| /* |
| * mace.h - definitions for the registers in the Am79C940 MACE |
| * (Medium Access Control for Ethernet) controller. |
| * |
| * Copyright (C) 1996 Paul Mackerras. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #define REG(x) volatile unsigned char x; char x ## _pad[15] |
| |
| struct mace { |
| REG(rcvfifo); /* receive FIFO */ |
| REG(xmtfifo); /* transmit FIFO */ |
| REG(xmtfc); /* transmit frame control */ |
| REG(xmtfs); /* transmit frame status */ |
| REG(xmtrc); /* transmit retry count */ |
| REG(rcvfc); /* receive frame control */ |
| REG(rcvfs); /* receive frame status (4 bytes) */ |
| REG(fifofc); /* FIFO frame count */ |
| REG(ir); /* interrupt register */ |
| REG(imr); /* interrupt mask register */ |
| REG(pr); /* poll register */ |
| REG(biucc); /* bus interface unit config control */ |
| REG(fifocc); /* FIFO configuration control */ |
| REG(maccc); /* medium access control config control */ |
| REG(plscc); /* phys layer signalling config control */ |
| REG(phycc); /* physical configuration control */ |
| REG(chipid_lo); /* chip ID, lsb */ |
| REG(chipid_hi); /* chip ID, msb */ |
| REG(iac); /* internal address config */ |
| REG(reg19); |
| REG(ladrf); /* logical address filter (8 bytes) */ |
| REG(padr); /* physical address (6 bytes) */ |
| REG(reg22); |
| REG(reg23); |
| REG(mpc); /* missed packet count (clears when read) */ |
| REG(reg25); |
| REG(rntpc); /* runt packet count (clears when read) */ |
| REG(rcvcc); /* recv collision count (clears when read) */ |
| REG(reg28); |
| REG(utr); /* user test reg */ |
| REG(reg30); |
| REG(reg31); |
| }; |
| |
| /* Bits in XMTFC */ |
| #define DRTRY 0x80 /* don't retry transmission after collision */ |
| #define DXMTFCS 0x08 /* don't append FCS to transmitted frame */ |
| #define AUTO_PAD_XMIT 0x01 /* auto-pad short packets on transmission */ |
| |
| /* Bits in XMTFS: only valid when XMTSV is set in PR and XMTFS */ |
| #define XMTSV 0x80 /* transmit status (i.e. XMTFS) valid */ |
| #define UFLO 0x40 /* underflow - xmit fifo ran dry */ |
| #define LCOL 0x20 /* late collision (transmission aborted) */ |
| #define MORE 0x10 /* 2 or more retries needed to xmit frame */ |
| #define ONE 0x08 /* 1 retry needed to xmit frame */ |
| #define DEFER 0x04 /* MACE had to defer xmission (enet busy) */ |
| #define LCAR 0x02 /* loss of carrier (transmission aborted) */ |
| #define RTRY 0x01 /* too many retries (transmission aborted) */ |
| |
| /* Bits in XMTRC: only valid when XMTSV is set in PR (and XMTFS) */ |
| #define EXDEF 0x80 /* had to defer for excessive time */ |
| #define RETRY_MASK 0x0f /* number of retries (0 - 15) */ |
| |
| /* Bits in RCVFC */ |
| #define LLRCV 0x08 /* low latency receive: early DMA request */ |
| #define M_RBAR 0x04 /* sets function of EAM/R pin */ |
| #define AUTO_STRIP_RCV 0x01 /* auto-strip short LLC frames on recv */ |
| |
| /* |
| * Bits in RCVFS. After a frame is received, four bytes of status |
| * are automatically read from this register and appended to the frame |
| * data in memory. These are: |
| * Byte 0 and 1: message byte count and frame status |
| * Byte 2: runt packet count |
| * Byte 3: receive collision count |
| */ |
| #define RS_OFLO 0x8000 /* receive FIFO overflowed */ |
| #define RS_CLSN 0x4000 /* received frame suffered (late) collision */ |
| #define RS_FRAMERR 0x2000 /* framing error flag */ |
| #define RS_FCSERR 0x1000 /* frame had FCS error */ |
| #define RS_COUNT 0x0fff /* mask for byte count field */ |
| |
| /* Bits (fields) in FIFOFC */ |
| #define RCVFC_SH 4 /* receive frame count in FIFO */ |
| #define RCVFC_MASK 0x0f |
| #define XMTFC_SH 0 /* transmit frame count in FIFO */ |
| #define XMTFC_MASK 0x0f |
| |
| /* |
| * Bits in IR and IMR. The IR clears itself when read. |
