drivers/net/ethernet/i825xx/3c523.h

   1 #ifndef _3c523_INCLUDE_
   2 #define _3c523_INCLUDE_
   3 /*
   4         This is basically a hacked version of ni52.h, for the 3c523
   5         Etherlink/MC.
   6 */
   7
   8 /*
   9  * Intel i82586 Ethernet definitions
  10  *
  11  * This is an extension to the Linux operating system, and is covered by the
  12  * same GNU General Public License that covers that work.
  13  *
  14  * Copyright 1995 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca)
  15  *
  16  * See 3c523.c for details.
  17  *
  18  * $Header: /home/chrisb/linux-1.2.13-3c523/drivers/net/RCS/3c523.h,v 1.6 1996/01/20 05:09:00 chrisb Exp chrisb $
  19  */
  20
  21 /*
  22  * where to find the System Configuration Pointer (SCP)
  23  */
  24 #define SCP_DEFAULT_ADDRESS 0xfffff4
  25
  26
  27 /*
  28  * System Configuration Pointer Struct
  29  */
  30
  31 struct scp_struct
  32 {
  33   unsigned short zero_dum0;     /* has to be zero */
  34   unsigned char  sysbus;        /* 0=16Bit,1=8Bit */
  35   unsigned char  zero_dum1;     /* has to be zero for 586 */
  36   unsigned short zero_dum2;
  37   unsigned short zero_dum3;
  38   char          *iscp;          /* pointer to the iscp-block */
  39 };
  40
  41
  42 /*
  43  * Intermediate System Configuration Pointer (ISCP)
  44  */
  45 struct iscp_struct
  46 {
  47   unsigned char  busy;          /* 586 clears after successful init */
  48   unsigned char  zero_dummy;    /* hast to be zero */
  49   unsigned short scb_offset;    /* pointeroffset to the scb_base */
  50   char          *scb_base;      /* base-address of all 16-bit offsets */
  51 };
  52
  53 /*
  54  * System Control Block (SCB)
  55  */
  56 struct scb_struct
  57 {
  58   unsigned short status;        /* status word */
  59   unsigned short cmd;           /* command word */
  60   unsigned short cbl_offset;    /* pointeroffset, command block list */
  61   unsigned short rfa_offset;    /* pointeroffset, receive frame area */
  62   unsigned short crc_errs;      /* CRC-Error counter */
  63   unsigned short aln_errs;      /* alignmenterror counter */
  64   unsigned short rsc_errs;      /* Resourceerror counter */
  65   unsigned short ovrn_errs;     /* OVerrunerror counter */
  66 };
  67
  68 /*
  69  * possible command values for the command word
  70  */
  71 #define RUC_MASK        0x0070  /* mask for RU commands */
  72 #define RUC_NOP         0x0000  /* NOP-command */
  73 #define RUC_START       0x0010  /* start RU */
  74 #define RUC_RESUME      0x0020  /* resume RU after suspend */
  75 #define RUC_SUSPEND     0x0030  /* suspend RU */
  76 #define RUC_ABORT       0x0040  /* abort receiver operation immediately */
  77
  78 #define CUC_MASK        0x0700  /* mask for CU command */
  79 #define CUC_NOP         0x0000  /* NOP-command */
  80 #define CUC_START       0x0100  /* start execution of 1. cmd on the CBL */
  81 #define CUC_RESUME      0x0200  /* resume after suspend */
  82 #define CUC_SUSPEND     0x0300  /* Suspend CU */
  83 #define CUC_ABORT       0x0400  /* abort command operation immediately */
  84
  85 #define ACK_MASK        0xf000  /* mask for ACK command */
  86 #define ACK_CX          0x8000  /* acknowledges STAT_CX */
  87 #define ACK_FR          0x4000  /* ack. STAT_FR */
  88 #define ACK_CNA         0x2000  /* ack. STAT_CNA */
  89 #define ACK_RNR         0x1000  /* ack. STAT_RNR */
