ref: b502a62da2ec6058923db94f87ecc2d29db2fa77
dir: /os/boot.original/pc/etherelnk3.c/
/* * Etherlink III, Fast EtherLink and Fast EtherLink XL adapters. * To do: * check robustness in the face of errors (e.g. busmaster & rxUnderrun); * RxEarly and busmaster; * autoSelect; * PCI latency timer and master enable; * errata list; * rewrite all initialisation. * * Product ID: * 9150 ISA 3C509[B] * 9050 ISA 3C509[B]-TP * 9450 ISA 3C509[B]-COMBO * 9550 ISA 3C509[B]-TPO * * 9350 EISA 3C579 * 9250 EISA 3C579-TP * * 5920 EISA 3C592-[TP|COMBO|TPO] * 5970 EISA 3C597-TX Fast Etherlink 10BASE-T/100BASE-TX * 5971 EISA 3C597-T4 Fast Etherlink 10BASE-T/100BASE-T4 * 5972 EISA 3C597-MII Fast Etherlink 10BASE-T/MII * * 5900 PCI 3C590-[TP|COMBO|TPO] * 5950 PCI 3C595-TX Fast Etherlink Shared 10BASE-T/100BASE-TX * 5951 PCI 3C595-T4 Fast Etherlink Shared 10BASE-T/100BASE-T4 * 5952 PCI 3C595-MII Fast Etherlink 10BASE-T/MII * * 9000 PCI 3C900-TPO Etherlink III XL PCI 10BASE-T * 9001 PCI 3C900-COMBO Etherlink III XL PCI 10BASE-T/10BASE-2/AUI * 9005 PCI 3C900B-COMBO Etherlink III XL PCI 10BASE-T/10BASE-2/AUI * 9050 PCI 3C905-TX Fast Etherlink XL Shared 10BASE-T/100BASE-TX * 9051 PCI 3C905-T4 Fast Etherlink Shared 10BASE-T/100BASE-T4 * 9055 PCI 3C905B-TX Fast Etherlink Shared 10BASE-T/100BASE-TX * 9200 PCI 3C905C-TX Fast Etherlink Shared 10BASE-T/100BASE-TX * * 9058 PCMCIA 3C589[B]-[TP|COMBO] * * 627C MCA 3C529 * 627D MCA 3C529-TP */ #include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" #include "etherif.h" #define XCVRDEBUG if(0)print enum { IDport = 0x0110, /* anywhere between 0x0100 and 0x01F0 */ }; enum { /* all windows */ CommandR = 0x000E, IntStatusR = 0x000E, }; enum { /* Commands */ GlobalReset = 0x0000, SelectRegisterWindow = 0x0001, EnableDcConverter = 0x0002, RxDisable = 0x0003, RxEnable = 0x0004, RxReset = 0x0005, Stall = 0x0006, /* 3C90x */ TxDone = 0x0007, RxDiscard = 0x0008, TxEnable = 0x0009, TxDisable = 0x000A, TxReset = 0x000B, RequestInterrupt = 0x000C, AcknowledgeInterrupt = 0x000D, SetInterruptEnable = 0x000E, SetIndicationEnable = 0x000F, /* SetReadZeroMask */ SetRxFilter = 0x0010, SetRxEarlyThresh = 0x0011, SetTxAvailableThresh = 0x0012, SetTxStartThresh = 0x0013, StartDma = 0x0014, /* initiate busmaster operation */ StatisticsEnable = 0x0015, StatisticsDisable = 0x0016, DisableDcConverter = 0x0017, SetTxReclaimThresh = 0x0018, /* PIO-only adapters */ PowerUp = 0x001B, /* not all adapters */ PowerDownFull = 0x001C, /* not all adapters */ PowerAuto = 0x001D, /* not all adapters */ }; enum { /* (Global|Rx|Tx)Reset command bits */ tpAuiReset = 0x0001, /* 10BaseT and AUI transceivers */ endecReset = 0x0002, /* internal Ethernet encoder/decoder */ networkReset = 0x0004, /* network interface logic */ fifoReset = 0x0008, /* FIFO control logic */ aismReset = 0x0010, /* autoinitialise state-machine logic */ hostReset = 0x0020, /* bus interface logic */ dmaReset = 0x0040, /* bus master logic */ vcoReset = 0x0080, /* on-board 10Mbps VCO */ updnReset = 0x0100, /* upload/download (Rx/TX) logic */ resetMask = 0x01FF, }; enum { /* Stall