drivers/net/ethernet/i825xx/sun3_82586.h

   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 (hippm@informatik.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  * Cloned from ni52.h, copyright as above.
  16  *
  17  * Modified for Sun3 OBIO i82586 by Sam Creasey (sammy@sammy.net)
  18  */
  19
  20
  21 /* defines for the obio chip (not vme) */
  22 #define IEOB_NORSET 0x80        /* don't reset the board */
  23 #define IEOB_ONAIR  0x40        /* put us on the air */
  24 #define IEOB_ATTEN  0x20        /* attention! */
  25 #define IEOB_IENAB  0x10        /* interrupt enable */
  26 #define IEOB_XXXXX  0x08        /* free bit */
  27 #define IEOB_XCVRL2 0x04        /* level 2 transceiver? */
  28 #define IEOB_BUSERR 0x02        /* bus error */
  29 #define IEOB_INT    0x01        /* interrupt */
  30
  31 /* where the obio one lives */
  32 #define IE_OBIO 0xc0000
  33 #define IE_IRQ 3
  34
  35 /*
  36  * where to find the System Configuration Pointer (SCP)
  37  */
  38 #define SCP_DEFAULT_ADDRESS 0xfffff4
  39
  40
  41 /*
  42  * System Configuration Pointer Struct
  43  */
  44
  45 struct scp_struct
  46 {
  47   unsigned short zero_dum0;     /* has to be zero */
  48   unsigned char  sysbus;        /* 0=16Bit,1=8Bit */
  49   unsigned char  zero_dum1;     /* has to be zero for 586 */
  50   unsigned short zero_dum2;
  51   unsigned short zero_dum3;
  52   char          *iscp;          /* pointer to the iscp-block */
  53 };
  54
  55
  56 /*
  57  * Intermediate System Configuration Pointer (ISCP)
  58  */
  59 struct iscp_struct
  60 {
  61   unsigned char  busy;          /* 586 clears after successful init */
  62   unsigned char  zero_dummy;    /* has to be zero */
  63   unsigned short scb_offset;    /* pointeroffset to the scb_base */
  64   char          *scb_base;      /* base-address of all 16-bit offsets */
  65 };
  66
  67 /*
  68  * System Control Block (SCB)
  69  */
  70 struct scb_struct
  71 {
  72   unsigned char rus;
  73   unsigned char cus;
  74   unsigned char cmd_ruc;           /* command word: RU part */
  75   unsigned char cmd_cuc;           /* command word: CU part & ACK */
  76   unsigned short cbl_offset;    /* pointeroffset, command block list */
  77   unsigned short rfa_offset;    /* pointeroffset, receive frame area */
  78   unsigned short crc_errs;      /* CRC-Error counter */
  79   unsigned short aln_errs;      /* allignmenterror counter */
  80   unsigned short rsc_errs;      /* Resourceerror counter */
  81   unsigned short ovrn_errs;     /* OVerrunerror counter */
  82 };
  83
  84 /*
  85  * possible command values for the command word
  86  */
  87 #define RUC_MASK        0x0070  /* mask for RU commands */
  88 #define RUC_NOP         0x0000  /* NOP-command */
  89 #define RUC_START       0x0010  /* start RU */
  90 #define RUC_RESUME      0x0020  /* resume RU after suspend */
  91 #define RUC_SUSPEND     0x0030  /* suspend RU */
  92 #define RUC_ABORT       0x0040  /* abort receiver operation immediately */
  93
  94 #define CUC_MASK        0x07  /* mask for CU command */
  95 #define CUC_NOP         0x00  /* NOP-command */
  96 #define CUC_START       0x01  /* start execution of 1. cmd on the CBL */
  97 #define CUC_RESUME      0x02  /* resume after suspend */
  98 #define CUC_SUSPEND     0x03  /* Suspend CU */
  99 #define CUC_ABORT       0x04  /* abort command operation immediately */
 100
 101 #define ACK_MASK        0xf0  /* mask for ACK command */
 102 #define ACK_CX          0x80  /* acknowledges STAT_CX */
 103 #define ACK_FR          0x40  /* ack. STAT_FR */
 104 #define ACK_CNA         0x20  /* ack. STAT_CNA */
 105 #define ACK_RNR         0x10  /* ack. STAT_RNR */
 106
 107 /*
 108  * possible status values for the status word
 109  */
 110 #define STAT_MASK       0xf0  /* mask for cause of interrupt */
 111 #define STAT_CX         0x80  /* CU finished cmd with its I bit set */
