etherfabric.c

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/**************************************************************************
 *
 * Etherboot driver for Level 5 Etherfabric network cards
 *
 * Written by Michael Brown <mbrown@fensystems.co.uk>
 *
 * Copyright Fen Systems Ltd. 2005
 * Copyright Level 5 Networks Inc. 2005
 *
 * This software may be used and distributed according to the terms of
 * the GNU General Public License (GPL), incorporated herein by
 * reference.  Drivers based on or derived from this code fall under
 * the GPL and must retain the authorship, copyright and license
 * notice.
 *
 **************************************************************************
 */

FILE_LICENCE ( GPL_ANY );

#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <byteswap.h>
#include <console.h>
#include <gpxe/io.h>
#include <gpxe/pci.h>
#include <gpxe/malloc.h>
#include <gpxe/ethernet.h>
#include <gpxe/iobuf.h>
#include <gpxe/netdevice.h>
#include <gpxe/timer.h>
#include <mii.h>
#include "etherfabric.h"
#include "etherfabric_nic.h"

/**************************************************************************
 *
 * Constants and macros
 *
 **************************************************************************
 */

#define EFAB_REGDUMP(...)
#define EFAB_TRACE(...) DBGP(__VA_ARGS__)

// printf() is not allowed within drivers.  Use DBG() instead.
#define EFAB_LOG(...) DBG(__VA_ARGS__)
#define EFAB_ERR(...) DBG(__VA_ARGS__)

#define FALCON_USE_IO_BAR 0

#define HZ 100
#define EFAB_BYTE 1

/**************************************************************************
 *
 * Hardware data structures and sizing
 *
 **************************************************************************
 */
extern int __invalid_queue_size;
#define FQS(_prefix, _x)                                        \
        ( ( (_x) == 512 ) ? _prefix ## _SIZE_512 :              \
          ( ( (_x) == 1024 ) ? _prefix ## _SIZE_1K :            \
            ( ( (_x) == 2048 ) ? _prefix ## _SIZE_2K :          \
              ( ( (_x) == 4096) ? _prefix ## _SIZE_4K :         \
                __invalid_queue_size ) ) ) )


#define EFAB_MAX_FRAME_LEN(mtu)                         \
        ( ( ( ( mtu ) + 4/* FCS */ ) + 7 ) & ~7 )

/**************************************************************************
 *
 * GMII routines
 *
 **************************************************************************
 */

static void falcon_mdio_write (struct efab_nic *efab, int device,
                               int location, int value );
static int falcon_mdio_read ( struct efab_nic *efab, int device, int location );

/* GMII registers */
#define GMII_PSSR               0x11    /* PHY-specific status register */

/* Pseudo extensions to the link partner ability register */
#define LPA_EF_1000FULL         0x00020000
#define LPA_EF_1000HALF         0x00010000
#define LPA_EF_10000FULL                0x00040000
#define LPA_EF_10000HALF                0x00080000

#define LPA_100                 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
#define LPA_EF_1000             ( LPA_EF_1000FULL | LPA_EF_1000HALF )
#define LPA_EF_10000               ( LPA_EF_10000FULL | LPA_EF_10000HALF )
#define LPA_EF_DUPLEX           ( LPA_10FULL | LPA_100FULL | LPA_EF_1000FULL | \
                                  LPA_EF_10000FULL )

/* Mask of bits not associated with speed or duplexity. */
#define LPA_OTHER               ~( LPA_10FULL | LPA_10HALF | LPA_100FULL | \
                                   LPA_100HALF | LPA_EF_1000FULL | LPA_EF_1000HALF )

/* PHY-specific status register */
#define PSSR_LSTATUS            0x0400  /* Bit 10 - link status */

/**
 * Retrieve GMII autonegotiation advertised abilities
 *
 */
static unsigned int
gmii_autoneg_advertised ( struct efab_nic *efab )
{
        unsigned int mii_advertise;
        unsigned int gmii_advertise;

        /* Extended bits are in bits 8 and 9 of MII_CTRL1000 */
        mii_advertise = falcon_mdio_read ( efab, 0, MII_ADVERTISE );
        gmii_advertise = ( ( falcon_mdio_read ( efab, 0, MII_CTRL1000 ) >> 8 )
                           & 0x03 );
        return ( ( gmii_advertise << 16 ) | mii_advertise );
}

/**
 * Retrieve GMII autonegotiation link partner abilities
 *
 */
static unsigned int
gmii_autoneg_lpa ( struct efab_nic *efab )
{
        unsigned int mii_lpa;
        unsigned int gmii_lpa;

        /* Extended bits are in bits 10 and 11 of MII_STAT1000 */
        mii_lpa = falcon_mdio_read ( efab, 0, MII_LPA );
        gmii_lpa = ( falcon_mdio_read ( efab, 0, MII_STAT1000 ) >> 10 ) & 0x03;
        return ( ( gmii_lpa << 16 ) | mii_lpa );
}

/**
 * Calculate GMII autonegotiated link technology
 *
 */
static unsigned int
gmii_nway_result ( unsigned int negotiated )
{
        unsigned int other_bits;

        /* Mask out the speed and duplexity bits */
        other_bits = negotiated & LPA_OTHER;

        if ( negotiated & LPA_EF_1000FULL )
                return ( other_bits | LPA_EF_1000FULL );
        else if ( negotiated & LPA_EF_1000HALF )
                return ( other_bits | LPA_EF_1000HALF );
        else if ( negotiated & LPA_100FULL )
                return ( other_bits | LPA_100FULL );
        else if ( negotiated & LPA_100BASE4 )
                return ( other_bits | LPA_100BASE4 );
        else if ( negotiated & LPA_100HALF )
                return ( other_bits | LPA_100HALF );
        else if ( negotiated & LPA_10FULL )
                return ( other_bits | LPA_10FULL );
        else return ( other_bits | LPA_10HALF );
}

/**
 * Check GMII PHY link status
 *
 */
static int
gmii_link_ok ( struct efab_nic *efab )
{
        int status;
        int phy_status;

        /* BMSR is latching - it returns "link down" if the link has
         * been down at any point since the last read.  To get a
         * real-time status, we therefore read the register twice and
         * use the result of the second read.
         */
        (void) falcon_mdio_read ( efab, 0, MII_BMSR );
        status = falcon_mdio_read ( efab, 0, MII_BMSR );

        /* Read the PHY-specific Status Register.  This is
         * non-latching, so we need do only a single read.
         */
        phy_status = falcon_mdio_read ( efab, 0, GMII_PSSR );

        return ( ( status & BMSR_LSTATUS ) && ( phy_status & PSSR_LSTATUS ) );
}

/**************************************************************************
 *
 * MDIO routines
 *
 **************************************************************************
 */

/* Numbering of the MDIO Manageable Devices (MMDs) */
/* Physical Medium Attachment/ Physical Medium Dependent sublayer */
#define MDIO_MMD_PMAPMD (1)
/* WAN Interface Sublayer */
#define MDIO_MMD_WIS    (2)
/* Physical Coding Sublayer */
#define MDIO_MMD_PCS    (3)
/* PHY Extender Sublayer */
#define MDIO_MMD_PHYXS  (4)
/* Extender Sublayer */
#define MDIO_MMD_DTEXS  (5)
/* Transmission convergence */
#define MDIO_MMD_TC     (6)
/* Auto negotiation */
#define MDIO_MMD_AN     (7)

/* Generic register locations */
#define MDIO_MMDREG_CTRL1       (0)
#define MDIO_MMDREG_STAT1       (1)
#define MDIO_MMDREG_DEVS0       (5)
#define MDIO_MMDREG_STAT2       (8)

/* Bits in MMDREG_CTRL1 */
/* Reset */
#define MDIO_MMDREG_CTRL1_RESET_LBN     (15)
#define MDIO_MMDREG_CTRL1_RESET_WIDTH   (1)

/* Bits in MMDREG_STAT1 */
#define MDIO_MMDREG_STAT1_FAULT_LBN     (7)
#define MDIO_MMDREG_STAT1_FAULT_WIDTH   (1)

/* Link state */
#define MDIO_MMDREG_STAT1_LINK_LBN      (2)
#define MDIO_MMDREG_STAT1_LINK_WIDTH    (1)

/* Bits in MMDREG_DEVS0. */
#define DEV_PRESENT_BIT(_b) (1 << _b)

#define MDIO_MMDREG_DEVS0_DTEXS  DEV_PRESENT_BIT(MDIO_MMD_DTEXS)
#define MDIO_MMDREG_DEVS0_PHYXS  DEV_PRESENT_BIT(MDIO_MMD_PHYXS)
#define MDIO_MMDREG_DEVS0_PCS    DEV_PRESENT_BIT(MDIO_MMD_PCS)
#define MDIO_MMDREG_DEVS0_WIS    DEV_PRESENT_BIT(MDIO_MMD_WIS)
#define MDIO_MMDREG_DEVS0_PMAPMD DEV_PRESENT_BIT(MDIO_MMD_PMAPMD)

#define MDIO_MMDREG_DEVS0_AN     DEV_PRESENT_BIT(MDIO_MMD_AN)

/* Bits in MMDREG_STAT2 */
#define MDIO_MMDREG_STAT2_PRESENT_VAL   (2)
#define MDIO_MMDREG_STAT2_PRESENT_LBN   (14)
#define MDIO_MMDREG_STAT2_PRESENT_WIDTH (2)

/* PHY XGXS lane state */
#define MDIO_PHYXS_LANE_STATE           (0x18) 
#define MDIO_PHYXS_LANE_ALIGNED_LBN     (12)
#define MDIO_PHYXS_LANE_SYNC0_LBN       (0)
#define MDIO_PHYXS_LANE_SYNC1_LBN       (1)
#define MDIO_PHYXS_LANE_SYNC2_LBN       (2)
#define MDIO_PHYXS_LANE_SYNC3_LBN       (3)

/* This ought to be ridiculous overkill. We expect it to fail rarely */
#define MDIO45_RESET_TRIES      100
#define MDIO45_RESET_SPINTIME   10

static int
mdio_clause45_wait_reset_mmds ( struct efab_nic* efab )
{
        int tries = MDIO45_RESET_TRIES;
        int in_reset;

        while(tries) {
                int mask = efab->phy_op->mmds;
                int mmd = 0;
                in_reset = 0;
                while(mask) {
                        if (mask & 1) {
                                int stat = falcon_mdio_read ( efab,  mmd,
                                                              MDIO_MMDREG_CTRL1 );
                                if (stat < 0) {
                                        EFAB_ERR("Failed to read status of MMD %d\n",
                                                 mmd );
                                        in_reset = 1;
                                        break;
                                }
                                if (stat & (1 << MDIO_MMDREG_CTRL1_RESET_LBN))
                                        in_reset |= (1 << mmd);
                        }
                        mask = mask >> 1;
                        mmd++;
                }
                if (!in_reset)
                        break;
                tries--;
                mdelay ( MDIO45_RESET_SPINTIME );
        }
        if (in_reset != 0) {
                EFAB_ERR("Not all MMDs came out of reset in time. MMDs "
                         "still in reset: %x\n", in_reset);
                return -ETIMEDOUT;
        }
        return 0;
}

static int
mdio_clause45_reset_mmd ( struct efab_nic *efab, int mmd )
{
        int tries = MDIO45_RESET_TRIES;
        int ctrl;

        falcon_mdio_write ( efab, mmd, MDIO_MMDREG_CTRL1,
                            ( 1 << MDIO_MMDREG_CTRL1_RESET_LBN ) );

        /* Wait for the reset bit to clear. */
        do {
                mdelay ( MDIO45_RESET_SPINTIME );

                ctrl = falcon_mdio_read ( efab, mmd, MDIO_MMDREG_CTRL1 );
                if ( ~ctrl & ( 1 << MDIO_MMDREG_CTRL1_RESET_LBN ) )
                        return 0;
        } while ( --tries );

        EFAB_ERR ( "Failed to reset mmd %d\n", mmd );

        return -ETIMEDOUT;
}

static int
mdio_clause45_links_ok(struct efab_nic *efab )
{
        int status, good;
        int ok = 1;
        int mmd = 0;
        int mmd_mask = efab->phy_op->mmds;

        while (mmd_mask) {
                if (mmd_mask & 1) {
                        /* Double reads because link state is latched, and a
                         * read moves the current state into the register */
                        status = falcon_mdio_read ( efab, mmd,
                                                    MDIO_MMDREG_STAT1 );
                        status = falcon_mdio_read ( efab, mmd,
                                                    MDIO_MMDREG_STAT1 );

                        good = status & (1 << MDIO_MMDREG_STAT1_LINK_LBN);
                        ok = ok && good;
                }
                mmd_mask = (mmd_mask >> 1);
                mmd++;
        }
        return ok;
}

static int
mdio_clause45_check_mmds ( struct efab_nic *efab )
{
        int mmd = 0;
        int devices = falcon_mdio_read ( efab, MDIO_MMD_PHYXS,
                                         MDIO_MMDREG_DEVS0 );
        int mmd_mask = efab->phy_op->mmds;

        /* Check all the expected MMDs are present */
        if ( devices < 0 ) {
                EFAB_ERR ( "Failed to read devices present\n" );
                return -EIO;
        }
        if ( ( devices & mmd_mask ) != mmd_mask ) {
                EFAB_ERR ( "required MMDs not present: got %x, wanted %x\n",
                           devices, mmd_mask );
                return -EIO;
        }

        /* Check all required MMDs are responding and happy. */
        while ( mmd_mask ) {
                if ( mmd_mask & 1 ) {
                        efab_dword_t reg;
                        int status;
                        reg.opaque = falcon_mdio_read ( efab, mmd,
                                                        MDIO_MMDREG_STAT2 );
                        status = EFAB_DWORD_FIELD ( reg,
                                                    MDIO_MMDREG_STAT2_PRESENT );
                        if ( status != MDIO_MMDREG_STAT2_PRESENT_VAL ) {


                                return -EIO;
                        }
                }
                mmd_mask >>= 1;
                mmd++;
        }

        return 0;
}

/* I/O BAR address register */
#define FCN_IOM_IND_ADR_REG 0x0

/* I/O BAR data register */
#define FCN_IOM_IND_DAT_REG 0x4

/* Address region register */
#define FCN_ADR_REGION_REG_KER  0x00
#define FCN_ADR_REGION0_LBN     0
#define FCN_ADR_REGION0_WIDTH   18
#define FCN_ADR_REGION1_LBN     32
#define FCN_ADR_REGION1_WIDTH   18
#define FCN_ADR_REGION2_LBN     64
#define FCN_ADR_REGION2_WIDTH   18
#define FCN_ADR_REGION3_LBN     96
#define FCN_ADR_REGION3_WIDTH   18

/* Interrupt enable register */
#define FCN_INT_EN_REG_KER 0x0010
#define FCN_MEM_PERR_INT_EN_KER_LBN 5
#define FCN_MEM_PERR_INT_EN_KER_WIDTH 1
#define FCN_KER_INT_CHAR_LBN 4
#define FCN_KER_INT_CHAR_WIDTH 1
#define FCN_KER_INT_KER_LBN 3
#define FCN_KER_INT_KER_WIDTH 1
#define FCN_ILL_ADR_ERR_INT_EN_KER_LBN 2
#define FCN_ILL_ADR_ERR_INT_EN_KER_WIDTH 1
#define FCN_SRM_PERR_INT_EN_KER_LBN 1
#define FCN_SRM_PERR_INT_EN_KER_WIDTH 1
#define FCN_DRV_INT_EN_KER_LBN 0
#define FCN_DRV_INT_EN_KER_WIDTH 1

/* Interrupt status register */
#define FCN_INT_ADR_REG_KER     0x0030
#define FCN_INT_ADR_KER_LBN 0
#define FCN_INT_ADR_KER_WIDTH EFAB_DMA_TYPE_WIDTH ( 64 )

/* Interrupt status register (B0 only) */
#define INT_ISR0_B0 0x90
#define INT_ISR1_B0 0xA0

/* Interrupt acknowledge register (A0/A1 only) */
#define FCN_INT_ACK_KER_REG_A1 0x0050
#define INT_ACK_DUMMY_DATA_LBN 0
#define INT_ACK_DUMMY_DATA_WIDTH 32

/* Interrupt acknowledge work-around register (A0/A1 only )*/
#define WORK_AROUND_BROKEN_PCI_READS_REG_KER_A1 0x0070

/* Hardware initialisation register */
#define FCN_HW_INIT_REG_KER 0x00c0
#define FCN_BCSR_TARGET_MASK_LBN 101
#define FCN_BCSR_TARGET_MASK_WIDTH 4

/* SPI host command register */
#define FCN_EE_SPI_HCMD_REG 0x0100
#define FCN_EE_SPI_HCMD_CMD_EN_LBN 31
#define FCN_EE_SPI_HCMD_CMD_EN_WIDTH 1
#define FCN_EE_WR_TIMER_ACTIVE_LBN 28
#define FCN_EE_WR_TIMER_ACTIVE_WIDTH 1
#define FCN_EE_SPI_HCMD_SF_SEL_LBN 24
#define FCN_EE_SPI_HCMD_SF_SEL_WIDTH 1
#define FCN_EE_SPI_EEPROM 0
#define FCN_EE_SPI_FLASH 1
#define FCN_EE_SPI_HCMD_DABCNT_LBN 16
#define FCN_EE_SPI_HCMD_DABCNT_WIDTH 5
#define FCN_EE_SPI_HCMD_READ_LBN 15
#define FCN_EE_SPI_HCMD_READ_WIDTH 1
#define FCN_EE_SPI_READ 1
#define FCN_EE_SPI_WRITE 0
#define FCN_EE_SPI_HCMD_DUBCNT_LBN 12
#define FCN_EE_SPI_HCMD_DUBCNT_WIDTH 2
#define FCN_EE_SPI_HCMD_ADBCNT_LBN 8
#define FCN_EE_SPI_HCMD_ADBCNT_WIDTH 2
#define FCN_EE_SPI_HCMD_ENC_LBN 0
#define FCN_EE_SPI_HCMD_ENC_WIDTH 8

/* SPI host address register */
#define FCN_EE_SPI_HADR_REG 0x0110
#define FCN_EE_SPI_HADR_DUBYTE_LBN 24
#define FCN_EE_SPI_HADR_DUBYTE_WIDTH 8
#define FCN_EE_SPI_HADR_ADR_LBN 0
#define FCN_EE_SPI_HADR_ADR_WIDTH 24

/* SPI host data register */
#define FCN_EE_SPI_HDATA_REG 0x0120
#define FCN_EE_SPI_HDATA3_LBN 96
#define FCN_EE_SPI_HDATA3_WIDTH 32
#define FCN_EE_SPI_HDATA2_LBN 64
#define FCN_EE_SPI_HDATA2_WIDTH 32
#define FCN_EE_SPI_HDATA1_LBN 32
#define FCN_EE_SPI_HDATA1_WIDTH 32
#define FCN_EE_SPI_HDATA0_LBN 0
#define FCN_EE_SPI_HDATA0_WIDTH 32

/* VPD Config 0 Register register */
#define FCN_EE_VPD_CFG_REG 0x0140
#define FCN_EE_VPD_EN_LBN 0
#define FCN_EE_VPD_EN_WIDTH 1
#define FCN_EE_VPD_EN_AD9_MODE_LBN 1
#define FCN_EE_VPD_EN_AD9_MODE_WIDTH 1
#define FCN_EE_EE_CLOCK_DIV_LBN 112
#define FCN_EE_EE_CLOCK_DIV_WIDTH 7
#define FCN_EE_SF_CLOCK_DIV_LBN 120
#define FCN_EE_SF_CLOCK_DIV_WIDTH 7


/* NIC status register */
#define FCN_NIC_STAT_REG 0x0200
#define FCN_ONCHIP_SRAM_LBN 16
#define FCN_ONCHIP_SRAM_WIDTH 1
#define FCN_SF_PRST_LBN 9
#define FCN_SF_PRST_WIDTH 1
#define FCN_EE_PRST_LBN 8
#define FCN_EE_PRST_WIDTH 1
#define FCN_EE_STRAP_LBN 7
#define FCN_EE_STRAP_WIDTH 1
#define FCN_PCI_PCIX_MODE_LBN 4
#define FCN_PCI_PCIX_MODE_WIDTH 3
#define FCN_PCI_PCIX_MODE_PCI33_DECODE 0
#define FCN_PCI_PCIX_MODE_PCI66_DECODE 1
#define FCN_PCI_PCIX_MODE_PCIX66_DECODE 5
#define FCN_PCI_PCIX_MODE_PCIX100_DECODE 6
#define FCN_PCI_PCIX_MODE_PCIX133_DECODE 7
#define FCN_STRAP_ISCSI_EN_LBN 3
#define FCN_STRAP_ISCSI_EN_WIDTH 1
#define FCN_STRAP_PINS_LBN 0
#define FCN_STRAP_PINS_WIDTH 3
#define FCN_STRAP_10G_LBN 2
#define FCN_STRAP_10G_WIDTH 1
#define FCN_STRAP_DUAL_PORT_LBN 1
#define FCN_STRAP_DUAL_PORT_WIDTH 1
#define FCN_STRAP_PCIE_LBN 0
#define FCN_STRAP_PCIE_WIDTH 1

/* Falcon revisions */
#define FALCON_REV_A0 0
#define FALCON_REV_A1 1
#define FALCON_REV_B0 2

