Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus

[linux-btrfs-devel.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/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 "et131x_adapter.h"
#include "et131x.h"


#define COUNTER_WRAP_28_BIT 0x10000000
#define COUNTER_WRAP_22_BIT 0x400000
#define COUNTER_WRAP_16_BIT 0x10000
#define COUNTER_WRAP_12_BIT 0x1000

#define COUNTER_MASK_28_BIT (COUNTER_WRAP_28_BIT - 1)
#define COUNTER_MASK_22_BIT (COUNTER_WRAP_22_BIT - 1)
#define COUNTER_MASK_16_BIT (COUNTER_WRAP_16_BIT - 1)
#define COUNTER_MASK_12_BIT (COUNTER_WRAP_12_BIT - 1)

/**
 * ConfigMacRegs1 - Initialize the first part of MAC regs
 * @pAdpater: pointer to our adapter structure
 */
void ConfigMACRegs1(struct et131x_adapter *etdev)
{
        struct mac_regs __iomem *pMac = &etdev->regs->mac;
        u32 station1;
        u32 station2;
        u32 ipg;

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

        /* Next lets configure the MAC Inter-packet gap register */
        ipg = 0x38005860;               /* IPG1 0x38 IPG2 0x58 B2B 0x60 */
        ipg |= 0x50 << 8;               /* ifg enforce 0x50 */
        writel(ipg, &pMac->ipg);

        /* Next lets configure the MAC Half Duplex register */
        /* BEB trunc 0xA, Ex Defer, Rexmit 0xF Coll 0x37 */
        writel(0x00A1F037, &pMac->hfdp);

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

        /* Let's move on to setting up the mii management configuration */
        writel(0x07, &pMac->mii_mgmt_cfg);      /* Clock reset 0x7 */

        /* 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 = (etdev->addr[1] << ET_MAC_STATION_ADDR2_OC2_SHIFT) |
                   (etdev->addr[0] << ET_MAC_STATION_ADDR2_OC1_SHIFT);
        station1 = (etdev->addr[5] << ET_MAC_STATION_ADDR1_OC6_SHIFT) |
                   (etdev->addr[4] << ET_MAC_STATION_ADDR1_OC5_SHIFT) |
                   (etdev->addr[3] << ET_MAC_STATION_ADDR1_OC4_SHIFT) |
                    etdev->addr[2];
        writel(station1, &pMac->station_addr_1);
        writel(station2, &pMac->station_addr_2);

        /* 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);

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

/**
 * 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_regs __iomem *pMac = &etdev->regs->mac;
        u32 cfg1;
        u32 cfg2;
        u32 ifctrl;
        u32 ctl;

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

        /* Set up the if mode bits */
        cfg2 &= ~0x300;
        if (etdev->linkspeed == TRUEPHY_SPEED_1000MBPS) {
                cfg2 |= 0x200;
                /* Phy mode bit */
                ifctrl &= ~(1 << 24);
        } else {
                cfg2 |= 0x100;
                ifctrl |= (1 << 24);
        }

        /* We need to enable Rx/Tx */
        cfg1 |= CFG1_RX_ENABLE|CFG1_TX_ENABLE|CFG1_TX_FLOW;
        /* Initialize loop back to off */
        cfg1 &= ~(CFG1_LOOPBACK|CFG1_RX_FLOW);
        if (etdev->flowcontrol == FLOW_RXONLY || etdev->flowcontrol == FLOW_BOTH)
                cfg1 |= CFG1_RX_FLOW;
        writel(cfg1, &pMac->cfg1);

        /* Now we need to initialize the MAC Configuration 2 register */
        /* preamble 7, check length, huge frame off, pad crc, crc enable
           full duplex off */
        cfg2 |= 0x7016;
        cfg2 &= ~0x0021;

        /* Turn on duplex if needed */
        if (etdev->duplex_mode)
                cfg2 |= 0x01;

        ifctrl &= ~(1 << 26);
        if (!etdev->duplex_mode)
                ifctrl |= (1<<26);      /* Enable ghd */

