        RXMAC_UNI_PF_ADDR2_t uni_pf2;
        RXMAC_UNI_PF_ADDR3_t uni_pf3;
        u32 pm_csr;

        /* Set up unicast packet filter reg 3 to be the first two octets of
         * the MAC address for both address
         *
         * Set up unicast packet filter reg 2 to be the octets 2 - 5 of the
         * MAC address for second address
         *
         * Set up unicast packet filter reg 3 to be the octets 2 - 5 of the
         * MAC address for first address
         */
        uni_pf3.bits.addr1_1 = etdev->CurrentAddress[0];
        uni_pf3.bits.addr1_2 = etdev->CurrentAddress[1];
        uni_pf3.bits.addr2_1 = etdev->CurrentAddress[0];
        uni_pf3.bits.addr2_2 = etdev->CurrentAddress[1];

        uni_pf2.bits.addr2_3 = etdev->CurrentAddress[2];
        uni_pf2.bits.addr2_4 = etdev->CurrentAddress[3];
        uni_pf2.bits.addr2_5 = etdev->CurrentAddress[4];
        uni_pf2.bits.addr2_6 = etdev->CurrentAddress[5];

        uni_pf1.bits.addr1_3 = etdev->CurrentAddress[2];
        uni_pf1.bits.addr1_4 = etdev->CurrentAddress[3];
        uni_pf1.bits.addr1_5 = etdev->CurrentAddress[4];
        uni_pf1.bits.addr1_6 = etdev->CurrentAddress[5];

        pm_csr = readl(&etdev->regs->global.pm_csr);
        if ((pm_csr & ET_PM_PHY_SW_COMA) == 0) {
                writel(uni_pf1.value, &rxmac->uni_pf_addr1.value);
                writel(uni_pf2.value, &rxmac->uni_pf_addr2.value);
                writel(uni_pf3.value, &rxmac->uni_pf_addr3.value);
        }
}