/* GPIO control register */
#define FCN_GPIO_CTL_REG_KER 0x0210
#define FCN_GPIO_CTL_REG_KER 0x0210

#define FCN_GPIO3_OEN_LBN 27
#define FCN_GPIO3_OEN_WIDTH 1
#define FCN_GPIO2_OEN_LBN 26
#define FCN_GPIO2_OEN_WIDTH 1
#define FCN_GPIO1_OEN_LBN 25
#define FCN_GPIO1_OEN_WIDTH 1
#define FCN_GPIO0_OEN_LBN 24
#define FCN_GPIO0_OEN_WIDTH 1

#define FCN_GPIO3_OUT_LBN 19
#define FCN_GPIO3_OUT_WIDTH 1
#define FCN_GPIO2_OUT_LBN 18
#define FCN_GPIO2_OUT_WIDTH 1
#define FCN_GPIO1_OUT_LBN 17
#define FCN_GPIO1_OUT_WIDTH 1
#define FCN_GPIO0_OUT_LBN 16
#define FCN_GPIO0_OUT_WIDTH 1

#define FCN_GPIO3_IN_LBN 11
#define FCN_GPIO3_IN_WIDTH 1
#define FCN_GPIO2_IN_LBN 10
#define FCN_GPIO2_IN_WIDTH 1
#define FCN_GPIO1_IN_LBN 9
#define FCN_GPIO1_IN_WIDTH 1
#define FCN_GPIO0_IN_LBN 8
#define FCN_GPIO0_IN_WIDTH 1

#define FCN_FLASH_PRESENT_LBN 7
#define FCN_FLASH_PRESENT_WIDTH 1
#define FCN_EEPROM_PRESENT_LBN 6
#define FCN_EEPROM_PRESENT_WIDTH 1
#define FCN_BOOTED_USING_NVDEVICE_LBN 3
#define FCN_BOOTED_USING_NVDEVICE_WIDTH 1

/* Defines for extra non-volatile storage */
#define FCN_NV_MAGIC_NUMBER 0xFA1C

/* Global control register */
#define FCN_GLB_CTL_REG_KER     0x0220
#define FCN_EXT_PHY_RST_CTL_LBN 63
#define FCN_EXT_PHY_RST_CTL_WIDTH 1
#define FCN_PCIE_SD_RST_CTL_LBN 61
#define FCN_PCIE_SD_RST_CTL_WIDTH 1
#define FCN_PCIE_STCK_RST_CTL_LBN 59
#define FCN_PCIE_STCK_RST_CTL_WIDTH 1
#define FCN_PCIE_NSTCK_RST_CTL_LBN 58
#define FCN_PCIE_NSTCK_RST_CTL_WIDTH 1
#define FCN_PCIE_CORE_RST_CTL_LBN 57
#define FCN_PCIE_CORE_RST_CTL_WIDTH 1
#define FCN_EE_RST_CTL_LBN 49
#define FCN_EE_RST_CTL_WIDTH 1
#define FCN_RST_EXT_PHY_LBN 31
#define FCN_RST_EXT_PHY_WIDTH 1
#define FCN_EXT_PHY_RST_DUR_LBN 1
#define FCN_EXT_PHY_RST_DUR_WIDTH 3
#define FCN_SWRST_LBN 0
#define FCN_SWRST_WIDTH 1
#define INCLUDE_IN_RESET 0
#define EXCLUDE_FROM_RESET 1

/* FPGA build version */
#define FCN_ALTERA_BUILD_REG_KER 0x0300
#define FCN_VER_MAJOR_LBN 24
#define FCN_VER_MAJOR_WIDTH 8
#define FCN_VER_MINOR_LBN 16
#define FCN_VER_MINOR_WIDTH 8
#define FCN_VER_BUILD_LBN 0
#define FCN_VER_BUILD_WIDTH 16
#define FCN_VER_ALL_LBN 0
#define FCN_VER_ALL_WIDTH 32

/* Spare EEPROM bits register (flash 0x390) */
#define FCN_SPARE_REG_KER 0x310
#define FCN_MEM_PERR_EN_TX_DATA_LBN 72
#define FCN_MEM_PERR_EN_TX_DATA_WIDTH 2

/* Timer table for kernel access */
#define FCN_TIMER_CMD_REG_KER 0x420
#define FCN_TIMER_MODE_LBN 12
#define FCN_TIMER_MODE_WIDTH 2
#define FCN_TIMER_MODE_DIS 0
#define FCN_TIMER_MODE_INT_HLDOFF 1
#define FCN_TIMER_VAL_LBN 0
#define FCN_TIMER_VAL_WIDTH 12

/* Receive configuration register */
#define FCN_RX_CFG_REG_KER 0x800
#define FCN_RX_XOFF_EN_LBN 0
#define FCN_RX_XOFF_EN_WIDTH 1

/* SRAM receive descriptor cache configuration register */
#define FCN_SRM_RX_DC_CFG_REG_KER 0x610
#define FCN_SRM_RX_DC_BASE_ADR_LBN 0
#define FCN_SRM_RX_DC_BASE_ADR_WIDTH 21

/* SRAM transmit descriptor cache configuration register */
#define FCN_SRM_TX_DC_CFG_REG_KER 0x620
#define FCN_SRM_TX_DC_BASE_ADR_LBN 0
#define FCN_SRM_TX_DC_BASE_ADR_WIDTH 21

/* SRAM configuration register */
#define FCN_SRM_CFG_REG_KER 0x630
#define FCN_SRAM_OOB_ADR_INTEN_LBN 5
#define FCN_SRAM_OOB_ADR_INTEN_WIDTH 1
#define FCN_SRAM_OOB_BUF_INTEN_LBN 4
#define FCN_SRAM_OOB_BUF_INTEN_WIDTH 1
#define FCN_SRAM_OOB_BT_INIT_EN_LBN 3
#define FCN_SRAM_OOB_BT_INIT_EN_WIDTH 1
#define FCN_SRM_NUM_BANK_LBN 2
#define FCN_SRM_NUM_BANK_WIDTH 1
#define FCN_SRM_BANK_SIZE_LBN 0
#define FCN_SRM_BANK_SIZE_WIDTH 2
#define FCN_SRM_NUM_BANKS_AND_BANK_SIZE_LBN 0
#define FCN_SRM_NUM_BANKS_AND_BANK_SIZE_WIDTH 3

#define FCN_RX_CFG_REG_KER 0x800
#define FCN_RX_INGR_EN_B0_LBN 47
#define FCN_RX_INGR_EN_B0_WIDTH 1
#define FCN_RX_USR_BUF_SIZE_B0_LBN 19
#define FCN_RX_USR_BUF_SIZE_B0_WIDTH 9
#define FCN_RX_XON_MAC_TH_B0_LBN 10
#define FCN_RX_XON_MAC_TH_B0_WIDTH 9
#define FCN_RX_XOFF_MAC_TH_B0_LBN 1
#define FCN_RX_XOFF_MAC_TH_B0_WIDTH 9
#define FCN_RX_XOFF_MAC_EN_B0_LBN 0
#define FCN_RX_XOFF_MAC_EN_B0_WIDTH 1
#define FCN_RX_USR_BUF_SIZE_A1_LBN 11
#define FCN_RX_USR_BUF_SIZE_A1_WIDTH 9
#define FCN_RX_XON_MAC_TH_A1_LBN 6
#define FCN_RX_XON_MAC_TH_A1_WIDTH 5
#define FCN_RX_XOFF_MAC_TH_A1_LBN 1
#define FCN_RX_XOFF_MAC_TH_A1_WIDTH 5
#define FCN_RX_XOFF_MAC_EN_A1_LBN 0
#define FCN_RX_XOFF_MAC_EN_A1_WIDTH 1

#define FCN_RX_USR_BUF_SIZE_A1_LBN 11
#define FCN_RX_USR_BUF_SIZE_A1_WIDTH 9
#define FCN_RX_XOFF_MAC_EN_A1_LBN 0
#define FCN_RX_XOFF_MAC_EN_A1_WIDTH 1

/* Receive filter control register */
#define FCN_RX_FILTER_CTL_REG_KER 0x810
#define FCN_UDP_FULL_SRCH_LIMIT_LBN 32
#define FCN_UDP_FULL_SRCH_LIMIT_WIDTH 8
#define FCN_NUM_KER_LBN 24
#define FCN_NUM_KER_WIDTH 2
#define FCN_UDP_WILD_SRCH_LIMIT_LBN 16
#define FCN_UDP_WILD_SRCH_LIMIT_WIDTH 8
#define FCN_TCP_WILD_SRCH_LIMIT_LBN 8
#define FCN_TCP_WILD_SRCH_LIMIT_WIDTH 8
#define FCN_TCP_FULL_SRCH_LIMIT_LBN 0
#define FCN_TCP_FULL_SRCH_LIMIT_WIDTH 8

/* RX queue flush register */
#define FCN_RX_FLUSH_DESCQ_REG_KER 0x0820
#define FCN_RX_FLUSH_DESCQ_CMD_LBN 24
#define FCN_RX_FLUSH_DESCQ_CMD_WIDTH 1
#define FCN_RX_FLUSH_DESCQ_LBN 0
#define FCN_RX_FLUSH_DESCQ_WIDTH 12

/* Receive descriptor update register */
#define FCN_RX_DESC_UPD_REG_KER 0x0830
#define FCN_RX_DESC_WPTR_LBN 96
#define FCN_RX_DESC_WPTR_WIDTH 12
#define FCN_RX_DESC_UPD_REG_KER_DWORD ( FCN_RX_DESC_UPD_REG_KER + 12 )
#define FCN_RX_DESC_WPTR_DWORD_LBN 0
#define FCN_RX_DESC_WPTR_DWORD_WIDTH 12

/* Receive descriptor cache configuration register */
#define FCN_RX_DC_CFG_REG_KER 0x840
#define FCN_RX_DC_SIZE_LBN 0
#define FCN_RX_DC_SIZE_WIDTH 2

#define FCN_RX_SELF_RST_REG_KER 0x890
#define FCN_RX_ISCSI_DIS_LBN 17
#define FCN_RX_ISCSI_DIS_WIDTH 1
#define FCN_RX_NODESC_WAIT_DIS_LBN 9
#define FCN_RX_NODESC_WAIT_DIS_WIDTH 1
#define FCN_RX_RECOVERY_EN_LBN 8
#define FCN_RX_RECOVERY_EN_WIDTH 1

/* TX queue flush register */
#define FCN_TX_FLUSH_DESCQ_REG_KER 0x0a00
#define FCN_TX_FLUSH_DESCQ_CMD_LBN 12
#define FCN_TX_FLUSH_DESCQ_CMD_WIDTH 1
#define FCN_TX_FLUSH_DESCQ_LBN 0
#define FCN_TX_FLUSH_DESCQ_WIDTH 12

/* Transmit configuration register 2 */
#define FCN_TX_CFG2_REG_KER 0xa80
#define FCN_TX_DIS_NON_IP_EV_LBN 17
#define FCN_TX_DIS_NON_IP_EV_WIDTH 1

/* Transmit descriptor update register */
#define FCN_TX_DESC_UPD_REG_KER 0x0a10
#define FCN_TX_DESC_WPTR_LBN 96
#define FCN_TX_DESC_WPTR_WIDTH 12
#define FCN_TX_DESC_UPD_REG_KER_DWORD ( FCN_TX_DESC_UPD_REG_KER + 12 )
#define FCN_TX_DESC_WPTR_DWORD_LBN 0
#define FCN_TX_DESC_WPTR_DWORD_WIDTH 12

/* Transmit descriptor cache configuration register */
#define FCN_TX_DC_CFG_REG_KER 0xa20
#define FCN_TX_DC_SIZE_LBN 0
#define FCN_TX_DC_SIZE_WIDTH 2

/* PHY management transmit data register */
#define FCN_MD_TXD_REG_KER 0xc00
#define FCN_MD_TXD_LBN 0
#define FCN_MD_TXD_WIDTH 16

/* PHY management receive data register */
#define FCN_MD_RXD_REG_KER 0xc10
#define FCN_MD_RXD_LBN 0
#define FCN_MD_RXD_WIDTH 16

/* PHY management configuration & status register */
#define FCN_MD_CS_REG_KER 0xc20
#define FCN_MD_GC_LBN 4
#define FCN_MD_GC_WIDTH 1
#define FCN_MD_RIC_LBN 2
#define FCN_MD_RIC_WIDTH 1
#define FCN_MD_RDC_LBN 1
#define FCN_MD_RDC_WIDTH 1
#define FCN_MD_WRC_LBN 0
#define FCN_MD_WRC_WIDTH 1

/* PHY management PHY address register */
#define FCN_MD_PHY_ADR_REG_KER 0xc30
#define FCN_MD_PHY_ADR_LBN 0
#define FCN_MD_PHY_ADR_WIDTH 16

/* PHY management ID register */
#define FCN_MD_ID_REG_KER 0xc40
#define FCN_MD_PRT_ADR_LBN 11
#define FCN_MD_PRT_ADR_WIDTH 5
#define FCN_MD_DEV_ADR_LBN 6
#define FCN_MD_DEV_ADR_WIDTH 5

/* PHY management status & mask register */
#define FCN_MD_STAT_REG_KER 0xc50
#define FCN_MD_PINT_LBN 4
#define FCN_MD_PINT_WIDTH 1
#define FCN_MD_DONE_LBN 3
#define FCN_MD_DONE_WIDTH 1
#define FCN_MD_BSERR_LBN 2
#define FCN_MD_BSERR_WIDTH 1
#define FCN_MD_LNFL_LBN 1
#define FCN_MD_LNFL_WIDTH 1
#define FCN_MD_BSY_LBN 0
#define FCN_MD_BSY_WIDTH 1

/* Port 0 and 1 MAC control registers */
#define FCN_MAC0_CTRL_REG_KER 0xc80
#define FCN_MAC1_CTRL_REG_KER 0xc90
#define FCN_MAC_XOFF_VAL_LBN 16
#define FCN_MAC_XOFF_VAL_WIDTH 16
#define FCN_MAC_BCAD_ACPT_LBN 4
#define FCN_MAC_BCAD_ACPT_WIDTH 1
#define FCN_MAC_UC_PROM_LBN 3
#define FCN_MAC_UC_PROM_WIDTH 1
#define FCN_MAC_LINK_STATUS_LBN 2
#define FCN_MAC_LINK_STATUS_WIDTH 1
#define FCN_MAC_SPEED_LBN 0
#define FCN_MAC_SPEED_WIDTH 2

/* 10Gig Xaui XGXS Default Values  */
#define XX_TXDRV_DEQ_DEFAULT 0xe /* deq=.6 */
#define XX_TXDRV_DTX_DEFAULT 0x5 /* 1.25 */
#define XX_SD_CTL_DRV_DEFAULT 0  /* 20mA */

/* GMAC registers */
#define FALCON_GMAC_REGBANK 0xe00
#define FALCON_GMAC_REGBANK_SIZE 0x200
#define FALCON_GMAC_REG_SIZE 0x10

/* XGMAC registers */
#define FALCON_XMAC_REGBANK 0x1200
#define FALCON_XMAC_REGBANK_SIZE 0x200
#define FALCON_XMAC_REG_SIZE 0x10

/* XGMAC address register low */
#define FCN_XM_ADR_LO_REG_MAC 0x00
#define FCN_XM_ADR_3_LBN 24
#define FCN_XM_ADR_3_WIDTH 8
#define FCN_XM_ADR_2_LBN 16
#define FCN_XM_ADR_2_WIDTH 8
#define FCN_XM_ADR_1_LBN 8
#define FCN_XM_ADR_1_WIDTH 8
#define FCN_XM_ADR_0_LBN 0
#define FCN_XM_ADR_0_WIDTH 8

/* XGMAC address register high */
#define FCN_XM_ADR_HI_REG_MAC 0x01
#define FCN_XM_ADR_5_LBN 8
#define FCN_XM_ADR_5_WIDTH 8
#define FCN_XM_ADR_4_LBN 0
#define FCN_XM_ADR_4_WIDTH 8

/* XGMAC global configuration - port 0*/
#define FCN_XM_GLB_CFG_REG_MAC 0x02
#define FCN_XM_RX_STAT_EN_LBN 11
#define FCN_XM_RX_STAT_EN_WIDTH 1
#define FCN_XM_TX_STAT_EN_LBN 10
#define FCN_XM_TX_STAT_EN_WIDTH 1
#define FCN_XM_RX_JUMBO_MODE_LBN 6
#define FCN_XM_RX_JUMBO_MODE_WIDTH 1
#define FCN_XM_CORE_RST_LBN 0
#define FCN_XM_CORE_RST_WIDTH 1

/* XGMAC transmit configuration - port 0 */
#define FCN_XM_TX_CFG_REG_MAC 0x03
#define FCN_XM_IPG_LBN 16
#define FCN_XM_IPG_WIDTH 4
#define FCN_XM_FCNTL_LBN 10
#define FCN_XM_FCNTL_WIDTH 1
#define FCN_XM_TXCRC_LBN 8
#define FCN_XM_TXCRC_WIDTH 1
#define FCN_XM_AUTO_PAD_LBN 5
#define FCN_XM_AUTO_PAD_WIDTH 1
#define FCN_XM_TX_PRMBL_LBN 2
#define FCN_XM_TX_PRMBL_WIDTH 1
#define FCN_XM_TXEN_LBN 1
#define FCN_XM_TXEN_WIDTH 1

/* XGMAC receive configuration - port 0 */
#define FCN_XM_RX_CFG_REG_MAC 0x04
#define FCN_XM_PASS_CRC_ERR_LBN 25
#define FCN_XM_PASS_CRC_ERR_WIDTH 1
#define FCN_XM_AUTO_DEPAD_LBN 8
#define FCN_XM_AUTO_DEPAD_WIDTH 1
#define FCN_XM_RXEN_LBN 1
#define FCN_XM_RXEN_WIDTH 1

/* XGMAC management interrupt mask register */
#define FCN_XM_MGT_INT_MSK_REG_MAC_B0 0x5
#define FCN_XM_MSK_PRMBLE_ERR_LBN 2
#define FCN_XM_MSK_PRMBLE_ERR_WIDTH 1
#define FCN_XM_MSK_RMTFLT_LBN 1
#define FCN_XM_MSK_RMTFLT_WIDTH 1
#define FCN_XM_MSK_LCLFLT_LBN 0
#define FCN_XM_MSK_LCLFLT_WIDTH 1

/* XGMAC flow control register */
#define FCN_XM_FC_REG_MAC 0x7
#define FCN_XM_PAUSE_TIME_LBN 16
#define FCN_XM_PAUSE_TIME_WIDTH 16
#define FCN_XM_DIS_FCNTL_LBN 0
#define FCN_XM_DIS_FCNTL_WIDTH 1

/* XGMAC transmit parameter register */
#define FCN_XM_TX_PARAM_REG_MAC 0x0d
#define FCN_XM_TX_JUMBO_MODE_LBN 31
#define FCN_XM_TX_JUMBO_MODE_WIDTH 1
#define FCN_XM_MAX_TX_FRM_SIZE_LBN 16
#define FCN_XM_MAX_TX_FRM_SIZE_WIDTH 14
#define FCN_XM_ACPT_ALL_MCAST_LBN 11
#define FCN_XM_ACPT_ALL_MCAST_WIDTH 1

/* XGMAC receive parameter register */
#define FCN_XM_RX_PARAM_REG_MAC 0x0e
#define FCN_XM_MAX_RX_FRM_SIZE_LBN 0
#define FCN_XM_MAX_RX_FRM_SIZE_WIDTH 14

/* XGMAC management interrupt status register */
#define FCN_XM_MGT_INT_REG_MAC_B0 0x0f
#define FCN_XM_PRMBLE_ERR 2
#define FCN_XM_PRMBLE_WIDTH 1
#define FCN_XM_RMTFLT_LBN 1
#define FCN_XM_RMTFLT_WIDTH 1
#define FCN_XM_LCLFLT_LBN 0
#define FCN_XM_LCLFLT_WIDTH 1

/* XAUI XGXS core status register */
#define FCN_XX_ALIGN_DONE_LBN 20
#define FCN_XX_ALIGN_DONE_WIDTH 1
#define FCN_XX_CORE_STAT_REG_MAC 0x16
#define FCN_XX_SYNC_STAT_LBN 16
#define FCN_XX_SYNC_STAT_WIDTH 4
#define FCN_XX_SYNC_STAT_DECODE_SYNCED 0xf
#define FCN_XX_COMMA_DET_LBN 12
#define FCN_XX_COMMA_DET_WIDTH 4
#define FCN_XX_COMMA_DET_RESET 0xf
#define FCN_XX_CHARERR_LBN 4
#define FCN_XX_CHARERR_WIDTH 4
#define FCN_XX_CHARERR_RESET 0xf
#define FCN_XX_DISPERR_LBN 0
#define FCN_XX_DISPERR_WIDTH 4
#define FCN_XX_DISPERR_RESET 0xf