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

        do {
                udelay(10);
                delay++;
                cfg1 = readl(&pMac->cfg1);
        } while ((cfg1 & CFG1_WAIT) != CFG1_WAIT && delay < 100);

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

        /* Enable TXMAC */
        ctl |= 0x09;    /* TX mac enable, FC disable */
        writel(ctl, &etdev->regs->txmac.ctl);

        /* 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_regs __iomem *pRxMac = &etdev->regs->rxmac;
        u32 sa_lo;
        u32 sa_hi = 0;
        u32 pf_ctrl = 0;

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

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

        /* 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 = (etdev->addr[2] << ET_WOL_LO_SA3_SHIFT) |
                (etdev->addr[3] << ET_WOL_LO_SA4_SHIFT) |
                (etdev->addr[4] << ET_WOL_LO_SA5_SHIFT) |
                 etdev->addr[5];
        writel(sa_lo, &pRxMac->sa_lo);

        sa_hi = (u32) (etdev->addr[0] << ET_WOL_HI_SA1_SHIFT) |
                       etdev->addr[1];
        writel(sa_hi, &pRxMac->sa_hi);

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

        /* Let's initialize the Unicast Packet filtering address */
        if (etdev->PacketFilter & ET131X_PACKET_TYPE_DIRECTED) {
                SetupDeviceForUnicast(etdev);
                pf_ctrl |= 4;   /* Unicast filter */
        } else {
                writel(0, &pRxMac->uni_pf_addr1);
                writel(0, &pRxMac->uni_pf_addr2);
                writel(0, &pRxMac->uni_pf_addr3);
        }

        /* Let's initialize the Multicast hash */
        if (!(etdev->PacketFilter & ET131X_PACKET_TYPE_ALL_MULTICAST)) {
                pf_ctrl |= 2;   /* Multicast filter */
                SetupDeviceForMulticast(etdev);
        }

        /* Runt packet filtering.  Didn't work in version A silicon. */
        pf_ctrl |= (NIC_MIN_PACKET_SIZE + 4) << 16;
        pf_ctrl |= 8;   /* Fragment filter */

        if (etdev->RegistryJumboPacket > 8192)
                /* 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.
                 *
                 * seg_en on, fc_en off, size 0x10
                 */
                writel(0x41, &pRxMac->mcif_ctrl_max_seg);
        else
                writel(0, &pRxMac->mcif_ctrl_max_seg);

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

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

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

        /* 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);
        else
                writel(0x30030, &pRxMac->mif_ctrl);

        /* 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, &pRxMac->pf_ctrl);
        writel(0x9, &pRxMac->ctrl);
}

void ConfigTxMacRegs(struct et131x_adapter *etdev)
{
        struct txmac_regs *txmac = &etdev->regs->txmac;

        /* 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 == FLOW_NONE)
                writel(0, &txmac->cf_param);
        else
                writel(0x40, &txmac->cf_param);
}

void ConfigMacStatRegs(struct et131x_adapter *etdev)
{
        struct macstat_regs __iomem *macstat =
                &etdev->regs->macstat;

        /* Next we need to initialize all the macstat registers to zero on
         * the device.
         */
        writel(0, &macstat->txrx_0_64_byte_frames);
        writel(0, &macstat->txrx_65_127_byte_frames);
        writel(0, &macstat->txrx_128_255_byte_frames);
        writel(0, &macstat->txrx_256_511_byte_frames);
        writel(0, &macstat->txrx_512_1023_byte_frames);
        writel(0, &macstat->txrx_1024_1518_byte_frames);
        writel(0, &macstat->txrx_1519_1522_gvln_frames);

        writel(0, &macstat->rx_bytes);
        writel(0, &macstat->rx_packets);
        writel(0, &macstat->rx_fcs_errs);
        writel(0, &macstat->rx_multicast_packets);
        writel(0, &macstat->rx_broadcast_packets);
        writel(0, &macstat->rx_control_frames);
        writel(0, &macstat->rx_pause_frames);
        writel(0, &macstat->rx_unknown_opcodes);
        writel(0, &macstat->rx_align_errs);
        writel(0, &macstat->rx_frame_len_errs);
        writel(0, &macstat->rx_code_errs);
        writel(0, &macstat->rx_carrier_sense_errs);
        writel(0, &macstat->rx_undersize_packets);
        writel(0, &macstat->rx_oversize_packets);
        writel(0, &macstat->rx_fragment_packets);
        writel(0, &macstat->rx_jabbers);
        writel(0, &macstat->rx_drops);

