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311 lines
9.8 KiB
C
311 lines
9.8 KiB
C
/*
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* Intel i82586 Ethernet definitions
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*
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* This is an extension to the Linux operating system, and is covered by the
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* same GNU General Public License that covers that work.
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*
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* copyrights (c) 1994 by Michael Hipp (hippm@informatik.uni-tuebingen.de)
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*
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* I have done a look in the following sources:
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* crynwr-packet-driver by Russ Nelson
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* Garret A. Wollman's i82586-driver for BSD
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*/
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#define NI52_RESET 0 /* writing to this address, resets the i82586 */
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#define NI52_ATTENTION 1 /* channel attention, kick the 586 */
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#define NI52_TENA 3 /* 2-5 possibly wrong, Xmit enable */
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#define NI52_TDIS 2 /* Xmit disable */
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#define NI52_INTENA 5 /* Interrupt enable */
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#define NI52_INTDIS 4 /* Interrupt disable */
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#define NI52_MAGIC1 6 /* dunno exact function */
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#define NI52_MAGIC2 7 /* dunno exact function */
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#define NI52_MAGICVAL1 0x00 /* magic-values for ni5210 card */
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#define NI52_MAGICVAL2 0x55
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/*
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* where to find the System Configuration Pointer (SCP)
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*/
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#define SCP_DEFAULT_ADDRESS 0xfffff4
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/*
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* System Configuration Pointer Struct
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*/
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struct scp_struct
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{
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unsigned short zero_dum0; /* has to be zero */
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unsigned char sysbus; /* 0=16Bit,1=8Bit */
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unsigned char zero_dum1; /* has to be zero for 586 */
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unsigned short zero_dum2;
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unsigned short zero_dum3;
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char *iscp; /* pointer to the iscp-block */
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};
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/*
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* Intermediate System Configuration Pointer (ISCP)
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*/
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struct iscp_struct
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{
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unsigned char busy; /* 586 clears after successful init */
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unsigned char zero_dummy; /* has to be zero */
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unsigned short scb_offset; /* pointeroffset to the scb_base */
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char *scb_base; /* base-address of all 16-bit offsets */
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};
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/*
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* System Control Block (SCB)
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*/
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struct scb_struct
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{
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unsigned char rus;
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unsigned char cus;
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unsigned char cmd_ruc; /* command word: RU part */
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unsigned char cmd_cuc; /* command word: CU part & ACK */
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unsigned short cbl_offset; /* pointeroffset, command block list */
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unsigned short rfa_offset; /* pointeroffset, receive frame area */
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unsigned short crc_errs; /* CRC-Error counter */
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unsigned short aln_errs; /* alignmenterror counter */
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unsigned short rsc_errs; /* Resourceerror counter */
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unsigned short ovrn_errs; /* OVerrunerror counter */
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};
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/*
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* possible command values for the command word
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*/
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#define RUC_MASK 0x0070 /* mask for RU commands */
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#define RUC_NOP 0x0000 /* NOP-command */
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#define RUC_START 0x0010 /* start RU */
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#define RUC_RESUME 0x0020 /* resume RU after suspend */
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#define RUC_SUSPEND 0x0030 /* suspend RU */
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#define RUC_ABORT 0x0040 /* abort receiver operation immediately */
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#define CUC_MASK 0x07 /* mask for CU command */
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#define CUC_NOP 0x00 /* NOP-command */
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#define CUC_START 0x01 /* start execution of 1. cmd on the CBL */
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#define CUC_RESUME 0x02 /* resume after suspend */
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#define CUC_SUSPEND 0x03 /* Suspend CU */
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#define CUC_ABORT 0x04 /* abort command operation immediately */
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#define ACK_MASK 0xf0 /* mask for ACK command */
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#define ACK_CX 0x80 /* acknowledges STAT_CX */
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#define ACK_FR 0x40 /* ack. STAT_FR */
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#define ACK_CNA 0x20 /* ack. STAT_CNA */
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#define ACK_RNR 0x10 /* ack. STAT_RNR */
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/*
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* possible status values for the status word
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*/
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#define STAT_MASK 0xf0 /* mask for cause of interrupt */
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#define STAT_CX 0x80 /* CU finished cmd with its I bit set */
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#define STAT_FR 0x40 /* RU finished receiving a frame */
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#define STAT_CNA 0x20 /* CU left active state */
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#define STAT_RNR 0x10 /* RU left ready state */
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#define CU_STATUS 0x7 /* CU status, 0=idle */
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#define CU_SUSPEND 0x1 /* CU is suspended */
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#define CU_ACTIVE 0x2 /* CU is active */
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#define RU_STATUS 0x70 /* RU status, 0=idle */
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#define RU_SUSPEND 0x10 /* RU suspended */
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#define RU_NOSPACE 0x20 /* RU no resources */
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#define RU_READY 0x40 /* RU is ready */
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/*
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* Receive Frame Descriptor (RFD)
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*/
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struct rfd_struct
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{
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unsigned char stat_low; /* status word */
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unsigned char stat_high; /* status word */
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unsigned char rfd_sf; /* 82596 mode only */
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unsigned char last; /* Bit15,Last Frame on List / Bit14,suspend */
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unsigned short next; /* linkoffset to next RFD */
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unsigned short rbd_offset; /* pointeroffset to RBD-buffer */
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unsigned char dest[6]; /* ethernet-address, destination */
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unsigned char source[6]; /* ethernet-address, source */
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unsigned short length; /* 802.3 frame-length */
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unsigned short zero_dummy; /* dummy */
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};
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#define RFD_LAST 0x80 /* last: last rfd in the list */
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#define RFD_SUSP 0x40 /* last: suspend RU after */
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#define RFD_COMPL 0x80
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#define RFD_OK 0x20
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#define RFD_BUSY 0x40
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#define RFD_ERR_LEN 0x10 /* Length error (if enabled length-checking */
