/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (c) 1997, 1998, 1999
 *      Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * 21143 and clone common register definitions.
 */

#define DC_BUSCTL               0x00    /* bus control */
#define DC_TXSTART              0x08    /* tx start demand */
#define DC_RXSTART              0x10    /* rx start demand */
#define DC_RXADDR               0x18    /* rx descriptor list start addr */
#define DC_TXADDR               0x20    /* tx descriptor list start addr */
#define DC_ISR                  0x28    /* interrupt status register */
#define DC_NETCFG               0x30    /* network config register */
#define DC_IMR                  0x38    /* interrupt mask */
#define DC_FRAMESDISCARDED      0x40    /* # of discarded frames */
#define DC_SIO                  0x48    /* MII and ROM/EEPROM access */
#define DC_ROM                  0x50    /* ROM programming address */
#define DC_TIMER                0x58    /* general timer */
#define DC_10BTSTAT             0x60    /* SIA status */
#define DC_SIARESET             0x68    /* SIA connectivity */
#define DC_10BTCTRL             0x70    /* SIA transmit and receive */
#define DC_WATCHDOG             0x78    /* SIA and general purpose port */
#define DC_SIAGP                0x78    /* SIA and general purpose port (X3201) */

/*
 * There are two general 'types' of MX chips that we need to be
 * concerned with. One is the original 98713, which has its internal
 * NWAY support controlled via the MDIO bits in the serial I/O
 * register. The other is everything else (from the 98713A on up),
 * which has its internal NWAY controlled via CSR13, CSR14 and CSR15,
 * just like the 21143. This type setting also governs which of the
 * 'magic' numbers we write to CSR16. The PNIC II falls into the
 * 98713A/98715/98715A/98725 category.
 */
#define DC_TYPE_98713           0x1
#define DC_TYPE_98713A          0x2
#define DC_TYPE_987x5           0x3

/* Other type of supported chips. */
#define DC_TYPE_21143           0x4     /* Intel 21143 */
#define DC_TYPE_ASIX            0x5     /* ASIX AX88140A/AX88141 */
#define DC_TYPE_AL981           0x6     /* ADMtek AL981 Comet */
#define DC_TYPE_AN983           0x7     /* ADMtek AN983 Centaur */
#define DC_TYPE_DM9102          0x8     /* Davicom DM9102 */
#define DC_TYPE_PNICII          0x9     /* 82c115 PNIC II */
#define DC_TYPE_PNIC            0xA     /* 82c168/82c169 PNIC I */
#define DC_TYPE_XIRCOM          0xB     /* Xircom X3201 */
#define DC_TYPE_CONEXANT        0xC     /* Conexant LANfinity RS7112 */
#define DC_TYPE_ULI_M5261       0xD     /* ALi/ULi M5261 */
#define DC_TYPE_ULI_M5263       0xE     /* ALi/ULi M5263 */

#define DC_IS_MACRONIX(x)                       \
        (x->dc_type == DC_TYPE_98713 ||         \
         x->dc_type == DC_TYPE_98713A ||        \
         x->dc_type == DC_TYPE_987x5)

#define DC_IS_ADMTEK(x)                         \
        (x->dc_type == DC_TYPE_AL981 ||         \
         x->dc_type == DC_TYPE_AN983)

#define DC_IS_ULI(x)                            \
        (x->dc_type == DC_TYPE_ULI_M5261 ||     \
         x->dc_type == DC_TYPE_ULI_M5263)

#define DC_IS_INTEL(x)          (x->dc_type == DC_TYPE_21143)
#define DC_IS_ASIX(x)           (x->dc_type == DC_TYPE_ASIX)
#define DC_IS_COMET(x)          (x->dc_type == DC_TYPE_AL981)
#define DC_IS_CENTAUR(x)        (x->dc_type == DC_TYPE_AN983)
#define DC_IS_DAVICOM(x)        (x->dc_type == DC_TYPE_DM9102)
#define DC_IS_PNICII(x)         (x->dc_type == DC_TYPE_PNICII)
#define DC_IS_PNIC(x)           (x->dc_type == DC_TYPE_PNIC)
#define DC_IS_XIRCOM(x)         (x->dc_type == DC_TYPE_XIRCOM)
#define DC_IS_CONEXANT(x)       (x->dc_type == DC_TYPE_CONEXANT)

/* MII/symbol mode port types */
#define DC_PMODE_MII            0x1
#define DC_PMODE_SYM            0x2
#define DC_PMODE_SIA            0x3

/*
 * Bus control bits.
 */
#define DC_BUSCTL_RESET         0x00000001
#define DC_BUSCTL_ARBITRATION   0x00000002
#define DC_BUSCTL_SKIPLEN       0x0000007C
#define DC_BUSCTL_BUF_BIGENDIAN 0x00000080
#define DC_BUSCTL_BURSTLEN      0x00003F00
#define DC_BUSCTL_CACHEALIGN    0x0000C000
#define DC_BUSCTL_TXPOLL        0x000E0000
#define DC_BUSCTL_DBO           0x00100000
#define DC_BUSCTL_MRME          0x00200000
#define DC_BUSCTL_MRLE          0x00800000
#define DC_BUSCTL_MWIE          0x01000000
#define DC_BUSCTL_ONNOW_ENB     0x04000000

#define DC_SKIPLEN_1LONG        0x00000004
#define DC_SKIPLEN_2LONG        0x00000008
#define DC_SKIPLEN_3LONG        0x00000010
#define DC_SKIPLEN_4LONG        0x00000020
#define DC_SKIPLEN_5LONG        0x00000040

#define DC_CACHEALIGN_NONE      0x00000000
#define DC_CACHEALIGN_8LONG     0x00004000
#define DC_CACHEALIGN_16LONG    0x00008000
#define DC_CACHEALIGN_32LONG    0x0000C000

#define DC_BURSTLEN_USECA       0x00000000
#define DC_BURSTLEN_1LONG       0x00000100
#define DC_BURSTLEN_2LONG       0x00000200
#define DC_BURSTLEN_4LONG       0x00000400
#define DC_BURSTLEN_8LONG       0x00000800
#define DC_BURSTLEN_16LONG      0x00001000
#define DC_BURSTLEN_32LONG      0x00002000

#define DC_TXPOLL_OFF           0x00000000
#define DC_TXPOLL_1             0x00020000
#define DC_TXPOLL_2             0x00040000
#define DC_TXPOLL_3             0x00060000
#define DC_TXPOLL_4             0x00080000
#define DC_TXPOLL_5             0x000A0000
#define DC_TXPOLL_6             0x000C0000
#define DC_TXPOLL_7             0x000E0000