        writel(0, &macstat->tx_bytes);
        writel(0, &macstat->tx_packets);
        writel(0, &macstat->tx_multicast_packets);
        writel(0, &macstat->tx_broadcast_packets);
        writel(0, &macstat->tx_pause_frames);
        writel(0, &macstat->tx_deferred);
        writel(0, &macstat->tx_excessive_deferred);
        writel(0, &macstat->tx_single_collisions);
        writel(0, &macstat->tx_multiple_collisions);
        writel(0, &macstat->tx_late_collisions);
        writel(0, &macstat->tx_excessive_collisions);
        writel(0, &macstat->tx_total_collisions);
        writel(0, &macstat->tx_pause_honored_frames);
        writel(0, &macstat->tx_drops);
        writel(0, &macstat->tx_jabbers);
        writel(0, &macstat->tx_fcs_errs);
        writel(0, &macstat->tx_control_frames);
        writel(0, &macstat->tx_oversize_frames);
        writel(0, &macstat->tx_undersize_frames);
        writel(0, &macstat->tx_fragments);
        writel(0, &macstat->carry_reg1);
        writel(0, &macstat->carry_reg2);

        /* 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.
         */
        writel(0xFFFFBE32, &macstat->carry_reg1_mask);
        writel(0xFFFE7E8B, &macstat->carry_reg2_mask);
}

void ConfigFlowControl(struct et131x_adapter *etdev)
{
        if (etdev->duplex_mode == 0) {
                etdev->flowcontrol = FLOW_NONE;
        } else {
                char remote_pause, remote_async_pause;

                ET1310_PhyAccessMiBit(etdev,
                                      TRUEPHY_BIT_READ, 5, 10, &remote_pause);
                ET1310_PhyAccessMiBit(etdev,
                                      TRUEPHY_BIT_READ, 5, 11,
                                      &remote_async_pause);

                if ((remote_pause == TRUEPHY_BIT_SET) &&
                    (remote_async_pause == TRUEPHY_BIT_SET)) {
                        etdev->flowcontrol = etdev->wanted_flow;
                } else if ((remote_pause == TRUEPHY_BIT_SET) &&
                           (remote_async_pause == TRUEPHY_BIT_CLEAR)) {
                        if (etdev->wanted_flow == FLOW_BOTH)
                                etdev->flowcontrol = FLOW_BOTH;
                        else
                                etdev->flowcontrol = FLOW_NONE;
                } else if ((remote_pause == TRUEPHY_BIT_CLEAR) &&
                           (remote_async_pause == TRUEPHY_BIT_CLEAR)) {
                        etdev->flowcontrol = FLOW_NONE;
                } else {/* if (remote_pause == TRUEPHY_CLEAR_BIT &&
                               remote_async_pause == TRUEPHY_SET_BIT) */
                        if (etdev->wanted_flow == FLOW_BOTH)
                                etdev->flowcontrol = FLOW_RXONLY;
                        else
                                etdev->flowcontrol = FLOW_NONE;
                }
        }
}

/**
 * UpdateMacStatHostCounters - Update the local copy of the statistics
 * @etdev: pointer to the adapter structure
 */
void UpdateMacStatHostCounters(struct et131x_adapter *etdev)
{
        struct ce_stats *stats = &etdev->stats;
        struct macstat_regs __iomem *macstat =
                &etdev->regs->macstat;

        stats->collisions += readl(&macstat->tx_total_collisions);
        stats->first_collision += readl(&macstat->tx_single_collisions);
        stats->tx_deferred += readl(&macstat->tx_deferred);
        stats->excessive_collisions += readl(&macstat->tx_multiple_collisions);
        stats->late_collisions += readl(&macstat->tx_late_collisions);
        stats->tx_uflo += readl(&macstat->tx_undersize_frames);
        stats->max_pkt_error += readl(&macstat->tx_oversize_frames);