/* XGXS/XAUI powerdown/reset register */
#define FCN_XX_PWR_RST_REG_MAC 0x10
#define FCN_XX_PWRDND_EN_LBN 15
#define FCN_XX_PWRDND_EN_WIDTH 1
#define FCN_XX_PWRDNC_EN_LBN 14
#define FCN_XX_PWRDNC_EN_WIDTH 1
#define FCN_XX_PWRDNB_EN_LBN 13
#define FCN_XX_PWRDNB_EN_WIDTH 1
#define FCN_XX_PWRDNA_EN_LBN 12
#define FCN_XX_PWRDNA_EN_WIDTH 1
#define FCN_XX_RSTPLLCD_EN_LBN 9
#define FCN_XX_RSTPLLCD_EN_WIDTH 1
#define FCN_XX_RSTPLLAB_EN_LBN 8
#define FCN_XX_RSTPLLAB_EN_WIDTH 1
#define FCN_XX_RESETD_EN_LBN 7
#define FCN_XX_RESETD_EN_WIDTH 1
#define FCN_XX_RESETC_EN_LBN 6
#define FCN_XX_RESETC_EN_WIDTH 1
#define FCN_XX_RESETB_EN_LBN 5
#define FCN_XX_RESETB_EN_WIDTH 1
#define FCN_XX_RESETA_EN_LBN 4
#define FCN_XX_RESETA_EN_WIDTH 1
#define FCN_XX_RSTXGXSRX_EN_LBN 2
#define FCN_XX_RSTXGXSRX_EN_WIDTH 1
#define FCN_XX_RSTXGXSTX_EN_LBN 1
#define FCN_XX_RSTXGXSTX_EN_WIDTH 1
#define FCN_XX_RST_XX_EN_LBN 0
#define FCN_XX_RST_XX_EN_WIDTH 1


/* XGXS/XAUI powerdown/reset control register */
#define FCN_XX_SD_CTL_REG_MAC 0x11
#define FCN_XX_TERMADJ1_LBN 17
#define FCN_XX_TERMADJ1_WIDTH 1
#define FCN_XX_TERMADJ0_LBN 16
#define FCN_XX_TERMADJ0_WIDTH 1
#define FCN_XX_HIDRVD_LBN 15
#define FCN_XX_HIDRVD_WIDTH 1
#define FCN_XX_LODRVD_LBN 14
#define FCN_XX_LODRVD_WIDTH 1
#define FCN_XX_HIDRVC_LBN 13
#define FCN_XX_HIDRVC_WIDTH 1
#define FCN_XX_LODRVC_LBN 12
#define FCN_XX_LODRVC_WIDTH 1
#define FCN_XX_HIDRVB_LBN 11
#define FCN_XX_HIDRVB_WIDTH 1
#define FCN_XX_LODRVB_LBN 10
#define FCN_XX_LODRVB_WIDTH 1
#define FCN_XX_HIDRVA_LBN 9
#define FCN_XX_HIDRVA_WIDTH 1
#define FCN_XX_LODRVA_LBN 8
#define FCN_XX_LODRVA_WIDTH 1
#define FCN_XX_LPBKD_LBN 3
#define FCN_XX_LPBKD_WIDTH 1
#define FCN_XX_LPBKC_LBN 2
#define FCN_XX_LPBKC_WIDTH 1
#define FCN_XX_LPBKB_LBN 1
#define FCN_XX_LPBKB_WIDTH 1
#define FCN_XX_LPBKA_LBN 0
#define FCN_XX_LPBKA_WIDTH 1

#define FCN_XX_TXDRV_CTL_REG_MAC 0x12
#define FCN_XX_DEQD_LBN 28
#define FCN_XX_DEQD_WIDTH 4
#define FCN_XX_DEQC_LBN 24
#define FCN_XX_DEQC_WIDTH 4
#define FCN_XX_DEQB_LBN 20
#define FCN_XX_DEQB_WIDTH 4
#define FCN_XX_DEQA_LBN 16
#define FCN_XX_DEQA_WIDTH 4
#define FCN_XX_DTXD_LBN 12
#define FCN_XX_DTXD_WIDTH 4
#define FCN_XX_DTXC_LBN 8
#define FCN_XX_DTXC_WIDTH 4
#define FCN_XX_DTXB_LBN 4
#define FCN_XX_DTXB_WIDTH 4
#define FCN_XX_DTXA_LBN 0
#define FCN_XX_DTXA_WIDTH 4

/* Receive filter table */
#define FCN_RX_FILTER_TBL0 0xF00000 

/* Receive descriptor pointer table */
#define FCN_RX_DESC_PTR_TBL_KER_A1 0x11800
#define FCN_RX_DESC_PTR_TBL_KER_B0 0xF40000
#define FCN_RX_ISCSI_DDIG_EN_LBN 88
#define FCN_RX_ISCSI_DDIG_EN_WIDTH 1
#define FCN_RX_ISCSI_HDIG_EN_LBN 87
#define FCN_RX_ISCSI_HDIG_EN_WIDTH 1
#define FCN_RX_DESCQ_BUF_BASE_ID_LBN 36
#define FCN_RX_DESCQ_BUF_BASE_ID_WIDTH 20
#define FCN_RX_DESCQ_EVQ_ID_LBN 24
#define FCN_RX_DESCQ_EVQ_ID_WIDTH 12
#define FCN_RX_DESCQ_OWNER_ID_LBN 10
#define FCN_RX_DESCQ_OWNER_ID_WIDTH 14
#define FCN_RX_DESCQ_SIZE_LBN 3
#define FCN_RX_DESCQ_SIZE_WIDTH 2
#define FCN_RX_DESCQ_SIZE_4K 3
#define FCN_RX_DESCQ_SIZE_2K 2
#define FCN_RX_DESCQ_SIZE_1K 1
#define FCN_RX_DESCQ_SIZE_512 0
#define FCN_RX_DESCQ_TYPE_LBN 2
#define FCN_RX_DESCQ_TYPE_WIDTH 1
#define FCN_RX_DESCQ_JUMBO_LBN 1
#define FCN_RX_DESCQ_JUMBO_WIDTH 1
#define FCN_RX_DESCQ_EN_LBN 0
#define FCN_RX_DESCQ_EN_WIDTH 1

/* Transmit descriptor pointer table */
#define FCN_TX_DESC_PTR_TBL_KER_A1 0x11900
#define FCN_TX_DESC_PTR_TBL_KER_B0 0xF50000
#define FCN_TX_NON_IP_DROP_DIS_B0_LBN 91
#define FCN_TX_NON_IP_DROP_DIS_B0_WIDTH 1
#define FCN_TX_DESCQ_EN_LBN 88
#define FCN_TX_DESCQ_EN_WIDTH 1
#define FCN_TX_ISCSI_DDIG_EN_LBN 87
#define FCN_TX_ISCSI_DDIG_EN_WIDTH 1
#define FCN_TX_ISCSI_HDIG_EN_LBN 86
#define FCN_TX_ISCSI_HDIG_EN_WIDTH 1
#define FCN_TX_DESCQ_BUF_BASE_ID_LBN 36
#define FCN_TX_DESCQ_BUF_BASE_ID_WIDTH 20
#define FCN_TX_DESCQ_EVQ_ID_LBN 24
#define FCN_TX_DESCQ_EVQ_ID_WIDTH 12
#define FCN_TX_DESCQ_OWNER_ID_LBN 10
#define FCN_TX_DESCQ_OWNER_ID_WIDTH 14
#define FCN_TX_DESCQ_SIZE_LBN 3
#define FCN_TX_DESCQ_SIZE_WIDTH 2
#define FCN_TX_DESCQ_SIZE_4K 3
#define FCN_TX_DESCQ_SIZE_2K 2
#define FCN_TX_DESCQ_SIZE_1K 1
#define FCN_TX_DESCQ_SIZE_512 0
#define FCN_TX_DESCQ_TYPE_LBN 1
#define FCN_TX_DESCQ_TYPE_WIDTH 2
#define FCN_TX_DESCQ_FLUSH_LBN 0
#define FCN_TX_DESCQ_FLUSH_WIDTH 1

/* Event queue pointer */
#define FCN_EVQ_PTR_TBL_KER_A1 0x11a00
#define FCN_EVQ_PTR_TBL_KER_B0 0xf60000
#define FCN_EVQ_EN_LBN 23
#define FCN_EVQ_EN_WIDTH 1
#define FCN_EVQ_SIZE_LBN 20
#define FCN_EVQ_SIZE_WIDTH 3
#define FCN_EVQ_SIZE_32K 6
#define FCN_EVQ_SIZE_16K 5
#define FCN_EVQ_SIZE_8K 4
#define FCN_EVQ_SIZE_4K 3
#define FCN_EVQ_SIZE_2K 2
#define FCN_EVQ_SIZE_1K 1
#define FCN_EVQ_SIZE_512 0
#define FCN_EVQ_BUF_BASE_ID_LBN 0
#define FCN_EVQ_BUF_BASE_ID_WIDTH 20

/* RSS indirection table */
#define FCN_RX_RSS_INDIR_TBL_B0 0xFB0000

/* Event queue read pointer */
#define FCN_EVQ_RPTR_REG_KER_A1 0x11b00
#define FCN_EVQ_RPTR_REG_KER_B0 0xfa0000
#define FCN_EVQ_RPTR_LBN 0
#define FCN_EVQ_RPTR_WIDTH 14
#define FCN_EVQ_RPTR_REG_KER_DWORD_A1 ( FCN_EVQ_RPTR_REG_KER_A1 + 0 )
#define FCN_EVQ_RPTR_REG_KER_DWORD_B0 ( FCN_EVQ_RPTR_REG_KER_B0 + 0 )
#define FCN_EVQ_RPTR_DWORD_LBN 0
#define FCN_EVQ_RPTR_DWORD_WIDTH 14

/* Special buffer descriptors */
#define FCN_BUF_FULL_TBL_KER_A1 0x18000
#define FCN_BUF_FULL_TBL_KER_B0 0x800000
#define FCN_IP_DAT_BUF_SIZE_LBN 50
#define FCN_IP_DAT_BUF_SIZE_WIDTH 1
#define FCN_IP_DAT_BUF_SIZE_8K 1
#define FCN_IP_DAT_BUF_SIZE_4K 0
#define FCN_BUF_ADR_FBUF_LBN 14
#define FCN_BUF_ADR_FBUF_WIDTH 34
#define FCN_BUF_OWNER_ID_FBUF_LBN 0
#define FCN_BUF_OWNER_ID_FBUF_WIDTH 14

/** Offset of a GMAC register within Falcon */
#define FALCON_GMAC_REG( efab, mac_reg )                                \
        ( FALCON_GMAC_REGBANK +                                 \
          ( (mac_reg) * FALCON_GMAC_REG_SIZE ) )

/** Offset of an XMAC register within Falcon */
#define FALCON_XMAC_REG( efab_port, mac_reg )                   \
        ( FALCON_XMAC_REGBANK +                                 \
          ( (mac_reg) * FALCON_XMAC_REG_SIZE ) )

#define FCN_MAC_DATA_LBN 0
#define FCN_MAC_DATA_WIDTH 32

/* Transmit descriptor */
#define FCN_TX_KER_PORT_LBN 63
#define FCN_TX_KER_PORT_WIDTH 1
#define FCN_TX_KER_BYTE_CNT_LBN 48
#define FCN_TX_KER_BYTE_CNT_WIDTH 14
#define FCN_TX_KER_BUF_ADR_LBN 0
#define FCN_TX_KER_BUF_ADR_WIDTH EFAB_DMA_TYPE_WIDTH ( 46 )


/* Receive descriptor */
#define FCN_RX_KER_BUF_SIZE_LBN 48
#define FCN_RX_KER_BUF_SIZE_WIDTH 14
#define FCN_RX_KER_BUF_ADR_LBN 0
#define FCN_RX_KER_BUF_ADR_WIDTH EFAB_DMA_TYPE_WIDTH ( 46 )

/* Event queue entries */
#define FCN_EV_CODE_LBN 60
#define FCN_EV_CODE_WIDTH 4
#define FCN_RX_IP_EV_DECODE 0
#define FCN_TX_IP_EV_DECODE 2
#define FCN_DRIVER_EV_DECODE 5

/* Receive events */
#define FCN_RX_EV_PKT_OK_LBN 56
#define FCN_RX_EV_PKT_OK_WIDTH 1
#define FCN_RX_PORT_LBN 30
#define FCN_RX_PORT_WIDTH 1
#define FCN_RX_EV_BYTE_CNT_LBN 16
#define FCN_RX_EV_BYTE_CNT_WIDTH 14
#define FCN_RX_EV_DESC_PTR_LBN 0
#define FCN_RX_EV_DESC_PTR_WIDTH 12

/* Transmit events */
#define FCN_TX_EV_DESC_PTR_LBN 0
#define FCN_TX_EV_DESC_PTR_WIDTH 12

/*******************************************************************************
 *
 *
 * Low-level hardware access
 *
 *
 *******************************************************************************/ 

#define FCN_REVISION_REG(efab, reg) \
        ( ( efab->pci_revision == FALCON_REV_B0 ) ? reg ## _B0 : reg ## _A1 )

#define EFAB_SET_OWORD_FIELD_VER(efab, reg, field, val)                 \
        if ( efab->pci_revision == FALCON_REV_B0 )                      \
                EFAB_SET_OWORD_FIELD ( reg, field ## _B0, val );        \
        else                                                            \
                EFAB_SET_OWORD_FIELD ( reg, field ## _A1, val );

#if FALCON_USE_IO_BAR

/* Write dword via the I/O BAR */
static inline void _falcon_writel ( struct efab_nic *efab, uint32_t value,
                                    unsigned int reg ) {
        outl ( reg, efab->iobase + FCN_IOM_IND_ADR_REG );
        outl ( value, efab->iobase + FCN_IOM_IND_DAT_REG );
}

/* Read dword via the I/O BAR */
static inline uint32_t _falcon_readl ( struct efab_nic *efab,
                                       unsigned int reg ) {
        outl ( reg, efab->iobase + FCN_IOM_IND_ADR_REG );
        return inl ( efab->iobase + FCN_IOM_IND_DAT_REG );
}

#else /* FALCON_USE_IO_BAR */

#define _falcon_writel( efab, value, reg ) \
        writel ( (value), (efab)->membase + (reg) )
#define _falcon_readl( efab, reg ) readl ( (efab)->membase + (reg) )

#endif /* FALCON_USE_IO_BAR */

/**
 * Write to a Falcon register
 *
 */
static inline void
falcon_write ( struct efab_nic *efab, efab_oword_t *value, unsigned int reg )
{

        EFAB_REGDUMP ( "Writing register %x with " EFAB_OWORD_FMT "\n",
                       reg, EFAB_OWORD_VAL ( *value ) );

        _falcon_writel ( efab, value->u32[0], reg + 0  );
        _falcon_writel ( efab, value->u32[1], reg + 4  );
        _falcon_writel ( efab, value->u32[2], reg + 8  );
        wmb();
        _falcon_writel ( efab, value->u32[3], reg + 12 );
        wmb();
}

/**
 * Write to Falcon SRAM
 *
 */
static inline void
falcon_write_sram ( struct efab_nic *efab, efab_qword_t *value,
                    unsigned int index )
{
        unsigned int reg = ( FCN_REVISION_REG ( efab, FCN_BUF_FULL_TBL_KER ) +
                             ( index * sizeof ( *value ) ) );

        EFAB_REGDUMP ( "Writing SRAM register %x with " EFAB_QWORD_FMT "\n",
                       reg, EFAB_QWORD_VAL ( *value ) );

        _falcon_writel ( efab, value->u32[0], reg + 0  );
        _falcon_writel ( efab, value->u32[1], reg + 4  );
        wmb();
}

/**
 * Write dword to Falcon register that allows partial writes
 *
 */
static inline void
falcon_writel ( struct efab_nic *efab, efab_dword_t *value, unsigned int reg )
{
        EFAB_REGDUMP ( "Writing partial register %x with " EFAB_DWORD_FMT "\n",
                       reg, EFAB_DWORD_VAL ( *value ) );
        _falcon_writel ( efab, value->u32[0], reg );
}

/**
 * Read from a Falcon register
 *
 */
static inline void
falcon_read ( struct efab_nic *efab, efab_oword_t *value, unsigned int reg )
{
        value->u32[0] = _falcon_readl ( efab, reg + 0  );
        wmb();
        value->u32[1] = _falcon_readl ( efab, reg + 4  );
        value->u32[2] = _falcon_readl ( efab, reg + 8  );
        value->u32[3] = _falcon_readl ( efab, reg + 12 );

        EFAB_REGDUMP ( "Read from register %x, got " EFAB_OWORD_FMT "\n",
                       reg, EFAB_OWORD_VAL ( *value ) );
}

/** 
 * Read from Falcon SRAM
 *
 */
static inline void
falcon_read_sram ( struct efab_nic *efab, efab_qword_t *value,
                   unsigned int index )
{
        unsigned int reg = ( FCN_REVISION_REG ( efab, FCN_BUF_FULL_TBL_KER ) +
                             ( index * sizeof ( *value ) ) );

        value->u32[0] = _falcon_readl ( efab, reg + 0 );
        value->u32[1] = _falcon_readl ( efab, reg + 4 );
        EFAB_REGDUMP ( "Read from SRAM register %x, got " EFAB_QWORD_FMT "\n",
                       reg, EFAB_QWORD_VAL ( *value ) );
}

/**
 * Read dword from a portion of a Falcon register
 *
 */
static inline void
falcon_readl ( struct efab_nic *efab, efab_dword_t *value, unsigned int reg )
{
        value->u32[0] = _falcon_readl ( efab, reg );
        EFAB_REGDUMP ( "Read from register %x, got " EFAB_DWORD_FMT "\n",
                       reg, EFAB_DWORD_VAL ( *value ) );
}

#define FCN_DUMP_REG( efab, _reg ) do {                         \
                efab_oword_t reg;                               \
                falcon_read ( efab, &reg, _reg );               \
                EFAB_LOG ( #_reg " = " EFAB_OWORD_FMT "\n",     \
                           EFAB_OWORD_VAL ( reg ) );            \
        } while ( 0 );

#define FCN_DUMP_MAC_REG( efab, _mac_reg ) do {                         \
                efab_dword_t reg;                                       \
                efab->mac_op->mac_readl ( efab, &reg, _mac_reg );       \
                EFAB_LOG ( #_mac_reg " = " EFAB_DWORD_FMT "\n",         \
                           EFAB_DWORD_VAL ( reg ) );                    \
        } while ( 0 );

/**
 * See if an event is present
 *
 * @v event             Falcon event structure
 * @ret True            An event is pending
 * @ret False           No event is pending
 *
 * We check both the high and low dword of the event for all ones.  We
 * wrote all ones when we cleared the event, and no valid event can
 * have all ones in either its high or low dwords.  This approach is
 * robust against reordering.
 *
 * Note that using a single 64-bit comparison is incorrect; even
 * though the CPU read will be atomic, the DMA write may not be.
 */
static inline int
falcon_event_present ( falcon_event_t* event )
{
        return ( ! ( EFAB_DWORD_IS_ALL_ONES ( event->dword[0] ) |
                     EFAB_DWORD_IS_ALL_ONES ( event->dword[1] ) ) );
}

static void
falcon_eventq_read_ack ( struct efab_nic *efab, struct efab_ev_queue *ev_queue )
{
        efab_dword_t reg;

        EFAB_POPULATE_DWORD_1 ( reg, FCN_EVQ_RPTR_DWORD, ev_queue->read_ptr );
        falcon_writel ( efab, &reg,
                        FCN_REVISION_REG ( efab, FCN_EVQ_RPTR_REG_KER_DWORD ) );
}

#if 0
/**
 * Dump register contents (for debugging)
 *
 * Marked as static inline so that it will not be compiled in if not
 * used.
 */
static inline void
falcon_dump_regs ( struct efab_nic *efab )
{
        FCN_DUMP_REG ( efab, FCN_INT_EN_REG_KER );
        FCN_DUMP_REG ( efab, FCN_INT_ADR_REG_KER );
        FCN_DUMP_REG ( efab, FCN_GLB_CTL_REG_KER );
        FCN_DUMP_REG ( efab, FCN_TIMER_CMD_REG_KER );
        FCN_DUMP_REG ( efab, FCN_SRM_RX_DC_CFG_REG_KER );
        FCN_DUMP_REG ( efab, FCN_SRM_TX_DC_CFG_REG_KER );
        FCN_DUMP_REG ( efab, FCN_RX_FILTER_CTL_REG_KER );
        FCN_DUMP_REG ( efab, FCN_RX_DC_CFG_REG_KER );
        FCN_DUMP_REG ( efab, FCN_TX_DC_CFG_REG_KER );
        FCN_DUMP_REG ( efab, FCN_MAC0_CTRL_REG_KER );
        FCN_DUMP_REG ( efab, FCN_MAC1_CTRL_REG_KER );
        FCN_DUMP_REG ( efab, FCN_REVISION_REG ( efab, FCN_RX_DESC_PTR_TBL_KER ) );
        FCN_DUMP_REG ( efab, FCN_REVISION_REG ( efab, FCN_TX_DESC_PTR_TBL_KER ) );
        FCN_DUMP_REG ( efab, FCN_REVISION_REG ( efab, FCN_EVQ_PTR_TBL_KER ) );
        FCN_DUMP_MAC_REG ( efab, GM_CFG1_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GM_CFG2_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GM_MAX_FLEN_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GM_MII_MGMT_CFG_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GM_ADR1_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GM_ADR2_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GMF_CFG0_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GMF_CFG1_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GMF_CFG2_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GMF_CFG3_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GMF_CFG4_REG_MAC );
        FCN_DUMP_MAC_REG ( efab, GMF_CFG5_REG_MAC );
}
#endif

static void
falcon_interrupts ( struct efab_nic *efab, int enabled, int force )
{
        efab_oword_t int_en_reg_ker;

