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1.1 root 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 ([email protected])
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: #define NI52_RESET 0 /* writing to this address, resets the i82586 */
16: #define NI52_ATTENTION 1 /* channel attention, kick the 586 */
17: #define NI52_TENA 3 /* 2-5 possibly wrong, Xmit enable */
18: #define NI52_TDIS 2 /* Xmit disable */
19: #define NI52_INTENA 5 /* Interrupt enable */
20: #define NI52_INTDIS 4 /* Interrupt disable */
21: #define NI52_MAGIC1 6 /* dunno exact function */
22: #define NI52_MAGIC2 7 /* dunno exact function */
23:
24: #define NI52_MAGICVAL1 0x00 /* magic-values for ni5210 card */
25: #define NI52_MAGICVAL2 0x55
26:
27: /*
28: * where to find the System Configuration Pointer (SCP)
29: */
30: #define SCP_DEFAULT_ADDRESS 0xfffff4
31:
32:
33: /*
34: * System Configuration Pointer Struct
35: */
36:
37: struct scp_struct
38: {
39: unsigned short zero_dum0; /* has to be zero */
40: unsigned char sysbus; /* 0=16Bit,1=8Bit */
41: unsigned char zero_dum1; /* has to be zero for 586 */
42: unsigned short zero_dum2;
43: unsigned short zero_dum3;
44: char *iscp; /* pointer to the iscp-block */
45: };
46:
47:
48: /*
49: * Intermediate System Configuration Pointer (ISCP)
50: */
51: struct iscp_struct
52: {
53: unsigned char busy; /* 586 clears after successful init */
54: unsigned char zero_dummy; /* hast to be zero */
55: unsigned short scb_offset; /* pointeroffset to the scb_base */
56: char *scb_base; /* base-address of all 16-bit offsets */
57: };
58:
59: /*
60: * System Control Block (SCB)
61: */
62: struct scb_struct
63: {
64: unsigned short status; /* status word */
65: unsigned short cmd; /* command word */
66: unsigned short cbl_offset; /* pointeroffset, command block list */
67: unsigned short rfa_offset; /* pointeroffset, receive frame area */
68: unsigned short crc_errs; /* CRC-Error counter */
69: unsigned short aln_errs; /* allignmenterror counter */
70: unsigned short rsc_errs; /* Resourceerror counter */
71: unsigned short ovrn_errs; /* OVerrunerror counter */
72: };
73:
74: /*
75: * possible command values for the command word
76: */
77: #define RUC_MASK 0x0070 /* mask for RU commands */
78: #define RUC_NOP 0x0000 /* NOP-command */
79: #define RUC_START 0x0010 /* start RU */
80: #define RUC_RESUME 0x0020 /* resume RU after suspend */
81: #define RUC_SUSPEND 0x0030 /* suspend RU */
82: #define RUC_ABORT 0x0040 /* abort receiver operation immediately */
83:
84: #define CUC_MASK 0x0700 /* mask for CU command */
85: #define CUC_NOP 0x0000 /* NOP-command */
86: #define CUC_START 0x0100 /* start execution of 1. cmd on the CBL */
87: #define CUC_RESUME 0x0200 /* resume after suspend */
88: #define CUC_SUSPEND 0x0300 /* Suspend CU */
89: #define CUC_ABORT 0x0400 /* abort command operation immediately */
90:
91: #define ACK_MASK 0xf000 /* mask for ACK command */
92: #define ACK_CX 0x8000 /* acknowledges STAT_CX */
93: #define ACK_FR 0x4000 /* ack. STAT_FR */
94: #define ACK_CNA 0x2000 /* ack. STAT_CNA */
95: #define ACK_RNR 0x1000 /* ack. STAT_RNR */
96:
97: /*
98: * possible status values for the status word
99: */
100: #define STAT_MASK 0xf000 /* mask for cause of interrupt */
101: #define STAT_CX 0x8000 /* CU finished cmd with its I bit set */
102: #define STAT_FR 0x4000 /* RU finished receiving a frame */
103: #define STAT_CNA 0x2000 /* CU left active state */
104: #define STAT_RNR 0x1000 /* RU left ready state */
105:
106: #define CU_STATUS 0x700 /* CU status, 0=idle */
107: #define CU_SUSPEND 0x100 /* CU is suspended */
108: #define CU_ACTIVE 0x200 /* CU is active */
109:
110: #define RU_STATUS 0x70 /* RU status, 0=idle */
111: #define RU_SUSPEND 0x10 /* RU suspended */
112: #define RU_NOSPACE 0x20 /* RU no resources */
113: #define RU_READY 0x40 /* RU is ready */
114:
115: /*
116: * Receive Frame Descriptor (RFD)
117: */
118: struct rfd_struct
119: {
120: unsigned short status; /* status word */
121: unsigned short last; /* Bit15,Last Frame on List / Bit14,suspend */
122: unsigned short next; /* linkoffset to next RFD */
123: unsigned short rbd_offset; /* pointeroffset to RBD-buffer */
124: unsigned char dest[6]; /* ethernet-address, destination */
125: unsigned char source[6]; /* ethernet-address, source */
126: unsigned short length; /* 802.3 frame-length */
127: unsigned short zero_dummy; /* dummy */
128: };
129:
130: #define RFD_LAST 0x8000 /* last: last rfd in the list */
131: #define RFD_SUSP 0x4000 /* last: suspend RU after */
132: #define RFD_ERRMASK 0x0fe1 /* status: errormask */
133: #define RFD_MATCHADD 0x0002 /* status: Destinationaddress !matches IA */
134: #define RFD_RNR 0x0200 /* status: receiver out of resources */
135:
136: /*
137: * Receive Buffer Descriptor (RBD)
138: */
