root/drivers/net/ni52.h

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   1 /*
   2  * Intel i82586 Ethernet definitions
   3  *
   4  * This is an extension to the Linux operating system, and is covered by the
   5  * same Gnu Public License that covers that work.
   6  *
   7  * copyrights (c) 1994 by Michael Hipp (mhipp@student.uni-tuebingen.de)
   8  *
   9  * I have done a look in the following sources:
  10  *   crynwr-packet-driver by Russ Nelson
  11  *   Garret A. Wollman's i82586-driver for BSD
  12  */
  13 
  14  
  15 #define NI52_RESET     0  /* writing to this address, resets the i82586 */
  16 #define NI52_ATTENTION 1  /* channel attention, kick the 586 */
  17 #define NI52_TENA      3  /* 2-5 possibly wrong, Xmit enable */
  18 #define NI52_TDIS      2  /* Xmit disable */
  19 #define NI52_INTENA    5  /* Interrupt enable */
  20 #define NI52_INTDIS    4  /* Interrupt disable */
  21 #define NI52_MAGIC1    6  /* dunno exact function */
  22 #define NI52_MAGIC2    7  /* dunno exact function */
  23 
  24 #define NI52_MAGICVAL1 0x00  /* magic-values for ni5210 card */
  25 #define NI52_MAGICVAL2 0x55
  26 
  27 /*
  28  * where to find the System Configuration Pointer (SCP)
  29  */
  30 #define SCP_DEFAULT_ADDRESS 0xfffff4
  31 
  32 
  33 /*
  34  * System Configuration Pointer Struct
  35  */
  36 
  37 struct scp_struct
  38 {
  39   unsigned short zero_dum0;     /* has to be zero */
  40   unsigned char  sysbus;        /* 0=16Bit,1=8Bit */
  41   unsigned char  zero_dum1;     /* has to be zero for 586 */
  42   unsigned short zero_dum2;
  43   unsigned short zero_dum3;
  44   char          *iscp;          /* pointer to the iscp-block */
  45 };
  46 
  47 
  48 /*
  49  * Intermediate System Configuration Pointer (ISCP)
  50  */
  51 struct iscp_struct
  52 {
  53   unsigned char  busy;          /* 586 clears after successful init */
  54   unsigned char  zero_dummy;    /* hast to be zero */
  55   unsigned short scb_offset;    /* pointeroffset to the scb_base */
  56   char          *scb_base;      /* base-address of all 16-bit offsets */
  57 };
  58 
  59 /*
  60  * System Control Block (SCB)
  61  */
  62 struct scb_struct
  63 {
  64   unsigned short status;        /* status word */
  65   unsigned short cmd;           /* command word */
  66   unsigned short cbl_offset;    /* pointeroffset, command block list */
  67   unsigned short rfa_offset;    /* pointeroffset, receive frame area */
  68   unsigned short crc_errs;      /* CRC-Error counter */
  69   unsigned short aln_errs;      /* allignmenterror counter */
  70   unsigned short rsc_errs;      /* Resourceerror counter */
  71   unsigned short ovrn_errs;     /* OVerrunerror counter */
  72 };
  73 
  74 /*
  75  * possible command values for the command word
  76  */
  77 #define RUC_MASK        0x0070  /* mask for RU commands */
  78 #define RUC_NOP         0x0000  /* NOP-command */
  79 #define RUC_START       0x0010  /* start RU */
  80 #define RUC_RESUME      0x0020  /* resume RU after suspend */
  81 #define RUC_SUSPEND     0x0030  /* suspend RU */
  82 #define RUC_ABORT       0x0040  /* abort receiver operation immediately */
  83 
  84 #define CUC_MASK        0x0700  /* mask for CU command */
  85 #define CUC_NOP         0x0000  /* NOP-command */
  86 #define CUC_START       0x0100  /* start execution of 1. cmd on the CBL */
  87 #define CUC_RESUME      0x0200  /* resume after suspend */
  88 #define CUC_SUSPEND     0x0300  /* Suspend CU */
  89 #define CUC_ABORT       0x0400  /* abort command operation immediately */
  90 
  91 #define ACK_MASK        0xf000  /* mask for ACK command */
  92 #define ACK_CX          0x8000  /* acknowledges STAT_CX */