        EFAB_POPULATE_OWORD_2 ( int_en_reg_ker,
                                FCN_KER_INT_KER, force,
                                FCN_DRV_INT_EN_KER, enabled );
        falcon_write ( efab, &int_en_reg_ker, FCN_INT_EN_REG_KER );     
}

/*******************************************************************************
 *
 *
 * SPI access
 *
 *
 *******************************************************************************/ 


/** Maximum length for a single SPI transaction */
#define FALCON_SPI_MAX_LEN 16

static int
falcon_spi_wait ( struct efab_nic *efab )
{
        efab_oword_t reg;
        int count;

        count = 0;
        do {
                udelay ( 100 );
                falcon_read ( efab, &reg, FCN_EE_SPI_HCMD_REG );
                if ( EFAB_OWORD_FIELD ( reg, FCN_EE_SPI_HCMD_CMD_EN ) == 0 )
                        return 0;
        } while ( ++count < 1000 );

        EFAB_ERR ( "Timed out waiting for SPI\n" );
        return -ETIMEDOUT;
}

static int
falcon_spi_rw ( struct spi_bus* bus, struct spi_device *device,
                unsigned int command, int address,
                const void* data_out, void *data_in, size_t len )
{
        struct efab_nic *efab = container_of ( bus, struct efab_nic, spi_bus );
        int address_len, rc, device_id, read_cmd;
        efab_oword_t reg;

        /* falcon_init_spi_device() should have reduced the block size
         * down so this constraint holds */
        assert ( len <= FALCON_SPI_MAX_LEN );

        /* Is this the FLASH or EEPROM device? */
        if ( device == &efab->spi_flash )
                device_id = FCN_EE_SPI_FLASH;
        else if ( device == &efab->spi_eeprom )
                device_id = FCN_EE_SPI_EEPROM;
        else {
                EFAB_ERR ( "Unknown device %p\n", device );
                return -EINVAL;
        }

        EFAB_TRACE ( "Executing spi command %d on device %d at %d for %zd bytes\n",
                     command, device_id, address, len );

        /* The bus must be idle */
        rc = falcon_spi_wait ( efab );
        if ( rc )
                goto fail1;

        /* Copy data out */
        if ( data_out ) {
                memcpy ( &reg, data_out, len );
                falcon_write ( efab, &reg, FCN_EE_SPI_HDATA_REG );
        }

        /* Program address register */
        if ( address >= 0 ) {
                EFAB_POPULATE_OWORD_1 ( reg, FCN_EE_SPI_HADR_ADR, address );
                falcon_write ( efab, &reg, FCN_EE_SPI_HADR_REG );
        }

        /* Issue command */
        address_len = ( address >= 0 ) ? device->address_len / 8 : 0;
        read_cmd = ( data_in ? FCN_EE_SPI_READ : FCN_EE_SPI_WRITE );
        EFAB_POPULATE_OWORD_7 ( reg,
                                FCN_EE_SPI_HCMD_CMD_EN, 1,
                                FCN_EE_SPI_HCMD_SF_SEL, device_id,
                                FCN_EE_SPI_HCMD_DABCNT, len,
                                FCN_EE_SPI_HCMD_READ, read_cmd,
                                FCN_EE_SPI_HCMD_DUBCNT, 0,
                                FCN_EE_SPI_HCMD_ADBCNT, address_len,
                                FCN_EE_SPI_HCMD_ENC, command );
        falcon_write ( efab, &reg, FCN_EE_SPI_HCMD_REG );

        /* Wait for the command to complete */
        rc = falcon_spi_wait ( efab );
        if ( rc )
                goto fail2;

        /* Copy data in */
        if ( data_in ) {
                falcon_read ( efab, &reg, FCN_EE_SPI_HDATA_REG );
                memcpy ( data_in, &reg, len );
        }

        return 0;

fail2:
fail1:
        EFAB_ERR ( "Failed SPI command %d to device %d address 0x%x len 0x%zx\n",
                   command, device_id, address, len );

        return rc;
}

/** Portion of EEPROM available for non-volatile options */
static struct nvo_fragment falcon_nvo_fragments[] = {
        { 0x100, 0xf0 },
        { 0, 0 }
};

/*******************************************************************************
 *
 *
 * Falcon bit-bashed I2C interface
 *
 *
 *******************************************************************************/ 

static void
falcon_i2c_bit_write ( struct bit_basher *basher, unsigned int bit_id,
                       unsigned long data )
{
        struct efab_nic *efab = container_of ( basher, struct efab_nic,
                                               i2c_bb.basher );
        efab_oword_t reg;

        falcon_read ( efab, &reg, FCN_GPIO_CTL_REG_KER );
        switch ( bit_id ) {
        case I2C_BIT_SCL:
                EFAB_SET_OWORD_FIELD ( reg, FCN_GPIO0_OEN, ( data ? 0 : 1 ) );
                break;
        case I2C_BIT_SDA:
                EFAB_SET_OWORD_FIELD ( reg, FCN_GPIO3_OEN, ( data ? 0 : 1 ) );
                break;
        default:
                EFAB_ERR ( "%s bit=%d\n", __func__, bit_id );
                break;
        }

        falcon_write ( efab, &reg,  FCN_GPIO_CTL_REG_KER );
}

static int
falcon_i2c_bit_read ( struct bit_basher *basher, unsigned int bit_id )
{
        struct efab_nic *efab = container_of ( basher, struct efab_nic,
                                               i2c_bb.basher );
        efab_oword_t reg;
        
        falcon_read ( efab, &reg, FCN_GPIO_CTL_REG_KER );
        switch ( bit_id ) {
        case I2C_BIT_SCL:
                return EFAB_OWORD_FIELD ( reg, FCN_GPIO0_IN );
                break;
        case I2C_BIT_SDA:
                return EFAB_OWORD_FIELD ( reg, FCN_GPIO3_IN );
                break;
        default:
                EFAB_ERR ( "%s bit=%d\n", __func__, bit_id );
                break;
        }

        return -1;
}

static struct bit_basher_operations falcon_i2c_bit_ops = {
        .read           = falcon_i2c_bit_read,
        .write          = falcon_i2c_bit_write,
};


/*******************************************************************************
 *
 *
 * MDIO access
 *
 *
 *******************************************************************************/ 

static int
falcon_gmii_wait ( struct efab_nic *efab )
{
        efab_dword_t md_stat;
        int count;

        /* wait upto 10ms */
        for (count = 0; count < 1000; count++) {
                falcon_readl ( efab, &md_stat, FCN_MD_STAT_REG_KER );
                if ( EFAB_DWORD_FIELD ( md_stat, FCN_MD_BSY ) == 0 ) {
                        if ( EFAB_DWORD_FIELD ( md_stat, FCN_MD_LNFL ) != 0 ||
                             EFAB_DWORD_FIELD ( md_stat, FCN_MD_BSERR ) != 0 ) {
                                EFAB_ERR ( "Error from GMII access "
                                           EFAB_DWORD_FMT"\n",
                                           EFAB_DWORD_VAL ( md_stat ));
                                return -EIO;
                        }
                        return 0;
                }
                udelay(10);
        }

        EFAB_ERR ( "Timed out waiting for GMII\n" );
        return -ETIMEDOUT;
}

static void
falcon_mdio_write ( struct efab_nic *efab, int device,
                    int location, int value )
{
        efab_oword_t reg;

        EFAB_TRACE ( "Writing GMII %d register %02x with %04x\n",
                     device, location, value );

        /* Check MII not currently being accessed */
        if ( falcon_gmii_wait ( efab ) )
                return;

        /* Write the address/ID register */
        EFAB_POPULATE_OWORD_1 ( reg, FCN_MD_PHY_ADR, location );
        falcon_write ( efab, &reg, FCN_MD_PHY_ADR_REG_KER );

        if ( efab->phy_10g ) {
                /* clause45 */
                EFAB_POPULATE_OWORD_2 ( reg, 
                                        FCN_MD_PRT_ADR, efab->phy_addr,
                                        FCN_MD_DEV_ADR, device );
        }
        else {
                /* clause22 */
                assert ( device == 0 );

                EFAB_POPULATE_OWORD_2 ( reg,
                                        FCN_MD_PRT_ADR, efab->phy_addr,
                                        FCN_MD_DEV_ADR, location );
        }
        falcon_write ( efab, &reg, FCN_MD_ID_REG_KER );
                

        /* Write data */
        EFAB_POPULATE_OWORD_1 ( reg, FCN_MD_TXD, value );
        falcon_write ( efab, &reg, FCN_MD_TXD_REG_KER );

        EFAB_POPULATE_OWORD_2 ( reg,
                                FCN_MD_WRC, 1,
                                FCN_MD_GC, ( efab->phy_10g ? 0 : 1 ) );
        falcon_write ( efab, &reg, FCN_MD_CS_REG_KER );
                
        /* Wait for data to be written */
        if ( falcon_gmii_wait ( efab ) ) {
                /* Abort the write operation */
                EFAB_POPULATE_OWORD_2 ( reg,
                                        FCN_MD_WRC, 0,
                                        FCN_MD_GC, 1);
                falcon_write ( efab, &reg, FCN_MD_CS_REG_KER );
                udelay(10);
        }
}

static int
falcon_mdio_read ( struct efab_nic *efab, int device, int location )
{
        efab_oword_t reg;
        int value;

        /* Check MII not currently being accessed */
        if ( falcon_gmii_wait ( efab ) ) 
                return -1;

        if ( efab->phy_10g ) {
                /* clause45 */
                EFAB_POPULATE_OWORD_1 ( reg, FCN_MD_PHY_ADR, location );
                falcon_write ( efab, &reg, FCN_MD_PHY_ADR_REG_KER );

                EFAB_POPULATE_OWORD_2 ( reg,
                                        FCN_MD_PRT_ADR, efab->phy_addr,
                                        FCN_MD_DEV_ADR, device );
                falcon_write ( efab, &reg, FCN_MD_ID_REG_KER);

                /* request data to be read */
                EFAB_POPULATE_OWORD_2 ( reg,
                                        FCN_MD_RDC, 1,
                                        FCN_MD_GC, 0 );
        }
        else {
                /* clause22 */
                assert ( device == 0 );

                EFAB_POPULATE_OWORD_2 ( reg,
                                        FCN_MD_PRT_ADR, efab->phy_addr,
                                        FCN_MD_DEV_ADR, location );
                falcon_write ( efab, &reg, FCN_MD_ID_REG_KER );

                /* Request data to be read */
                EFAB_POPULATE_OWORD_2 ( reg,
                                        FCN_MD_RIC, 1,
                                        FCN_MD_GC, 1 );
        }

        falcon_write ( efab, &reg, FCN_MD_CS_REG_KER );
                
        /* Wait for data to become available */
        if ( falcon_gmii_wait ( efab ) ) {
                /* Abort the read operation */
                EFAB_POPULATE_OWORD_2 ( reg,
                                        FCN_MD_RIC, 0,
                                        FCN_MD_GC, 1 );
                falcon_write ( efab, &reg, FCN_MD_CS_REG_KER );
                udelay ( 10 );
                value = -1;
        }
        else {
                /* Read the data */
                falcon_read ( efab, &reg, FCN_MD_RXD_REG_KER );
                value = EFAB_OWORD_FIELD ( reg, FCN_MD_RXD );
        }

        EFAB_TRACE ( "Read from GMII %d register %02x, got %04x\n",
                     device, location, value );

        return value;
}

/*******************************************************************************
 *
 *
 * MAC wrapper
 *
 *
 *******************************************************************************/

static void
falcon_reconfigure_mac_wrapper ( struct efab_nic *efab )
{
        efab_oword_t reg;
        int link_speed;

        if ( efab->link_options & LPA_EF_10000 ) {
                link_speed = 0x3;
        } else if ( efab->link_options & LPA_EF_1000 ) {
                link_speed = 0x2;
        } else if ( efab->link_options & LPA_100 ) {
                link_speed = 0x1;
        } else {
                link_speed = 0x0;
        }
        EFAB_POPULATE_OWORD_5 ( reg,
                                FCN_MAC_XOFF_VAL, 0xffff /* datasheet */,
                                FCN_MAC_BCAD_ACPT, 1,
                                FCN_MAC_UC_PROM, 0,
                                FCN_MAC_LINK_STATUS, 1,
                                FCN_MAC_SPEED, link_speed );

        falcon_write ( efab, &reg, FCN_MAC0_CTRL_REG_KER );
}

/*******************************************************************************
 *
 *
 * GMAC handling
 *
 *
 *******************************************************************************/

/* GMAC configuration register 1 */
#define GM_CFG1_REG_MAC 0x00
#define GM_SW_RST_LBN 31
#define GM_SW_RST_WIDTH 1
#define GM_RX_FC_EN_LBN 5
#define GM_RX_FC_EN_WIDTH 1
#define GM_TX_FC_EN_LBN 4
#define GM_TX_FC_EN_WIDTH 1
#define GM_RX_EN_LBN 2
#define GM_RX_EN_WIDTH 1
#define GM_TX_EN_LBN 0
#define GM_TX_EN_WIDTH 1

/* GMAC configuration register 2 */
#define GM_CFG2_REG_MAC 0x01
#define GM_PAMBL_LEN_LBN 12
#define GM_PAMBL_LEN_WIDTH 4
#define GM_IF_MODE_LBN 8
#define GM_IF_MODE_WIDTH 2
#define GM_PAD_CRC_EN_LBN 2
#define GM_PAD_CRC_EN_WIDTH 1
#define GM_FD_LBN 0
#define GM_FD_WIDTH 1

/* GMAC maximum frame length register */
#define GM_MAX_FLEN_REG_MAC 0x04
#define GM_MAX_FLEN_LBN 0
#define GM_MAX_FLEN_WIDTH 16

/* GMAC MII management configuration register */
#define GM_MII_MGMT_CFG_REG_MAC 0x08
#define GM_MGMT_CLK_SEL_LBN 0
#define GM_MGMT_CLK_SEL_WIDTH 3

/* GMAC MII management command register */
#define GM_MII_MGMT_CMD_REG_MAC 0x09
#define GM_MGMT_SCAN_CYC_LBN 1
#define GM_MGMT_SCAN_CYC_WIDTH 1
#define GM_MGMT_RD_CYC_LBN 0
#define GM_MGMT_RD_CYC_WIDTH 1

/* GMAC MII management address register */
#define GM_MII_MGMT_ADR_REG_MAC 0x0a
#define GM_MGMT_PHY_ADDR_LBN 8
#define GM_MGMT_PHY_ADDR_WIDTH 5
#define GM_MGMT_REG_ADDR_LBN 0
#define GM_MGMT_REG_ADDR_WIDTH 5

/* GMAC MII management control register */
#define GM_MII_MGMT_CTL_REG_MAC 0x0b
#define GM_MGMT_CTL_LBN 0
#define GM_MGMT_CTL_WIDTH 16

/* GMAC MII management status register */
#define GM_MII_MGMT_STAT_REG_MAC 0x0c
#define GM_MGMT_STAT_LBN 0
#define GM_MGMT_STAT_WIDTH 16

/* GMAC MII management indicators register */
#define GM_MII_MGMT_IND_REG_MAC 0x0d
#define GM_MGMT_BUSY_LBN 0
#define GM_MGMT_BUSY_WIDTH 1

/* GMAC station address register 1 */
#define GM_ADR1_REG_MAC 0x10
#define GM_HWADDR_5_LBN 24
#define GM_HWADDR_5_WIDTH 8
#define GM_HWADDR_4_LBN 16
#define GM_HWADDR_4_WIDTH 8
#define GM_HWADDR_3_LBN 8
#define GM_HWADDR_3_WIDTH 8
#define GM_HWADDR_2_LBN 0
#define GM_HWADDR_2_WIDTH 8

/* GMAC station address register 2 */
#define GM_ADR2_REG_MAC 0x11
#define GM_HWADDR_1_LBN 24
#define GM_HWADDR_1_WIDTH 8
#define GM_HWADDR_0_LBN 16
#define GM_HWADDR_0_WIDTH 8

/* GMAC FIFO configuration register 0 */
#define GMF_CFG0_REG_MAC 0x12
#define GMF_FTFENREQ_LBN 12
#define GMF_FTFENREQ_WIDTH 1
#define GMF_STFENREQ_LBN 11
#define GMF_STFENREQ_WIDTH 1
#define GMF_FRFENREQ_LBN 10
#define GMF_FRFENREQ_WIDTH 1
#define GMF_SRFENREQ_LBN 9
#define GMF_SRFENREQ_WIDTH 1
#define GMF_WTMENREQ_LBN 8
#define GMF_WTMENREQ_WIDTH 1

/* GMAC FIFO configuration register 1 */
#define GMF_CFG1_REG_MAC 0x13
#define GMF_CFGFRTH_LBN 16
#define GMF_CFGFRTH_WIDTH 5
#define GMF_CFGXOFFRTX_LBN 0
#define GMF_CFGXOFFRTX_WIDTH 16

/* GMAC FIFO configuration register 2 */
#define GMF_CFG2_REG_MAC 0x14
#define GMF_CFGHWM_LBN 16
#define GMF_CFGHWM_WIDTH 6
#define GMF_CFGLWM_LBN 0
#define GMF_CFGLWM_WIDTH 6

/* GMAC FIFO configuration register 3 */
#define GMF_CFG3_REG_MAC 0x15
#define GMF_CFGHWMFT_LBN 16
#define GMF_CFGHWMFT_WIDTH 6
#define GMF_CFGFTTH_LBN 0
#define GMF_CFGFTTH_WIDTH 6

/* GMAC FIFO configuration register 4 */
#define GMF_CFG4_REG_MAC 0x16
#define GMF_HSTFLTRFRM_PAUSE_LBN 12
#define GMF_HSTFLTRFRM_PAUSE_WIDTH 12

/* GMAC FIFO configuration register 5 */
#define GMF_CFG5_REG_MAC 0x17
#define GMF_CFGHDPLX_LBN 22
#define GMF_CFGHDPLX_WIDTH 1
#define GMF_CFGBYTMODE_LBN 19
#define GMF_CFGBYTMODE_WIDTH 1
#define GMF_HSTDRPLT64_LBN 18
#define GMF_HSTDRPLT64_WIDTH 1
#define GMF_HSTFLTRFRMDC_PAUSE_LBN 12
#define GMF_HSTFLTRFRMDC_PAUSE_WIDTH 1

static void
falcon_gmac_writel ( struct efab_nic *efab, efab_dword_t *value,
                     unsigned int mac_reg )
{
        efab_oword_t temp;

        EFAB_POPULATE_OWORD_1 ( temp, FCN_MAC_DATA,
                                EFAB_DWORD_FIELD ( *value, FCN_MAC_DATA ) );
        falcon_write ( efab, &temp, FALCON_GMAC_REG ( efab, mac_reg ) );
}

static void
falcon_gmac_readl ( struct efab_nic *efab, efab_dword_t *value,
                    unsigned int mac_reg )
{
        efab_oword_t temp;

        falcon_read ( efab, &temp, FALCON_GMAC_REG ( efab, mac_reg ) );
        EFAB_POPULATE_DWORD_1 ( *value, FCN_MAC_DATA,
                                EFAB_OWORD_FIELD ( temp, FCN_MAC_DATA ) );
}

static void
mentormac_reset ( struct efab_nic *efab )
{
        efab_dword_t reg;

        /* Take into reset */
        EFAB_POPULATE_DWORD_1 ( reg, GM_SW_RST, 1 );
        falcon_gmac_writel ( efab, &reg, GM_CFG1_REG_MAC );
        udelay ( 1000 );

        /* Take out of reset */
        EFAB_POPULATE_DWORD_1 ( reg, GM_SW_RST, 0 );
        falcon_gmac_writel ( efab, &reg, GM_CFG1_REG_MAC );
        udelay ( 1000 );

        /* Configure GMII interface so PHY is accessible.  Note that
         * GMII interface is connected only to port 0, and that on
         * Falcon this is a no-op.
         */
        EFAB_POPULATE_DWORD_1 ( reg, GM_MGMT_CLK_SEL, 0x4 );
        falcon_gmac_writel ( efab, &reg, GM_MII_MGMT_CFG_REG_MAC );
        udelay ( 10 );
}

static void
mentormac_init ( struct efab_nic *efab )
{
        int pause, if_mode, full_duplex, bytemode, half_duplex;
        efab_dword_t reg;

        /* Configuration register 1 */
        pause = ( efab->link_options & LPA_PAUSE_CAP ) ? 1 : 0;
        if ( ! ( efab->link_options & LPA_EF_DUPLEX ) ) {
                /* Half-duplex operation requires TX flow control */
                pause = 1;
        }
        EFAB_POPULATE_DWORD_4 ( reg,
                                GM_TX_EN, 1,
                                GM_TX_FC_EN, pause,
                                GM_RX_EN, 1,
                                GM_RX_FC_EN, 1 );
        falcon_gmac_writel ( efab, &reg, GM_CFG1_REG_MAC );
        udelay ( 10 );