 112 #define STAT_FR         0x40  /* RU finished receiving a frame */
 113 #define STAT_CNA        0x20  /* CU left active state */
 114 #define STAT_RNR        0x10  /* RU left ready state */
 115
 116 #define CU_STATUS       0x7   /* CU status, 0=idle */
 117 #define CU_SUSPEND      0x1   /* CU is suspended */
 118 #define CU_ACTIVE       0x2   /* CU is active */
 119
 120 #define RU_STATUS       0x70    /* RU status, 0=idle */
 121 #define RU_SUSPEND      0x10    /* RU suspended */
 122 #define RU_NOSPACE      0x20    /* RU no resources */
 123 #define RU_READY        0x40    /* RU is ready */
 124
 125 /*
 126  * Receive Frame Descriptor (RFD)
 127  */
 128 struct rfd_struct
 129 {
 130   unsigned char  stat_low;      /* status word */
 131   unsigned char  stat_high;     /* status word */
 132   unsigned char  rfd_sf;        /* 82596 mode only */
 133   unsigned char  last;          /* Bit15,Last Frame on List / Bit14,suspend */
 134   unsigned short next;          /* linkoffset to next RFD */
 135   unsigned short rbd_offset;    /* pointeroffset to RBD-buffer */
 136   unsigned char  dest[6];       /* ethernet-address, destination */
 137   unsigned char  source[6];     /* ethernet-address, source */
 138   unsigned short length;        /* 802.3 frame-length */
 139   unsigned short zero_dummy;    /* dummy */
 140 };
 141
 142 #define RFD_LAST     0x80       /* last: last rfd in the list */
 143 #define RFD_SUSP     0x40       /* last: suspend RU after  */
 144 #define RFD_COMPL    0x80
 145 #define RFD_OK       0x20
 146 #define RFD_BUSY     0x40
 147 #define RFD_ERR_LEN  0x10     /* Length error (if enabled length-checking */
 148 #define RFD_ERR_CRC  0x08     /* CRC error */
 149 #define RFD_ERR_ALGN 0x04     /* Alignment error */
 150 #define RFD_ERR_RNR  0x02     /* status: receiver out of resources */
 151 #define RFD_ERR_OVR  0x01     /* DMA Overrun! */
 152
 153 #define RFD_ERR_FTS  0x0080     /* Frame to short */
 154 #define RFD_ERR_NEOP 0x0040     /* No EOP flag (for bitstuffing only) */
 155 #define RFD_ERR_TRUN 0x0020     /* (82596 only/SF mode) indicates truncated frame */
 156 #define RFD_MATCHADD 0x0002     /* status: Destinationaddress !matches IA (only 82596) */
 157 #define RFD_COLLDET  0x0001     /* Detected collision during reception */
 158
 159 /*
 160  * Receive Buffer Descriptor (RBD)
 161  */
 162 struct rbd_struct
 163 {
 164   unsigned short status;        /* status word,number of used bytes in buff */
 165   unsigned short next;          /* pointeroffset to next RBD */
 166   char          *buffer;        /* receive buffer address pointer */
 167   unsigned short size;          /* size of this buffer */
 168   unsigned short zero_dummy;    /* dummy */
 169 };
 170
 171 #define RBD_LAST        0x8000  /* last buffer */
 172 #define RBD_USED        0x4000  /* this buffer has data */
 173 #define RBD_MASK        0x3fff  /* size-mask for length */
 174
 175 /*
 176  * Statusvalues for Commands/RFD
 177  */
 178 #define STAT_COMPL   0x8000     /* status: frame/command is complete */
 179 #define STAT_BUSY    0x4000     /* status: frame/command is busy */
 180 #define STAT_OK      0x2000     /* status: frame/command is ok */
 181
 182 /*
 183  * Action-Commands
 184  */
 185 #define CMD_NOP         0x0000  /* NOP */
 186 #define CMD_IASETUP     0x0001  /* initial address setup command */
 187 #define CMD_CONFIGURE   0x0002  /* configure command */
 188 #define CMD_MCSETUP     0x0003  /* MC setup command */
 189 #define CMD_XMIT        0x0004  /* transmit command */
 190 #define CMD_TDR         0x0005  /* time domain reflectometer (TDR) command */
 191 #define CMD_DUMP        0x0006  /* dump command */
 192 #define CMD_DIAGNOSE    0x0007  /* diagnose command */
 193
 194 /*
 195  * Action command bits
 196  */
 197 #define CMD_LAST        0x8000  /* indicates last command in the CBL */
 198 #define CMD_SUSPEND     0x4000  /* suspend CU after this CB */
