[net-next-2.6.git] / drivers / net / sun3_82586.h

/*
 * Intel i82586 Ethernet definitions
 *
 * This is an extension to the Linux operating system, and is covered by the
 * same Gnu 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
 */

/*
 * Cloned from ni52.h, copyright as above.
 *
 * Modified for Sun3 OBIO i82586 by Sam Creasey (sammy@sammy.net)
 */


/* defines for the obio chip (not vme) */
#define IEOB_NORSET 0x80        /* don't reset the board */
#define IEOB_ONAIR  0x40        /* put us on the air */
#define IEOB_ATTEN  0x20        /* attention! */
#define IEOB_IENAB  0x10        /* interrupt enable */
#define IEOB_XXXXX  0x08        /* free bit */
#define IEOB_XCVRL2 0x04        /* level 2 transceiver? */
#define IEOB_BUSERR 0x02        /* bus error */
#define IEOB_INT    0x01        /* interrupt */

/* where the obio one lives */
#define IE_OBIO 0xc0000
#define IE_IRQ 3

/*
 * 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;      /* allignmenterror 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 */
#define CMD_MCSETUP	0x0003	/* MC setup command */
#define CMD_XMIT	0x0004	/* transmit command */
#define CMD_TDR		0x0005	/* time domain reflectometer (TDR) command */
#define CMD_DUMP	0x0006	/* dump command */
#define CMD_DIAGNOSE	0x0007	/* diagnose command */

/*
 * Action command bits
 */
#define CMD_LAST	0x8000	/* indicates last command in the CBL */
#define CMD_SUSPEND	0x4000	/* suspend CU after this CB */
#define CMD_INT		0x2000	/* generate interrupt after execution */

/*
 * NOP - command
 */
struct nop_cmd_struct
{
  unsigned short cmd_status;	/* status of this command */
  unsigned short cmd_cmd;       /* the command itself (+bits) */
  unsigned short cmd_link;      /* offsetpointer to next command */
};

/*
 * IA Setup command
 */
struct iasetup_cmd_struct
{
  unsigned short cmd_status;
  unsigned short cmd_cmd;
  unsigned short cmd_link;
  unsigned char  iaddr[6];
};

/*
 * Configure command
 */
struct configure_cmd_struct
{
  unsigned short cmd_status;
  unsigned short cmd_cmd;
  unsigned short cmd_link;
  unsigned char  byte_cnt;   /* size of the config-cmd */
  unsigned char  fifo;       /* fifo/recv monitor */
  unsigned char  sav_bf;     /* save bad frames (bit7=1)*/
  unsigned char  adr_len;    /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/
  unsigned char  priority;   /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */
  unsigned char  ifs;        /* inter frame spacing */
  unsigned char  time_low;   /* slot time low */
  unsigned char  time_high;  /* slot time high(0-2) and max. retries(4-7) */
  unsigned char  promisc;    /* promisc-mode(0) , et al (1-7) */
  unsigned char  carr_coll;  /* carrier(0-3)/collision(4-7) stuff */
  unsigned char  fram_len;   /* minimal frame len */
  unsigned char  dummy;	     /* dummy */
};

/*
 * Multicast Setup command
 */
struct mcsetup_cmd_struct
{
  unsigned short cmd_status;
  unsigned short cmd_cmd;
  unsigned short cmd_link;
  unsigned short mc_cnt;		/* number of bytes in the MC-List */
  unsigned char  mc_list[0][6];  	/* pointer to 6 bytes entries */
};

/*
 * DUMP command
 */
struct dump_cmd_struct
{
  unsigned short cmd_status;
  unsigned short cmd_cmd;
  unsigned short cmd_link;
  unsigned short dump_offset;    /* pointeroffset to DUMP space */
};

/*
 * transmit command
 */
struct transmit_cmd_struct
{
  unsigned short cmd_status;
  unsigned short cmd_cmd;
  unsigned short cmd_link;
  unsigned short tbd_offset;	/* pointeroffset to TBD */
  unsigned char  dest[6];       /* destination address of the frame */
  unsigned short length;	/* user defined: 802.3 length / Ether type */
};

#define TCMD_ERRMASK     0x0fa0
#define TCMD_MAXCOLLMASK 0x000f
#define TCMD_MAXCOLL     0x0020
#define TCMD_HEARTBEAT   0x0040
#define TCMD_DEFERRED    0x0080
#define TCMD_UNDERRUN    0x0100
#define TCMD_LOSTCTS     0x0200
#define TCMD_NOCARRIER   0x0400
#define TCMD_LATECOLL    0x0800

struct tdr_cmd_struct
{
  unsigned short cmd_status;
  unsigned short cmd_cmd;
  unsigned short cmd_link;
  unsigned short status;
};

#define TDR_LNK_OK	0x8000	/* No link problem identified */
#define TDR_XCVR_PRB	0x4000	/* indicates a transceiver problem */
#define TDR_ET_OPN	0x2000	/* open, no correct termination */
#define TDR_ET_SRT	0x1000	/* TDR detected a short circuit */
#define TDR_TIMEMASK	0x07ff	/* mask for the time field */

/*
 * Transmit Buffer Descriptor (TBD)
 */
struct tbd_struct
{
  unsigned short size;		/* size + EOF-Flag(15) */
  unsigned short next;          /* pointeroffset to next TBD */
  char          *buffer;        /* pointer to buffer */
};

#define TBD_LAST 0x8000         /* EOF-Flag, indicates last buffer in list */
Commit	Line	Data
1da177e4 LT	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	/*
6aa20a22	15	* Cloned from ni52.h, copyright as above.
1da177e4 LT	16	*
	17	* Modified for Sun3 OBIO i82586 by Sam Creasey (sammy@sammy.net)
	18	*/
	19
	20
6aa20a22	21	/* defines for the obio chip (not vme) */
1da177e4 LT	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	*/
6aa20a22	162	struct rbd_struct
1da177e4 LT	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	*/
6aa20a22	214	struct iasetup_cmd_struct
1da177e4 LT	215	{
	216	unsigned short cmd_status;
	217	unsigned short cmd_cmd;
	218	unsigned short cmd_link;
	219	unsigned char iaddr[6];
	220	};
	221
	222	/*
6aa20a22	223	* Configure command
1da177e4 LT	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	/*
6aa20a22	245	* Multicast Setup command
1da177e4	246	*/
6aa20a22	247	struct mcsetup_cmd_struct
1da177e4 LT	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	/*
6aa20a22	268	* transmit command
1da177e4	269	*/
6aa20a22	270	struct transmit_cmd_struct
1da177e4 LT	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