/*
 * Interrupt status bits.
 */
#define DC_ISR_TX_OK            0x00000001
#define DC_ISR_TX_IDLE          0x00000002
#define DC_ISR_TX_NOBUF         0x00000004
#define DC_ISR_TX_JABBERTIMEO   0x00000008
#define DC_ISR_LINKGOOD         0x00000010
#define DC_ISR_TX_UNDERRUN      0x00000020
#define DC_ISR_RX_OK            0x00000040
#define DC_ISR_RX_NOBUF         0x00000080
#define DC_ISR_RX_READ          0x00000100
#define DC_ISR_RX_WATDOGTIMEO   0x00000200
#define DC_ISR_TX_EARLY         0x00000400
#define DC_ISR_TIMER_EXPIRED    0x00000800
#define DC_ISR_LINKFAIL         0x00001000
#define DC_ISR_BUS_ERR          0x00002000
#define DC_ISR_RX_EARLY         0x00004000
#define DC_ISR_ABNORMAL         0x00008000
#define DC_ISR_NORMAL           0x00010000
#define DC_ISR_RX_STATE         0x000E0000
#define DC_ISR_TX_STATE         0x00700000
#define DC_ISR_BUSERRTYPE       0x03800000
#define DC_ISR_100MBPSLINK      0x08000000
#define DC_ISR_MAGICKPACK       0x10000000

#define DC_RXSTATE_STOPPED      0x00000000      /* 000 - Stopped */
#define DC_RXSTATE_FETCH        0x00020000      /* 001 - Fetching descriptor */
#define DC_RXSTATE_ENDCHECK     0x00040000      /* 010 - check for rx end */
#define DC_RXSTATE_WAIT         0x00060000      /* 011 - waiting for packet */
#define DC_RXSTATE_SUSPEND      0x00080000      /* 100 - suspend rx */
#define DC_RXSTATE_CLOSE        0x000A0000      /* 101 - close tx desc */
#define DC_RXSTATE_FLUSH        0x000C0000      /* 110 - flush from FIFO */
#define DC_RXSTATE_DEQUEUE      0x000E0000      /* 111 - dequeue from FIFO */

#define DC_HAS_BROKEN_RXSTATE(x)                                        \
        (DC_IS_CENTAUR(x) || DC_IS_CONEXANT(x) || (DC_IS_DAVICOM(x) &&  \
        pci_get_revid((x)->dc_dev) >= DC_REVISION_DM9102A))

#define DC_TXSTATE_RESET        0x00000000      /* 000 - reset */
#define DC_TXSTATE_FETCH        0x00100000      /* 001 - fetching descriptor */
#define DC_TXSTATE_WAITEND      0x00200000      /* 010 - wait for tx end */
#define DC_TXSTATE_READING      0x00300000      /* 011 - read and enqueue */
#define DC_TXSTATE_RSVD         0x00400000      /* 100 - reserved */
#define DC_TXSTATE_SETUP        0x00500000      /* 101 - setup packet */
#define DC_TXSTATE_SUSPEND      0x00600000      /* 110 - suspend tx */
#define DC_TXSTATE_CLOSE        0x00700000      /* 111 - close tx desc */

/*
 * Network config bits.
 */
#define DC_NETCFG_RX_HASHPERF   0x00000001
#define DC_NETCFG_RX_ON         0x00000002
#define DC_NETCFG_RX_HASHONLY   0x00000004
#define DC_NETCFG_RX_BADFRAMES  0x00000008
#define DC_NETCFG_RX_INVFILT    0x00000010
#define DC_NETCFG_BACKOFFCNT    0x00000020
#define DC_NETCFG_RX_PROMISC    0x00000040
#define DC_NETCFG_RX_ALLMULTI   0x00000080
#define DC_NETCFG_FULLDUPLEX    0x00000200
#define DC_NETCFG_LOOPBACK      0x00000C00
#define DC_NETCFG_FORCECOLL     0x00001000
#define DC_NETCFG_TX_ON         0x00002000
#define DC_NETCFG_TX_THRESH     0x0000C000
#define DC_NETCFG_TX_BACKOFF    0x00020000
#define DC_NETCFG_PORTSEL       0x00040000      /* 0 == 10, 1 == 100 */
#define DC_NETCFG_HEARTBEAT     0x00080000
#define DC_NETCFG_STORENFWD     0x00200000
#define DC_NETCFG_SPEEDSEL      0x00400000      /* 1 == 10, 0 == 100 */
#define DC_NETCFG_PCS           0x00800000
#define DC_NETCFG_SCRAMBLER     0x01000000
#define DC_NETCFG_NO_RXCRC      0x02000000
#define DC_NETCFG_RX_ALL        0x40000000
#define DC_NETCFG_CAPEFFECT     0x80000000

#define DC_OPMODE_NORM          0x00000000
#define DC_OPMODE_INTLOOP       0x00000400
#define DC_OPMODE_EXTLOOP       0x00000800

#if 0
#define DC_TXTHRESH_72BYTES     0x00000000
#define DC_TXTHRESH_96BYTES     0x00004000
#define DC_TXTHRESH_128BYTES    0x00008000
#define DC_TXTHRESH_160BYTES    0x0000C000
#endif

#define DC_TXTHRESH_MIN         0x00000000
#define DC_TXTHRESH_INC         0x00004000
#define DC_TXTHRESH_MAX         0x0000C000


/*
 * Interrupt mask bits.
 */
#define DC_IMR_TX_OK            0x00000001
#define DC_IMR_TX_IDLE          0x00000002
#define DC_IMR_TX_NOBUF         0x00000004
#define DC_IMR_TX_JABBERTIMEO   0x00000008
#define DC_IMR_LINKGOOD         0x00000010
#define DC_IMR_TX_UNDERRUN      0x00000020
#define DC_IMR_RX_OK            0x00000040
#define DC_IMR_RX_NOBUF         0x00000080
#define DC_IMR_RX_READ          0x00000100
#define DC_IMR_RX_WATDOGTIMEO   0x00000200
#define DC_IMR_TX_EARLY         0x00000400
#define DC_IMR_TIMER_EXPIRED    0x00000800
#define DC_IMR_LINKFAIL         0x00001000
#define DC_IMR_BUS_ERR          0x00002000
#define DC_IMR_RX_EARLY         0x00004000
#define DC_IMR_ABNORMAL         0x00008000
#define DC_IMR_NORMAL           0x00010000
#define DC_IMR_100MBPSLINK      0x08000000
#define DC_IMR_MAGICKPACK       0x10000000