  90
  91 /*
  92  * possible status values for the status word
  93  */
  94 #define STAT_MASK       0xf000  /* mask for cause of interrupt */
  95 #define STAT_CX         0x8000  /* CU finished cmd with its I bit set */
  96 #define STAT_FR         0x4000  /* RU finished receiving a frame */
  97 #define STAT_CNA        0x2000  /* CU left active state */
  98 #define STAT_RNR        0x1000  /* RU left ready state */
  99
 100 #define CU_STATUS       0x700   /* CU status, 0=idle */
 101 #define CU_SUSPEND      0x100   /* CU is suspended */
 102 #define CU_ACTIVE       0x200   /* CU is active */
 103
 104 #define RU_STATUS       0x70    /* RU status, 0=idle */
 105 #define RU_SUSPEND      0x10    /* RU suspended */
 106 #define RU_NOSPACE      0x20    /* RU no resources */
 107 #define RU_READY        0x40    /* RU is ready */
 108
 109 /*
 110  * Receive Frame Descriptor (RFD)
 111  */
 112 struct rfd_struct
 113 {
 114   unsigned short status;        /* status word */
 115   unsigned short last;          /* Bit15,Last Frame on List / Bit14,suspend */
 116   unsigned short next;          /* linkoffset to next RFD */
 117   unsigned short rbd_offset;    /* pointeroffset to RBD-buffer */
 118   unsigned char  dest[6];       /* ethernet-address, destination */
 119   unsigned char  source[6];     /* ethernet-address, source */
 120   unsigned short length;        /* 802.3 frame-length */
 121   unsigned short zero_dummy;    /* dummy */
 122 };
 123
 124 #define RFD_LAST     0x8000     /* last: last rfd in the list */
 125 #define RFD_SUSP     0x4000     /* last: suspend RU after  */
 126 #define RFD_ERRMASK  0x0fe1     /* status: errormask */
 127 #define RFD_MATCHADD 0x0002     /* status: Destinationaddress !matches IA */
 128 #define RFD_RNR      0x0200     /* status: receiver out of resources */
 129
 130 /*
 131  * Receive Buffer Descriptor (RBD)
 132  */
 133 struct rbd_struct
 134 {
 135   unsigned short status;        /* status word,number of used bytes in buff */
 136   unsigned short next;          /* pointeroffset to next RBD */
 137   char          *buffer;        /* receive buffer address pointer */
 138   unsigned short size;          /* size of this buffer */
 139   unsigned short zero_dummy;    /* dummy */
 140 };
 141
 142 #define RBD_LAST        0x8000  /* last buffer */
 143 #define RBD_USED        0x4000  /* this buffer has data */
 144 #define RBD_MASK        0x3fff  /* size-mask for length */
 145
 146 /*
 147  * Statusvalues for Commands/RFD
 148  */
 149 #define STAT_COMPL   0x8000     /* status: frame/command is complete */
 150 #define STAT_BUSY    0x4000     /* status: frame/command is busy */
 151 #define STAT_OK      0x2000     /* status: frame/command is ok */
 152
 153 /*
 154  * Action-Commands
 155  */
 156 #define CMD_NOP         0x0000  /* NOP */
 157 #define CMD_IASETUP     0x0001  /* initial address setup command */
 158 #define CMD_CONFIGURE   0x0002  /* configure command */
 159 #define CMD_MCSETUP     0x0003  /* MC setup command */
 160 #define CMD_XMIT        0x0004  /* transmit command */
 161 #define CMD_TDR         0x0005  /* time domain reflectometer (TDR) command */
 162 #define CMD_DUMP        0x0006  /* dump command */
 163 #define CMD_DIAGNOSE    0x0007  /* diagnose command */
 164
 165 /*
 166  * Action command bits
 167  */
