1 /*------------------------------------------------------------------------
2 . smc9194.h
3 . Copyright (C) 1996 by Erik Stahlman
4 .
5 . This software may be used and distributed according to the terms
6 . of the GNU Public License, incorporated herein by reference.
7 .
8 . This file contains register information and access macros for
9 . the SMC91xxx chipset.
10 .
11 . Information contained in this file was obtained from the SMC91C94
12 . manual from SMC. To get a copy, if you really want one, you can find
13 . information under www.smc.com in the components division.
14 . ( this thanks to advice from Donald Becker ).
15 .
16 . Authors
17 . Erik Stahlman ( erik@vt.edu )
18 .
19 . History
20 . 01/06/96 Erik Stahlman moved definitions here from main .c file
21 . 01/19/96 Erik Stahlman polished this up some, and added better
22 . error handling
23 .
24 ---------------------------------------------------------------------------*/
25 #ifndef _SMC9194_H_
26 #define _SMC9194_H_
27
28 /* I want some simple types */
29
30 typedef unsigned char byte;
31 typedef unsigned short word;
32 typedef unsigned long int dword;
33
34
35 /* Because of bank switching, the SMC91xxx uses only 16 I/O ports */
36
37 #define SMC_IO_EXTENT 16
38
39
40 /*---------------------------------------------------------------
41 .
42 . A description of the SMC registers is probably in order here,
43 . although for details, the SMC datasheet is invaluable.
44 .
45 . Basically, the chip has 4 banks of registers ( 0 to 3 ), which
46 . are accessed by writing a number into the BANK_SELECT register
47 . ( I also use a SMC_SELECT_BANK macro for this ).
48 .
49 . The banks are configured so that for most purposes, bank 2 is all
50 . that is needed for simple run time tasks.
51 -----------------------------------------------------------------------*/
52
53 /*
54 . Bank Select Register:
55 .
56 . yyyy yyyy 0000 00xx
57 . xx = bank number
58 . yyyy yyyy = 0x33, for identification purposes.
59 */
60 #define BANK_SELECT 14
61
62 /* BANK 0 */
63
64 #define TCR 0 /* transmit control register */
65 #define TCR_ENABLE 0x0001 /* if this is 1, we can transmit */
66 #define TCR_FDUPLX 0x0800 /* receive packets sent out */
67 #define TCR_STP_SQET 0x1000 /* stop transmitting if Signal quality error */
68 #define TCR_MON_CNS 0x0400 /* monitors the carrier status */
69 #define TCR_PAD_ENABLE 0x0080 /* pads short packets to 64 bytes */
70
71 #define TCR_CLEAR 0 /* do NOTHING */
72 /* the normal settings for the TCR register : */
73 /* QUESTION: do I want to enable padding of short packets ? */
74 #define TCR_NORMAL TCR_ENABLE
75
76
77 #define EPH_STATUS 2
78 #define ES_LINK_OK 0x4000 /* is the link integrity ok ? */
79
80 #define RCR 4
81 #define RCR_SOFTRESET 0x8000 /* resets the chip */
82 #define RCR_STRIP_CRC 0x200 /* strips CRC */
83 #define RCR_ENABLE 0x100 /* IFF this is set, we can receive packets */
84 #define RCR_ALMUL 0x4 /* receive all multicast packets */
85 #define RCR_PROMISC 0x2 /* enable promiscuous mode */
86
87 /* the normal settings for the RCR register : */
88 #define RCR_NORMAL (RCR_STRIP_CRC | RCR_ENABLE)
89 #define RCR_CLEAR 0x0 /* set it to a base state */
90
91 #define COUNTER 6
92 #define MIR 8
93 #define MCR 10
94 /* 12 is reserved */
95
96 /* BANK 1 */
97 #define CONFIG 0
98 #define CFG_AUI_SELECT 0x100
99 #define BASE 2
100 #define ADDR0 4
101 #define ADDR1 6
102 #define ADDR2 8
103 #define GENERAL 10
104 #define CONTROL 12
105 #define CTL_POWERDOWN 0x2000
106 #define CTL_LE_ENABLE 0x80
107 #define CTL_CR_ENABLE 0x40
108 #define CTL_TE_ENABLE 0x0020
109 #define CTL_AUTO_RELEASE 0x0800
110 #define CTL_EPROM_ACCESS 0x0003 /* high if Eprom is being read */
111
112 /* BANK 2 */
113 #define MMU_CMD 0
