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/* am7990 (lance) definitions

 *

 * This is an extension to the Linux operating system, and is covered by

 * same GNU General Public License that covers that work.

 *

 * Michael Hipp

 * email: mhipp@student.uni-tuebingen.de

 *

 * sources: (mail me or ask archie if you need them)

 *    crynwr-packet-driver

 */

/*

 *      Control and Status Register 0 (CSR0) bit definitions

 * (R=Readable) (W=Writeable) (S=Set on write) (C-Clear on write)

 *

 */

#define CSR0_ERR        0x8000  /* Error summary (R) */

#define CSR0_BABL       0x4000  /* Babble transmitter timeout error (RC) */

#define CSR0_CERR       0x2000  /* Collision Error (RC) */

#define CSR0_MISS       0x1000  /* Missed packet (RC) */

#define CSR0_MERR       0x0800  /* Memory Error (RC) */

#define CSR0_RINT       0x0400  /* Receiver Interrupt (RC) */

#define CSR0_TINT       0x0200  /* Transmit Interrupt (RC) */

#define CSR0_IDON       0x0100  /* Initialization Done (RC) */

#define CSR0_INTR       0x0080  /* Interrupt Flag (R) */

#define CSR0_INEA       0x0040  /* Interrupt Enable (RW) */

#define CSR0_RXON       0x0020  /* Receiver on (R) */

#define CSR0_TXON       0x0010  /* Transmitter on (R) */

#define CSR0_TDMD       0x0008  /* Transmit Demand (RS) */

#define CSR0_STOP       0x0004  /* Stop (RS) */

#define CSR0_STRT       0x0002  /* Start (RS) */

#define CSR0_INIT       0x0001  /* Initialize (RS) */

#define CSR0_CLRALL    0x7f00   /* mask for all clearable bits */

/*

 *      Initialization Block  Mode operation Bit Definitions.

 */

#define M_PROM          0x8000  /* Promiscuous Mode */

#define M_INTL          0x0040  /* Internal Loopback */

#define M_DRTY          0x0020  /* Disable Retry */

#define M_COLL          0x0010  /* Force Collision */

#define M_DTCR          0x0008  /* Disable Transmit CRC) */

#define M_LOOP          0x0004  /* Loopback */

#define M_DTX           0x0002  /* Disable the Transmitter */

#define M_DRX           0x0001  /* Disable the Receiver */

/*

 *      Receive message descriptor bit definitions.

 */

#define RCV_OWN         0x80    /* owner bit 0 = host, 1 = lance */

#define RCV_ERR         0x40    /* Error Summary */

#define RCV_FRAM        0x20    /* Framing Error */

#define RCV_OFLO        0x10    /* Overflow Error */

#define RCV_CRC         0x08    /* CRC Error */

#define RCV_BUF_ERR     0x04    /* Buffer Error */

#define RCV_START       0x02    /* Start of Packet */

#define RCV_END         0x01    /* End of Packet */

/*

 *      Transmit  message descriptor bit definitions.

 */

#define XMIT_OWN        0x80    /* owner bit 0 = host, 1 = lance */

#define XMIT_ERR        0x40    /* Error Summary */

#define XMIT_RETRY      0x10    /* more the 1 retry needed to Xmit */

#define XMIT_1_RETRY    0x08    /* one retry needed to Xmit */

#define XMIT_DEF        0x04    /* Deferred */

#define XMIT_START      0x02    /* Start of Packet */

#define XMIT_END        0x01    /* End of Packet */

/*

 * transmit status (2) (valid if XMIT_ERR == 1)

 */

#define XMIT_TDRMASK    0x03ff  /* time-domain-reflectometer-value */

#define XMIT_RTRY       0x0400  /* Failed after 16 retransmissions  */

#define XMIT_LCAR       0x0800  /* Loss of Carrier */

#define XMIT_LCOL       0x1000  /* Late collision */

#define XMIT_RESERV     0x2000  /* Reserved */

#define XMIT_UFLO       0x4000  /* Underflow (late memory) */

#define XMIT_BUFF       0x8000  /* Buffering error (no ENP) */

struct init_block {

        unsigned short mode;

        unsigned char eaddr[6];

        unsigned char filter[8];

        /* bit 29-31: number of rmd's (power of 2) */

        u32 rrp;                /* receive ring pointer (align 8) */

        /* bit 29-31: number of tmd's (power of 2) */

        u32 trp;                /* transmit ring pointer (align 8) */

};

struct rmd {                    /* Receive Message Descriptor */

        union {

                volatile u32 buffer;

                struct {

                        volatile unsigned char dummy[3];

                        volatile unsigned char status;

                } s;

        } u;

        volatile short blen;

        volatile unsigned short mlen;

};

struct tmd {

        union {

                volatile u32 buffer;

                struct {

                        volatile unsigned char dummy[3];

                        volatile unsigned char status;

                } s;

        } u;

        volatile unsigned short blen;

        volatile unsigned short status2;

};