command bits */ upStall = 0x0000, upUnStall = 0x0001, dnStall = 0x0002, dnUnStall = 0x0003, }; enum { /* SetRxFilter command bits */ receiveIndividual = 0x0001, /* match station address */ receiveMulticast = 0x0002, receiveBroadcast = 0x0004, receiveAllFrames = 0x0008, /* promiscuous */ }; enum { /* StartDma command bits */ Upload = 0x0000, /* transfer data from adapter to memory */ Download = 0x0001, /* transfer data from memory to adapter */ }; enum { /* IntStatus bits */ interruptLatch = 0x0001, hostError = 0x0002, /* Adapter Failure */ txComplete = 0x0004, txAvailable = 0x0008, rxComplete = 0x0010, rxEarly = 0x0020, intRequested = 0x0040, updateStats = 0x0080, transferInt = 0x0100, /* Bus Master Transfer Complete */ dnComplete = 0x0200, upComplete = 0x0400, busMasterInProgress = 0x0800, commandInProgress = 0x1000, interruptMask = 0x07FE, }; #define COMMAND(port, cmd, a) outs((port)+CommandR, ((cmd)<<11)|(a)) #define STATUS(port) ins((port)+IntStatusR) enum { /* Window 0 - setup */ Wsetup = 0x0000, /* registers */ ManufacturerID = 0x0000, /* 3C5[08]*, 3C59[27] */ ProductID = 0x0002, /* 3C5[08]*, 3C59[27] */ ConfigControl = 0x0004, /* 3C5[08]*, 3C59[27] */ AddressConfig = 0x0006, /* 3C5[08]*, 3C59[27] */ ResourceConfig = 0x0008, /* 3C5[08]*, 3C59[27] */ EepromCommand = 0x000A, EepromData = 0x000C, /* AddressConfig Bits */ autoSelect9 = 0x0080, xcvrMask9 = 0xC000, /* ConfigControl bits */ Ena = 0x0001, base10TAvailable9 = 0x0200, coaxAvailable9 = 0x1000, auiAvailable9 = 0x2000, /* EepromCommand bits */ _EepromReadRegister = 0x0080, _EepromRead8bRegister = 0x0230, EepromBusy = 0x8000, }; static int EepromReadRegister = _EepromReadRegister; #define EEPROMCMD(port, cmd, a) outs((port)+EepromCommand, (cmd)|(a)) #define EEPROMBUSY(port) (ins((port)+EepromCommand) & EepromBusy) #define EEPROMDATA(port) ins((port)+EepromData) enum { /* Window 1 - operating set */ Wop = 0x0001, /* registers */ Fifo = 0x0000, RxError = 0x0004, /* 3C59[0257] only */ RxStatus = 0x0008, Timer = 0x000A, TxStatus = 0x000B, TxFree = 0x000C, /* RxError bits */ rxOverrun = 0x0001, runtFrame = 0x0002, alignmentError = 0x0004, /* Framing */ crcError = 0x0008, oversizedFrame = 0x0010, dribbleBits = 0x0080, /* RxStatus bits */ rxBytes = 0x1FFF, /* 3C59[0257] mask */ rxBytes9 = 0x07FF, /* 3C5[078]9 mask */ rxError9 = 0x3800, /* 3C5[078]9 error mask */ rxOverrun9 = 0x0000, oversizedFrame9 = 0x0800, dribbleBits9 = 0x1000, runtFrame9 = 0x1800, alignmentError9 = 0x2000, /* Framing */ crcError9 = 0x2800, rxError = 0x4000, rxIncomplete = 0x8000, /* TxStatus Bits */ txStatusOverflow = 0x0004, maxCollisions = 0x0008, txUnderrun = 0x0010, txJabber = 0x0020, interruptRequested = 0x0040, txStatusComplete = 0x0080, }; enum { /* Window 2 - station address */ Wstation = 0x0002, ResetOp905B = 0x000C, }; enum { /* Window 3 - FIFO management */ Wfifo = 0x0003, /* registers */ InternalConfig = 0x0000, /* 3C509B, 3C589, 3C59[0257] */ OtherInt = 0x0004, /* 3C59[0257] */ RomControl = 0x0006, /* 3C509B, 3C59[27] */ MacControl = 0x0006, /* 3C59[0257] */ ResetOptions = 0x0008, /* 