 168 #define CMD_LAST        0x8000  /* indicates last command in the CBL */
 169 #define CMD_SUSPEND     0x4000  /* suspend CU after this CB */
 170 #define CMD_INT         0x2000  /* generate interrupt after execution */
 171
 172 /*
 173  * NOP - command
 174  */
 175 struct nop_cmd_struct
 176 {
 177   unsigned short cmd_status;    /* status of this command */
 178   unsigned short cmd_cmd;       /* the command itself (+bits) */
 179   unsigned short cmd_link;      /* offsetpointer to next command */
 180 };
 181
 182 /*
 183  * IA Setup command
 184  */
 185 struct iasetup_cmd_struct
 186 {
 187   unsigned short cmd_status;
 188   unsigned short cmd_cmd;
 189   unsigned short cmd_link;
 190   unsigned char  iaddr[6];
 191 };
 192
 193 /*
 194  * Configure command
 195  */
 196 struct configure_cmd_struct
 197 {
 198   unsigned short cmd_status;
 199   unsigned short cmd_cmd;
 200   unsigned short cmd_link;
 201   unsigned char  byte_cnt;   /* size of the config-cmd */
 202   unsigned char  fifo;       /* fifo/recv monitor */
 203   unsigned char  sav_bf;     /* save bad frames (bit7=1)*/
 204   unsigned char  adr_len;    /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/
 205   unsigned char  priority;   /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */
 206   unsigned char  ifs;        /* inter frame spacing */
 207   unsigned char  time_low;   /* slot time low */
 208   unsigned char  time_high;  /* slot time high(0-2) and max. retries(4-7) */
 209   unsigned char  promisc;    /* promisc-mode(0) , et al (1-7) */
 210   unsigned char  carr_coll;  /* carrier(0-3)/collision(4-7) stuff */
 211   unsigned char  fram_len;   /* minimal frame len */
 212   unsigned char  dummy;      /* dummy */
 213 };
 214
 215 /*
 216  * Multicast Setup command
 217  */
 218 struct mcsetup_cmd_struct
 219 {
 220   unsigned short cmd_status;
 221   unsigned short cmd_cmd;
 222   unsigned short cmd_link;
 223   unsigned short mc_cnt;                /* number of bytes in the MC-List */
 224   unsigned char  mc_list[0][6];         /* pointer to 6 bytes entries */
 225 };
 226
 227 /*
 228  * transmit command
 229  */
 230 struct transmit_cmd_struct
 231 {
 232   unsigned short cmd_status;
 233   unsigned short cmd_cmd;
 234   unsigned short cmd_link;
 235   unsigned short tbd_offset;    /* pointeroffset to TBD */
 236   unsigned char  dest[6];       /* destination address of the frame */
 237   unsigned short length;        /* user defined: 802.3 length / Ether type */
 238 };
 239
 240 #define TCMD_ERRMASK     0x0fa0
 241 #define TCMD_MAXCOLLMASK 0x000f
 242 #define TCMD_MAXCOLL     0x0020
 243 #define TCMD_HEARTBEAT   0x0040
 244 #define TCMD_DEFERRED    0x0080
 245 #define TCMD_UNDERRUN    0x0100
 246 #define TCMD_LOSTCTS     0x0200
 247 #define TCMD_NOCARRIER   0x0400
 248 #define TCMD_LATECOLL    0x0800
 249
 250 struct tdr_cmd_struct
 251 {
 252   unsigned short cmd_status;
 253   unsigned short cmd_cmd;
 254   unsigned short cmd_link;
 255   unsigned short status;
 256 };
 257
 258 #define TDR_LNK_OK      0x8000  /* No link problem identified */
 259 #define TDR_XCVR_PRB    0x4000  /* indicates a transceiver problem */
 260 #define TDR_ET_OPN      0x2000  /* open, no correct termination */
 261 #define TDR_ET_SRT      0x1000  /* TDR detected a short circuit */
 262 #define TDR_TIMEMASK    0x07ff  /* mask for the time field */
 263
 264 /*
 265  * Transmit Buffer Descriptor (TBD)