        /* Configuration register 2 */
        if_mode = ( efab->link_options & LPA_EF_1000 ) ? 2 : 1;
        full_duplex = ( efab->link_options & LPA_EF_DUPLEX ) ? 1 : 0;
        EFAB_POPULATE_DWORD_4 ( reg,
                                GM_IF_MODE, if_mode,
                                GM_PAD_CRC_EN, 1,
                                GM_FD, full_duplex,
                                GM_PAMBL_LEN, 0x7 /* ? */ );
        falcon_gmac_writel ( efab, &reg, GM_CFG2_REG_MAC );
        udelay ( 10 );

        /* Max frame len register */
        EFAB_POPULATE_DWORD_1 ( reg, GM_MAX_FLEN,
                                EFAB_MAX_FRAME_LEN ( ETH_FRAME_LEN ) );
        falcon_gmac_writel ( efab, &reg, GM_MAX_FLEN_REG_MAC );
        udelay ( 10 );

        /* FIFO configuration register 0 */
        EFAB_POPULATE_DWORD_5 ( reg,
                                GMF_FTFENREQ, 1,
                                GMF_STFENREQ, 1,
                                GMF_FRFENREQ, 1,
                                GMF_SRFENREQ, 1,
                                GMF_WTMENREQ, 1 );
        falcon_gmac_writel ( efab, &reg, GMF_CFG0_REG_MAC );
        udelay ( 10 );

        /* FIFO configuration register 1 */
        EFAB_POPULATE_DWORD_2 ( reg,
                                GMF_CFGFRTH, 0x12,
                                GMF_CFGXOFFRTX, 0xffff );
        falcon_gmac_writel ( efab, &reg, GMF_CFG1_REG_MAC );
        udelay ( 10 );

        /* FIFO configuration register 2 */
        EFAB_POPULATE_DWORD_2 ( reg,
                                GMF_CFGHWM, 0x3f,
                                GMF_CFGLWM, 0xa );
        falcon_gmac_writel ( efab, &reg, GMF_CFG2_REG_MAC );
        udelay ( 10 );

        /* FIFO configuration register 3 */
        EFAB_POPULATE_DWORD_2 ( reg,
                                GMF_CFGHWMFT, 0x1c,
                                GMF_CFGFTTH, 0x08 );
        falcon_gmac_writel ( efab, &reg, GMF_CFG3_REG_MAC );
        udelay ( 10 );

        /* FIFO configuration register 4 */
        EFAB_POPULATE_DWORD_1 ( reg, GMF_HSTFLTRFRM_PAUSE, 1 );
        falcon_gmac_writel ( efab, &reg, GMF_CFG4_REG_MAC );
        udelay ( 10 );
        
        /* FIFO configuration register 5 */
        bytemode = ( efab->link_options & LPA_EF_1000 ) ? 1 : 0;
        half_duplex = ( efab->link_options & LPA_EF_DUPLEX ) ? 0 : 1;
        falcon_gmac_readl ( efab, &reg, GMF_CFG5_REG_MAC );
        EFAB_SET_DWORD_FIELD ( reg, GMF_CFGBYTMODE, bytemode );
        EFAB_SET_DWORD_FIELD ( reg, GMF_CFGHDPLX, half_duplex );
        EFAB_SET_DWORD_FIELD ( reg, GMF_HSTDRPLT64, half_duplex );
        EFAB_SET_DWORD_FIELD ( reg, GMF_HSTFLTRFRMDC_PAUSE, 0 );
        falcon_gmac_writel ( efab, &reg, GMF_CFG5_REG_MAC );
        udelay ( 10 );
        
        /* MAC address */
        EFAB_POPULATE_DWORD_4 ( reg,
                                GM_HWADDR_5, efab->mac_addr[5],
                                GM_HWADDR_4, efab->mac_addr[4],
                                GM_HWADDR_3, efab->mac_addr[3],
                                GM_HWADDR_2, efab->mac_addr[2] );
        falcon_gmac_writel ( efab, &reg, GM_ADR1_REG_MAC );
        udelay ( 10 );
        EFAB_POPULATE_DWORD_2 ( reg,
                                GM_HWADDR_1, efab->mac_addr[1],
                                GM_HWADDR_0, efab->mac_addr[0] );
        falcon_gmac_writel ( efab, &reg, GM_ADR2_REG_MAC );
        udelay ( 10 );
}

static int
falcon_init_gmac ( struct efab_nic *efab )
{
        /* Reset the MAC */
        mentormac_reset ( efab );

        /* Initialise PHY */
        efab->phy_op->init ( efab );

        /* check the link is up */
        if ( !efab->link_up )
                return -EAGAIN;

        /* Initialise MAC */
        mentormac_init ( efab );

        /* reconfigure the MAC wrapper */
        falcon_reconfigure_mac_wrapper ( efab );

        return 0;
}

static struct efab_mac_operations falcon_gmac_operations = {
        .init                   = falcon_init_gmac,
};


/*******************************************************************************
 *
 *
 * XMAC handling
 *
 *
 *******************************************************************************/

/**
 * Write dword to a Falcon XMAC register
 *
 */
static void
falcon_xmac_writel ( struct efab_nic *efab, efab_dword_t *value,
                     unsigned int mac_reg )
{
        efab_oword_t temp;

        EFAB_POPULATE_OWORD_1 ( temp, FCN_MAC_DATA,
                                EFAB_DWORD_FIELD ( *value, FCN_MAC_DATA ) );
        falcon_write ( efab, &temp,
                       FALCON_XMAC_REG ( efab, mac_reg ) );
}

/**
 * Read dword from a Falcon XMAC register
 *
 */
static void
falcon_xmac_readl ( struct efab_nic *efab, efab_dword_t *value,
                    unsigned int mac_reg )
{
        efab_oword_t temp;

        falcon_read ( efab, &temp,
                      FALCON_XMAC_REG ( efab, mac_reg ) );
        EFAB_POPULATE_DWORD_1 ( *value, FCN_MAC_DATA,
                                EFAB_OWORD_FIELD ( temp, FCN_MAC_DATA ) );
}

/**
 * Configure Falcon XAUI output
 */
static void
falcon_setup_xaui ( struct efab_nic *efab )
{
        efab_dword_t sdctl, txdrv;

        falcon_xmac_readl ( efab, &sdctl, FCN_XX_SD_CTL_REG_MAC );
        EFAB_SET_DWORD_FIELD ( sdctl, FCN_XX_HIDRVD, XX_SD_CTL_DRV_DEFAULT );
        EFAB_SET_DWORD_FIELD ( sdctl, FCN_XX_LODRVD, XX_SD_CTL_DRV_DEFAULT );
        EFAB_SET_DWORD_FIELD ( sdctl, FCN_XX_HIDRVC, XX_SD_CTL_DRV_DEFAULT );
        EFAB_SET_DWORD_FIELD ( sdctl, FCN_XX_LODRVC, XX_SD_CTL_DRV_DEFAULT );
        EFAB_SET_DWORD_FIELD ( sdctl, FCN_XX_HIDRVB, XX_SD_CTL_DRV_DEFAULT );
        EFAB_SET_DWORD_FIELD ( sdctl, FCN_XX_LODRVB, XX_SD_CTL_DRV_DEFAULT );
        EFAB_SET_DWORD_FIELD ( sdctl, FCN_XX_HIDRVA, XX_SD_CTL_DRV_DEFAULT );
        EFAB_SET_DWORD_FIELD ( sdctl, FCN_XX_LODRVA, XX_SD_CTL_DRV_DEFAULT );
        falcon_xmac_writel ( efab, &sdctl, FCN_XX_SD_CTL_REG_MAC );

        EFAB_POPULATE_DWORD_8 ( txdrv,
                                FCN_XX_DEQD, XX_TXDRV_DEQ_DEFAULT,
                                FCN_XX_DEQC, XX_TXDRV_DEQ_DEFAULT,
                                FCN_XX_DEQB, XX_TXDRV_DEQ_DEFAULT,
                                FCN_XX_DEQA, XX_TXDRV_DEQ_DEFAULT,
                                FCN_XX_DTXD, XX_TXDRV_DTX_DEFAULT,
                                FCN_XX_DTXC, XX_TXDRV_DTX_DEFAULT,
                                FCN_XX_DTXB, XX_TXDRV_DTX_DEFAULT,
                                FCN_XX_DTXA, XX_TXDRV_DTX_DEFAULT);
        falcon_xmac_writel ( efab, &txdrv, FCN_XX_TXDRV_CTL_REG_MAC);
}

static int
falcon_xgmii_status ( struct efab_nic *efab )
{
        efab_dword_t reg;

        if ( efab->pci_revision  < FALCON_REV_B0 )
                return 1;
        /* The ISR latches, so clear it and re-read */
        falcon_xmac_readl ( efab, &reg, FCN_XM_MGT_INT_REG_MAC_B0 );
        falcon_xmac_readl ( efab, &reg, FCN_XM_MGT_INT_REG_MAC_B0 );

        if ( EFAB_DWORD_FIELD ( reg, FCN_XM_LCLFLT ) ||
             EFAB_DWORD_FIELD ( reg, FCN_XM_RMTFLT ) ) {
                EFAB_TRACE ( "MGT_INT: "EFAB_DWORD_FMT"\n",
                             EFAB_DWORD_VAL ( reg ) );
                return 0;
        }

        return 1;
}

static void
falcon_mask_status_intr ( struct efab_nic *efab, int enable )
{
        efab_dword_t reg;

        if ( efab->pci_revision  < FALCON_REV_B0 )
                return;

        /* Flush the ISR */
        if ( enable )
                falcon_xmac_readl ( efab, &reg, FCN_XM_MGT_INT_REG_MAC_B0 );

        EFAB_POPULATE_DWORD_2 ( reg,
                                FCN_XM_MSK_RMTFLT, !enable,
                                FCN_XM_MSK_LCLFLT, !enable);
        falcon_xmac_readl ( efab, &reg, FCN_XM_MGT_INT_MSK_REG_MAC_B0 );
}

/**
 * Reset 10G MAC connected to port
 *
 */
static int
falcon_reset_xmac ( struct efab_nic *efab )
{
        efab_dword_t reg;
        int count;

        EFAB_POPULATE_DWORD_1 ( reg, FCN_XM_CORE_RST, 1 );
        falcon_xmac_writel ( efab, &reg, FCN_XM_GLB_CFG_REG_MAC );

        for ( count = 0 ; count < 1000 ; count++ ) {
                udelay ( 10 );
                falcon_xmac_readl ( efab, &reg,
                                    FCN_XM_GLB_CFG_REG_MAC );
                if ( EFAB_DWORD_FIELD ( reg, FCN_XM_CORE_RST ) == 0 )
                        return 0;
        }
        return -ETIMEDOUT;
}


static int
falcon_reset_xaui ( struct efab_nic *efab )
{
        efab_dword_t reg;
        int count;

        if (!efab->is_asic)
                return 0;

        EFAB_POPULATE_DWORD_1 ( reg, FCN_XX_RST_XX_EN, 1 );
        falcon_xmac_writel ( efab, &reg, FCN_XX_PWR_RST_REG_MAC );

        /* Give some time for the link to establish */
        for (count = 0; count < 1000; count++) { /* wait upto 10ms */
                falcon_xmac_readl ( efab, &reg, FCN_XX_PWR_RST_REG_MAC );
                if ( EFAB_DWORD_FIELD ( reg, FCN_XX_RST_XX_EN ) == 0 ) {
                        falcon_setup_xaui ( efab );
                        return 0;
                }
                udelay(10);
        }
        EFAB_ERR ( "timed out waiting for XAUI/XGXS reset\n" );
        return -ETIMEDOUT;
}

static int
falcon_xaui_link_ok ( struct efab_nic *efab )
{
        efab_dword_t reg;
        int align_done, lane_status, sync;
        int has_phyxs;
        int link_ok = 1;

        /* Read Falcon XAUI side */
        if ( efab->is_asic ) {
                /* Read link status */
                falcon_xmac_readl ( efab, &reg, FCN_XX_CORE_STAT_REG_MAC );
                align_done = EFAB_DWORD_FIELD ( reg, FCN_XX_ALIGN_DONE );

                sync = EFAB_DWORD_FIELD ( reg, FCN_XX_SYNC_STAT );
                sync = ( sync == FCN_XX_SYNC_STAT_DECODE_SYNCED );
                
                link_ok = align_done && sync;
        }

        /* Clear link status ready for next read */
        EFAB_SET_DWORD_FIELD ( reg, FCN_XX_COMMA_DET, FCN_XX_COMMA_DET_RESET );
        EFAB_SET_DWORD_FIELD ( reg, FCN_XX_CHARERR, FCN_XX_CHARERR_RESET);
        EFAB_SET_DWORD_FIELD ( reg, FCN_XX_DISPERR, FCN_XX_DISPERR_RESET);
        falcon_xmac_writel ( efab, &reg, FCN_XX_CORE_STAT_REG_MAC );

        has_phyxs = ( efab->phy_op->mmds & ( 1 << MDIO_MMD_PHYXS ) );
        if ( link_ok && has_phyxs ) {
                lane_status = falcon_mdio_read ( efab, MDIO_MMD_PHYXS,
                                                 MDIO_PHYXS_LANE_STATE );
                link_ok = ( lane_status & ( 1 << MDIO_PHYXS_LANE_ALIGNED_LBN ) );

                if (!link_ok )
                        EFAB_LOG ( "XGXS lane status: %x\n", lane_status );
        }

        return link_ok;
}

/**
 * Initialise XMAC
 *
 */
static void
falcon_reconfigure_xmac ( struct efab_nic *efab )
{
        efab_dword_t reg;
        int max_frame_len;

        /* Configure MAC - cut-thru mode is hard wired on */
        EFAB_POPULATE_DWORD_3 ( reg,
                                FCN_XM_RX_JUMBO_MODE, 1,
                                FCN_XM_TX_STAT_EN, 1,
                                FCN_XM_RX_STAT_EN, 1);
        falcon_xmac_writel ( efab, &reg, FCN_XM_GLB_CFG_REG_MAC );

        /* Configure TX */
        EFAB_POPULATE_DWORD_6 ( reg, 
                                FCN_XM_TXEN, 1,
                                FCN_XM_TX_PRMBL, 1,
                                FCN_XM_AUTO_PAD, 1,
                                FCN_XM_TXCRC, 1,
                                FCN_XM_FCNTL, 1,
                                FCN_XM_IPG, 0x3 );
        falcon_xmac_writel ( efab, &reg, FCN_XM_TX_CFG_REG_MAC );

        /* Configure RX */
        EFAB_POPULATE_DWORD_4 ( reg,
                                FCN_XM_RXEN, 1,
                                FCN_XM_AUTO_DEPAD, 0,
                                FCN_XM_ACPT_ALL_MCAST, 1,
                                FCN_XM_PASS_CRC_ERR, 1 );
        falcon_xmac_writel ( efab, &reg, FCN_XM_RX_CFG_REG_MAC );

        /* Set frame length */
        max_frame_len = EFAB_MAX_FRAME_LEN ( ETH_FRAME_LEN );
        EFAB_POPULATE_DWORD_1 ( reg,
                                FCN_XM_MAX_RX_FRM_SIZE, max_frame_len );
        falcon_xmac_writel ( efab, &reg, FCN_XM_RX_PARAM_REG_MAC );
        EFAB_POPULATE_DWORD_2 ( reg,
                                FCN_XM_MAX_TX_FRM_SIZE, max_frame_len,
                                FCN_XM_TX_JUMBO_MODE, 1 );
        falcon_xmac_writel ( efab, &reg, FCN_XM_TX_PARAM_REG_MAC );

        /* Enable flow control receipt */
        EFAB_POPULATE_DWORD_2 ( reg,
                                FCN_XM_PAUSE_TIME, 0xfffe,
                                FCN_XM_DIS_FCNTL, 0 );
        falcon_xmac_writel ( efab, &reg, FCN_XM_FC_REG_MAC );

        /* Set MAC address */
        EFAB_POPULATE_DWORD_4 ( reg,
                                FCN_XM_ADR_0, efab->mac_addr[0],
                                FCN_XM_ADR_1, efab->mac_addr[1],
                                FCN_XM_ADR_2, efab->mac_addr[2],
                                FCN_XM_ADR_3, efab->mac_addr[3] );
        falcon_xmac_writel ( efab, &reg, FCN_XM_ADR_LO_REG_MAC );
        EFAB_POPULATE_DWORD_2 ( reg,
                                FCN_XM_ADR_4, efab->mac_addr[4],
                                FCN_XM_ADR_5, efab->mac_addr[5] );
        falcon_xmac_writel ( efab, &reg, FCN_XM_ADR_HI_REG_MAC );
}

static int
falcon_init_xmac ( struct efab_nic *efab )
{
        int count, rc;

        /* Mask the PHY management interrupt */
        falcon_mask_status_intr ( efab, 0 );

        /* Initialise the PHY to instantiate the clock. */
        rc = efab->phy_op->init ( efab );
        if ( rc ) {
                EFAB_ERR ( "unable to initialise PHY\n" );
                goto fail1;
        }

        falcon_reset_xaui ( efab );

        /* Give the PHY and MAC time to faff */
        mdelay ( 100 );

        /* Reset and reconfigure the XMAC */
        rc = falcon_reset_xmac ( efab );
        if ( rc )
                goto fail2;
        falcon_reconfigure_xmac ( efab );
        falcon_reconfigure_mac_wrapper ( efab );
        /**
         * Now wait for the link to come up. This may take a while
         * for some slower PHY's.
         */
        for (count=0; count<50; count++) {
                int link_ok = 1;

                /* Wait a while for the link to come up. */
                mdelay ( 100 );
                if ((count % 5) == 0)
                        putchar ( '.' );

                /* Does the PHY think the wire-side link is up? */
                link_ok = mdio_clause45_links_ok ( efab );
                /* Ensure the XAUI link to the PHY is good */
                if ( link_ok ) {
                        link_ok = falcon_xaui_link_ok ( efab );
                        if ( !link_ok )
                                falcon_reset_xaui ( efab );
                }

                /* Check fault indication */
                if ( link_ok )
                        link_ok = falcon_xgmii_status ( efab );

                efab->link_up = link_ok;
                if ( link_ok ) {
                        /* unmask the status interrupt */
                        falcon_mask_status_intr ( efab, 1 );
                        return 0;
                }
        }

        /* Link failed to come up, but initialisation was fine. */
        rc = -ETIMEDOUT;

fail2:
fail1:
        return rc;
}

static struct efab_mac_operations falcon_xmac_operations = {
        .init                   = falcon_init_xmac,
};

/*******************************************************************************
 *
 *
 * Null PHY handling
 *
 *
 *******************************************************************************/

static int
falcon_xaui_phy_init ( struct efab_nic *efab )
{
        /* CX4 is always 10000FD only */
        efab->link_options = LPA_EF_10000FULL;

        /* There is no PHY! */
        return 0;
}

static struct efab_phy_operations falcon_xaui_phy_ops = {
        .init                   = falcon_xaui_phy_init,
        .mmds                   = 0,
};


/*******************************************************************************
 *
 *
 * Alaska PHY
 *
 *
 *******************************************************************************/

/**
 * Initialise Alaska PHY
 *
 */
static int
alaska_init ( struct efab_nic *efab )
{
        unsigned int advertised, lpa;

        /* Read link up status */
        efab->link_up = gmii_link_ok ( efab );

        if ( ! efab->link_up )
                return -EIO;

        /* Determine link options from PHY. */
        advertised = gmii_autoneg_advertised ( efab );
        lpa = gmii_autoneg_lpa ( efab );
        efab->link_options = gmii_nway_result ( advertised & lpa );

        return 0;
}

static struct efab_phy_operations falcon_alaska_phy_ops = {
        .init           = alaska_init,
};

/*******************************************************************************
 *
 *
 * xfp
 *
 *
 *******************************************************************************/

#define XFP_REQUIRED_DEVS ( MDIO_MMDREG_DEVS0_PCS    |          \
                            MDIO_MMDREG_DEVS0_PMAPMD |          \
                            MDIO_MMDREG_DEVS0_PHYXS )

static int
falcon_xfp_phy_init ( struct efab_nic *efab )
{
        int rc;

        /* Optical link is always 10000FD only */
        efab->link_options = LPA_EF_10000FULL;

        /* Reset the PHY */
        rc = mdio_clause45_reset_mmd ( efab, MDIO_MMD_PHYXS );
        if ( rc )
                return rc;

        return 0;
}

static struct efab_phy_operations falcon_xfp_phy_ops = {
        .init                   = falcon_xfp_phy_init,
        .mmds                   = XFP_REQUIRED_DEVS,
};

/*******************************************************************************
 *
 *
 * txc43128
 *
 *
 *******************************************************************************/

/* Command register */
#define TXC_GLRGS_GLCMD         (0xc004)
#define TXC_GLCMD_LMTSWRST_LBN  (14)

/* Amplitude on lanes 0+1, 2+3 */
#define  TXC_ALRGS_ATXAMP0      (0xc041)
#define  TXC_ALRGS_ATXAMP1      (0xc042)
/* Bit position of value for lane 0+2, 1+3 */
#define TXC_ATXAMP_LANE02_LBN   (3)
#define TXC_ATXAMP_LANE13_LBN   (11)