#define DC_INTRS        \
        (DC_IMR_RX_OK|DC_IMR_TX_OK|DC_IMR_RX_NOBUF|DC_IMR_RX_WATDOGTIMEO|\
        DC_IMR_TX_NOBUF|DC_IMR_TX_UNDERRUN|DC_IMR_BUS_ERR|              \
        DC_IMR_ABNORMAL|DC_IMR_NORMAL/*|DC_IMR_TX_EARLY*/)
/*
 * Serial I/O (EEPROM/ROM) bits.
 */
#define DC_SIO_EE_CS            0x00000001      /* EEPROM chip select */
#define DC_SIO_EE_CLK           0x00000002      /* EEPROM clock */
#define DC_SIO_EE_DATAIN        0x00000004      /* EEPROM data output */
#define DC_SIO_EE_DATAOUT       0x00000008      /* EEPROM data input */
#define DC_SIO_ROMDATA4         0x00000010
#define DC_SIO_ROMDATA5         0x00000020
#define DC_SIO_ROMDATA6         0x00000040
#define DC_SIO_ROMDATA7         0x00000080
#define DC_SIO_EESEL            0x00000800
#define DC_SIO_ROMSEL           0x00001000
#define DC_SIO_ROMCTL_WRITE     0x00002000
#define DC_SIO_ROMCTL_READ      0x00004000
#define DC_SIO_MII_CLK          0x00010000      /* MDIO clock */
#define DC_SIO_MII_DATAOUT      0x00020000      /* MDIO data out */
#define DC_SIO_MII_DIR          0x00040000      /* MDIO dir */
#define DC_SIO_MII_DATAIN       0x00080000      /* MDIO data in */

#define DC_EECMD_WRITE          0x140
#define DC_EECMD_READ           0x180
#define DC_EECMD_ERASE          0x1c0

#define DC_EE_NODEADDR_OFFSET   0x70
#define DC_EE_NODEADDR          10

/*
 * General purpose timer register
 */
#define DC_TIMER_VALUE          0x0000FFFF
#define DC_TIMER_CONTINUOUS     0x00010000

/*
 * 10baseT status register
 */
#define DC_TSTAT_MIIACT         0x00000001 /* MII port activity */
#define DC_TSTAT_LS100          0x00000002 /* link status of 100baseTX */
#define DC_TSTAT_LS10           0x00000004 /* link status of 10baseT */
#define DC_TSTAT_AUTOPOLARITY   0x00000008
#define DC_TSTAT_AUIACT         0x00000100 /* AUI activity */
#define DC_TSTAT_10BTACT        0x00000200 /* 10baseT activity */
#define DC_TSTAT_NSN            0x00000400 /* non-stable FLPs detected */
#define DC_TSTAT_REMFAULT       0x00000800
#define DC_TSTAT_ANEGSTAT       0x00007000
#define DC_TSTAT_LP_CAN_NWAY    0x00008000 /* link partner supports NWAY */
#define DC_TSTAT_LPCODEWORD     0xFFFF0000 /* link partner's code word */

#define DC_ASTAT_DISABLE        0x00000000
#define DC_ASTAT_TXDISABLE      0x00001000
#define DC_ASTAT_ABDETECT       0x00002000
#define DC_ASTAT_ACKDETECT      0x00003000
#define DC_ASTAT_CMPACKDETECT   0x00004000
#define DC_ASTAT_AUTONEGCMP     0x00005000
#define DC_ASTAT_LINKCHECK      0x00006000

/*
 * PHY reset register
 */
#define DC_SIA_RESET            0x00000001
#define DC_SIA_AUI              0x00000008 /* AUI or 10baseT */

/*
 * 10baseT control register
 */
#define DC_TCTL_ENCODER_ENB     0x00000001
#define DC_TCTL_LOOPBACK        0x00000002
#define DC_TCTL_DRIVER_ENB      0x00000004
#define DC_TCTL_LNKPULSE_ENB    0x00000008
#define DC_TCTL_HALFDUPLEX      0x00000040
#define DC_TCTL_AUTONEGENBL     0x00000080
#define DC_TCTL_RX_SQUELCH      0x00000100
#define DC_TCTL_COLL_SQUELCH    0x00000200
#define DC_TCTL_COLL_DETECT     0x00000400
#define DC_TCTL_SQE_ENB         0x00000800
#define DC_TCTL_LINKTEST        0x00001000
#define DC_TCTL_AUTOPOLARITY    0x00002000
#define DC_TCTL_SET_POL_PLUS    0x00004000
#define DC_TCTL_AUTOSENSE       0x00008000      /* 10bt/AUI autosense */
#define DC_TCTL_100BTXHALF      0x00010000
#define DC_TCTL_100BTXFULL      0x00020000
#define DC_TCTL_100BT4          0x00040000

/*
 * Watchdog timer register
 */
#define DC_WDOG_JABBERDIS       0x00000001
#define DC_WDOG_HOSTUNJAB       0x00000002
#define DC_WDOG_JABBERCLK       0x00000004
#define DC_WDOG_RXWDOGDIS       0x00000010
#define DC_WDOG_RXWDOGCLK       0x00000020
#define DC_WDOG_MUSTBEZERO      0x00000100
#define DC_WDOG_AUIBNC          0x00100000
#define DC_WDOG_ACTIVITY        0x00200000
#define DC_WDOG_RX_MATCH        0x00400000
#define DC_WDOG_LINK            0x00800000
#define DC_WDOG_CTLWREN         0x08000000

/*
 * SIA and General Purpose Port register (X3201)
 */
#define DC_SIAGP_RXMATCH        0x40000000
#define DC_SIAGP_INT1           0x20000000
#define DC_SIAGP_INT0           0x10000000
#define DC_SIAGP_WRITE_EN       0x08000000
#define DC_SIAGP_RXMATCH_EN     0x04000000
#define DC_SIAGP_INT1_EN        0x02000000
#define DC_SIAGP_INT0_EN        0x01000000
#define DC_SIAGP_LED3           0x00800000
#define DC_SIAGP_LED2           0x00400000
#define DC_SIAGP_LED1           0x00200000
#define DC_SIAGP_LED0           0x00100000
#define DC_SIAGP_MD_GP3_OUTPUT  0x00080000
#define DC_SIAGP_MD_GP2_OUTPUT  0x00040000
#define DC_SIAGP_MD_GP1_OUTPUT  0x00020000
#define DC_SIAGP_MD_GP0_OUTPUT  0x00010000