  93 #define ACK_FR          0x4000  /* ack. STAT_FR */
  94 #define ACK_CNA         0x2000  /* ack. STAT_CNA */
  95 #define ACK_RNR         0x1000  /* ack. STAT_RNR */
  96 
  97 /*
  98  * possible status values for the status word
  99  */
 100 #define STAT_MASK       0xf000  /* mask for cause of interrupt */
 101 #define STAT_CX         0x8000  /* CU finished cmd with its I bit set */
 102 #define STAT_FR         0x4000  /* RU finished receiving a frame */
 103 #define STAT_CNA        0x2000  /* CU left active state */
 104 #define STAT_RNR        0x1000  /* RU left ready state */
 105 
 106 #define CU_STATUS       0x700   /* CU status, 0=idle */
 107 #define CU_SUSPEND      0x100   /* CU is suspended */
 108 #define CU_ACTIVE       0x200   /* CU is active */
 109 
 110 #define RU_STATUS       0x70    /* RU status, 0=idle */
 111 #define RU_SUSPEND      0x10    /* RU suspended */
 112 #define RU_NOSPACE      0x20    /* RU no resources */
 113 #define RU_READY        0x40    /* RU is ready */
 114 
 115 /*
 116  * Receive Frame Descriptor (RFD)
 117  */
 118 struct rfd_struct
 119 {
 120   unsigned short status;        /* status word */
 121   unsigned short last;          /* Bit15,Last Frame on List / Bit14,suspend */
 122   unsigned short next;          /* linkoffset to next RFD */
 123   unsigned short rbd_offset;    /* pointeroffset to RBD-buffer */
 124   unsigned char  dest[6];       /* ethernet-address, destination */
 125   unsigned char  source[6];     /* ethernet-address, source */
 126   unsigned short length;        /* 802.3 frame-length */
 127   unsigned short zero_dummy;    /* dummy */
 128 };
 129 
 130 #define RFD_LAST     0x8000     /* last: last rfd in the list */
 131 #define RFD_SUSP     0x4000     /* last: suspend RU after  */
 132 #define RFD_ERRMASK  0x0fe1     /* status: errormask */
 133 #define RFD_MATCHADD 0x0002     /* status: Destinationaddress !matches IA */
 134 #define RFD_RNR      0x0200     /* status: receiver out of resources */
 135 
 136 /*
 137  * Receive Buffer Descriptor (RBD)
 138  */
 139 struct rbd_struct 
 140 {
 141   unsigned short status;        /* status word,number of used bytes in buff */
 142   unsigned short next;          /* pointeroffset to next RBD */
 143   char          *buffer;        /* receive buffer address pointer */
 144   unsigned short size;          /* size of this buffer */
 145   unsigned short zero_dummy;    /* dummy */
 146 };
 147 
 148 #define RBD_LAST        0x8000  /* last buffer */
 149 #define RBD_USED        0x4000  /* this buffer has data */
 150 #define RBD_MASK        0x3fff  /* size-mask for length */
 151 
 152 /*
 153  * Statusvalues for Commands/RFD
 154  */
 155 #define STAT_COMPL   0x8000     /* status: frame/command is complete */
 156 #define STAT_BUSY    0x4000     /* status: frame/command is busy */
 157 #define STAT_OK      0x2000     /* status: frame/command is ok */
 158 
 159 /*
 160  * Action-Commands
 161  */
 162 #define CMD_NOP         0x0000  /* NOP */
 163 #define CMD_IASETUP     0x0001  /* initial address setup command */
 164 #define CMD_CONFIGURE   0x0002  /* configure command */
 165 #define CMD_MCSETUP     0x0003  /* MC setup command */
 166 #define CMD_XMIT        0x0004  /* transmit command */
 167 #define CMD_TDR         0x0005  /* time domain reflectometer (TDR) command */
 168 #define CMD_DUMP        0x0006  /* dump command */
 169 #define CMD_DIAGNOSE    0x0007  /* diagnose command */
 170 
 171 /*
 172  * Action command bits
 173  */
 174 #define CMD_LAST        0x8000  /* indicates last command in the CBL */
 175 #define CMD_SUSPEND     0x4000  /* suspend CU after this CB */