#define TXC_ATXAMP_1280_mV      (0)
#define TXC_ATXAMP_1200_mV      (8)
#define TXC_ATXAMP_1120_mV      (12)
#define TXC_ATXAMP_1060_mV      (14)
#define TXC_ATXAMP_0820_mV      (25)
#define TXC_ATXAMP_0720_mV      (26)
#define TXC_ATXAMP_0580_mV      (27)
#define TXC_ATXAMP_0440_mV      (28)

#define TXC_ATXAMP_0820_BOTH    ( (TXC_ATXAMP_0820_mV << TXC_ATXAMP_LANE02_LBN) | \
                                  (TXC_ATXAMP_0820_mV << TXC_ATXAMP_LANE13_LBN) )

#define TXC_ATXAMP_DEFAULT      (0x6060) /* From databook */

/* Preemphasis on lanes 0+1, 2+3 */
#define  TXC_ALRGS_ATXPRE0      (0xc043)
#define  TXC_ALRGS_ATXPRE1      (0xc044)

#define TXC_ATXPRE_NONE (0)
#define TXC_ATXPRE_DEFAULT      (0x1010) /* From databook */

#define TXC_REQUIRED_DEVS ( MDIO_MMDREG_DEVS0_PCS    |         \
                            MDIO_MMDREG_DEVS0_PMAPMD |         \
                            MDIO_MMDREG_DEVS0_PHYXS )

static int
falcon_txc_logic_reset ( struct efab_nic *efab )
{
        int val;
        int tries = 50;

        val = falcon_mdio_read ( efab, MDIO_MMD_PCS, TXC_GLRGS_GLCMD );
        val |= (1 << TXC_GLCMD_LMTSWRST_LBN);
        falcon_mdio_write ( efab, MDIO_MMD_PCS, TXC_GLRGS_GLCMD, val );

        while ( tries--) {
                val = falcon_mdio_read ( efab, MDIO_MMD_PCS, TXC_GLRGS_GLCMD );
                if ( ~val & ( 1 << TXC_GLCMD_LMTSWRST_LBN ) )
                        return 0;
                udelay(1);
        }

        EFAB_ERR ( "logic reset failed\n" );

        return -ETIMEDOUT;
}

static int
falcon_txc_phy_init ( struct efab_nic *efab )
{
        int rc;

        /* CX4 is always 10000FD only */
        efab->link_options = LPA_EF_10000FULL;

        /* reset the phy */
        rc = mdio_clause45_reset_mmd ( efab, MDIO_MMD_PMAPMD );
        if ( rc )
                goto fail1;

        rc = mdio_clause45_check_mmds ( efab );
        if ( rc )
                goto fail2;

        /* Turn amplitude down and preemphasis off on the host side
         * (PHY<->MAC) as this is believed less likely to upset falcon
         * and no adverse effects have been noted. It probably also 
         * saves a picowatt or two */

        /* Turn off preemphasis */
        falcon_mdio_write ( efab, MDIO_MMD_PHYXS, TXC_ALRGS_ATXPRE0,
                            TXC_ATXPRE_NONE );
        falcon_mdio_write ( efab, MDIO_MMD_PHYXS, TXC_ALRGS_ATXPRE1,
                            TXC_ATXPRE_NONE );

        /* Turn down the amplitude */
        falcon_mdio_write ( efab, MDIO_MMD_PHYXS, TXC_ALRGS_ATXAMP0,
                            TXC_ATXAMP_0820_BOTH );
        falcon_mdio_write ( efab, MDIO_MMD_PHYXS, TXC_ALRGS_ATXAMP1,
                            TXC_ATXAMP_0820_BOTH );

        /* Set the line side amplitude and preemphasis to the databook
         * defaults as an erratum causes them to be 0 on at least some
         * PHY rev.s */
        falcon_mdio_write ( efab, MDIO_MMD_PMAPMD, TXC_ALRGS_ATXPRE0,
                            TXC_ATXPRE_DEFAULT );
        falcon_mdio_write ( efab, MDIO_MMD_PMAPMD, TXC_ALRGS_ATXPRE1,
                            TXC_ATXPRE_DEFAULT );
        falcon_mdio_write ( efab, MDIO_MMD_PMAPMD, TXC_ALRGS_ATXAMP0,
                            TXC_ATXAMP_DEFAULT );
        falcon_mdio_write ( efab, MDIO_MMD_PMAPMD, TXC_ALRGS_ATXAMP1,
                            TXC_ATXAMP_DEFAULT );

        rc = falcon_txc_logic_reset ( efab );
        if ( rc )
                goto fail3;

        return 0;

fail3:
fail2:
fail1:
        return rc;
}

static struct efab_phy_operations falcon_txc_phy_ops = {
        .init                   = falcon_txc_phy_init,
        .mmds                   = TXC_REQUIRED_DEVS,
};

/*******************************************************************************
 *
 *
 * tenxpress
 *
 *
 *******************************************************************************/


#define TENXPRESS_REQUIRED_DEVS ( MDIO_MMDREG_DEVS0_PMAPMD |    \
                                  MDIO_MMDREG_DEVS0_PCS    |    \
                                  MDIO_MMDREG_DEVS0_PHYXS )

#define PCS_TEST_SELECT_REG 0xd807      /* PRM 10.5.8 */
#define CLK312_EN_LBN 3
#define CLK312_EN_WIDTH 1

#define PCS_CLOCK_CTRL_REG 0xd801
#define PLL312_RST_N_LBN 2

/* Special Software reset register */
#define PMA_PMD_EXT_CTRL_REG 49152
#define PMA_PMD_EXT_SSR_LBN 15

/* Boot status register */
#define PCS_BOOT_STATUS_REG     0xd000
#define PCS_BOOT_FATAL_ERR_LBN  0
#define PCS_BOOT_PROGRESS_LBN   1
#define PCS_BOOT_PROGRESS_WIDTH 2
#define PCS_BOOT_COMPLETE_LBN   3

#define PCS_SOFT_RST2_REG 0xd806
#define SERDES_RST_N_LBN 13
#define XGXS_RST_N_LBN 12

static int
falcon_tenxpress_check_c11 ( struct efab_nic *efab )
{
        int count;
        uint32_t boot_stat;

        /* Check that the C11 CPU has booted */
        for (count=0; count<10; count++) {
                boot_stat = falcon_mdio_read ( efab, MDIO_MMD_PCS,
                                               PCS_BOOT_STATUS_REG );
                if ( boot_stat & ( 1 << PCS_BOOT_COMPLETE_LBN ) )
                        return 0;

                udelay(10);
        }

        EFAB_ERR ( "C11 failed to boot\n" );
        return -ETIMEDOUT;
}

static int
falcon_tenxpress_phy_init ( struct efab_nic *efab )
{
        int rc, reg;

        /* 10XPRESS is always 10000FD (at the moment) */
        efab->link_options = LPA_EF_10000FULL;

        /* Wait for the blocks to come out of reset */
        rc = mdio_clause45_wait_reset_mmds ( efab );
        if ( rc )
                goto fail1;

        rc = mdio_clause45_check_mmds ( efab );
        if ( rc )
                goto fail2;

        /* Turn on the clock  */
        reg = (1 << CLK312_EN_LBN);
        falcon_mdio_write ( efab, MDIO_MMD_PCS, PCS_TEST_SELECT_REG, reg);

        /* Wait 200ms for the PHY to boot */
        mdelay(200);

        rc = falcon_tenxpress_check_c11 ( efab );
        if ( rc )
                goto fail3;

        return 0;

fail3:
fail2:
fail1:
        return rc;
}

static struct efab_phy_operations falcon_tenxpress_phy_ops = {
        .init                   = falcon_tenxpress_phy_init,
        .mmds                   = TENXPRESS_REQUIRED_DEVS,
};

/*******************************************************************************
 *
 *
 * PM8358
 *
 *
 *******************************************************************************/

/* The PM8358 just presents a DTE XS */
#define PM8358_REQUIRED_DEVS (MDIO_MMDREG_DEVS0_DTEXS)

/* PHY-specific definitions */
/* Master ID and Global Performance Monitor Update */
#define PMC_MASTER_REG (0xd000)
/* Analog Tx Rx settings under software control */
#define PMC_MASTER_ANLG_CTRL (1<< 11)

/* Master Configuration register 2 */
#define PMC_MCONF2_REG  (0xd002)
/* Drive Tx off centre of data eye (1) vs. clock edge (0) */
#define PMC_MCONF2_TEDGE (1 << 2) 
/* Drive Rx off centre of data eye (1) vs. clock edge (0) */
#define PMC_MCONF2_REDGE (1 << 3)

/* Analog Rx settings */
#define PMC_ANALOG_RX_CFG0   (0xd025)
#define PMC_ANALOG_RX_CFG1   (0xd02d)
#define PMC_ANALOG_RX_CFG2   (0xd035)
#define PMC_ANALOG_RX_CFG3   (0xd03d)


#define PMC_ANALOG_RX_TERM     (1 << 15) /* Bit 15 of RX CFG: 0 for 100 ohms float,
                                            1 for 50 to 1.2V */
#define PMC_ANALOG_RX_EQ_MASK (3 << 8)
#define PMC_ANALOG_RX_EQ_NONE (0 << 8)
#define PMC_ANALOG_RX_EQ_HALF (1 << 8)
#define PMC_ANALOG_RX_EQ_FULL (2 << 8)
#define PMC_ANALOG_RX_EQ_RSVD (3 << 8)

static int
falcon_pm8358_phy_init ( struct efab_nic *efab )
{
        int rc, reg, i;

        /* This is a XAUI retimer part */
        efab->link_options = LPA_EF_10000FULL;

        rc = mdio_clause45_reset_mmd ( efab, MDIO_MMDREG_DEVS0_DTEXS );
        if ( rc )
                return rc;
        
        /* Enable software control of analogue settings */
        reg = falcon_mdio_read ( efab, MDIO_MMD_DTEXS,  PMC_MASTER_REG );
        reg |= PMC_MASTER_ANLG_CTRL;
        falcon_mdio_write ( efab, MDIO_MMD_DTEXS, PMC_MASTER_REG, reg );

        /* Turn rx eq on for all channels */
        for (i=0; i< 3; i++) {
                /* The analog CFG registers are evenly spaced 8 apart */
                uint16_t addr = PMC_ANALOG_RX_CFG0 + 8*i;
                reg = falcon_mdio_read ( efab, MDIO_MMD_DTEXS, addr );
                reg = ( reg & ~PMC_ANALOG_RX_EQ_MASK ) | PMC_ANALOG_RX_EQ_FULL;
                falcon_mdio_write ( efab, MDIO_MMD_DTEXS, addr, reg );
        }

        /* Set TEDGE, clear REDGE */
        reg = falcon_mdio_read ( efab, MDIO_MMD_DTEXS, PMC_MCONF2_REG );
        reg = ( reg & ~PMC_MCONF2_REDGE) | PMC_MCONF2_TEDGE;
        falcon_mdio_write ( efab, MDIO_MMD_DTEXS, PMC_MCONF2_REG, reg );

        return 0;
}

static struct efab_phy_operations falcon_pm8358_phy_ops = {
        .init                   = falcon_pm8358_phy_init,
        .mmds                   = PM8358_REQUIRED_DEVS,
};

/*******************************************************************************
 *
 *
 * SFE4001 support
 *
 *
 *******************************************************************************/

#define MAX_TEMP_THRESH 90

/* I2C Expander */
#define PCA9539 0x74

#define P0_IN 0x00
#define P0_OUT 0x02
#define P0_CONFIG 0x06

#define P0_EN_1V0X_LBN 0
#define P0_EN_1V0X_WIDTH 1
#define P0_EN_1V2_LBN 1
#define P0_EN_1V2_WIDTH 1
#define P0_EN_2V5_LBN 2
#define P0_EN_2V5_WIDTH 1
#define P0_EN_3V3X_LBN 3
#define P0_EN_3V3X_WIDTH 1
#define P0_EN_5V_LBN 4
#define P0_EN_5V_WIDTH 1
#define P0_X_TRST_LBN 6
#define P0_X_TRST_WIDTH 1

#define P1_IN 0x01
#define P1_CONFIG 0x07

#define P1_AFE_PWD_LBN 0
#define P1_AFE_PWD_WIDTH 1
#define P1_DSP_PWD25_LBN 1
#define P1_DSP_PWD25_WIDTH 1
#define P1_SPARE_LBN 4
#define P1_SPARE_WIDTH 4

/* Temperature Sensor */
#define MAX6647 0x4e

#define RSL     0x02
#define RLHN    0x05
#define WLHO    0x0b

static struct i2c_device i2c_pca9539 = {
        .dev_addr = PCA9539,
        .dev_addr_len = 1,
        .word_addr_len = 1,
};


static struct i2c_device i2c_max6647 = {
        .dev_addr = MAX6647,
        .dev_addr_len = 1,
        .word_addr_len = 1,
};

static int
sfe4001_init ( struct efab_nic *efab )
{
        struct i2c_interface *i2c = &efab->i2c_bb.i2c;
        efab_dword_t reg;
        uint8_t in, cfg, out;
        int count, rc;

        EFAB_LOG ( "Initialise SFE4001 board\n" );

        /* Ensure XGXS and XAUI SerDes are held in reset */
        EFAB_POPULATE_DWORD_7 ( reg,
                                FCN_XX_PWRDNA_EN, 1,
                                FCN_XX_PWRDNB_EN, 1,
                                FCN_XX_RSTPLLAB_EN, 1,
                                FCN_XX_RESETA_EN, 1,
                                FCN_XX_RESETB_EN, 1,
                                FCN_XX_RSTXGXSRX_EN, 1,
                                FCN_XX_RSTXGXSTX_EN, 1 );
        falcon_xmac_writel ( efab, &reg, FCN_XX_PWR_RST_REG_MAC);
        udelay(10);

        /* Set DSP over-temperature alert threshold */
        cfg = MAX_TEMP_THRESH;
        rc = i2c->write ( i2c, &i2c_max6647, WLHO, &cfg, EFAB_BYTE );
        if ( rc )
                goto fail1;

        /* Read it back and verify */
        rc = i2c->read ( i2c, &i2c_max6647, RLHN, &in, EFAB_BYTE );
        if ( rc )
                goto fail2;

        if ( in != MAX_TEMP_THRESH ) {
                EFAB_ERR ( "Unable to verify MAX6647 limit (requested=%d "
                           "confirmed=%d)\n", cfg, in );
                rc = -EIO;
                goto fail3;
        }

        /* Clear any previous over-temperature alert */
        rc = i2c->read ( i2c, &i2c_max6647, RSL, &in, EFAB_BYTE );
        if ( rc )
                goto fail4;

        /* Enable port 0 and 1 outputs on IO expander */
        cfg = 0x00;
        rc = i2c->write ( i2c, &i2c_pca9539, P0_CONFIG, &cfg, EFAB_BYTE );
        if ( rc )
                goto fail5;
        cfg = 0xff & ~(1 << P1_SPARE_LBN);
        rc = i2c->write ( i2c, &i2c_pca9539, P1_CONFIG, &cfg, EFAB_BYTE );
        if ( rc )
                goto fail6;

        /* Turn all power off then wait 1 sec. This ensures PHY is reset */
        out = 0xff & ~((0 << P0_EN_1V2_LBN) | (0 << P0_EN_2V5_LBN) |
                       (0 << P0_EN_3V3X_LBN) | (0 << P0_EN_5V_LBN) |
                       (0 << P0_EN_1V0X_LBN));

        rc = i2c->write ( i2c, &i2c_pca9539, P0_OUT, &out, EFAB_BYTE );
        if ( rc )
                goto fail7;

        mdelay(1000);

        for (count=0; count<20; count++) {
                /* Turn on 1.2V, 2.5V, 3.3V and 5V power rails */
                out = 0xff & ~( (1 << P0_EN_1V2_LBN)  | (1 << P0_EN_2V5_LBN) |
                                (1 << P0_EN_3V3X_LBN) | (1 << P0_EN_5V_LBN)  | 
                                (1 << P0_X_TRST_LBN) );

                rc = i2c->write ( i2c, &i2c_pca9539, P0_OUT, &out, EFAB_BYTE );
                if ( rc )
                        goto fail8;

                mdelay ( 10 );
                
                /* Turn on the 1V power rail */
                out  &= ~( 1 << P0_EN_1V0X_LBN );
                rc = i2c->write ( i2c, &i2c_pca9539, P0_OUT, &out, EFAB_BYTE );
                if ( rc )
                        goto fail9;

                EFAB_LOG ( "Waiting for power...(attempt %d)\n", count);
                mdelay ( 1000 );

                /* Check DSP is powered */
                rc = i2c->read ( i2c, &i2c_pca9539, P1_IN, &in, EFAB_BYTE );
                if ( rc )
                        goto fail10;

                if ( in & ( 1 << P1_AFE_PWD_LBN ) )
                        return 0;
        }

        rc = -ETIMEDOUT;

fail10:
fail9:
fail8:
fail7:
        /* Turn off power rails */
        out = 0xff;
        (void) i2c->write ( i2c, &i2c_pca9539, P0_OUT, &out, EFAB_BYTE );
        /* Disable port 1 outputs on IO expander */
        out = 0xff;
        (void) i2c->write ( i2c, &i2c_pca9539, P1_CONFIG, &out, EFAB_BYTE );
fail6:
        /* Disable port 0 outputs */
        out = 0xff;
        (void) i2c->write ( i2c, &i2c_pca9539, P1_CONFIG, &out, EFAB_BYTE );
fail5:
fail4:
fail3:
fail2:
fail1:
        EFAB_ERR ( "Failed initialising SFE4001 board\n" );
        return rc;
}

static void
sfe4001_fini ( struct efab_nic *efab )
{
        struct i2c_interface *i2c = &efab->i2c_bb.i2c;
        uint8_t in, cfg, out;

        EFAB_ERR ( "Turning off SFE4001\n" );

        /* Turn off all power rails */
        out = 0xff;
        (void) i2c->write ( i2c, &i2c_pca9539, P0_OUT, &out, EFAB_BYTE );

        /* Disable port 1 outputs on IO expander */
        cfg = 0xff;
        (void) i2c->write ( i2c, &i2c_pca9539, P1_CONFIG, &cfg, EFAB_BYTE );

        /* Disable port 0 outputs on IO expander */
        cfg = 0xff;
        (void) i2c->write ( i2c, &i2c_pca9539, P0_CONFIG, &cfg, EFAB_BYTE );

        /* Clear any over-temperature alert */
        (void) i2c->read ( i2c, &i2c_max6647, RSL, &in, EFAB_BYTE );
}

struct efab_board_operations sfe4001_ops = {
        .init           = sfe4001_init,
        .fini           = sfe4001_fini,
};

static int sfe4002_init ( struct efab_nic *efab __attribute__((unused)) )
{
        return 0;
}
static void sfe4002_fini ( struct efab_nic *efab __attribute__((unused)) )
{
}

struct efab_board_operations sfe4002_ops = {
        .init           = sfe4002_init,
        .fini           = sfe4002_fini,
};

static int sfe4003_init ( struct efab_nic *efab __attribute__((unused)) )
{
        return 0;
}
static void sfe4003_fini ( struct efab_nic *efab __attribute__((unused)) )
{
}

struct efab_board_operations sfe4003_ops = {
        .init           = sfe4003_init,
        .fini           = sfe4003_fini,
};

/*******************************************************************************
 *
 *
 * Hardware initialisation
 *
 *
 *******************************************************************************/ 

static void
falcon_free_special_buffer ( void *p )
{
        /* We don't bother cleaning up the buffer table entries -
         * we're hardly limited */
        free_dma ( p, EFAB_BUF_ALIGN );
}

static void*
falcon_alloc_special_buffer ( struct efab_nic *efab, int bytes,
                              struct efab_special_buffer *entry )
{
        void* buffer;
        int remaining;
        efab_qword_t buf_desc;
        unsigned long dma_addr;

        /* Allocate the buffer, aligned on a buffer address boundary */
        buffer = malloc_dma ( bytes, EFAB_BUF_ALIGN );
        if ( ! buffer )
                return NULL;

        /* Push buffer table entries to back the buffer */
        entry->id = efab->buffer_head;
        entry->dma_addr = dma_addr = virt_to_bus ( buffer );
        assert ( ( dma_addr & ( EFAB_BUF_ALIGN - 1 ) ) == 0 );

        remaining = bytes;
        while ( remaining > 0 ) {
                EFAB_POPULATE_QWORD_3 ( buf_desc,
                                        FCN_IP_DAT_BUF_SIZE, FCN_IP_DAT_BUF_SIZE_4K,
                                        FCN_BUF_ADR_FBUF, ( dma_addr >> 12 ),
                                        FCN_BUF_OWNER_ID_FBUF, 0 );

                falcon_write_sram ( efab, &buf_desc, efab->buffer_head );

                ++efab->buffer_head;
                dma_addr += EFAB_BUF_ALIGN;
                remaining -= EFAB_BUF_ALIGN;
        }

        EFAB_TRACE ( "Allocated 0x%x bytes at %p backed by buffer table "
                     "entries 0x%x..0x%x\n", bytes, buffer, entry->id,
                     efab->buffer_head - 1 );

        return buffer;
}

static void
clear_b0_fpga_memories ( struct efab_nic *efab)
{
        efab_oword_t blanko, temp;
        efab_dword_t blankd;
        int offset; 

        EFAB_ZERO_OWORD ( blanko );
        EFAB_ZERO_DWORD ( blankd );