/*
 * Size of a setup frame.
 */
#define DC_SFRAME_LEN           192

/*
 * 21x4x TX/RX list structure.
 */

struct dc_desc {
        uint32_t                dc_status;
        uint32_t                dc_ctl;
        uint32_t                dc_ptr1;
        uint32_t                dc_ptr2;
};

#define dc_data         dc_ptr1
#define dc_next         dc_ptr2

#define DC_RXSTAT_FIFOOFLOW     0x00000001
#define DC_RXSTAT_CRCERR        0x00000002
#define DC_RXSTAT_DRIBBLE       0x00000004
#define DC_RXSTAT_MIIERE        0x00000008
#define DC_RXSTAT_WATCHDOG      0x00000010
#define DC_RXSTAT_FRAMETYPE     0x00000020      /* 0 == IEEE 802.3 */
#define DC_RXSTAT_COLLSEEN      0x00000040
#define DC_RXSTAT_GIANT         0x00000080
#define DC_RXSTAT_LASTFRAG      0x00000100
#define DC_RXSTAT_FIRSTFRAG     0x00000200
#define DC_RXSTAT_MULTICAST     0x00000400
#define DC_RXSTAT_RUNT          0x00000800
#define DC_RXSTAT_RXTYPE        0x00003000
#define DC_RXSTAT_DE            0x00004000
#define DC_RXSTAT_RXERR         0x00008000
#define DC_RXSTAT_RXLEN         0x3FFF0000
#define DC_RXSTAT_OWN           0x80000000

#define DC_RXBYTES(x)           ((x & DC_RXSTAT_RXLEN) >> 16)
#define DC_RXSTAT (DC_RXSTAT_FIRSTFRAG|DC_RXSTAT_LASTFRAG|DC_RXSTAT_OWN)

#define DC_RXCTL_BUFLEN1        0x00000FFF
#define DC_RXCTL_BUFLEN2        0x00FFF000
#define DC_RXCTL_RLINK          0x01000000
#define DC_RXCTL_RLAST          0x02000000

#define DC_TXSTAT_DEFER         0x00000001
#define DC_TXSTAT_UNDERRUN      0x00000002
#define DC_TXSTAT_LINKFAIL      0x00000003
#define DC_TXSTAT_COLLCNT       0x00000078
#define DC_TXSTAT_SQE           0x00000080
#define DC_TXSTAT_EXCESSCOLL    0x00000100
#define DC_TXSTAT_LATECOLL      0x00000200
#define DC_TXSTAT_NOCARRIER     0x00000400
#define DC_TXSTAT_CARRLOST      0x00000800
#define DC_TXSTAT_JABTIMEO      0x00004000
#define DC_TXSTAT_ERRSUM        0x00008000
#define DC_TXSTAT_OWN           0x80000000

#define DC_TXCTL_BUFLEN1        0x000007FF
#define DC_TXCTL_BUFLEN2        0x003FF800
#define DC_TXCTL_FILTTYPE0      0x00400000
#define DC_TXCTL_PAD            0x00800000
#define DC_TXCTL_TLINK          0x01000000
#define DC_TXCTL_TLAST          0x02000000
#define DC_TXCTL_NOCRC          0x04000000
#define DC_TXCTL_SETUP          0x08000000
#define DC_TXCTL_FILTTYPE1      0x10000000
#define DC_TXCTL_FIRSTFRAG      0x20000000
#define DC_TXCTL_LASTFRAG       0x40000000
#define DC_TXCTL_FINT           0x80000000

#define DC_FILTER_PERFECT       0x00000000
#define DC_FILTER_HASHPERF      0x00400000
#define DC_FILTER_INVERSE       0x10000000
#define DC_FILTER_HASHONLY      0x10400000

#define DC_MAXFRAGS             16
#ifdef DEVICE_POLLING
#define DC_RX_LIST_CNT          192
#else
#define DC_RX_LIST_CNT          64
#endif
#define DC_TX_LIST_CNT          256
#define DC_TX_LIST_RSVD         5
#define DC_MIN_FRAMELEN         60
#define DC_RXLEN                1536

#define DC_INC(x, y)            (x) = (x + 1) % y

#define DC_LIST_ALIGN           (sizeof(struct dc_desc))
#define DC_RXBUF_ALIGN          4

/* Macros to easily get the DMA address of a descriptor. */
#define DC_ADDR_LO(x)           ((uint64_t)(x) & 0xFFFFFFFF)
#define DC_RXDESC(sc, i)        \
    (DC_ADDR_LO(sc->dc_ldata.dc_rx_list_paddr + (sizeof(struct dc_desc) * i)))
#define DC_TXDESC(sc, i)        \
    (DC_ADDR_LO(sc->dc_ldata.dc_tx_list_paddr + (sizeof(struct dc_desc) * i)))

#if BYTE_ORDER == BIG_ENDIAN
#define DC_SP_MAC(x)            ((x) << 16)
#else
#define DC_SP_MAC(x)            (x)
#endif

struct dc_list_data {
        struct dc_desc          *dc_rx_list;
        bus_addr_t              dc_rx_list_paddr;
        struct dc_desc          *dc_tx_list;
        bus_addr_t              dc_tx_list_paddr;
};

#define DC_RX_LIST_SZ           ((sizeof(struct dc_desc) * DC_RX_LIST_CNT))
#define DC_TX_LIST_SZ           ((sizeof(struct dc_desc) * DC_TX_LIST_CNT))

struct dc_chain_data {
        struct mbuf             *dc_rx_chain[DC_RX_LIST_CNT];
        struct mbuf             *dc_tx_chain[DC_TX_LIST_CNT];
        bus_dmamap_t            dc_rx_map[DC_RX_LIST_CNT];
        bus_dmamap_t            dc_tx_map[DC_TX_LIST_CNT];
        uint32_t                *dc_sbuf;
        uint8_t                 dc_pad[DC_MIN_FRAMELEN];
        int                     dc_tx_pkts;
        int                     dc_tx_first;
        int                     dc_tx_prod;
        int                     dc_tx_cons;
        int                     dc_tx_cnt;
        int                     dc_rx_prod;
};

struct dc_mediainfo {
        int                     dc_media;
        uint8_t                 *dc_gp_ptr;
        uint8_t                 dc_gp_len;
        uint8_t                 *dc_reset_ptr;
        uint8_t                 dc_reset_len;
        struct dc_mediainfo     *dc_next;
};


struct dc_type {
        uint32_t                dc_devid;
        uint8_t                 dc_minrev;
        const char              *dc_name;
};

