2
* mace.h - definitions for the registers in the Am79C940 MACE
3
* (Medium Access Control for Ethernet) controller.
5
* Copyright (C) 1996 Paul Mackerras.
7
* This program is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU General Public License
9
* as published by the Free Software Foundation; either version
10
* 2 of the License, or (at your option) any later version.
13
#define REG(x) volatile unsigned char x; char x ## _pad[15]
16
REG(rcvfifo); /* receive FIFO */
17
REG(xmtfifo); /* transmit FIFO */
18
REG(xmtfc); /* transmit frame control */
19
REG(xmtfs); /* transmit frame status */
20
REG(xmtrc); /* transmit retry count */
21
REG(rcvfc); /* receive frame control */
22
REG(rcvfs); /* receive frame status (4 bytes) */
23
REG(fifofc); /* FIFO frame count */
24
REG(ir); /* interrupt register */
25
REG(imr); /* interrupt mask register */
26
REG(pr); /* poll register */
27
REG(biucc); /* bus interface unit config control */
28
REG(fifocc); /* FIFO configuration control */
29
REG(maccc); /* medium access control config control */
30
REG(plscc); /* phys layer signalling config control */
31
REG(phycc); /* physical configuration control */
32
REG(chipid_lo); /* chip ID, lsb */
33
REG(chipid_hi); /* chip ID, msb */
34
REG(iac); /* internal address config */
36
REG(ladrf); /* logical address filter (8 bytes) */
37
REG(padr); /* physical address (6 bytes) */
40
REG(mpc); /* missed packet count (clears when read) */
42
REG(rntpc); /* runt packet count (clears when read) */
43
REG(rcvcc); /* recv collision count (clears when read) */
45
REG(utr); /* user test reg */
51
#define DRTRY 0x80 /* don't retry transmission after collision */
52
#define DXMTFCS 0x08 /* don't append FCS to transmitted frame */
53
#define AUTO_PAD_XMIT 0x01 /* auto-pad short packets on transmission */
55
/* Bits in XMTFS: only valid when XMTSV is set in PR and XMTFS */
56
#define XMTSV 0x80 /* transmit status (i.e. XMTFS) valid */
57
#define UFLO 0x40 /* underflow - xmit fifo ran dry */
58
#define LCOL 0x20 /* late collision (transmission aborted) */
59
#define MORE 0x10 /* 2 or more retries needed to xmit frame */
60
#define ONE 0x08 /* 1 retry needed to xmit frame */
61
#define DEFER 0x04 /* MACE had to defer xmission (enet busy) */
62
#define LCAR 0x02 /* loss of carrier (transmission aborted) */
63
#define RTRY 0x01 /* too many retries (transmission aborted) */
65
/* Bits in XMTRC: only valid when XMTSV is set in PR (and XMTFS) */
66
#define EXDEF 0x80 /* had to defer for excessive time */
67
#define RETRY_MASK 0x0f /* number of retries (0 - 15) */
70
#define LLRCV 0x08 /* low latency receive: early DMA request */
71
#define M_RBAR 0x04 /* sets function of EAM/R pin */
72
#define AUTO_STRIP_RCV 0x01 /* auto-strip short LLC frames on recv */
75
* Bits in RCVFS. After a frame is received, four bytes of status
76
* are automatically read from this register and appended to the frame
77
* data in memory. These are:
78
* Byte 0 and 1: message byte count and frame status
79
* Byte 2: runt packet count
80
* Byte 3: receive collision count
82
#define RS_OFLO 0x8000 /* receive FIFO overflowed */
83
#define RS_CLSN 0x4000 /* received frame suffered (late) collision */
84
#define RS_FRAMERR 0x2000 /* framing error flag */
85
#define RS_FCSERR 0x1000 /* frame had FCS error */
86
#define RS_COUNT 0x0fff /* mask for byte count field */
88
/* Bits (fields) in FIFOFC */
89
#define RCVFC_SH 4 /* receive frame count in FIFO */
90
#define RCVFC_MASK 0x0f
91
#define XMTFC_SH 0 /* transmit frame count in FIFO */
92
#define XMTFC_MASK 0x0f
95
* Bits in IR and IMR. The IR clears itself when read.
96
* Setting a bit in the IMR will disable the corresponding interrupt.