        /* Clear the address region register */
        EFAB_POPULATE_OWORD_4 ( temp,
                                FCN_ADR_REGION0, 0,
                                FCN_ADR_REGION1, ( 1 << 16 ),
                                FCN_ADR_REGION2, ( 2 << 16 ),
                                FCN_ADR_REGION3, ( 3 << 16 ) );
        falcon_write ( efab, &temp, FCN_ADR_REGION_REG_KER );
        
        EFAB_TRACE ( "Clearing filter and RSS tables\n" );

        for ( offset = FCN_RX_FILTER_TBL0 ;
              offset < FCN_RX_RSS_INDIR_TBL_B0+0x800 ;
              offset += 0x10 ) {
                falcon_write ( efab, &blanko, offset );
        }

        EFAB_TRACE ( "Wiping buffer tables\n" );

        /* Notice the 8 byte access mode */
        for ( offset = 0x2800000 ;
              offset < 0x3000000 ;
              offset += 0x8) {
                _falcon_writel ( efab, 0, offset );
                _falcon_writel ( efab, 0, offset + 4 );
                wmb();
        }
}

static int
falcon_reset ( struct efab_nic *efab )
{
        efab_oword_t glb_ctl_reg_ker;

        /* Initiate software reset */
        EFAB_POPULATE_OWORD_6 ( glb_ctl_reg_ker,
                                FCN_PCIE_CORE_RST_CTL, EXCLUDE_FROM_RESET,
                                FCN_PCIE_NSTCK_RST_CTL, EXCLUDE_FROM_RESET,
                                FCN_PCIE_SD_RST_CTL, EXCLUDE_FROM_RESET,
                                FCN_EE_RST_CTL, EXCLUDE_FROM_RESET,
                                FCN_EXT_PHY_RST_DUR, 0x7, /* 10ms */
                                FCN_SWRST, 1 );

        falcon_write ( efab, &glb_ctl_reg_ker, FCN_GLB_CTL_REG_KER );

        /* Allow 50ms for reset */
        mdelay ( 50 );

        /* Check for device reset complete */
        falcon_read ( efab, &glb_ctl_reg_ker, FCN_GLB_CTL_REG_KER );
        if ( EFAB_OWORD_FIELD ( glb_ctl_reg_ker, FCN_SWRST ) != 0 ) {
                EFAB_ERR ( "Reset failed\n" );
                return -ETIMEDOUT;
        }

        if ( ( efab->pci_revision == FALCON_REV_B0 ) && !efab->is_asic ) {
                clear_b0_fpga_memories ( efab );
        }

        return 0;
}

/** Offset of MAC address within EEPROM or Flash */
#define FALCON_MAC_ADDRESS_OFFSET 0x310

/*
 * Falcon EEPROM structure
 */
#define SF_NV_CONFIG_BASE 0x300
#define SF_NV_CONFIG_EXTRA 0xA0

struct falcon_nv_config_ver2 {
        uint16_t nports;
        uint8_t  port0_phy_addr;
        uint8_t  port0_phy_type;
        uint8_t  port1_phy_addr;
        uint8_t  port1_phy_type;
        uint16_t asic_sub_revision;
        uint16_t board_revision;
        uint8_t mac_location;
};

struct falcon_nv_extra {
        uint16_t magicnumber;
        uint16_t structure_version;
        uint16_t checksum;
        union {
                struct falcon_nv_config_ver2 ver2;
        } ver_specific;
};

#define BOARD_TYPE(_rev) (_rev >> 8)

static void
falcon_probe_nic_variant ( struct efab_nic *efab, struct pci_device *pci )
{
        efab_oword_t altera_build, nic_stat;
        int is_pcie, fpga_version;
        uint8_t revision;

        /* PCI revision */
        pci_read_config_byte ( pci, PCI_CLASS_REVISION, &revision );
        efab->pci_revision = revision;

        /* Asic vs FPGA */
        falcon_read ( efab, &altera_build, FCN_ALTERA_BUILD_REG_KER );
        fpga_version = EFAB_OWORD_FIELD ( altera_build, FCN_VER_ALL );
        efab->is_asic = (fpga_version == 0);

        /* MAC and PCI type */
        falcon_read ( efab, &nic_stat, FCN_NIC_STAT_REG );
        if ( efab->pci_revision == FALCON_REV_B0 ) {
                is_pcie = 1;
                efab->phy_10g = EFAB_OWORD_FIELD ( nic_stat, FCN_STRAP_10G );
        }
        else if ( efab->is_asic ) {
                is_pcie = EFAB_OWORD_FIELD ( nic_stat, FCN_STRAP_PCIE );
                efab->phy_10g = EFAB_OWORD_FIELD ( nic_stat, FCN_STRAP_10G );
        }
        else {
                int minor = EFAB_OWORD_FIELD ( altera_build,  FCN_VER_MINOR );
                is_pcie = 0;
                efab->phy_10g = ( minor == 0x14 );
        }
}

static void
falcon_init_spi_device ( struct efab_nic *efab, struct spi_device *spi )
{
        /* Falcon's SPI interface only supports reads/writes of up to 16 bytes.
         * Reduce the nvs block size down to satisfy this - which means callers
         * should use the nvs_* functions rather than spi_*. */
        if ( spi->nvs.block_size > FALCON_SPI_MAX_LEN )
                spi->nvs.block_size = FALCON_SPI_MAX_LEN;

        spi->bus = &efab->spi_bus;
        efab->spi = spi;
}

static int
falcon_probe_spi ( struct efab_nic *efab )
{
        efab_oword_t nic_stat, gpio_ctl, ee_vpd_cfg;
        int has_flash, has_eeprom, ad9bit;

        falcon_read ( efab, &nic_stat, FCN_NIC_STAT_REG );
        falcon_read ( efab, &gpio_ctl, FCN_GPIO_CTL_REG_KER );
        falcon_read ( efab, &ee_vpd_cfg, FCN_EE_VPD_CFG_REG );

        /* determine if FLASH / EEPROM is present */
        if ( ( efab->pci_revision >= FALCON_REV_B0 ) || efab->is_asic ) {
                has_flash = EFAB_OWORD_FIELD ( nic_stat, FCN_SF_PRST );
                has_eeprom = EFAB_OWORD_FIELD ( nic_stat, FCN_EE_PRST );
        } else {
                has_flash = EFAB_OWORD_FIELD ( gpio_ctl, FCN_FLASH_PRESENT );
                has_eeprom = EFAB_OWORD_FIELD ( gpio_ctl, FCN_EEPROM_PRESENT );
        }
        ad9bit = EFAB_OWORD_FIELD ( ee_vpd_cfg, FCN_EE_VPD_EN_AD9_MODE );

        /* Configure the SPI and I2C bus */
        efab->spi_bus.rw = falcon_spi_rw;
        init_i2c_bit_basher ( &efab->i2c_bb, &falcon_i2c_bit_ops );

        /* Configure the EEPROM SPI device. Generally, an Atmel 25040
         * (or similar) is used, but this is only possible if there is also
         * a flash device present to store the boot-time chip configuration.
         */
        if ( has_eeprom ) {
                if ( has_flash && ad9bit )
                        init_at25040 ( &efab->spi_eeprom );
                else
                        init_mc25xx640 ( &efab->spi_eeprom );
                falcon_init_spi_device ( efab, &efab->spi_eeprom );
        }

        /* Configure the FLASH SPI device */
        if ( has_flash ) {
                init_at25f1024 ( &efab->spi_flash );
                falcon_init_spi_device ( efab, &efab->spi_flash );
        }

        EFAB_LOG ( "flash is %s, EEPROM is %s%s\n",
                   ( has_flash ? "present" : "absent" ),
                   ( has_eeprom ? "present " : "absent" ),
                   ( has_eeprom ? (ad9bit ? "(9bit)" : "(16bit)") : "") );

        /* The device MUST have flash or eeprom */
        if ( ! efab->spi ) {
                EFAB_ERR ( "Device appears to have no flash or eeprom\n" );
                return -EIO;
        }

        /* If the device has EEPROM attached, then advertise NVO space */
        if ( has_eeprom )
                nvo_init ( &efab->nvo, &efab->spi_eeprom.nvs, falcon_nvo_fragments,
                           &efab->netdev->refcnt );

        return 0;
}

static int
falcon_probe_nvram ( struct efab_nic *efab )
{
        struct nvs_device *nvs = &efab->spi->nvs;
        struct falcon_nv_extra nv;
        int rc, board_revision;

        /* Read the MAC address */
        rc = nvs_read ( nvs, FALCON_MAC_ADDRESS_OFFSET,
                        efab->mac_addr, ETH_ALEN );
        if ( rc )
                return rc;

        /* Poke through the NVRAM structure for the PHY type. */
        rc = nvs_read ( nvs, SF_NV_CONFIG_BASE + SF_NV_CONFIG_EXTRA,
                        &nv, sizeof ( nv ) );
        if ( rc )
                return rc;

        /* Handle each supported NVRAM version */
        if ( ( le16_to_cpu ( nv.magicnumber ) == FCN_NV_MAGIC_NUMBER ) &&
             ( le16_to_cpu ( nv.structure_version ) >= 2 ) ) {
                struct falcon_nv_config_ver2* ver2 = &nv.ver_specific.ver2;
                
                /* Get the PHY type */
                efab->phy_addr = le16_to_cpu ( ver2->port0_phy_addr );
                efab->phy_type = le16_to_cpu ( ver2->port0_phy_type );
                board_revision = le16_to_cpu ( ver2->board_revision );
        }
        else {
                EFAB_ERR ( "NVram is not recognised\n" );
                return -EINVAL;
        }

        efab->board_type = BOARD_TYPE ( board_revision );
        
        EFAB_TRACE ( "Falcon board %d phy %d @ addr %d\n",
                     efab->board_type, efab->phy_type, efab->phy_addr );

        /* Patch in the board operations */
        switch ( efab->board_type ) {
        case EFAB_BOARD_SFE4001:
                efab->board_op = &sfe4001_ops;
                break;
        case EFAB_BOARD_SFE4002:
                efab->board_op = &sfe4002_ops;
                break;
        case EFAB_BOARD_SFE4003:
                efab->board_op = &sfe4003_ops;
                break;
        default:
                EFAB_ERR ( "Unrecognised board type\n" );
                return -EINVAL;
        }

        /* Patch in MAC operations */
        if ( efab->phy_10g )
                efab->mac_op = &falcon_xmac_operations;
        else
                efab->mac_op = &falcon_gmac_operations;

        /* Hook in the PHY ops */
        switch ( efab->phy_type ) {
        case PHY_TYPE_10XPRESS:
                efab->phy_op = &falcon_tenxpress_phy_ops;
                break;
        case PHY_TYPE_CX4:
                efab->phy_op = &falcon_xaui_phy_ops;
                break;
        case PHY_TYPE_XFP:
                efab->phy_op = &falcon_xfp_phy_ops;
                break;
        case PHY_TYPE_CX4_RTMR:
                efab->phy_op = &falcon_txc_phy_ops;
                break;
        case PHY_TYPE_PM8358:
                efab->phy_op = &falcon_pm8358_phy_ops;
                break;
        case PHY_TYPE_1GIG_ALASKA:
                efab->phy_op = &falcon_alaska_phy_ops;
                break;
        default:
                EFAB_ERR ( "Unknown PHY type: %d\n", efab->phy_type );
                return -EINVAL;
        }

        return 0;
}

static int
falcon_init_sram ( struct efab_nic *efab )
{
        efab_oword_t reg;
        int count;

        /* use card in internal SRAM mode */
        falcon_read ( efab, &reg, FCN_NIC_STAT_REG );
        EFAB_SET_OWORD_FIELD ( reg, FCN_ONCHIP_SRAM, 1 );
        falcon_write ( efab, &reg, FCN_NIC_STAT_REG );

        /* Deactivate any external SRAM that might be present */
        EFAB_POPULATE_OWORD_2 ( reg, 
                                FCN_GPIO1_OEN, 1,
                                FCN_GPIO1_OUT, 1 );
        falcon_write ( efab, &reg, FCN_GPIO_CTL_REG_KER );

        /* Initiate SRAM reset */
        EFAB_POPULATE_OWORD_2 ( reg,
                                FCN_SRAM_OOB_BT_INIT_EN, 1,
                                FCN_SRM_NUM_BANKS_AND_BANK_SIZE, 0 );
        falcon_write ( efab, &reg, FCN_SRM_CFG_REG_KER );

        /* Wait for SRAM reset to complete */
        count = 0;
        do {
                /* SRAM reset is slow; expect around 16ms */
                mdelay ( 20 );

                /* Check for reset complete */
                falcon_read ( efab, &reg, FCN_SRM_CFG_REG_KER );
                if ( !EFAB_OWORD_FIELD ( reg, FCN_SRAM_OOB_BT_INIT_EN ) )
                        return 0;
        } while (++count < 20); /* wait upto 0.4 sec */

        EFAB_ERR ( "timed out waiting for SRAM reset\n");
        return -ETIMEDOUT;
}

static void
falcon_setup_nic ( struct efab_nic *efab )
{
        efab_dword_t timer_cmd;
        efab_oword_t reg;
        int tx_fc, xoff_thresh, xon_thresh;

        /* bug5129: Clear the parity enables on the TX data fifos as 
         * they produce false parity errors because of timing issues 
         */
        falcon_read ( efab, &reg, FCN_SPARE_REG_KER );
        EFAB_SET_OWORD_FIELD ( reg, FCN_MEM_PERR_EN_TX_DATA, 0 );
        falcon_write ( efab, &reg, FCN_SPARE_REG_KER );
        
        /* Set up TX and RX descriptor caches in SRAM */
        EFAB_POPULATE_OWORD_1 ( reg, FCN_SRM_TX_DC_BASE_ADR, 0x130000 );
        falcon_write ( efab, &reg, FCN_SRM_TX_DC_CFG_REG_KER );
        EFAB_POPULATE_OWORD_1 ( reg, FCN_TX_DC_SIZE, 1 /* 16 descriptors */ );
        falcon_write ( efab, &reg, FCN_TX_DC_CFG_REG_KER );
        EFAB_POPULATE_OWORD_1 ( reg, FCN_SRM_RX_DC_BASE_ADR, 0x100000 );
        falcon_write ( efab, &reg, FCN_SRM_RX_DC_CFG_REG_KER );
        EFAB_POPULATE_OWORD_1 ( reg, FCN_RX_DC_SIZE, 2 /* 32 descriptors */ );
        falcon_write ( efab, &reg, FCN_RX_DC_CFG_REG_KER );
        
        /* Set number of RSS CPUs
         * bug7244: Increase filter depth to reduce RX_RESET likelyhood
         */
        EFAB_POPULATE_OWORD_5 ( reg,
                                FCN_NUM_KER, 0,
                                FCN_UDP_FULL_SRCH_LIMIT, 8,
                                FCN_UDP_WILD_SRCH_LIMIT, 8,
                                FCN_TCP_WILD_SRCH_LIMIT, 8,
                                FCN_TCP_FULL_SRCH_LIMIT, 8);
        falcon_write ( efab, &reg, FCN_RX_FILTER_CTL_REG_KER );
        udelay ( 1000 );

        /* Setup RX.  Wait for descriptor is broken and must
         * be disabled.  RXDP recovery shouldn't be needed, but is.
         * disable ISCSI parsing because we don't need it
         */
        falcon_read ( efab, &reg, FCN_RX_SELF_RST_REG_KER );
        EFAB_SET_OWORD_FIELD ( reg, FCN_RX_NODESC_WAIT_DIS, 1 );
        EFAB_SET_OWORD_FIELD ( reg, FCN_RX_RECOVERY_EN, 1 );
        EFAB_SET_OWORD_FIELD ( reg, FCN_RX_ISCSI_DIS, 1 );
        falcon_write ( efab, &reg, FCN_RX_SELF_RST_REG_KER );
        
        /* Determine recommended flow control settings. *
         * Flow control is qualified on B0 and A1/1G, not on A1/10G */
        if ( efab->pci_revision == FALCON_REV_B0 ) {
                tx_fc = 1;
                xoff_thresh = 54272;  /* ~80Kb - 3*max MTU */
                xon_thresh = 27648; /* ~3*max MTU */
        }
        else if ( !efab->phy_10g ) {
                tx_fc = 1;
                xoff_thresh = 2048;
                xon_thresh = 512;
        }
        else {
                tx_fc = xoff_thresh = xon_thresh = 0;
        }

        /* Setup TX and RX */
        falcon_read ( efab, &reg, FCN_TX_CFG2_REG_KER );
        EFAB_SET_OWORD_FIELD ( reg, FCN_TX_DIS_NON_IP_EV, 1 );
        falcon_write ( efab, &reg, FCN_TX_CFG2_REG_KER );

        falcon_read ( efab, &reg, FCN_RX_CFG_REG_KER );
        EFAB_SET_OWORD_FIELD_VER ( efab, reg, FCN_RX_USR_BUF_SIZE,
                                   (3*4096) / 32 );
        if ( efab->pci_revision == FALCON_REV_B0)
                EFAB_SET_OWORD_FIELD ( reg, FCN_RX_INGR_EN_B0, 1 );
        EFAB_SET_OWORD_FIELD_VER ( efab, reg, FCN_RX_XON_MAC_TH,
                                   xon_thresh / 256);
        EFAB_SET_OWORD_FIELD_VER ( efab, reg, FCN_RX_XOFF_MAC_TH,
                                   xoff_thresh / 256);
        EFAB_SET_OWORD_FIELD_VER ( efab, reg, FCN_RX_XOFF_MAC_EN, tx_fc);
        falcon_write ( efab, &reg, FCN_RX_CFG_REG_KER );

        /* Set timer register */
        EFAB_POPULATE_DWORD_2 ( timer_cmd,
                                FCN_TIMER_MODE, FCN_TIMER_MODE_DIS,
                                FCN_TIMER_VAL, 0 );
        falcon_writel ( efab, &timer_cmd, FCN_TIMER_CMD_REG_KER );
}

static void
falcon_init_resources ( struct efab_nic *efab )
{
        struct efab_ev_queue *ev_queue = &efab->ev_queue;
        struct efab_rx_queue *rx_queue = &efab->rx_queue;
        struct efab_tx_queue *tx_queue = &efab->tx_queue;

        efab_oword_t reg;
        int jumbo;

        /* Initialise the ptrs */
        tx_queue->read_ptr = tx_queue->write_ptr = 0;
        rx_queue->read_ptr = rx_queue->write_ptr = 0;
        ev_queue->read_ptr = 0;

        /* Push the event queue to the hardware */
        EFAB_POPULATE_OWORD_3 ( reg,
                                FCN_EVQ_EN, 1,
                                FCN_EVQ_SIZE, FQS(FCN_EVQ, EFAB_EVQ_SIZE),
                                FCN_EVQ_BUF_BASE_ID, ev_queue->entry.id );
        falcon_write ( efab, &reg, 
                       FCN_REVISION_REG ( efab, FCN_EVQ_PTR_TBL_KER ) );
        
        /* Push the tx queue to the hardware */
        EFAB_POPULATE_OWORD_8 ( reg,
                                FCN_TX_DESCQ_EN, 1,
                                FCN_TX_ISCSI_DDIG_EN, 0,
                                FCN_TX_ISCSI_DDIG_EN, 0,
                                FCN_TX_DESCQ_BUF_BASE_ID, tx_queue->entry.id,
                                FCN_TX_DESCQ_EVQ_ID, 0,
                                FCN_TX_DESCQ_SIZE, FQS(FCN_TX_DESCQ, EFAB_TXD_SIZE),
                                FCN_TX_DESCQ_TYPE, 0 /* kernel queue */,
                                FCN_TX_NON_IP_DROP_DIS_B0, 1 );
        falcon_write ( efab, &reg, 
                       FCN_REVISION_REG ( efab, FCN_TX_DESC_PTR_TBL_KER ) );
        
        /* Push the rx queue to the hardware */
        jumbo = ( efab->pci_revision == FALCON_REV_B0 ) ? 0 : 1;
        EFAB_POPULATE_OWORD_8 ( reg,
                                FCN_RX_ISCSI_DDIG_EN, 0,
                                FCN_RX_ISCSI_HDIG_EN, 0,
                                FCN_RX_DESCQ_BUF_BASE_ID, rx_queue->entry.id,
                                FCN_RX_DESCQ_EVQ_ID, 0,
                                FCN_RX_DESCQ_SIZE, FQS(FCN_RX_DESCQ, EFAB_RXD_SIZE),
                                FCN_RX_DESCQ_TYPE, 0 /* kernel queue */,
                                FCN_RX_DESCQ_JUMBO, jumbo,
                                FCN_RX_DESCQ_EN, 1 );
        falcon_write ( efab, &reg,
                       FCN_REVISION_REG ( efab, FCN_RX_DESC_PTR_TBL_KER ) );

        /* Program INT_ADR_REG_KER */
        EFAB_POPULATE_OWORD_1 ( reg,
                                FCN_INT_ADR_KER, virt_to_bus ( &efab->int_ker ) );
        falcon_write ( efab, &reg, FCN_INT_ADR_REG_KER );

        /* Ack the event queue */
        falcon_eventq_read_ack ( efab, ev_queue );
}

static void
falcon_fini_resources ( struct efab_nic *efab )
{
        efab_oword_t cmd;
        
