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/* * Intel i82586 Ethernet definitions * * This is an extension to the Linux operating system, and is covered by the * same GNU General Public License that covers that work. * * copyrights (c) 1994 by Michael Hipp (hippm@informatik.uni-tuebingen.de) * * I have done a look in the following sources: * crynwr-packet-driver by Russ Nelson * Garret A. Wollman's i82586-driver for BSD */ #define NI52_RESET 0 /* writing to this address, resets the i82586 */ #define NI52_ATTENTION 1 /* channel attention, kick the 586 */ #define NI52_TENA 3 /* 2-5 possibly wrong, Xmit enable */ #define NI52_TDIS 2 /* Xmit disable */ #define NI52_INTENA 5 /* Interrupt enable */ #define NI52_INTDIS 4 /* Interrupt disable */ #define NI52_MAGIC1 6 /* dunno exact function */ #define NI52_MAGIC2 7 /* dunno exact function */ #define NI52_MAGICVAL1 0x00 /* magic-values for ni5210 card */ #define NI52_MAGICVAL2 0x55 /* * where to find the System Configuration Pointer (SCP) */ #define SCP_DEFAULT_ADDRESS 0xfffff4 /* * System Configuration Pointer Struct */ struct scp_struct { unsigned short zero_dum0; /* has to be zero */ unsigned char sysbus; /* 0=16Bit,1=8Bit */ unsigned char zero_dum1; /* has to be zero for 586 */ unsigned short zero_dum2; unsigned short zero_dum3; char *iscp; /* pointer to the iscp-block */ }; /* * Intermediate System Configuration Pointer (ISCP) */ struct iscp_struct { unsigned char busy; /* 586 clears after successful init */ unsigned char zero_dummy; /* has to be zero */ unsigned short scb_offset; /* pointeroffset to the scb_base */ char *scb_base; /* base-address of all 16-bit offsets */ }; /* * System Control Block (SCB) */ struct scb_struct { unsigned char rus; unsigned char cus; unsigned char cmd_ruc; /* command word: RU part */ unsigned char cmd_cuc; /* command word: CU part & ACK */ unsigned short cbl_offset; /* pointeroffset, command block list */ unsigned short rfa_offset; /* pointeroffset, receive frame area */ unsigned short crc_errs; /* CRC-Error counter */ unsigned short aln_errs; /* alignmenterror counter */ unsigned short rsc_errs; /* Resourceerror counter */ unsigned short ovrn_errs; /* OVerrunerror counter */ }; /* * possible command values for the command word */ #define RUC_MASK 0x0070 /* mask for RU commands */ #define RUC_NOP 0x0000 /* NOP-command */ #define RUC_START 0x0010 /* start RU */ #define RUC_RESUME 0x0020 /* resume RU after suspend */ #define RUC_SUSPEND 0x0030 /* suspend RU */ #define RUC_ABORT 0x0040 /* abort receiver operation immediately */ #define CUC_MASK 0x07 /* mask for CU command */ #define CUC_NOP 0x00 /* NOP-command */ #define CUC_START 0x01 /* start execution of 1. cmd on the CBL */ #define CUC_RESUME 0x02 /* resume after suspend */ #define CUC_SUSPEND 0x03 /* Suspend CU */ #define CUC_ABORT 0x04 /* abort command operation immediately */ #define ACK_MASK 0xf0 /* mask for ACK command */ #define ACK_CX 0x80 /* acknowledges STAT_CX */ #define ACK_FR 0x40 /* ack. STAT_FR */ #define ACK_CNA 0x20 /* ack. STAT_CNA */ #define ACK_RNR 0x10 /* ack. STAT_RNR */ /* * possible status values for the status word */ #define STAT_MASK 0xf0 /* mask for cause of interrupt */ #define STAT_CX 0x80 /* CU finished cmd with its I bit set */ #define STAT_FR 0x40 /* RU finished receiving a frame */ #define STAT_CNA 0x20 /* CU left active state */ #define STAT_RNR 0x10 /* RU left ready state */ #define CU_STATUS 0x7 /* CU status, 0=idle */ #define CU_SUSPEND 0x1 /* CU is suspended */ #define CU_ACTIVE 0x2 /* CU is active */ #define RU_STATUS 0x70 /* RU status, 0=idle */ #define RU_SUSPEND 0x10 /* RU suspended */ #define RU_NOSPACE 0x20 /* RU no resources */ #define RU_READY 0x40 /* RU is ready */ /* * Receive Frame Descriptor (RFD) */ struct rfd_struct { unsigned char stat_low; /* status word */ unsigned char stat_high; /* status word */ unsigned char rfd_sf; /* 82596 mode only */ unsigned char last; /* Bit15,Last Frame on List / Bit14,suspend */ unsigned short next; /* linkoffset to next RFD */ unsigned short rbd_offset; /* pointeroffset to RBD-buffer */ unsigned char dest[6]; /* ethernet-address, destination */ unsigned char source[6]; /* ethernet-address, source */ unsigned short length; /* 802.3 frame-length */ unsigned short zero_dummy; /* dummy */ }; #define RFD_LAST 0x80 /* last: last rfd in the list */ #define RFD_SUSP 0x40 /* last: suspend RU after */ #define RFD_COMPL 0x80 #define RFD_OK 0x20 #define RFD_BUSY 0x40 #define RFD_ERR_LEN 0x10 /* Length error (if enabled length-checking */ #define RFD_ERR_CRC 0x08 /* CRC error */ #define RFD_ERR_ALGN 0x04 /* Alignment error */ #define RFD_ERR_RNR 0x02 /* status: receiver out of resources */ #define RFD_ERR_OVR 0x01 /* DMA Overrun! */ #define RFD_ERR_FTS 0x0080 /* Frame to short */ #define RFD_ERR_NEOP 0x0040 /* No EOP flag (for bitstuffing only) */ #define RFD_ERR_TRUN 0x0020 /* (82596 only/SF mode) indicates truncated frame */ #define RFD_MATCHADD 0x0002 /* status: Destinationaddress !matches IA (only 82596) */ #define RFD_COLLDET 0x0001 /* Detected collision during reception */ /* * Receive Buffer Descriptor (RBD) */ struct rbd_struct { unsigned short status; /* status word,number of used bytes in buff */ unsigned short next; /* pointeroffset to next RBD */ char *buffer; /* receive buffer address pointer */ unsigned short size; /* size of this buffer */ unsigned short zero_dummy; /* dummy */ }; #define RBD_LAST 0x8000 /* last buffer */ #define RBD_USED 0x4000 /* this buffer has data */ #define RBD_MASK 0x3fff /* size-mask for length */ /* * Statusvalues for Commands/RFD */ #define STAT_COMPL 0x8000 /* status: frame/command is complete */ #define STAT_BUSY 0x4000 /* status: frame/command is busy */ #define STAT_OK 0x2000 /* status: frame/command is ok */ /* * Action-Commands */ #define CMD_NOP 0x0000 /* NOP */ #define CMD_IASETUP 0x0001 /* initial address setup command */ #define CMD_CONFIGURE 0x0002 /* configure command */


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