        stats->alignment_err += readl(&macstat->rx_align_errs);
        stats->crc_err += readl(&macstat->rx_code_errs);
        stats->norcvbuf += readl(&macstat->rx_drops);
        stats->rx_ov_flow += readl(&macstat->rx_oversize_packets);
        stats->code_violations += readl(&macstat->rx_fcs_errs);
        stats->length_err += readl(&macstat->rx_frame_len_errs);

        stats->other_errors += readl(&macstat->rx_fragment_packets);
}

/**
 * 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)
{
        u32 carry_reg1;
        u32 carry_reg2;

        /* Read the interrupt bits from the register(s).  These are Clear On
         * Write.
         */
        carry_reg1 = readl(&etdev->regs->macstat.carry_reg1);
        carry_reg2 = readl(&etdev->regs->macstat.carry_reg2);

        writel(carry_reg2, &etdev->regs->macstat.carry_reg1);
        writel(carry_reg2, &etdev->regs->macstat.carry_reg2);

        /* 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 (carry_reg1 & (1 << 14))
                etdev->stats.code_violations += COUNTER_WRAP_16_BIT;
        if (carry_reg1 & (1 << 8))
                etdev->stats.alignment_err += COUNTER_WRAP_12_BIT;
        if (carry_reg1 & (1 << 7))
                etdev->stats.length_err += COUNTER_WRAP_16_BIT;
        if (carry_reg1 & (1 << 2))
                etdev->stats.other_errors += COUNTER_WRAP_16_BIT;
        if (carry_reg1 & (1 << 6))
                etdev->stats.crc_err += COUNTER_WRAP_16_BIT;
        if (carry_reg1 & (1 << 3))
                etdev->stats.rx_ov_flow += COUNTER_WRAP_16_BIT;
        if (carry_reg1 & (1 << 0))
                etdev->stats.norcvbuf += COUNTER_WRAP_16_BIT;
        if (carry_reg2 & (1 << 16))
                etdev->stats.max_pkt_error += COUNTER_WRAP_12_BIT;
        if (carry_reg2 & (1 << 15))
                etdev->stats.tx_uflo += COUNTER_WRAP_12_BIT;
        if (carry_reg2 & (1 << 6))
                etdev->stats.first_collision += COUNTER_WRAP_12_BIT;
        if (carry_reg2 & (1 << 8))
                etdev->stats.tx_deferred += COUNTER_WRAP_12_BIT;
        if (carry_reg2 & (1 << 5))
                etdev->stats.excessive_collisions += COUNTER_WRAP_12_BIT;
        if (carry_reg2 & (1 << 4))
                etdev->stats.late_collisions += COUNTER_WRAP_12_BIT;
        if (carry_reg2 & (1 << 2))
                etdev->stats.collisions += COUNTER_WRAP_12_BIT;
}

void SetupDeviceForMulticast(struct et131x_adapter *etdev)
{
        struct rxmac_regs __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_regs __iomem *rxmac = &etdev->regs->rxmac;
        u32 uni_pf1;
        u32 uni_pf2;
        u32 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 = (etdev->addr[0] << ET_UNI_PF_ADDR2_1_SHIFT) |
                  (etdev->addr[1] << ET_UNI_PF_ADDR2_2_SHIFT) |
                  (etdev->addr[0] << ET_UNI_PF_ADDR1_1_SHIFT) |
                   etdev->addr[1];

        uni_pf2 = (etdev->addr[2] << ET_UNI_PF_ADDR2_3_SHIFT) |
                  (etdev->addr[3] << ET_UNI_PF_ADDR2_4_SHIFT) |
                  (etdev->addr[4] << ET_UNI_PF_ADDR2_5_SHIFT) |
                   etdev->addr[5];

        uni_pf1 = (etdev->addr[2] << ET_UNI_PF_ADDR1_3_SHIFT) |
                  (etdev->addr[3] << ET_UNI_PF_ADDR1_4_SHIFT) |
                  (etdev->addr[4] << ET_UNI_PF_ADDR1_5_SHIFT) |
                   etdev->addr[5];

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