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#define RFD_ERR_CRC 0x08 /* CRC error */
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#define RFD_ERR_ALGN 0x04 /* Alignment error */
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#define RFD_ERR_RNR 0x02 /* status: receiver out of resources */
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#define RFD_ERR_OVR 0x01 /* DMA Overrun! */
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#define RFD_ERR_FTS 0x0080 /* Frame to short */
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#define RFD_ERR_NEOP 0x0040 /* No EOP flag (for bitstuffing only) */
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#define RFD_ERR_TRUN 0x0020 /* (82596 only/SF mode) indicates truncated frame */
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#define RFD_MATCHADD 0x0002 /* status: Destinationaddress !matches IA (only 82596) */
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#define RFD_COLLDET 0x0001 /* Detected collision during reception */
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/*
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* Receive Buffer Descriptor (RBD)
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*/
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struct rbd_struct
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{
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unsigned short status; /* status word,number of used bytes in buff */
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unsigned short next; /* pointeroffset to next RBD */
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char *buffer; /* receive buffer address pointer */
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unsigned short size; /* size of this buffer */
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unsigned short zero_dummy; /* dummy */
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};
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#define RBD_LAST 0x8000 /* last buffer */
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#define RBD_USED 0x4000 /* this buffer has data */
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#define RBD_MASK 0x3fff /* size-mask for length */
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/*
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* Statusvalues for Commands/RFD
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*/
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#define STAT_COMPL 0x8000 /* status: frame/command is complete */
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#define STAT_BUSY 0x4000 /* status: frame/command is busy */
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#define STAT_OK 0x2000 /* status: frame/command is ok */
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/*
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* Action-Commands
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*/
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#define CMD_NOP 0x0000 /* NOP */
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#define CMD_IASETUP 0x0001 /* initial address setup command */
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#define CMD_CONFIGURE 0x0002 /* configure command */
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#define CMD_MCSETUP 0x0003 /* MC setup command */
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#define CMD_XMIT 0x0004 /* transmit command */
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#define CMD_TDR 0x0005 /* time domain reflectometer (TDR) command */
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#define CMD_DUMP 0x0006 /* dump command */
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#define CMD_DIAGNOSE 0x0007 /* diagnose command */
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/*
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* Action command bits
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*/
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#define CMD_LAST 0x8000 /* indicates last command in the CBL */
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#define CMD_SUSPEND 0x4000 /* suspend CU after this CB */
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#define CMD_INT 0x2000 /* generate interrupt after execution */
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/*
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* NOP - command
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*/
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struct nop_cmd_struct
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{
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unsigned short cmd_status; /* status of this command */
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unsigned short cmd_cmd; /* the command itself (+bits) */
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unsigned short cmd_link; /* offsetpointer to next command */
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};
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/*
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* IA Setup command
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*/
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struct iasetup_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned char iaddr[6];
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};
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/*
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* Configure command
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*/
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struct configure_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned char byte_cnt; /* size of the config-cmd */
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unsigned char fifo; /* fifo/recv monitor */
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unsigned char sav_bf; /* save bad frames (bit7=1)*/
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unsigned char adr_len; /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/
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unsigned char priority; /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */
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unsigned char ifs; /* inter frame spacing */
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unsigned char time_low; /* slot time low */
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unsigned char time_high; /* slot time high(0-2) and max. retries(4-7) */
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unsigned char promisc; /* promisc-mode(0) , et al (1-7) */
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unsigned char carr_coll; /* carrier(0-3)/collision(4-7) stuff */
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unsigned char fram_len; /* minimal frame len */
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unsigned char dummy; /* dummy */
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};
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/*
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* Multicast Setup command
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*/
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struct mcsetup_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned short mc_cnt; /* number of bytes in the MC-List */
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unsigned char mc_list[0][6]; /* pointer to 6 bytes entries */
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};
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/*
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* DUMP command
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*/
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struct dump_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned short dump_offset; /* pointeroffset to DUMP space */
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};
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/*
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* transmit command
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*/
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struct transmit_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned short tbd_offset; /* pointeroffset to TBD */
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unsigned char dest[6]; /* destination address of the frame */
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unsigned short length; /* user defined: 802.3 length / Ether type */
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};
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#define TCMD_ERRMASK 0x0fa0
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#define TCMD_MAXCOLLMASK 0x000f
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#define TCMD_MAXCOLL 0x0020
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#define TCMD_HEARTBEAT 0x0040
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#define TCMD_DEFERRED 0x0080
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#define TCMD_UNDERRUN 0x0100
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#define TCMD_LOSTCTS 0x0200
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#define TCMD_NOCARRIER 0x0400
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#define TCMD_LATECOLL 0x0800
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struct tdr_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned short status;
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};
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#define TDR_LNK_OK 0x8000 /* No link problem identified */
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#define TDR_XCVR_PRB 0x4000 /* indicates a transceiver problem */
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#define TDR_ET_OPN 0x2000 /* open, no correct termination */
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#define TDR_ET_SRT 0x1000 /* TDR detected a short circuit */
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#define TDR_TIMEMASK 0x07ff /* mask for the time field */
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/*
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* Transmit Buffer Descriptor (TBD)
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*/
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struct tbd_struct
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{
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unsigned short size; /* size + EOF-Flag(15) */
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unsigned short next; /* pointeroffset to next TBD */
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char *buffer; /* pointer to buffer */
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};
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#define TBD_LAST 0x8000 /* EOF-Flag, indicates last buffer in list */
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