arch/common/boot/grub/netboot/sk_g16.h

   1 /*-
   2  *
   3  * This software may be used and distributed according to the terms
   4  * of the GNU Public License, incorporated herein by reference.
   5  *
   6  * Module         : sk_g16.h
   7  * Version        : $Revision$
   8  *
   9  * Author         : M.Hipp (mhipp@student.uni-tuebingen.de)
  10  * changes by     : Patrick J.D. Weichmann
  11  *
  12  * Date Created   : 94/05/25
  13  *
  14  * Description    : In here are all necessary definitions of
  15  *                  the am7990 (LANCE) chip used for writing a
  16  *                  network device driver which uses this chip
  17  *
  18  * $Log: sk_g16.h,v $
  19  * Revision 1.3  2000/07/29 19:22:54  okuji
  20  * update the network support to etherboot-4.6.4.
  21  *
  22 -*/
  23
  24 #ifndef SK_G16_H
  25
  26 #define SK_G16_H
  27
  28
  29 /*
  30  *      Control and Status Register 0 (CSR0) bit definitions
  31  *
  32  * (R=Readable) (W=Writeable) (S=Set on write) (C-Clear on write)
  33  *
  34  */
  35
  36 #define CSR0_ERR        0x8000  /* Error summary (R) */
  37 #define CSR0_BABL       0x4000  /* Babble transmitter timeout error (RC) */
  38 #define CSR0_CERR       0x2000  /* Collision Error (RC) */
  39 #define CSR0_MISS       0x1000  /* Missed packet (RC) */
  40 #define CSR0_MERR       0x0800  /* Memory Error  (RC) */
  41 #define CSR0_RINT       0x0400  /* Receiver Interrupt (RC) */
  42 #define CSR0_TINT       0x0200  /* Transmit Interrupt (RC) */
  43 #define CSR0_IDON       0x0100  /* Initialization Done (RC) */
  44 #define CSR0_INTR       0x0080  /* Interrupt Flag (R) */
  45 #define CSR0_INEA       0x0040  /* Interrupt Enable (RW) */
  46 #define CSR0_RXON       0x0020  /* Receiver on (R) */
  47 #define CSR0_TXON       0x0010  /* Transmitter on (R) */
  48 #define CSR0_TDMD       0x0008  /* Transmit Demand (RS) */
  49 #define CSR0_STOP       0x0004  /* Stop (RS) */
  50 #define CSR0_STRT       0x0002  /* Start (RS) */
  51 #define CSR0_INIT       0x0001  /* Initialize (RS) */
  52
  53 #define CSR0_CLRALL     0x7f00  /* mask for all clearable bits */
  54
  55 /*
  56  *    Control and Status Register 3 (CSR3) bit definitions
  57  *
  58  */
  59
  60 #define CSR3_BSWAP      0x0004  /* Byte Swap (RW) */
  61 #define CSR3_ACON       0x0002  /* ALE Control (RW) */
  62 #define CSR3_BCON       0x0001  /* Byte Control (RW) */
  63
  64 /*
  65  *      Initialization Block Mode operation Bit Definitions.
  66  */
  67
  68 #define MODE_PROM       0x8000  /* Promiscuous Mode */
  69 #define MODE_INTL       0x0040  /* Internal Loopback */
  70 #define MODE_DRTY       0x0020  /* Disable Retry */
  71 #define MODE_COLL       0x0010  /* Force Collision */
  72 #define MODE_DTCR       0x0008  /* Disable Transmit CRC) */
  73 #define MODE_LOOP       0x0004  /* Loopback */
  74 #define MODE_DTX        0x0002  /* Disable the Transmitter */
  75 #define MODE_DRX        0x0001  /* Disable the Receiver */
  76
  77 #define MODE_NORMAL     0x0000  /* Normal operation mode */
  78
  79 /*
  80  *      Receive message descriptor status bit definitions.
  81  */
  82
  83 #define RX_OWN          0x80    /* Owner bit 0 = host, 1 = lance */
  84 #define RX_ERR          0x40    /* Error Summary */
  85 #define RX_FRAM         0x20    /* Framing Error */
  86 #define RX_OFLO         0x10    /* Overflow Error */
  87 #define RX_CRC          0x08    /* CRC Error */
  88 #define RX_BUFF         0x04    /* Buffer Error */
  89 #define RX_STP          0x02    /* Start of Packet */
  90 #define RX_ENP          0x01    /* End of Packet */
  91
  92
  93 /*
  94  *      Transmit message descriptor status bit definitions.
  95  */
  96
  97 #define TX_OWN          0x80    /* Owner bit 0 = host, 1 = lance */
  98 #define TX_ERR          0x40    /* Error Summary */
  99 #define TX_MORE         0x10    /* More the 1 retry needed to Xmit */
 100 #define TX_ONE          0x08    /* One retry needed to Xmit */
 101 #define TX_DEF          0x04    /* Deferred */
 102 #define TX_STP          0x02    /* Start of Packet */
 103 #define TX_ENP          0x01    /* End of Packet */
 104
 105 /*
 106  *      Transmit status (2) (valid if TX_ERR == 1)
 107  */
 108
 109 #define TX_BUFF         0x8000  /* Buffering error (no ENP) */
 110 #define TX_UFLO         0x4000  /* Underflow (late memory) */
 111 #define TX_LCOL         0x1000  /* Late collision */
 112 #define TX_LCAR         0x0400  /* Loss of Carrier */
 113 #define TX_RTRY         0x0200  /* Failed after 16 retransmissions  */
 114 #define TX_TDR          0x003f  /* Time-domain-reflectometer-value */
 115
 116
 117 /*
 118  * Structures used for Communication with the LANCE
 119  */
 120
 121 /* LANCE Initialize Block */
 122
 123 struct init_block
 124 {
 125   unsigned short mode;     /* Mode Register */
 126   unsigned char  paddr[6]; /* Physical Address (MAC) */
 127   unsigned char  laddr[8]; /* Logical Filter Address (not used) */
 128   unsigned int   rdrp;     /* Receive Descriptor Ring pointer */
 129   unsigned int   tdrp;     /* Transmit Descriptor Ring pointer */
 130 };
 131
 132
 133 /* Receive Message Descriptor Entry */
 134
 135 struct rmd
 136 {
 137   union rmd_u
 138   {
 139     unsigned long buffer;     /* Address of buffer */
 140     struct rmd_s
 141     {
 142       unsigned char unused[3];
 143       unsigned volatile char status;   /* Status Bits */
 144     } s;
 145   } u;
 146   volatile short blen;        /* Buffer Length (two's complement) */
 147   unsigned short mlen;        /* Message Byte Count */
 148 };
 149
 150
 151 /* Transmit Message Descriptor Entry */
 152
 153 struct tmd
 154 {
 155   union tmd_u
 156   {
 157     unsigned long  buffer;    /* Address of buffer */
 158     struct tmd_s
 159     {
 160       unsigned char unused[3];
 161       unsigned volatile char status;   /* Status Bits */
 162     } s;
 163   } u;
 164   unsigned short blen;             /* Buffer Length (two's complement) */
 165   unsigned volatile short status2; /* Error Status Bits */
 166 };
 167
 168 #endif  /* End of SK_G16_H */