114 #define MC_BUSY 1 /* only readable bit in the register */
115 #define MC_NOP 0
116 #define MC_ALLOC 0x20 /* or with number of 256 byte packets */
117 #define MC_RESET 0x40
118 #define MC_REMOVE 0x60 /* remove the current rx packet */
119 #define MC_RELEASE 0x80 /* remove and release the current rx packet */
120 #define MC_FREEPKT 0xA0 /* Release packet in PNR register */
121 #define MC_ENQUEUE 0xC0 /* Enqueue the packet for transmit */
122
123 #define PNR_ARR 2
124 #define FIFO_PORTS 4
125
126 #define FP_RXEMPTY 0x8000
127 #define FP_TXEMPTY 0x80
128
129 #define POINTER 6
130 #define PTR_READ 0x2000
131 #define PTR_RCV 0x8000
132 #define PTR_AUTOINC 0x4000
133 #define PTR_AUTO_INC 0x0040
134
135 #define DATA_1 8
136 #define DATA_2 10
137 #define INTERRUPT 12
138
139 #define INT_MASK 13
140 #define IM_RCV_INT 0x1
141 #define IM_TX_INT 0x2
142 #define IM_TX_EMPTY_INT 0x4
143 #define IM_ALLOC_INT 0x8
144 #define IM_RX_OVRN_INT 0x10
145 #define IM_EPH_INT 0x20
146 #define IM_ERCV_INT 0x40 /* not on SMC9192 */
147
148 /* BANK 3 */
149 #define MULTICAST1 0
150 #define MULTICAST2 2
151 #define MULTICAST3 4
152 #define MULTICAST4 6
153 #define MGMT 8
154 #define REVISION 10 /* ( hi: chip id low: rev # ) */
155
156
157 /* this is NOT on SMC9192 */
158 #define ERCV 12
159
160 #define CHIP_9190 3
161 #define CHIP_9194 4
162 #define CHIP_9195 5
163 #define CHIP_91100 7
164
165 static const char * chip_ids[ 15 ] = {
166 NULL, NULL, NULL,
167 /* 3 */ "SMC91C90/91C92",
168 /* 4 */ "SMC91C94",
169 /* 5 */ "SMC91C95",
170 NULL,
171 /* 7 */ "SMC91C100",
172 NULL, NULL, NULL, NULL,
173 NULL, NULL, NULL};
174
175 /*
176 . Transmit status bits
177 */
178 #define TS_SUCCESS 0x0001
179 #define TS_LOSTCAR 0x0400
180 #define TS_LATCOL 0x0200
181 #define TS_16COL 0x0010
182
183 /*
184 . Receive status bits
185 */
186 #define RS_ALGNERR 0x8000
187 #define RS_BADCRC 0x2000
188 #define RS_ODDFRAME 0x1000
189 #define RS_TOOLONG 0x0800
190 #define RS_TOOSHORT 0x0400
191 #define RS_MULTICAST 0x0001
192 #define RS_ERRORS (RS_ALGNERR | RS_BADCRC | RS_TOOLONG | RS_TOOSHORT)
193
194 static const char * interfaces[ 2 ] = { "TP", "AUI" };
195
196 /*-------------------------------------------------------------------------
197 . I define some macros to make it easier to do somewhat common
198 . or slightly complicated, repeated tasks.
199 --------------------------------------------------------------------------*/
200
201 /* select a register bank, 0 to 3 */
202
203 #define SMC_SELECT_BANK(x) { outw( x, ioaddr + BANK_SELECT ); }
204
205 /* define a small delay for the reset */
206 #define SMC_DELAY() { inw( ioaddr + RCR );\
207 inw( ioaddr + RCR );\
208 inw( ioaddr + RCR ); }
209
210 /* this enables an interrupt in the interrupt mask register */
211 #define SMC_ENABLE_INT(x) {\
212 unsigned char mask;\
213 SMC_SELECT_BANK(2);\
214 mask = inb( ioaddr + INT_MASK );\
215 mask |= (x);\
216 outb( mask, ioaddr + INT_MASK ); \
217 }
218
219 /* this disables an interrupt from the interrupt mask register */
220
221 #define SMC_DISABLE_INT(x) {\
222 unsigned char mask;\
223 SMC_SELECT_BANK(2);\
224 mask = inb( ioaddr + INT_MASK );\
225 mask &= ~(x);\
226 outb( mask, ioaddr + INT_MASK ); \
227 }
228
229 /*----------------------------------------------------------------------
230 . Define the interrupts that I want to receive from the card
231 .
232 . I want:
233 . IM_EPH_INT, for nasty errors
234 . IM_RCV_INT, for happy received packets
235 . IM_RX_OVRN_INT, because I have to kick the receiver
236 --------------------------------------------------------------------------*/
237 #define SMC_INTERRUPT_MASK (IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT)
238
239 #endif /* _SMC_9194_H_ */
240
241
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