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 45struct 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 */ 59struct 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 */ 70struct 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 */ 128struct 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[ETH_ALEN]; /* ethernet-address, destination */ 137 unsigned char source[ETH_ALEN]; /* 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 */ 162struct 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 */ 204struct 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 */ 214struct 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 */ 225struct 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 */ 247struct 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 */ 259struct 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 */ 270struct 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 290struct 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 */ 307struct 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 */ 315 316 317 318 319