/*
 * Registers specific to clone devices.
 * This mainly relates to RX filter programming: not all 21x4x clones
 * use the standard DEC filter programming mechanism.
 */

/*
 * ADMtek specific registers and constants for the AL981 and AN983.
 * The AN983 doesn't use the magic PHY registers.
 */
#define DC_AL_CR                0x88    /* command register */
#define DC_AL_PAR0              0xA4    /* station address */
#define DC_AL_PAR1              0xA8    /* station address */
#define DC_AL_MAR0              0xAC    /* multicast hash filter */
#define DC_AL_MAR1              0xB0    /* multicast hash filter */
#define DC_AL_BMCR              0xB4    /* built in PHY control */
#define DC_AL_BMSR              0xB8    /* built in PHY status */
#define DC_AL_VENID             0xBC    /* built in PHY ID0 */
#define DC_AL_DEVID             0xC0    /* built in PHY ID1 */
#define DC_AL_ANAR              0xC4    /* built in PHY autoneg advert */
#define DC_AL_LPAR              0xC8    /* bnilt in PHY link part. ability */
#define DC_AL_ANER              0xCC    /* built in PHY autoneg expansion */

#define DC_AL_CR_ATUR           0x00000001 /* automatic TX underrun recovery */
#define DC_ADMTEK_PHYADDR       0x1
#define DC_AL_EE_NODEADDR       4
/* End of ADMtek specific registers */

/*
 * ASIX specific registers.
 */
#define DC_AX_FILTIDX           0x68    /* RX filter index */
#define DC_AX_FILTDATA          0x70    /* RX filter data */

/*
 * Special ASIX-specific bits in the ASIX NETCFG register (CSR6).
 */
#define DC_AX_NETCFG_RX_BROAD   0x00000100 

/*
 * RX Filter Index Register values
 */
#define DC_AX_FILTIDX_PAR0      0x00000000
#define DC_AX_FILTIDX_PAR1      0x00000001
#define DC_AX_FILTIDX_MAR0      0x00000002
#define DC_AX_FILTIDX_MAR1      0x00000003
/* End of ASIX specific registers */

/*
 * Macronix specific registers. The Macronix chips have a special
 * register for reading the NWAY status, which we don't use, plus
 * a magic packet register, which we need to tweak a bit per the
 * Macronix application notes.
 */
#define DC_MX_MAGICPACKET       0x80
#define DC_MX_NWAYSTAT          0xA0

/*
 * Magic packet register
 */
#define DC_MX_MPACK_DISABLE     0x00400000

/*
 * NWAY status register.
 */
#define DC_MX_NWAY_10BTHALF     0x08000000
#define DC_MX_NWAY_10BTFULL     0x10000000
#define DC_MX_NWAY_100BTHALF    0x20000000
#define DC_MX_NWAY_100BTFULL    0x40000000
#define DC_MX_NWAY_100BT4       0x80000000

/*
 * These are magic values that must be written into CSR16
 * (DC_MX_MAGICPACKET) in order to put the chip into proper
 * operating mode. The magic numbers are documented in the
 * Macronix 98715 application notes.
 */
#define DC_MX_MAGIC_98713       0x0F370000
#define DC_MX_MAGIC_98713A      0x0B3C0000
#define DC_MX_MAGIC_98715       0x0B3C0000
#define DC_MX_MAGIC_98725       0x0B3C0000
/* End of Macronix specific registers */

/*
 * PNIC 82c168/82c169 specific registers.
 * The PNIC has its own special NWAY support, which doesn't work,
 * and shortcut ways of reading the EEPROM and MII bus.
 */
#define DC_PN_GPIO              0x60    /* general purpose pins control */
#define DC_PN_PWRUP_CFG         0x90    /* config register, set by EEPROM */
#define DC_PN_SIOCTL            0x98    /* serial EEPROM control register */
#define DC_PN_MII               0xA0    /* MII access register */
#define DC_PN_NWAY              0xB8    /* Internal NWAY register */

/* Serial I/O EEPROM register */
#define DC_PN_SIOCTL_DATA       0x0000003F
#define DC_PN_SIOCTL_OPCODE     0x00000300
#define DC_PN_SIOCTL_BUSY       0x80000000

#define DC_PN_EEOPCODE_ERASE    0x00000300
#define DC_PN_EEOPCODE_READ     0x00000600
#define DC_PN_EEOPCODE_WRITE    0x00000100

/*
 * The first two general purpose pins control speed selection and
 * 100Mbps loopback on the 82c168 chip. The control bits should always
 * be set (to make the data pins outputs) and the speed selction and
 * loopback bits set accordingly when changing media. Physically, this
 * will set the state of a relay mounted on the card.
 */
#define DC_PN_GPIO_DATA0        0x000000001
#define DC_PN_GPIO_DATA1        0x000000002
#define DC_PN_GPIO_DATA2        0x000000004
#define DC_PN_GPIO_DATA3        0x000000008
#define DC_PN_GPIO_CTL0         0x000000010
#define DC_PN_GPIO_CTL1         0x000000020
#define DC_PN_GPIO_CTL2         0x000000040
#define DC_PN_GPIO_CTL3         0x000000080
#define DC_PN_GPIO_SPEEDSEL     DC_PN_GPIO_DATA0/* 1 == 100Mbps, 0 == 10Mbps */
#define DC_PN_GPIO_100TX_LOOP   DC_PN_GPIO_DATA1/* 1 == normal, 0 == loop */
#define DC_PN_GPIO_BNC_ENB      DC_PN_GPIO_DATA2
#define DC_PN_GPIO_100TX_LNK    DC_PN_GPIO_DATA3
#define DC_PN_GPIO_SETBIT(sc, r)                        \
        DC_SETBIT(sc, DC_PN_GPIO, ((r) | (r << 4)))
#define DC_PN_GPIO_CLRBIT(sc, r)                        \
        {                                               \
                DC_SETBIT(sc, DC_PN_GPIO, ((r) << 4));  \
                DC_CLRBIT(sc, DC_PN_GPIO, (r));         \
        }

/* shortcut MII access register */
#define DC_PN_MII_DATA          0x0000FFFF
#define DC_PN_MII_RESERVER      0x00020000
#define DC_PN_MII_REGADDR       0x007C0000
#define DC_PN_MII_PHYADDR       0x0F800000
#define DC_PN_MII_OPCODE        0x30000000
#define DC_PN_MII_BUSY          0x80000000

#define DC_PN_MIIOPCODE_READ    0x60020000
#define DC_PN_MIIOPCODE_WRITE   0x50020000