 266  */
 267 struct tbd_struct
 268 {
 269   unsigned short size;          /* size + EOF-Flag(15) */
 270   unsigned short next;          /* pointeroffset to next TBD */
 271   char          *buffer;        /* pointer to buffer */
 272 };
 273
 274 #define TBD_LAST 0x8000         /* EOF-Flag, indicates last buffer in list */
 275
 276 /*************************************************************************/
 277 /*
 278 Verbatim from the Crynwyr stuff:
 279
 280     The 3c523 responds with adapter code 0x6042 at slot
 281 registers xxx0 and xxx1.  The setup register is at xxx2 and
 282 contains the following bits:
 283
 284 0: card enable
 285 2,1: csr address select
 286     00 = 0300
 287     01 = 1300
 288     10 = 2300
 289     11 = 3300
 290 4,3: shared memory address select
 291     00 = 0c0000
 292     01 = 0c8000
 293     10 = 0d0000
 294     11 = 0d8000
 295 5: set to disable on-board thinnet
 296 7,6: (read-only) shows selected irq
 297     00 = 12
 298     01 = 7
 299     10 = 3
 300     11 = 9
 301
 302 The interrupt-select register is at xxx3 and uses one bit per irq.
 303
 304 0: int 12
 305 1: int 7
 306 2: int 3
 307 3: int 9
 308
 309     Again, the documentation stresses that the setup register
 310 should never be written.  The interrupt-select register may be
 311 written with the value corresponding to bits 7.6 in
 312 the setup register to insure corret setup.
 313 */
 314
 315 /* Offsets from the base I/O address. */
 316 #define ELMC_SA         0       /* first 6 bytes are IEEE network address */
 317 #define ELMC_CTRL       6       /* control & status register */
 318 #define ELMC_REVISION   7       /* revision register, first 4 bits only */
 319 #define ELMC_IO_EXTENT  8
 320
 321 /* these are the bit selects for the port register 2 */
 322 #define ELMC_STATUS_ENABLED     0x01
 323 #define ELMC_STATUS_CSR_SELECT  0x06
 324 #define ELMC_STATUS_MEMORY_SELECT       0x18
 325 #define ELMC_STATUS_DISABLE_THIN        0x20
 326 #define ELMC_STATUS_IRQ_SELECT  0xc0
 327
 328 /* this is the card id used in the detection code.  You might recognize
 329 it from @6042.adf */
 330 #define ELMC_MCA_ID 0x6042
 331
 332 /*
 333    The following define the bits for the control & status register
 334
 335    The bank select registers can be used if more than 16K of memory is
 336    on the card.  For some stupid reason, bank 3 is the one for the
 337    bottom 16K, and the card defaults to bank 0.  So we have to set the
 338    bank to 3 before the card will even think of operating.  To get bank
 339    3, set BS0 and BS1 to high (of course...)
 340 */
 341 #define ELMC_CTRL_BS0   0x01    /* RW bank select */
 342 #define ELMC_CTRL_BS1   0x02    /* RW bank select */
 343 #define ELMC_CTRL_INTE  0x04    /* RW interrupt enable, assert high */
 344 #define ELMC_CTRL_INT   0x08    /* R interrupt active, assert high */
 345 /*#define ELMC_CTRL_*   0x10*/  /* reserved */
 346 #define ELMC_CTRL_LBK   0x20    /* RW loopback enable, assert high */
 347 #define ELMC_CTRL_CA    0x40    /* RW channel attention, assert high */
 348 #define ELMC_CTRL_RST   0x80    /* RW 82586 reset, assert low */
 349
 350 /* some handy compound bits */
 351
 352 /* normal operation should have bank 3 and RST high, ints enabled */
 353 #define ELMC_NORMAL (ELMC_CTRL_INTE|ELMC_CTRL_RST|0x3)
 354
 355 #endif /* _3c523_INCLUDE_ */