- /*
- * 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 */