3C59[0257] */ MediaOptions = 0x0008, /* 3C905B */ RxFree = 0x000A, /* InternalConfig bits */ disableBadSsdDetect = 0x00000100, ramLocation = 0x00000200, /* 0 external, 1 internal */ ramPartition5to3 = 0x00000000, ramPartition3to1 = 0x00010000, ramPartition1to1 = 0x00020000, ramPartition3to5 = 0x00030000, ramPartitionMask = 0x00030000, xcvr10BaseT = 0x00000000, xcvrAui = 0x00100000, /* 10BASE5 */ xcvr10Base2 = 0x00300000, xcvr100BaseTX = 0x00400000, xcvr100BaseFX = 0x00500000, xcvrMii = 0x00600000, xcvrMask = 0x00700000, autoSelect = 0x01000000, /* MacControl bits */ deferExtendEnable = 0x0001, deferTimerSelect = 0x001E, /* mask */ fullDuplexEnable = 0x0020, allowLargePackets = 0x0040, extendAfterCollision = 0x0080, /* 3C90xB */ flowControlEnable = 0x0100, /* 3C90xB */ vltEnable = 0x0200, /* 3C90xB */ /* ResetOptions bits */ baseT4Available = 0x0001, baseTXAvailable = 0x0002, baseFXAvailable = 0x0004, base10TAvailable = 0x0008, coaxAvailable = 0x0010, auiAvailable = 0x0020, miiConnector = 0x0040, }; enum { /* Window 4 - diagnostic */ Wdiagnostic = 0x0004, /* registers */ VcoDiagnostic = 0x0002, FifoDiagnostic = 0x0004, NetworkDiagnostic = 0x0006, PhysicalMgmt = 0x0008, MediaStatus = 0x000A, BadSSD = 0x000C, UpperBytesOk = 0x000D, /* FifoDiagnostic bits */ txOverrun = 0x0400, rxUnderrun = 0x2000, receiving = 0x8000, /* PhysicalMgmt bits */ mgmtClk = 0x0001, mgmtData = 0x0002, mgmtDir = 0x0004, cat5LinkTestDefeat = 0x8000, /* MediaStatus bits */ dataRate100 = 0x0002, crcStripDisable = 0x0004, enableSqeStats = 0x0008, collisionDetect = 0x0010, carrierSense = 0x0020, jabberGuardEnable = 0x0040, linkBeatEnable = 0x0080, jabberDetect = 0x0200, polarityReversed = 0x0400, linkBeatDetect = 0x0800, txInProg = 0x1000, dcConverterEnabled = 0x4000, auiDisable = 0x8000, /* 10BaseT transceiver selected */ }; enum { /* Window 5 - internal state */ Wstate = 0x0005, /* registers */ TxStartThresh = 0x0000, TxAvailableThresh = 0x0002, RxEarlyThresh = 0x0006, RxFilter = 0x0008, InterruptEnable = 0x000A, IndicationEnable = 0x000C, }; enum { /* Window 6 - statistics */ Wstatistics = 0x0006, /* registers */ CarrierLost = 0x0000, SqeErrors = 0x0001, MultipleColls = 0x0002, SingleCollFrames = 0x0003, LateCollisions = 0x0004, RxOverruns = 0x0005, FramesXmittedOk = 0x0006, FramesRcvdOk = 0x0007, FramesDeferred = 0x0008, UpperFramesOk = 0x0009, BytesRcvdOk = 0x000A, BytesXmittedOk = 0x000C, }; enum { /* Window 7 - bus master operations */ Wmaster = 0x0007, /* registers */ MasterAddress = 0x0000, MasterLen = 0x0006, MasterStatus = 0x000C, /* MasterStatus bits */ masterAbort = 0x0001, targetAbort = 0x0002, targetRetry = 0x0004, targetDisc = 0x0008, masterDownload = 0x1000, masterUpload = 0x4000, masterInProgress = 0x8000, masterMask = 0xD00F, }; enum { /* 3C90x extended register set */ Timer905 = 0x001A, /* 8-bits */ TxStatus905 = 0x001B, /* 8-bits */ PktStatus = 0x0020, /* 32-bits */ DnListPtr = 0x0024, /* 32-bits, 8-byte aligned */ FragAddr = 0x0028, /* 32-bits */ FragLen = 0x002C, /* 16-bits */ ListOffset = 0x002E, /* 8-bits */ TxFreeThresh = 