/* Internal NWAY bits */
#define DC_PN_NWAY_RESET        0x00000001      /* reset */
#define DC_PN_NWAY_PDOWN        0x00000002      /* power down */
#define DC_PN_NWAY_BYPASS       0x00000004      /* bypass */
#define DC_PN_NWAY_AUILOWCUR    0x00000008      /* AUI low current */
#define DC_PN_NWAY_TPEXTEND     0x00000010      /* low squelch voltage */
#define DC_PN_NWAY_POLARITY     0x00000020      /* 0 == on, 1 == off */
#define DC_PN_NWAY_TP           0x00000040      /* 1 == tp, 0 == AUI */
#define DC_PN_NWAY_AUIVOLT      0x00000080      /* 1 == full, 0 == half */
#define DC_PN_NWAY_DUPLEX       0x00000100      /* LED, 1 == full, 0 == half */
#define DC_PN_NWAY_LINKTEST     0x00000200      /* 0 == on, 1 == off */
#define DC_PN_NWAY_AUTODETECT   0x00000400      /* 1 == off, 0 == on */
#define DC_PN_NWAY_SPEEDSEL     0x00000800      /* LED, 0 = 10, 1 == 100 */
#define DC_PN_NWAY_NWAY_ENB     0x00001000      /* 0 == off, 1 == on */
#define DC_PN_NWAY_CAP10HDX     0x00002000
#define DC_PN_NWAY_CAP10FDX     0x00004000
#define DC_PN_NWAY_CAP100FDX    0x00008000
#define DC_PN_NWAY_CAP100HDX    0x00010000
#define DC_PN_NWAY_CAP100T4     0x00020000
#define DC_PN_NWAY_ANEGRESTART  0x02000000      /* resets when aneg done */
#define DC_PN_NWAY_REMFAULT     0x04000000
#define DC_PN_NWAY_LPAR10HDX    0x08000000
#define DC_PN_NWAY_LPAR10FDX    0x10000000
#define DC_PN_NWAY_LPAR100FDX   0x20000000
#define DC_PN_NWAY_LPAR100HDX   0x40000000
#define DC_PN_NWAY_LPAR100T4    0x80000000

/* End of PNIC specific registers */

/*
 * CONEXANT specific registers.
 */

#define DC_CONEXANT_PHYADDR     0x1
#define DC_CONEXANT_EE_NODEADDR 0x19A

/* End of CONEXANT specific registers */

/*
 * ULi M5263 specific registers.
 */
#define DC_ULI_FILTER_NPERF     14

#define DC_ULI_PHY_DATA_MASK    0x0000FFFF
#define DC_ULI_PHY_REG_MASK     0x001F0000
#define DC_ULI_PHY_ADDR_MASK    0x03E00000
#define DC_ULI_PHY_OP_WRITE     0x04000000
#define DC_ULI_PHY_OP_READ      0x08000000
#define DC_ULI_PHY_OP_DONE      0x10000000

#define DC_ULI_PHY_DATA_SHIFT   0
#define DC_ULI_PHY_REG_SHIFT    16
#define DC_ULI_PHY_ADDR_SHIFT   21

/* End of ULi M5263 specific registers */

struct dc_softc {
        if_t                    dc_ifp;         /* interface info */
        device_t                dc_dev;         /* device info */
        bus_space_handle_t      dc_bhandle;     /* bus space handle */
        bus_space_tag_t         dc_btag;        /* bus space tag */
        bus_dma_tag_t           dc_ptag;        /* parent DMA tag */
        bus_dmamap_t            dc_sparemap;
        bus_dma_tag_t           dc_rx_ltag;     /* tag for RX descriptors */
        bus_dmamap_t            dc_rx_lmap;
        bus_dma_tag_t           dc_tx_ltag;     /* tag for TX descriptors */
        bus_dmamap_t            dc_tx_lmap;
        bus_dma_tag_t           dc_stag;        /* tag for the setup frame */
        bus_dmamap_t            dc_smap;        /* map for the setup frame */
        bus_addr_t              dc_saddr;       /* DMA address of setup frame */
        bus_dma_tag_t           dc_rx_mtag;     /* tag for RX mbufs */
        bus_dma_tag_t           dc_tx_mtag;     /* tag for TX mbufs */
        void                    *dc_intrhand;
        struct resource         *dc_irq;
        struct resource         *dc_res;
        const struct dc_type    *dc_info;       /* adapter info */
        device_t                dc_miibus;
        uint8_t                 dc_type;
        uint8_t                 dc_pmode;
        uint8_t                 dc_link;
        uint8_t                 dc_cachesize;
        int                     dc_romwidth;
        int                     dc_pnic_rx_bug_save;
        unsigned char           *dc_pnic_rx_buf;
        int                     dc_if_flags;
        uint32_t                dc_flags;
        uint32_t                dc_txthresh;
        uint32_t                dc_eaddr[2];
        uint8_t                 *dc_srom;
        struct dc_mediainfo     *dc_mi;
        struct dc_list_data     dc_ldata;
        struct dc_chain_data    dc_cdata;
        struct callout          dc_stat_ch;
        struct callout          dc_wdog_ch;
        int                     dc_wdog_timer;
        struct mtx              dc_mtx;
#ifdef DEVICE_POLLING
        int                     rxcycles;       /* ... when polling */
#endif
        int                     suspended;      /* 0 = normal  1 = suspended */
};


#define DC_LOCK(_sc)            mtx_lock(&(_sc)->dc_mtx)
#define DC_UNLOCK(_sc)          mtx_unlock(&(_sc)->dc_mtx)
#define DC_LOCK_ASSERT(_sc)     mtx_assert(&(_sc)->dc_mtx, MA_OWNED)

#define DC_TX_POLL              0x00000001
#define DC_TX_COALESCE          0x00000002
#define DC_TX_ADMTEK_WAR        0x00000004
#define DC_TX_USE_TX_INTR       0x00000008
#define DC_RX_FILTER_TULIP      0x00000010
#define DC_TX_INTR_FIRSTFRAG    0x00000020
#define DC_PNIC_RX_BUG_WAR      0x00000040
#define DC_TX_FIXED_RING        0x00000080
#define DC_TX_STORENFWD         0x00000100
#define DC_REDUCED_MII_POLL     0x00000200
#define DC_TX_INTR_ALWAYS       0x00000400
#define DC_21143_NWAY           0x00000800
#define DC_128BIT_HASH          0x00001000
#define DC_64BIT_HASH           0x00002000
#define DC_TULIP_LEDS           0x00004000
#define DC_TX_ALIGN             0x00010000      /* align mbuf on tx */