        /* Disable interrupts */
        falcon_interrupts ( efab, 0, 0 );

        /* Flush the dma queues */
        EFAB_POPULATE_OWORD_2 ( cmd,
                                FCN_TX_FLUSH_DESCQ_CMD, 1,
                                FCN_TX_FLUSH_DESCQ, 0 );
        falcon_write ( efab, &cmd, 
                       FCN_REVISION_REG ( efab, FCN_TX_DESC_PTR_TBL_KER ) );

        EFAB_POPULATE_OWORD_2 ( cmd,
                                FCN_RX_FLUSH_DESCQ_CMD, 1,
                                FCN_RX_FLUSH_DESCQ, 0 );
        falcon_write ( efab, &cmd,
                       FCN_REVISION_REG ( efab, FCN_RX_DESC_PTR_TBL_KER ) );

        mdelay ( 100 );

        /* Remove descriptor rings from card */
        EFAB_ZERO_OWORD ( cmd );
        falcon_write ( efab, &cmd, 
                       FCN_REVISION_REG ( efab, FCN_TX_DESC_PTR_TBL_KER ) );
        falcon_write ( efab, &cmd, 
                       FCN_REVISION_REG ( efab, FCN_RX_DESC_PTR_TBL_KER ) );
        falcon_write ( efab, &cmd, 
                       FCN_REVISION_REG ( efab, FCN_EVQ_PTR_TBL_KER ) );
}

/*******************************************************************************
 *
 *
 * Hardware rx path
 *
 *
 *******************************************************************************/

static void
falcon_build_rx_desc ( falcon_rx_desc_t *rxd, struct io_buffer *iob )
{
        EFAB_POPULATE_QWORD_2 ( *rxd,
                                FCN_RX_KER_BUF_SIZE, EFAB_RX_BUF_SIZE,
                                FCN_RX_KER_BUF_ADR, virt_to_bus ( iob->data ) );
}

static void
falcon_notify_rx_desc ( struct efab_nic *efab, struct efab_rx_queue *rx_queue )
{
        efab_dword_t reg;
        int ptr = rx_queue->write_ptr % EFAB_RXD_SIZE;

        EFAB_POPULATE_DWORD_1 ( reg, FCN_RX_DESC_WPTR_DWORD, ptr );
        falcon_writel ( efab, &reg, FCN_RX_DESC_UPD_REG_KER_DWORD );
}


/*******************************************************************************
 *
 *
 * Hardware tx path
 *
 *
 *******************************************************************************/

static void
falcon_build_tx_desc ( falcon_tx_desc_t *txd, struct io_buffer *iob )
{
        EFAB_POPULATE_QWORD_2 ( *txd,
                                FCN_TX_KER_BYTE_CNT, iob_len ( iob ),
                                FCN_TX_KER_BUF_ADR, virt_to_bus ( iob->data ) );
}

static void
falcon_notify_tx_desc ( struct efab_nic *efab,
                        struct efab_tx_queue *tx_queue )
{
        efab_dword_t reg;
        int ptr = tx_queue->write_ptr % EFAB_TXD_SIZE;

        EFAB_POPULATE_DWORD_1 ( reg, FCN_TX_DESC_WPTR_DWORD, ptr );
        falcon_writel ( efab, &reg, FCN_TX_DESC_UPD_REG_KER_DWORD );
}


/*******************************************************************************
 *
 *
 * Software receive interface
 *
 *
 *******************************************************************************/ 

static int
efab_fill_rx_queue ( struct efab_nic *efab,
                     struct efab_rx_queue *rx_queue )
{
        int fill_level = rx_queue->write_ptr - rx_queue->read_ptr;
        int space = EFAB_NUM_RX_DESC - fill_level - 1;
        int pushed = 0;

        while ( space ) {
                int buf_id = rx_queue->write_ptr % EFAB_NUM_RX_DESC;
                int desc_id = rx_queue->write_ptr % EFAB_RXD_SIZE;
                struct io_buffer *iob;
                falcon_rx_desc_t *rxd;

                assert ( rx_queue->buf[buf_id] == NULL );
                iob = alloc_iob ( EFAB_RX_BUF_SIZE );
                if ( !iob )
                        break;

                EFAB_TRACE ( "pushing rx_buf[%d] iob %p data %p\n",
                             buf_id, iob, iob->data );

                rx_queue->buf[buf_id] = iob;
                rxd = rx_queue->ring + desc_id;
                falcon_build_rx_desc ( rxd, iob );
                ++rx_queue->write_ptr;
                ++pushed;
                --space;
        }

        if ( pushed ) {
                /* Push the ptr to hardware */
                falcon_notify_rx_desc ( efab, rx_queue );

                fill_level = rx_queue->write_ptr - rx_queue->read_ptr;
                EFAB_TRACE ( "pushed %d rx buffers to fill level %d\n",
                             pushed, fill_level );
        }

        if ( fill_level == 0 )
                return -ENOMEM;
        return 0;
}
        
static void
efab_receive ( struct efab_nic *efab, unsigned int id, int len, int drop )
{
        struct efab_rx_queue *rx_queue = &efab->rx_queue;
        struct io_buffer *iob;
        unsigned int read_ptr = rx_queue->read_ptr % EFAB_RXD_SIZE;
        unsigned int buf_ptr = rx_queue->read_ptr % EFAB_NUM_RX_DESC;

        assert ( id == read_ptr );
        
        /* Pop this rx buffer out of the software ring */
        iob = rx_queue->buf[buf_ptr];
        rx_queue->buf[buf_ptr] = NULL;

        EFAB_TRACE ( "popping rx_buf[%d] iob %p data %p with %d bytes %s\n",
                     id, iob, iob->data, len, drop ? "bad" : "ok" );

        /* Pass the packet up if required */
        if ( drop )
                free_iob ( iob );
        else {
                iob_put ( iob, len );
                netdev_rx ( efab->netdev, iob );
        }

        ++rx_queue->read_ptr;
}

/*******************************************************************************
 *
 *
 * Software transmit interface
 *
 *
 *******************************************************************************/ 

static int
efab_transmit ( struct net_device *netdev, struct io_buffer *iob )
{
        struct efab_nic *efab = netdev_priv ( netdev );
        struct efab_tx_queue *tx_queue = &efab->tx_queue;
        int fill_level, space;
        falcon_tx_desc_t *txd;
        int buf_id;

        fill_level = tx_queue->write_ptr - tx_queue->read_ptr;
        space = EFAB_TXD_SIZE - fill_level - 1;
        if ( space < 1 )
                return -ENOBUFS;

        /* Save the iobuffer for later completion */
        buf_id = tx_queue->write_ptr % EFAB_TXD_SIZE;
        assert ( tx_queue->buf[buf_id] == NULL );
        tx_queue->buf[buf_id] = iob;

        EFAB_TRACE ( "tx_buf[%d] for iob %p data %p len %zd\n",
                     buf_id, iob, iob->data, iob_len ( iob ) );

        /* Form the descriptor, and push it to hardware */
        txd = tx_queue->ring + buf_id;
        falcon_build_tx_desc ( txd, iob );
        ++tx_queue->write_ptr;
        falcon_notify_tx_desc ( efab, tx_queue );

        return 0;
}

static int
efab_transmit_done ( struct efab_nic *efab, int id )
{
        struct efab_tx_queue *tx_queue = &efab->tx_queue;
        unsigned int read_ptr, stop;

        /* Complete all buffers from read_ptr up to and including id */
        read_ptr = tx_queue->read_ptr % EFAB_TXD_SIZE;
        stop = ( id + 1 ) % EFAB_TXD_SIZE;

        while ( read_ptr != stop ) {
                struct io_buffer *iob = tx_queue->buf[read_ptr];
                assert ( iob );

                /* Complete the tx buffer */
                if ( iob )
                        netdev_tx_complete ( efab->netdev, iob );
                tx_queue->buf[read_ptr] = NULL;
                
                ++tx_queue->read_ptr;
                read_ptr = tx_queue->read_ptr % EFAB_TXD_SIZE;
        }

        return 0;
}

/*******************************************************************************
 *
 *
 * Hardware event path
 *
 *
 *******************************************************************************/

static void
falcon_clear_interrupts ( struct efab_nic *efab )
{
        efab_dword_t reg;

        if ( efab->pci_revision == FALCON_REV_B0 ) {
                /* read the ISR */
                falcon_readl( efab, &reg, INT_ISR0_B0 );
        }
        else {
                /* write to the INT_ACK register */
                falcon_writel ( efab, 0, FCN_INT_ACK_KER_REG_A1 );
                mb();
                falcon_readl ( efab, &reg,
                               WORK_AROUND_BROKEN_PCI_READS_REG_KER_A1 );
        }
}

static void
falcon_handle_event ( struct efab_nic *efab, falcon_event_t *evt )
{
        int ev_code, desc_ptr, len, drop;

        /* Decode event */
        ev_code = EFAB_QWORD_FIELD ( *evt, FCN_EV_CODE );
        switch ( ev_code ) {
        case FCN_TX_IP_EV_DECODE:
                desc_ptr = EFAB_QWORD_FIELD ( *evt, FCN_TX_EV_DESC_PTR );
                efab_transmit_done ( efab, desc_ptr );
                break;
        
        case FCN_RX_IP_EV_DECODE:
                desc_ptr = EFAB_QWORD_FIELD ( *evt, FCN_RX_EV_DESC_PTR );
                len = EFAB_QWORD_FIELD ( *evt, FCN_RX_EV_BYTE_CNT );
                drop = !EFAB_QWORD_FIELD ( *evt, FCN_RX_EV_PKT_OK );

                efab_receive ( efab, desc_ptr, len, drop );
                break;

        default:
                EFAB_TRACE ( "Unknown event type %d\n", ev_code );
                break;
        }
}

/*******************************************************************************
 *
 *
 * Software (polling) interrupt handler
 *
 *
 *******************************************************************************/

static void
efab_poll ( struct net_device *netdev )
{
        struct efab_nic *efab = netdev_priv ( netdev );
        struct efab_ev_queue *ev_queue = &efab->ev_queue;
        struct efab_rx_queue *rx_queue = &efab->rx_queue;
        falcon_event_t *evt;

        /* Read the event queue by directly looking for events
         * (we don't even bother to read the eventq write ptr) */
        evt = ev_queue->ring + ev_queue->read_ptr;
        while ( falcon_event_present ( evt ) ) {
                
                EFAB_TRACE ( "Event at index 0x%x address %p is "
                             EFAB_QWORD_FMT "\n", ev_queue->read_ptr,
                             evt, EFAB_QWORD_VAL ( *evt ) );
                
                falcon_handle_event ( efab, evt );
                
                /* Clear the event */
                EFAB_SET_QWORD ( *evt );
        
                /* Move to the next event. We don't ack the event
                 * queue until the end */
                ev_queue->read_ptr = ( ( ev_queue->read_ptr + 1 ) %
                                       EFAB_EVQ_SIZE );
                evt = ev_queue->ring + ev_queue->read_ptr;
        }

        /* Push more buffers if needed */
        (void) efab_fill_rx_queue ( efab, rx_queue );

        /* Clear any pending interrupts */
        falcon_clear_interrupts ( efab );

        /* Ack the event queue */
        falcon_eventq_read_ack ( efab, ev_queue );
}

static void
efab_irq ( struct net_device *netdev, int enable )
{
        struct efab_nic *efab = netdev_priv ( netdev );
        struct efab_ev_queue *ev_queue = &efab->ev_queue;

        switch ( enable ) {
        case 0:
                falcon_interrupts ( efab, 0, 0 );
                break;
        case 1:
                falcon_interrupts ( efab, 1, 0 );
                falcon_eventq_read_ack ( efab, ev_queue );
                break;
        case 2:
                falcon_interrupts ( efab, 1, 1 );
                break;
        }
}

/*******************************************************************************
 *
 *
 * Software open/close
 *
 *
 *******************************************************************************/

static void
efab_free_resources ( struct efab_nic *efab )
{
        struct efab_ev_queue *ev_queue = &efab->ev_queue;
        struct efab_rx_queue *rx_queue = &efab->rx_queue;
        struct efab_tx_queue *tx_queue = &efab->tx_queue;
        int i;

        for ( i = 0; i < EFAB_NUM_RX_DESC; i++ ) {
                if ( rx_queue->buf[i] )
                        free_iob ( rx_queue->buf[i] );
        }

        for ( i = 0; i < EFAB_TXD_SIZE; i++ ) {
                if ( tx_queue->buf[i] )
                        netdev_tx_complete ( efab->netdev,  tx_queue->buf[i] );
        }

        if ( rx_queue->ring )
                falcon_free_special_buffer ( rx_queue->ring );

        if ( tx_queue->ring )
                falcon_free_special_buffer ( tx_queue->ring );

        if ( ev_queue->ring )
                falcon_free_special_buffer ( ev_queue->ring );

        memset ( rx_queue, 0, sizeof ( *rx_queue ) );
        memset ( tx_queue, 0, sizeof ( *tx_queue ) );
        memset ( ev_queue, 0, sizeof ( *ev_queue ) );

        /* Ensure subsequent buffer allocations start at id 0 */
        efab->buffer_head = 0;
}

static int
efab_alloc_resources ( struct efab_nic *efab )
{
        struct efab_ev_queue *ev_queue = &efab->ev_queue;
        struct efab_rx_queue *rx_queue = &efab->rx_queue;
        struct efab_tx_queue *tx_queue = &efab->tx_queue;
        size_t bytes;

        /* Allocate the hardware event queue */
        bytes = sizeof ( falcon_event_t ) * EFAB_TXD_SIZE;
        ev_queue->ring = falcon_alloc_special_buffer ( efab, bytes,
                                                       &ev_queue->entry );
        if ( !ev_queue->ring )
                goto fail1;

        /* Initialise the hardware event queue */
        memset ( ev_queue->ring, 0xff, bytes );

        /* Allocate the hardware tx queue */
        bytes = sizeof ( falcon_tx_desc_t ) * EFAB_TXD_SIZE;
        tx_queue->ring = falcon_alloc_special_buffer ( efab, bytes,
                                                       &tx_queue->entry );
        if ( ! tx_queue->ring )
                goto fail2;

        /* Allocate the hardware rx queue */
        bytes = sizeof ( falcon_rx_desc_t ) * EFAB_RXD_SIZE;
        rx_queue->ring = falcon_alloc_special_buffer ( efab, bytes,
                                                       &rx_queue->entry );
        if ( ! rx_queue->ring )
                goto fail3;

        return 0;

fail3:
        falcon_free_special_buffer ( tx_queue->ring );
        tx_queue->ring = NULL;
fail2:
        falcon_free_special_buffer ( ev_queue->ring );
        ev_queue->ring = NULL;
fail1:
        return -ENOMEM;
}

static int
efab_init_mac ( struct efab_nic *efab )
{
        int count, rc;

        /* This can take several seconds */
        EFAB_LOG ( "Waiting for link..\n" );
        for ( count=0; count<5; count++ ) {
                rc = efab->mac_op->init ( efab );
                if ( rc ) {
                        EFAB_ERR ( "Failed reinitialising MAC, error %s\n",
                                strerror ( rc ));
                        return rc;
                }

                /* Sleep for 2s to wait for the link to settle, either
                 * because we want to use it, or because we're about
                 * to reset the mac anyway
                 */
                sleep ( 2 );

                if ( ! efab->link_up ) {
                        EFAB_ERR ( "!\n" );
                        continue;
                }

                EFAB_LOG ( "\n%dMbps %s-duplex\n",
                           ( efab->link_options & LPA_EF_10000 ? 10000 :
                             ( efab->link_options & LPA_EF_1000 ? 1000 :
                               ( efab->link_options & LPA_100 ? 100 : 10 ) ) ),
                           ( efab->link_options & LPA_EF_DUPLEX ?
                             "full" : "half" ) );

                /* TODO: Move link state handling to the poll() routine */
                netdev_link_up ( efab->netdev );
                return 0;
        }

        EFAB_ERR ( "timed initialising MAC\n" );
        return -ETIMEDOUT;
}

static void
efab_close ( struct net_device *netdev )
{
        struct efab_nic *efab = netdev_priv ( netdev );

        falcon_fini_resources ( efab );
        efab_free_resources ( efab );
        efab->board_op->fini ( efab );
        falcon_reset ( efab );
}

static int
efab_open ( struct net_device *netdev )
{
        struct efab_nic *efab = netdev_priv ( netdev );
        struct efab_rx_queue *rx_queue = &efab->rx_queue;
        int rc;

        rc = falcon_reset ( efab );
        if ( rc )
                goto fail1;

        rc = efab->board_op->init ( efab );
        if ( rc )
                goto fail2;
        
        rc = falcon_init_sram ( efab );
        if ( rc )
                goto fail3;

        /* Configure descriptor caches before pushing hardware queues */
        falcon_setup_nic ( efab );

        rc = efab_alloc_resources ( efab );
        if ( rc )
                goto fail4;
        
        falcon_init_resources ( efab );

        /* Push rx buffers */
        rc = efab_fill_rx_queue ( efab, rx_queue );
        if ( rc )
                goto fail5;

        /* Try and bring the interface up */
        rc = efab_init_mac ( efab );
        if ( rc )
                goto fail6;

        return 0;

fail6:
fail5:
        efab_free_resources ( efab );
fail4:
fail3:
        efab->board_op->fini ( efab );
fail2:
        falcon_reset ( efab );
fail1:
        return rc;
}

static struct net_device_operations efab_operations = {
        .open           = efab_open,
        .close          = efab_close,
        .transmit       = efab_transmit,
        .poll           = efab_poll,
        .irq            = efab_irq,
};

static void
efab_remove ( struct pci_device *pci )
{
        struct net_device *netdev = pci_get_drvdata ( pci );
        struct efab_nic *efab = netdev_priv ( netdev );

        if ( efab->membase ) {
                falcon_reset ( efab );

                iounmap ( efab->membase );
                efab->membase = NULL;
        }

        if ( efab->nvo.nvs ) {
                unregister_nvo ( &efab->nvo );
                efab->nvo.nvs = NULL;
        }

        unregister_netdev ( netdev );
        netdev_nullify ( netdev );
        netdev_put ( netdev );
}

static int
efab_probe ( struct pci_device *pci,
             const struct pci_device_id *id )
{
        struct net_device *netdev;
        struct efab_nic *efab;
        unsigned long mmio_start, mmio_len;
        int rc;

        /* Create the network adapter */
        netdev = alloc_etherdev ( sizeof ( struct efab_nic ) );
        if ( ! netdev ) {
                rc = -ENOMEM;
                goto fail1;
        }

        /* Initialise the network adapter, and initialise private storage */
        netdev_init ( netdev, &efab_operations );
        pci_set_drvdata ( pci, netdev );
        netdev->dev = &pci->dev;

        efab = netdev_priv ( netdev );
        memset ( efab, 0, sizeof ( *efab ) );
        efab->netdev = netdev;

        /* Get iobase/membase */
        mmio_start = pci_bar_start ( pci, PCI_BASE_ADDRESS_2 );
        mmio_len = pci_bar_size ( pci, PCI_BASE_ADDRESS_2 );
        efab->membase = ioremap ( mmio_start, mmio_len );
        EFAB_TRACE ( "BAR of %lx bytes at phys %lx mapped at %p\n",
                     mmio_len, mmio_start, efab->membase );

        /* Enable the PCI device */
        adjust_pci_device ( pci );
        efab->iobase = pci->ioaddr & ~3;

        /* Determine the NIC variant */
        falcon_probe_nic_variant ( efab, pci );

        /* Read the SPI interface and determine the MAC address,
         * and the board and phy variant. Hook in the op tables */
        rc = falcon_probe_spi ( efab );
        if ( rc )
                goto fail2;
        rc = falcon_probe_nvram ( efab );
        if ( rc )
                goto fail3;

        memcpy ( netdev->hw_addr, efab->mac_addr, ETH_ALEN );

        netdev_link_up ( netdev );
        rc = register_netdev ( netdev );
        if ( rc )
                goto fail4;

        /* Advertise non-volatile storage */
        if ( efab->nvo.nvs ) {
                rc = register_nvo ( &efab->nvo, netdev_settings ( netdev ) );
                if ( rc )
                        goto fail5;
        }

        EFAB_LOG ( "Found %s EtherFabric %s %s revision %d\n", id->name,
                   efab->is_asic ? "ASIC" : "FPGA",
                   efab->phy_10g ? "10G" : "1G",
                   efab->pci_revision );

        return 0;

fail5:
        unregister_netdev ( netdev );
fail4:
fail3:
fail2:
        iounmap ( efab->membase );
        efab->membase = NULL;
        netdev_put ( netdev );
fail1:
        return rc;
}


static struct pci_device_id efab_nics[] = {
        PCI_ROM(0x1924, 0x0703, "falcon", "EtherFabric Falcon", 0),
        PCI_ROM(0x1924, 0x0710, "falconb0", "EtherFabric FalconB0", 0),
};

struct pci_driver etherfabric_driver __pci_driver = {
        .ids = efab_nics,
        .id_count = sizeof ( efab_nics ) / sizeof ( efab_nics[0] ),
        .probe = efab_probe,
        .remove = efab_remove,
};

/*
 * Local variables:
 *  c-basic-offset: 8
 *  c-indent-level: 8
 *  tab-width: 8
 * End:
 */