98
#define JABBER 0x80 /* jabber error - 10baseT xmission too long */
99
#define BABBLE 0x40 /* babble - xmitter xmitting for too long */
100
#define CERR 0x20 /* collision err - no SQE test (heartbeat) */
101
#define RCVCCO 0x10 /* RCVCC overflow */
102
#define RNTPCO 0x08 /* RNTPC overflow */
103
#define MPCO 0x04 /* MPC overflow */
104
#define RCVINT 0x02 /* receive interrupt */
105
#define XMTINT 0x01 /* transmitter interrupt */
108
#define XMTSV 0x80 /* XMTFS valid (same as in XMTFS) */
109
#define TDTREQ 0x40 /* set when xmit fifo is requesting data */
110
#define RDTREQ 0x20 /* set when recv fifo requests data xfer */
113
#define BSWP 0x40 /* byte swap, i.e. big-endian bus */
114
#define XMTSP_4 0x00 /* start xmitting when 4 bytes in FIFO */
115
#define XMTSP_16 0x10 /* start xmitting when 16 bytes in FIFO */
116
#define XMTSP_64 0x20 /* start xmitting when 64 bytes in FIFO */
117
#define XMTSP_112 0x30 /* start xmitting when 112 bytes in FIFO */
118
#define SWRST 0x01 /* software reset */
121
#define XMTFW_8 0x00 /* xmit fifo watermark = 8 words free */
122
#define XMTFW_16 0x40 /* 16 words free */
123
#define XMTFW_32 0x80 /* 32 words free */
124
#define RCVFW_16 0x00 /* recv fifo watermark = 16 bytes avail */
125
#define RCVFW_32 0x10 /* 32 bytes avail */
126
#define RCVFW_64 0x20 /* 64 bytes avail */
127
#define XMTFWU 0x08 /* xmit fifo watermark update enable */
128
#define RCVFWU 0x04 /* recv fifo watermark update enable */
129
#define XMTBRST 0x02 /* enable transmit burst mode */
130
#define RCVBRST 0x01 /* enable receive burst mode */
133
#define PROM 0x80 /* promiscuous mode */
134
#define DXMT2PD 0x40 /* disable xmit two-part deferral algorithm */
135
#define EMBA 0x20 /* enable modified backoff algorithm */
136
#define DRCVPA 0x08 /* disable receiving physical address */
137
#define DRCVBC 0x04 /* disable receiving broadcasts */
138
#define ENXMT 0x02 /* enable transmitter */
139
#define ENRCV 0x01 /* enable receiver */
142
#define XMTSEL 0x08 /* select DO+/DO- state when idle */
143
#define PORTSEL_AUI 0x00 /* select AUI port */
144
#define PORTSEL_10T 0x02 /* select 10Base-T port */
145
#define PORTSEL_DAI 0x04 /* select DAI port */
146
#define PORTSEL_GPSI 0x06 /* select GPSI port */
147
#define ENPLSIO 0x01 /* enable optional PLS I/O pins */
150
#define LNKFL 0x80 /* reports 10Base-T link failure */
151
#define DLNKTST 0x40 /* disable 10Base-T link test */
152
#define REVPOL 0x20 /* 10Base-T receiver polarity reversed */
153
#define DAPC 0x10 /* disable auto receiver polarity correction */
154
#define LRT 0x08 /* low receive threshold for long links */
155
#define ASEL 0x04 /* auto-select AUI or 10Base-T port */
156
#define RWAKE 0x02 /* remote wake function */
157
#define AWAKE 0x01 /* auto wake function */
160
#define ADDRCHG 0x80 /* request address change */
161
#define PHYADDR 0x04 /* access physical address */
162
#define LOGADDR 0x02 /* access multicast filter */
165
#define RTRE 0x80 /* reserved test register enable. DON'T SET. */
166
#define RTRD 0x40 /* reserved test register disable. Sticky */
167
#define RPAC 0x20 /* accept runt packets */
168
#define FCOLL 0x10 /* force collision */
169
#define RCVFCSE 0x08 /* receive FCS enable */
170
#define LOOP_NONE 0x00 /* no loopback */
171
#define LOOP_EXT 0x02 /* external loopback */
172
#define LOOP_INT 0x04 /* internal loopback, excludes MENDEC */
173
#define LOOP_MENDEC 0x06 /* internal loopback, includes MENDEC */