139: struct rbd_struct
140: {
141: unsigned short status; /* status word,number of used bytes in buff */
142: unsigned short next; /* pointeroffset to next RBD */
143: char *buffer; /* receive buffer address pointer */
144: unsigned short size; /* size of this buffer */
145: unsigned short zero_dummy; /* dummy */
146: };
147:
148: #define RBD_LAST 0x8000 /* last buffer */
149: #define RBD_USED 0x4000 /* this buffer has data */
150: #define RBD_MASK 0x3fff /* size-mask for length */
151:
152: /*
153: * Statusvalues for Commands/RFD
154: */
155: #define STAT_COMPL 0x8000 /* status: frame/command is complete */
156: #define STAT_BUSY 0x4000 /* status: frame/command is busy */
157: #define STAT_OK 0x2000 /* status: frame/command is ok */
158:
159: /*
160: * Action-Commands
161: */
162: #define CMD_NOP 0x0000 /* NOP */
163: #define CMD_IASETUP 0x0001 /* initial address setup command */
164: #define CMD_CONFIGURE 0x0002 /* configure command */
165: #define CMD_MCSETUP 0x0003 /* MC setup command */
166: #define CMD_XMIT 0x0004 /* transmit command */
167: #define CMD_TDR 0x0005 /* time domain reflectometer (TDR) command */
168: #define CMD_DUMP 0x0006 /* dump command */
169: #define CMD_DIAGNOSE 0x0007 /* diagnose command */
170:
171: /*
172: * Action command bits
173: */
174: #define CMD_LAST 0x8000 /* indicates last command in the CBL */
175: #define CMD_SUSPEND 0x4000 /* suspend CU after this CB */
176: #define CMD_INT 0x2000 /* generate interrupt after execution */
177:
178: /*
179: * NOP - command
180: */
181: struct nop_cmd_struct
182: {
183: unsigned short cmd_status; /* status of this command */
184: unsigned short cmd_cmd; /* the command itself (+bits) */
185: unsigned short cmd_link; /* offsetpointer to next command */
186: };
187:
188: /*
189: * IA Setup command
190: */
191: struct iasetup_cmd_struct
192: {
193: unsigned short cmd_status;
194: unsigned short cmd_cmd;
195: unsigned short cmd_link;
196: unsigned char iaddr[6];
197: };
198:
199: /*
200: * Configure command
201: */
202: struct configure_cmd_struct
203: {
204: unsigned short cmd_status;
205: unsigned short cmd_cmd;
206: unsigned short cmd_link;
207: unsigned char byte_cnt; /* size of the config-cmd */
208: unsigned char fifo; /* fifo/recv monitor */
209: unsigned char sav_bf; /* save bad frames (bit7=1)*/
210: unsigned char adr_len; /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/
211: unsigned char priority; /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */
212: unsigned char ifs; /* inter frame spacing */
213: unsigned char time_low; /* slot time low */
214: unsigned char time_high; /* slot time high(0-2) and max. retries(4-7) */
215: unsigned char promisc; /* promisc-mode(0) , et al (1-7) */
216: unsigned char carr_coll; /* carrier(0-3)/collision(4-7) stuff */
217: unsigned char fram_len; /* minimal frame len */
218: unsigned char dummy; /* dummy */
219: };
220:
221: /*
222: * Multicast Setup command
223: */
224: struct mcsetup_cmd_struct
225: {
226: unsigned short cmd_status;
227: unsigned short cmd_cmd;
228: unsigned short cmd_link;
229: unsigned short mc_cnt; /* number of bytes in the MC-List */
230: unsigned char mc_list[0][6]; /* pointer to 6 bytes entries */
231: };
232:
233: /*
234: * transmit command
235: */
236: struct transmit_cmd_struct
237: {
238: unsigned short cmd_status;
239: unsigned short cmd_cmd;
240: unsigned short cmd_link;
241: unsigned short tbd_offset; /* pointeroffset to TBD */
242: unsigned char dest[6]; /* destination address of the frame */
243: unsigned short length; /* user defined: 802.3 length / Ether type */
244: };
245:
246: #define TCMD_ERRMASK 0x0fa0
247: #define TCMD_MAXCOLLMASK 0x000f
248: #define TCMD_MAXCOLL 0x0020
249: #define TCMD_HEARTBEAT 0x0040
250: #define TCMD_DEFERRED 0x0080
251: #define TCMD_UNDERRUN 0x0100
252: #define TCMD_LOSTCTS 0x0200
253: #define TCMD_NOCARRIER 0x0400
254: #define TCMD_LATECOLL 0x0800
255:
256: struct tdr_cmd_struct
257: {
258: unsigned short cmd_status;
259: unsigned short cmd_cmd;
260: unsigned short cmd_link;
261: unsigned short status;
262: };
263:
264: #define TDR_LNK_OK 0x8000 /* No link problem identified */
265: #define TDR_XCVR_PRB 0x4000 /* indicates a transceiver problem */
266: #define TDR_ET_OPN 0x2000 /* open, no correct termination */
267: #define TDR_ET_SRT 0x1000 /* TDR detected a short circuit */
268: #define TDR_TIMEMASK 0x07ff /* mask for the time field */
269:
270: /*
271: * Transmit Buffer Descriptor (TBD)
272: */
273: struct tbd_struct
274: {
275: unsigned short size; /* size + EOF-Flag(15) */
276: unsigned short next; /* pointeroffset to next TBD */
277: char *buffer; /* pointer to buffer */
278: };
279:
280: #define TBD_LAST 0x8000 /* EOF-Flag, indicates last buffer in list */
281:
282:
283:
284:
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