/*
 * register space access macros
 */
#define CSR_WRITE_4(sc, reg, val)       \
        bus_space_write_4(sc->dc_btag, sc->dc_bhandle, reg, val)

#define CSR_READ_4(sc, reg)             \
        bus_space_read_4(sc->dc_btag, sc->dc_bhandle, reg)

#define CSR_BARRIER_4(sc, reg, flags)                                   \
        bus_space_barrier(sc->dc_btag, sc->dc_bhandle, reg, 4, flags)

#define DC_TIMEOUT              1000

/*
 * General constants that are fun to know.
 */

/*
 * DEC PCI vendor ID
 */
#define DC_VENDORID_DEC         0x1011

/*
 * DEC/Intel 21143 PCI device ID
 */
#define DC_DEVICEID_21143       0x0019

/*
 * Macronix PCI vendor ID
 */
#define DC_VENDORID_MX          0x10D9

/*
 * Macronix PMAC device IDs.
 */
#define DC_DEVICEID_98713       0x0512
#define DC_DEVICEID_987x5       0x0531
#define DC_DEVICEID_98727       0x0532
#define DC_DEVICEID_98732       0x0532

/* Macronix PCI revision codes. */
#define DC_REVISION_98713       0x00
#define DC_REVISION_98713A      0x10
#define DC_REVISION_98715       0x20
#define DC_REVISION_98715AEC_C  0x25
#define DC_REVISION_98725       0x30

/*
 * Compex PCI vendor ID.
 */
#define DC_VENDORID_CP          0x11F6

/*
 * Compex PMAC PCI device IDs.
 */
#define DC_DEVICEID_98713_CP    0x9881

/*
 * Lite-On PNIC PCI vendor ID
 */
#define DC_VENDORID_LO          0x11AD

/*
 * 82c168/82c169 PNIC device IDs. Both chips have the same device
 * ID but different revisions. Revision 0x10 is the 82c168, and
 * 0x20 is the 82c169.
 */
#define DC_DEVICEID_82C168      0x0002

#define DC_REVISION_82C168      0x10
#define DC_REVISION_82C169      0x20

/* 
 * Lite-On PNIC II device ID. Note: this is actually a Macronix 98715A
 * with wake on lan/magic packet support.
 */
#define DC_DEVICEID_82C115      0xc115

/*
 * Davicom vendor ID.
 */
#define DC_VENDORID_DAVICOM     0x1282

/*
 * Davicom device IDs.
 */
#define DC_DEVICEID_DM9009      0x9009
#define DC_DEVICEID_DM9100      0x9100
#define DC_DEVICEID_DM9102      0x9102

/*
 * The DM9102A has the same PCI device ID as the DM9102,
 * but a higher revision code.
 */
#define DC_REVISION_DM9102      0x10
#define DC_REVISION_DM9102A     0x30

/*
 * ADMtek vendor ID.
 */
#define DC_VENDORID_ADMTEK      0x1317

/*
 * ADMtek device IDs.
 */
#define DC_DEVICEID_AL981       0x0981
#define DC_DEVICEID_AN983       0x0985
#define DC_DEVICEID_AN985       0x1985
#define DC_DEVICEID_ADM9511     0x9511
#define DC_DEVICEID_ADM9513     0x9513

/*
 * 3COM PCI vendor ID
 */
#define DC_VENDORID_3COM        0x10b7

/*
 * 3COM OfficeConnect 10/100B (3CSOHO100B-TX)
 */
#define DC_DEVICEID_3CSOHOB     0x9300

/*
 * ASIX vendor ID.
 */
#define DC_VENDORID_ASIX        0x125B

/*
 * ASIX device IDs.
 */
#define DC_DEVICEID_AX88140A    0x1400

/*
 * The ASIX AX88140 and ASIX AX88141 have the same vendor and
 * device IDs but different revision values.
 */
#define DC_REVISION_88140       0x00
#define DC_REVISION_88141       0x10

/*
 * Accton vendor ID.
 */
#define DC_VENDORID_ACCTON      0x1113

/*
 * Accton device IDs.
 */
#define DC_DEVICEID_EN1217      0x1217
#define DC_DEVICEID_EN2242      0x1216

/*
 * Xircom vendor ID
 */
#define DC_VENDORID_XIRCOM      0x115d

/*
 * Xircom device IDs.
 */
#define DC_DEVICEID_X3201       0x0003

/*
 * D-Link vendor ID
 */
#define DC_VENDORID_DLINK       0x1186

/*
 * D-Link device IDs.
 */
#define DC_DEVICEID_DRP32TXD    0x1561

/*
 * Abocom vendor ID
 */
#define DC_VENDORID_ABOCOM      0x13d1

/*
 * Abocom device IDs.
 */
#define DC_DEVICEID_FE2500      0xAB02
#define DC_DEVICEID_FE2500MX    0xab08

/*
 * Conexant vendor ID.
 */
#define DC_VENDORID_CONEXANT    0x14f1

/*
 * Conexant device IDs.
 */
#define DC_DEVICEID_RS7112      0x1803

/*
 * Planex vendor ID
 */
#define DC_VENDORID_PLANEX     0x14ea

/*
 * Planex device IDs.
 */
#define DC_DEVICEID_FNW3602T   0xab08

/*
 * Not sure who this vendor should be, so we'll go with HAWKING until
 * I can locate the right one.
 */
#define DC_VENDORID_HAWKING     0x17b3

/*
 * Sure looks like an abocom device ID, but it found on my hawking PN672TX
 * card.  Use that for now, and upgrade later.
 */
#define DC_DEVICEID_HAWKING_PN672TX 0xab08

/*
 * Microsoft device ID.
 */
#define DC_VENDORID_MICROSOFT           0x1414

/*
 * Supported Microsoft PCI and CardBus NICs. These are really
 * ADMtek parts in disguise.
 */

#define DC_DEVICEID_MSMN120     0x0001
#define DC_DEVICEID_MSMN130     0x0002

/*
 * Linksys vendor ID.
 */
#define DC_VENDORID_LINKSYS     0x1737

/*
 * Linksys device IDs.
 */
#define DC_DEVICEID_PCMPC200_AB08       0xab08
#define DC_DEVICEID_PCMPC200_AB09       0xab09

/*
 * ULi vendor ID.
 */
#define DC_VENDORID_ULI         0x10b9

/*
 * ULi device IDs.
 */
#define DC_DEVICEID_M5261       0x5261
#define DC_DEVICEID_M5263       0x5263