 176 #define CMD_INT         0x2000  /* generate interrupt after execution */
 177 
 178 /*
 179  * NOP - command
 180  */
 181 struct nop_cmd_struct
 182 {
 183   unsigned short cmd_status;    /* status of this command */
 184   unsigned short cmd_cmd;       /* the command itself (+bits) */
 185   unsigned short cmd_link;      /* offsetpointer to next command */
 186 };
 187 
 188 /*
 189  * IA Setup command
 190  */
 191 struct iasetup_cmd_struct 
 192 {
 193   unsigned short cmd_status;
 194   unsigned short cmd_cmd;
 195   unsigned short cmd_link;
 196   unsigned char  iaddr[6];
 197 };
 198 
 199 /*
 200  * Configure command 
 201  */
 202 struct configure_cmd_struct
 203 {
 204   unsigned short cmd_status;
 205   unsigned short cmd_cmd;
 206   unsigned short cmd_link;
 207   unsigned char  byte_cnt;   /* size of the config-cmd */
 208   unsigned char  fifo;       /* fifo/recv monitor */
 209   unsigned char  sav_bf;     /* save bad frames (bit7=1)*/
 210   unsigned char  adr_len;    /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/
 211   unsigned char  priority;   /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */
 212   unsigned char  ifs;        /* inter frame spacing */
 213   unsigned char  time_low;   /* slot time low */
 214   unsigned char  time_high;  /* slot time high(0-2) and max. retries(4-7) */
 215   unsigned char  promisc;    /* promisc-mode(0) , et al (1-7) */
 216   unsigned char  carr_coll;  /* carrier(0-3)/collision(4-7) stuff */
 217   unsigned char  fram_len;   /* minimal frame len */
 218   unsigned char  dummy;      /* dummy */
 219 };
 220 
 221 /*
 222  * Multicast Setup command 
 223  */
 224 struct mcsetup_cmd_struct 
 225 {
 226   unsigned short cmd_status;
 227   unsigned short cmd_cmd;
 228   unsigned short cmd_link;
 229   unsigned short mc_cnt;                /* number of bytes in the MC-List */
 230   unsigned char  mc_list[0][6];         /* pointer to 6 bytes entries */
 231 };
 232 
 233 /*
 234  * transmit command 
 235  */
 236 struct transmit_cmd_struct 
 237 {
 238   unsigned short cmd_status;
 239   unsigned short cmd_cmd;
 240   unsigned short cmd_link;
 241   unsigned short tbd_offset;    /* pointeroffset to TBD */
 242   unsigned char  dest[6];       /* destination address of the frame */
 243   unsigned short length;        /* user defined: 802.3 length / Ether type */
 244 };
 245 
 246 #define TCMD_ERRMASK     0x0fa0
 247 #define TCMD_MAXCOLLMASK 0x000f
 248 #define TCMD_MAXCOLL     0x0020
 249 #define TCMD_HEARTBEAT   0x0040
 250 #define TCMD_DEFERRED    0x0080
 251 #define TCMD_UNDERRUN    0x0100
 252 #define TCMD_LOSTCTS     0x0200
 253 #define TCMD_NOCARRIER   0x0400
 254 #define TCMD_LATECOLL    0x0800
 255 
 256 struct tdr_cmd_struct
 257 {
 258   unsigned short cmd_status;
 259   unsigned short cmd_cmd;
 260   unsigned short cmd_link;
 261   unsigned short status;
 262 };
 263 
 264 #define TDR_LNK_OK      0x8000  /* No link problem identified */
 265 #define TDR_XCVR_PRB    0x4000  /* indicates a transceiver problem */
 266 #define TDR_ET_OPN      0x2000  /* open, no correct termination */
 267 #define TDR_ET_SRT      0x1000  /* TDR detected a short circuit */
 268 #define TDR_TIMEMASK    0x07ff  /* mask for the time field */
 269 
 270 /*
 271  * Transmit Buffer Descriptor (TBD)
 272  */
 273 struct tbd_struct
 274 {
 275   unsigned short size;          /* size + EOF-Flag(15) */
 276   unsigned short next;          /* pointeroffset to next TBD */
 277   char          *buffer;        /* pointer to buffer */
 278 };
 279 
 280 #define TBD_LAST 0x8000         /* EOF-Flag, indicates last buffer in list */
 281 
 282 
 283 
 284 

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