 199 #define CMD_INT         0x2000  /* generate interrupt after execution */
 200
 201 /*
 202  * NOP - command
 203  */
 204 struct nop_cmd_struct
 205 {
 206   unsigned short cmd_status;    /* status of this command */
 207   unsigned short cmd_cmd;       /* the command itself (+bits) */
 208   unsigned short cmd_link;      /* offsetpointer to next command */
 209 };
 210
 211 /*
 212  * IA Setup command
 213  */
 214 struct iasetup_cmd_struct
 215 {
 216   unsigned short cmd_status;
 217   unsigned short cmd_cmd;
 218   unsigned short cmd_link;
 219   unsigned char  iaddr[6];
 220 };
 221
 222 /*
 223  * Configure command
 224  */
 225 struct configure_cmd_struct
 226 {
 227   unsigned short cmd_status;
 228   unsigned short cmd_cmd;
 229   unsigned short cmd_link;
 230   unsigned char  byte_cnt;   /* size of the config-cmd */
 231   unsigned char  fifo;       /* fifo/recv monitor */
 232   unsigned char  sav_bf;     /* save bad frames (bit7=1)*/
 233   unsigned char  adr_len;    /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/
 234   unsigned char  priority;   /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */
 235   unsigned char  ifs;        /* inter frame spacing */
 236   unsigned char  time_low;   /* slot time low */
 237   unsigned char  time_high;  /* slot time high(0-2) and max. retries(4-7) */
 238   unsigned char  promisc;    /* promisc-mode(0) , et al (1-7) */
 239   unsigned char  carr_coll;  /* carrier(0-3)/collision(4-7) stuff */
 240   unsigned char  fram_len;   /* minimal frame len */
 241   unsigned char  dummy;      /* dummy */
 242 };
 243
 244 /*
 245  * Multicast Setup command
 246  */
 247 struct mcsetup_cmd_struct
 248 {
 249   unsigned short cmd_status;
 250   unsigned short cmd_cmd;
 251   unsigned short cmd_link;
 252   unsigned short mc_cnt;                /* number of bytes in the MC-List */
 253   unsigned char  mc_list[0][6];         /* pointer to 6 bytes entries */
 254 };
 255
 256 /*
 257  * DUMP command
 258  */
 259 struct dump_cmd_struct
 260 {
 261   unsigned short cmd_status;
 262   unsigned short cmd_cmd;
 263   unsigned short cmd_link;
 264   unsigned short dump_offset;    /* pointeroffset to DUMP space */
 265 };
 266
 267 /*
 268  * transmit command
 269  */
 270 struct transmit_cmd_struct
 271 {
 272   unsigned short cmd_status;
 273   unsigned short cmd_cmd;
 274   unsigned short cmd_link;
 275   unsigned short tbd_offset;    /* pointeroffset to TBD */
 276   unsigned char  dest[6];       /* destination address of the frame */
 277   unsigned short length;        /* user defined: 802.3 length / Ether type */
 278 };
 279
 280 #define TCMD_ERRMASK     0x0fa0
 281 #define TCMD_MAXCOLLMASK 0x000f
 282 #define TCMD_MAXCOLL     0x0020
 283 #define TCMD_HEARTBEAT   0x0040
 284 #define TCMD_DEFERRED    0x0080
 285 #define TCMD_UNDERRUN    0x0100
 286 #define TCMD_LOSTCTS     0x0200
 287 #define TCMD_NOCARRIER   0x0400
 288 #define TCMD_LATECOLL    0x0800
 289
 290 struct tdr_cmd_struct
 291 {
 292   unsigned short cmd_status;
 293   unsigned short cmd_cmd;
 294   unsigned short cmd_link;
 295   unsigned short status;
 296 };
 297
 298 #define TDR_LNK_OK      0x8000  /* No link problem identified */
 299 #define TDR_XCVR_PRB    0x4000  /* indicates a transceiver problem */
 300 #define TDR_ET_OPN      0x2000  /* open, no correct termination */
 301 #define TDR_ET_SRT      0x1000  /* TDR detected a short circuit */
 302 #define TDR_TIMEMASK    0x07ff  /* mask for the time field */
 303
 304 /*
 305  * Transmit Buffer Descriptor (TBD)
 306  */
 307 struct tbd_struct
 308 {
 309   unsigned short size;          /* size + EOF-Flag(15) */
 310   unsigned short next;          /* pointeroffset to next TBD */
 311   char          *buffer;        /* pointer to buffer */
 312 };
 313
 314 #define TBD_LAST 0x8000         /* EOF-Flag, indicates last buffer in list */
 315
 316
 317
 318