#define DC_DEVID(vendor, device)        ((device) << 16 | (vendor))

/*
 * PCI low memory base and low I/O base register, and
 * other PCI registers.
 */

#define DC_PCI_CFBIO            PCIR_BAR(0)     /* Base I/O address */
#define DC_PCI_CFBMA            PCIR_BAR(1)     /* Base memory address */
#define DC_PCI_CFDD             0x40    /* Device and driver area */
#define DC_PCI_CWUA0            0x44    /* Wake-Up LAN addr 0 */
#define DC_PCI_CWUA1            0x48    /* Wake-Up LAN addr 1 */
#define DC_PCI_SOP0             0x4C    /* SecureON passwd 0 */
#define DC_PCI_SOP1             0x50    /* SecureON passwd 1 */
#define DC_PCI_CWUC             0x54    /* Configuration Wake-Up cmd */

#define DC_21143_PB_REV         0x00000030
#define DC_21143_TB_REV         0x00000030
#define DC_21143_PC_REV         0x00000030
#define DC_21143_TC_REV         0x00000030
#define DC_21143_PD_REV         0x00000041
#define DC_21143_TD_REV         0x00000041

/* Configuration and driver area */
#define DC_CFDD_DRVUSE          0x0000FFFF
#define DC_CFDD_SNOOZE_MODE     0x40000000
#define DC_CFDD_SLEEP_MODE      0x80000000

/* Configuration wake-up command register */
#define DC_CWUC_MUST_BE_ZERO    0x00000001
#define DC_CWUC_SECUREON_ENB    0x00000002
#define DC_CWUC_FORCE_WUL       0x00000004
#define DC_CWUC_BNC_ABILITY     0x00000008
#define DC_CWUC_AUI_ABILITY     0x00000010
#define DC_CWUC_TP10_ABILITY    0x00000020
#define DC_CWUC_MII_ABILITY     0x00000040
#define DC_CWUC_SYM_ABILITY     0x00000080
#define DC_CWUC_LOCK            0x00000100

/*
 * SROM nonsense.
 */

#define DC_ROM_SIZE(bits)       (2 << (bits))

#define DC_IB_CTLRCNT           0x13
#define DC_IB_LEAF0_CNUM        0x1A
#define DC_IB_LEAF0_OFFSET      0x1B

struct dc_info_leaf {
        uint16_t                dc_conntype;
        uint8_t                 dc_blkcnt;
        uint8_t                 dc_rsvd;
        uint16_t                dc_infoblk;
};

#define DC_CTYPE_10BT                   0x0000
#define DC_CTYPE_10BT_NWAY              0x0100
#define DC_CTYPE_10BT_FDX               0x0204
#define DC_CTYPE_10B2                   0x0001
#define DC_CTYPE_10B5                   0x0002
#define DC_CTYPE_100BT                  0x0003
#define DC_CTYPE_100BT_FDX              0x0205
#define DC_CTYPE_100T4                  0x0006
#define DC_CTYPE_100FX                  0x0007
#define DC_CTYPE_100FX_FDX              0x0208
#define DC_CTYPE_MII_10BT               0x0009
#define DC_CTYPE_MII_10BT_FDX           0x020A
#define DC_CTYPE_MII_100BT              0x000D
#define DC_CTYPE_MII_100BT_FDX          0x020E
#define DC_CTYPE_MII_100T4              0x000F
#define DC_CTYPE_MII_100FX              0x0010
#define DC_CTYPE_MII_100FX_FDX          0x0211
#define DC_CTYPE_DYN_PUP_AUTOSENSE      0x0800
#define DC_CTYPE_PUP_AUTOSENSE          0x8800
#define DC_CTYPE_NOMEDIA                0xFFFF

#define DC_EBLOCK_SIA                   0x0002
#define DC_EBLOCK_MII                   0x0003
#define DC_EBLOCK_SYM                   0x0004
#define DC_EBLOCK_RESET                 0x0005
#define DC_EBLOCK_PHY_SHUTDOWN          0x0006

struct dc_leaf_hdr {
        uint16_t                dc_mtype;
        uint8_t                 dc_mcnt;
        uint8_t                 dc_rsvd;
};

struct dc_eblock_hdr {
        uint8_t                 dc_len;
        uint8_t                 dc_type;
};

struct dc_eblock_sia {
        struct dc_eblock_hdr    dc_sia_hdr;
        uint8_t         dc_sia_code;
        union {
                struct dc_sia_ext { /* if (dc_sia_code & DC_SIA_CODE_EXT) */
                        uint8_t dc_sia_mediaspec[6]; /* CSR13, CSR14, CSR15 */
                        uint8_t dc_sia_gpio_ctl[2];
                        uint8_t dc_sia_gpio_dat[2];
                } dc_sia_ext;
                struct dc_sia_noext { 
                        uint8_t dc_sia_gpio_ctl[2];
                        uint8_t dc_sia_gpio_dat[2];
                } dc_sia_noext;
        } dc_un;
};

#define DC_SIA_CODE_10BT        0x00
#define DC_SIA_CODE_10B2        0x01
#define DC_SIA_CODE_10B5        0x02
#define DC_SIA_CODE_10BT_FDX    0x04
#define DC_SIA_CODE_EXT         0x40

/*
 * Note that the first word in the gpr and reset
 * sequences is always a control word.
 */
struct dc_eblock_mii {
        struct dc_eblock_hdr    dc_mii_hdr;
        uint8_t                 dc_mii_phynum;
        uint8_t                 dc_gpr_len;
/*      uint16_t                dc_gpr_dat[n]; */
/*      uint8_t                 dc_reset_len; */
/*      uint16_t                dc_reset_dat[n]; */
/* There are other fields after these, but we don't
 * care about them since they can be determined by looking
 * at the PHY.
 */
};

struct dc_eblock_sym {
        struct dc_eblock_hdr    dc_sym_hdr;
        uint8_t                 dc_sym_code;
        uint8_t                 dc_sym_gpio_ctl[2];
        uint8_t                 dc_sym_gpio_dat[2];
        uint8_t                 dc_sym_cmd[2];
};

#define DC_SYM_CODE_100BT       0x03
#define DC_SYM_CODE_100BT_FDX   0x05
#define DC_SYM_CODE_100T4       0x06
#define DC_SYM_CODE_100FX       0x07
#define DC_SYM_CODE_100FX_FDX   0x08

struct dc_eblock_reset {
        struct dc_eblock_hdr    dc_reset_hdr;
        uint8_t                 dc_reset_len;
/*      uint16_t                dc_reset_dat[n]; */
};