| * Setting a bit in the IMR will disable the corresponding interrupt. |
| */ |
| #define JABBER 0x80 /* jabber error - 10baseT xmission too long */ |
| #define BABBLE 0x40 /* babble - xmitter xmitting for too long */ |
| #define CERR 0x20 /* collision err - no SQE test (heartbeat) */ |
| #define RCVCCO 0x10 /* RCVCC overflow */ |
| #define RNTPCO 0x08 /* RNTPC overflow */ |
| #define MPCO 0x04 /* MPC overflow */ |
| #define RCVINT 0x02 /* receive interrupt */ |
| #define XMTINT 0x01 /* transmitter interrupt */ |
| |
| /* Bits in PR */ |
| #define XMTSV 0x80 /* XMTFS valid (same as in XMTFS) */ |
| #define TDTREQ 0x40 /* set when xmit fifo is requesting data */ |
| #define RDTREQ 0x20 /* set when recv fifo requests data xfer */ |
| |
| /* Bits in BIUCC */ |
| #define BSWP 0x40 /* byte swap, i.e. big-endian bus */ |
| #define XMTSP_4 0x00 /* start xmitting when 4 bytes in FIFO */ |
| #define XMTSP_16 0x10 /* start xmitting when 16 bytes in FIFO */ |
| #define XMTSP_64 0x20 /* start xmitting when 64 bytes in FIFO */ |
| #define XMTSP_112 0x30 /* start xmitting when 112 bytes in FIFO */ |
| #define SWRST 0x01 /* software reset */ |
| |
| /* Bits in FIFOCC */ |
| #define XMTFW_8 0x00 /* xmit fifo watermark = 8 words free */ |
| #define XMTFW_16 0x40 /* 16 words free */ |
| #define XMTFW_32 0x80 /* 32 words free */ |
| #define RCVFW_16 0x00 /* recv fifo watermark = 16 bytes avail */ |
| #define RCVFW_32 0x10 /* 32 bytes avail */ |
| #define RCVFW_64 0x20 /* 64 bytes avail */ |
| #define XMTFWU 0x08 /* xmit fifo watermark update enable */ |
| #define RCVFWU 0x04 /* recv fifo watermark update enable */ |
| #define XMTBRST 0x02 /* enable transmit burst mode */ |
| #define RCVBRST 0x01 /* enable receive burst mode */ |
| |
| /* Bits in MACCC */ |
| #define PROM 0x80 /* promiscuous mode */ |
| #define DXMT2PD 0x40 /* disable xmit two-part deferral algorithm */ |
| #define EMBA 0x20 /* enable modified backoff algorithm */ |
| #define DRCVPA 0x08 /* disable receiving physical address */ |
| #define DRCVBC 0x04 /* disable receiving broadcasts */ |
| #define ENXMT 0x02 /* enable transmitter */ |
| #define ENRCV 0x01 /* enable receiver */ |
| |
| /* Bits in PLSCC */ |
| #define XMTSEL 0x08 /* select DO+/DO- state when idle */ |
| #define PORTSEL_AUI 0x00 /* select AUI port */ |
| #define PORTSEL_10T 0x02 /* select 10Base-T port */ |
| #define PORTSEL_DAI 0x04 /* select DAI port */ |
| #define PORTSEL_GPSI 0x06 /* select GPSI port */ |
| #define ENPLSIO 0x01 /* enable optional PLS I/O pins */ |
| |
| /* Bits in PHYCC */ |
| #define LNKFL 0x80 /* reports 10Base-T link failure */ |
| #define DLNKTST 0x40 /* disable 10Base-T link test */ |
| #define REVPOL 0x20 /* 10Base-T receiver polarity reversed */ |
| #define DAPC 0x10 /* disable auto receiver polarity correction */ |
| #define LRT 0x08 /* low receive threshold for long links */ |
| #define ASEL 0x04 /* auto-select AUI or 10Base-T port */ |
| #define RWAKE 0x02 /* remote wake function */ |
| #define AWAKE 0x01 /* auto wake function */ |
| |
| /* Bits in IAC */ |
| #define ADDRCHG 0x80 /* request address change */ |
| #define PHYADDR 0x04 /* access physical address */ |
| #define LOGADDR 0x02 /* access multicast filter */ |
| |
| /* Bits in UTR */ |
| #define RTRE 0x80 /* reserved test register enable. DON'T SET. */ |
| #define RTRD 0x40 /* reserved test register disable. Sticky */ |
| #define RPAC 0x20 /* accept runt packets */ |
| #define FCOLL 0x10 /* force collision */ |
| #define RCVFCSE 0x08 /* receive FCS enable */ |
| #define LOOP_NONE 0x00 /* no loopback */ |
| #define LOOP_EXT 0x02 /* external loopback */ |
| #define LOOP_INT 0x04 /* internal loopback, excludes MENDEC */ |
| #define LOOP_MENDEC 0x06 /* internal loopback, includes MENDEC */ |