0x002F, /* 8-bits */ UpPktStatus = 0x0030, /* 32-bits */ FreeTimer = 0x0034, /* 16-bits */ UpListPtr = 0x0038, /* 32-bits, 8-byte aligned */ /* PktStatus bits */ fragLast = 0x00000001, dnCmplReq = 0x00000002, dnStalled = 0x00000004, upCompleteX = 0x00000008, dnCompleteX = 0x00000010, upRxEarlyEnable = 0x00000020, armCountdown = 0x00000040, dnInProg = 0x00000080, counterSpeed = 0x00000010, /* 0 3.2uS, 1 320nS */ countdownMode = 0x00000020, /* UpPktStatus bits (dpd->control) */ upPktLenMask = 0x00001FFF, upStalled = 0x00002000, upError = 0x00004000, upPktComplete = 0x00008000, upOverrun = 0x00010000, /* RxError<<16 */ upRuntFrame = 0x00020000, upAlignmentError = 0x00040000, upCRCError = 0x00080000, upOversizedFrame = 0x00100000, upDribbleBits = 0x00800000, upOverflow = 0x01000000, dnIndicate = 0x80000000, /* FrameStartHeader (dpd->control) */ updnLastFrag = 0x80000000, /* (dpd->len) */ Nup = 32, Ndn = 64, }; /* * Up/Dn Packet Descriptors. * The hardware info (np, control, addr, len) must be 8-byte aligned * and this structure size must be a multiple of 8. */ typedef struct Pd Pd; typedef struct Pd { ulong np; /* next pointer */ ulong control; /* FSH or UpPktStatus */ ulong addr; ulong len; Pd* next; void *vaddr; } Pd; typedef struct { Lock wlock; /* window access */ int attached; int busmaster; Block* rbp; /* receive buffer */ Block* txbp; /* FIFO -based transmission */ int txthreshold; int txbusy; int nup; /* full-busmaster -based reception */ void* upbase; Pd* upr; Pd* uphead; int ndn; /* full-busmaster -based transmission */ void* dnbase; Pd* dnr; Pd* dnhead; Pd* dntail; int dnq; long interrupts; /* statistics */ long timer[2]; long stats[BytesRcvdOk+3]; int upqmax; int upqmaxhw; ulong upinterrupts; ulong upqueued; ulong upstalls; int dnqmax; int dnqmaxhw; ulong dninterrupts; ulong dnqueued; int xcvr; /* transceiver type */ int rxstatus9; /* old-style RxStatus register */ int rxearly; /* RxEarlyThreshold */ int ts; /* threshold shift */ int upenabled; int dnenabled; } Ctlr; static void init905(Ctlr* ctlr) { Pd *pd, *prev; uchar *vaddr; /* * Create rings for the receive and transmit sides. * Take care with alignment: * make sure ring base is 8-byte aligned; * make sure each entry is 8-byte aligned. */ ctlr->upbase = malloc((ctlr->nup+1)*sizeof(Pd)); ctlr->upr = (Pd*)ROUNDUP((ulong)ctlr->upbase, 8); vaddr = ialloc((ctlr->nup+1)*ROUNDUP(sizeof(Etherpkt)+4, 8), 8); prev = ctlr->upr; for(pd = &ctlr->upr[ctlr->nup-1]; pd >= ctlr->upr; pd--){ pd->np = PADDR(&prev->np); pd->control = 0; pd->vaddr = vaddr; pd->addr = PADDR(vaddr); vaddr += ROUNDUP(sizeof(Etherpkt)+4, 8); pd->len = updnLastFrag|sizeof(Etherpkt); pd->next = prev; prev = pd; } ctlr->uphead = ctlr->upr; ctlr->dnbase = malloc((ctlr->ndn+1)*sizeof(Pd)); ctlr->dnr = (Pd*)ROUNDUP((ulong)ctlr->dnbase, 8); vaddr = ialloc((ctlr->ndn+1)*ROUNDUP(sizeof(Etherpkt)+4, 8), 8); prev = ctlr->dnr; for(pd = &ctlr->dnr[ctlr->ndn-1]; pd >= ctlr->dnr; pd--){ pd->next = prev; pd->vaddr = vaddr; pd->addr = PADDR(vaddr); vaddr += ROUNDUP(sizeof(Etherpkt)+4, 8); prev = pd; } ctlr->dnhead = ctlr->dnr; ctlr->dntail = ctlr->dnr; ctlr->dnq = 0; } static Block* rbpalloc(Block* (*f)(int)) { Block *bp; ulong addr; /* * The receive buffers must be on a 32-byte * boundary for EISA busmastering. */ if(bp = f(ROUNDUP(sizeof(Etherpkt), 4) + 31)){ addr = (ulong)bp->base; addr = ROUNDUP(addr, 32); bp->rp = (uchar*)addr; } return bp; } static uchar* startdma(Ether* ether, ulong address) { int port, status, w; uchar *wp; port = ether->port; w = (STATUS(port)>>13) & 0x07; COMMAND(port, SelectRegisterWindow, Wmaster); wp = KADDR(inl(port+MasterAddress)); status = ins(port+MasterStatus); if(status & (masterInProgress|targetAbort|masterAbort)) print("#l%d: BM status 0x%uX\n", ether->ctlrno, status); outs(port+MasterStatus, masterMask); outl(port+MasterAddress, address); outs(port+MasterLen, sizeof(Etherpkt)); COMMAND(port, StartDma, Upload); COMMAND(port, SelectRegisterWindow, w); return wp; } /* On the 575B and C, interrupts need to be acknowledged in CardBus memory space */ static void intrack3c575(ulong *cbfns) { cbfns[1] = 0x8000; } static void attach(Ether* ether) { int port, x; Ctlr *ctlr; ctlr = ether->ctlr; ilock(&ctlr->wlock); if(ctlr->attached){ iunlock(&ctlr->wlock); return; } port = ether->port; COMMAND(port, SetRxFilter, receiveIndividual|receiveBroadcast); x = interruptMask; if(ctlr->busmaster == 1) x &= ~(rxEarly|rxComplete); else{ if(ctlr->dnenabled) x &= ~transferInt; if(ctlr->upenabled) x &= ~(rxEarly|rxComplete); } COMMAND(port, SetIndicationEnable, x); COMMAND(port, SetInterruptEnable, x); COMMAND(port, RxEnable, 0); COMMAND(port, TxEnable, 0); if (ether->mem) /* This must be a cardbus card. Acknowledge the interrupt */ intrack3c575(KADDR(ether->mem)); /* * Prime the busmaster channel for receiving directly into a * receive packet buffer if necessary. */ if(ctlr->busmaster == 1) startdma(ether, PADDR(ctlr->rbp->rp)); else{ if(ctlr->upenabled) outl(port+UpListPtr, PADDR(&ctlr->uphead->np)); } ctlr->attached = 1; iunlock(&ctlr->wlock); } static void statistics(Ether* ether) { int port, i, u, w; Ctlr *ctlr; port = ether->port; ctlr = ether->ctlr; /* * 3C59[27] require a read between a PIO write and * reading a statistics register. */ w = (STATUS(port)>>13) & 0x07; COMMAND(port, SelectRegisterWindow, Wstatistics); STATUS(port); for(i = 0; i < UpperFramesOk; i++) ctlr->stats[i] += inb(port+i) & 0xFF; u = inb(port+UpperFramesOk) & 0xFF; ctlr->stats[FramesXmittedOk] += (u & 0x30)<<4; ctlr->stats[FramesRcvdOk] += (u & 0x03)<<8; ctlr->stats[BytesRcvdOk] += ins(port+BytesRcvdOk) & 0xFFFF; ctlr->stats[BytesRcvdOk+1] += ins(port+BytesXmittedOk) & 0xFFFF; switch(ctlr->xcvr){ case xcvrMii: case xcvr100BaseTX: case xcvr100BaseFX: COMMAND(port, SelectRegisterWindow, Wdiagnostic); STATUS(port); ctlr->stats[BytesRcvdOk+2] += inb(port+BadSSD); break; } COMMAND(port, SelectRegisterWindow, w); } static void txstart(Ether* ether) { int port, len; Ctlr *ctlr; RingBuf *tb; port = ether->port; ctlr = ether->ctlr; /* * Attempt to top-up the transmit FIFO. If there's room simply * stuff in the packet length (unpadded to a dword boundary), the * packet data (padded) and remove the packet from the queue. * If there's no room post an interrupt for when there is. * This routine is called both from the top level and from interrupt * level and expects to be called with ctlr->wlock already locked * and the correct register window (Wop) in place. */ for(tb = ðer->tb[ether->ti]; tb->owner == Interface; tb = ðer->tb[ether->ti]){ len = ROUNDUP(tb->len, 4); if(len+4 <= ins(port+TxFree)){ outl(port+Fifo, tb->len); outsl(port+Fifo, tb->pkt, len/4); tb->owner = Host; ether->ti = NEXT(ether->ti, ether->ntb); } else{ if(ctlr->txbusy == 0){ ctlr->txbusy = 1; COMMAND(port, SetTxAvailableThresh, len>>ctlr->ts); } break; } } } static void txstart905(Ether* ether) { Ctlr *ctlr; int port, stalled, timeo; RingBuf *tb; Pd *pd; ctlr = ether->ctlr; port = ether->port; /* * Free any completed packets. */ pd = ctlr->dntail; while(ctlr->dnq){ if(PADDR(&pd->np) == inl(port+DnListPtr)) break; ctlr->dnq--; pd = pd->next; } ctlr->dntail = pd; stalled = 0; while(ctlr->dnq < (ctlr->ndn-1)){ tb = ðer->tb[ether->ti]; if(tb->owner != Interface) break; pd = ctlr->dnhead->next; pd->np = 0; pd->control = dnIndicate|tb->len; memmove(pd->vaddr, tb->pkt, tb->len); pd->len = updnLastFrag|tb->len; tb->owner = Host; ether->ti = NEXT(ether->ti, ether->ntb); if(stalled == 0 && ctlr->dnq && inl(port+DnListPtr)){ COMMAND(port, Stall, dnStall); for(timeo = 100; (STATUS(port) & commandInProgress) && timeo; timeo--) ; if(timeo == 0) print("#l%d: dnstall %d\n", ether->ctlrno, timeo); stalled = 1; } coherence(); ctlr->dnhead->np = PADDR(&pd->np); ctlr->dnhead->control &= ~dnIndicate; ctlr->dnhead = pd; if(ctlr->dnq == 0) ctlr->dntail = pd; ctlr->dnq++; ctlr->dnqueued++; } if(ctlr->dnq > ctlr->dnqmax) ctlr->dnqmax = ctlr->dnq; /* * If the adapter is not currently processing anything * and there is something on the queue, start it processing. */ if(inl(port+DnListPtr) == 0 && ctlr->dnq) outl(port+DnListPtr, PADDR(&ctlr->dnhead->np)); if(stalled) COMMAND(port, Stall, dnUnStall); } static void transmit(Ether* ether) { Ctlr *ctlr; int port, w; port = ether->port; ctlr = ether->ctlr; ilock(&ctlr->wlock); if(ctlr->dnenabled) txstart905(ether); else{ w = (STATUS(port)>>13) & 0x07; COMMAND(port, SelectRegisterWindow, Wop); txstart(ether); COMMAND(port, SelectRegisterWindow, w); } iunlock(&ctlr->wlock); } static void receive905(Ether* ether) { Ctlr *ctlr; int len, port, q; Pd *pd; RingBuf *rb; ctlr = ether->ctlr; port = ether->port; if(inl(port+UpPktStatus) & upStalled) ctlr->upstalls++; q = 0; for(pd = ctlr->uphead; pd->control & upPktComplete; pd = pd->next){ if(!(pd->control & upError)){ rb = ðer->rb[ether->ri]; if (rb->owner == Interface) { len = pd->control & rxBytes; rb->len = len; memmove(rb->pkt, pd->vaddr, len); rb->owner = Host; ether->ri = NEXT(ether->ri, ether->nrb); } } pd->control = 0; COMMAND(port, Stall, upUnStall); q++; } ctlr->uphead = pd; ctlr->upqueued += q; if(q > ctlr->upqmax) ctlr->upqmax = q; } static void receive(Ether* ether) { int len, port, rxstatus; RingBuf *rb; Ctlr *ctlr; port = ether->port; ctlr = ether->ctlr; while(((rxstatus = ins(port+RxStatus)) & rxIncomplete) == 0){ if(ctlr->busmaster == 1 && (STATUS(port) & busMasterInProgress)) break; /* * If there was an error, log it and continue. * Unfortunately the 3C5[078]9 has the error info in the status register * and the 3C59[0257] implement a separate RxError register. */ if((rxstatus & rxError) == 0){ /* * Packet received. Read it into the next free * ring buffer, if any. Must read len bytes padded * to a doubleword, can be picked out 32-bits at * a time. The CRC is already stripped off. */ rb = ðer->rb[ether->ri]; if(rb->owner == Interface){ len = (rxstatus & rxBytes9); rb->len = len; insl(port+Fifo, rb->pkt, HOWMANY(len, 4)); rb->owner = Host; ether->ri = NEXT(ether->ri, ether->nrb); }else if(debug) print("toss..."); } else if(debug) print("error..."); /* * All done, discard the packet. */ COMMAND(port, RxDiscard, 0); while(STATUS(port) & commandInProgress) ; } } static void interrupt(Ureg*, void* arg) { Ether *ether; int port, status, s, txstatus, w, x; Ctlr *ctlr; ether = arg; port = ether->port; ctlr = ether->ctlr; ilock(&ctlr->wlock); status = STATUS(port); if(!(status & (interruptMask|interruptLatch))){ iunlock(&ctlr->wlock); return; } w = (status>>13) & 0x07; COMMAND(port, SelectRegisterWindow, Wop); ctlr->interrupts++; if(ctlr->busmaster == 2) ctlr->timer[0] += inb(port+Timer905) & 0xFF; else ctlr->timer[0] += inb(port+Timer) & 0xFF; do{ if(status & hostError){ /* * Adapter failure, try to find out why, reset if * necessary. What happens if Tx is active and a reset * occurs, need to retransmit? This probably isn't right. */ COMMAND(port, SelectRegisterWindow, Wdiagnostic); x = ins(port+FifoDiagnostic); COMMAND(port, SelectRegisterWindow, Wop); print("#l%d: status 0x%uX, diag 0x%uX\n", ether->ctlrno, status, x); if(x & txOverrun){ if(ctlr->busmaster == 0) COMMAND(port, TxReset, 0); else COMMAND(port, TxReset, (updnReset|dmaReset)); COMMAND(port, TxEnable, 0); } if(x & rxUnderrun){ /* * This shouldn't happen... * Reset the receiver and restore the filter and RxEarly * threshold before re-enabling. * Need to restart any busmastering? */ COMMAND(port, SelectRegisterWindow, Wstate); s = (port+RxFilter) & 0x000F; COMMAND(port, SelectRegisterWindow, Wop); COMMAND(port, RxReset, 0); while(STATUS(port) & commandInProgress) ; COMMAND(port, SetRxFilter, s); COMMAND(port, SetRxEarlyThresh, ctlr->rxearly>>ctlr->ts); COMMAND(port, RxEnable, 0); } status &= ~hostError; } if(status & (transferInt|rxComplete)){ receive(ether); status &= ~(transferInt|rxComplete); } if(status & (upComplete)){ COMMAND(port, AcknowledgeInterrupt, upComplete); receive905(ether); status &= ~upComplete; ctlr->upinterrupts++; } if(status & txComplete){ /* * Pop the TxStatus stack, accumulating errors. * Adjust the TX start threshold if there was an underrun. * If there was a Jabber or Underrun error, reset * the transmitter, taking care not to reset the dma logic * as a busmaster receive may be in progress. * For all conditions enable the transmitter. */ if(ctlr->busmaster == 2) txstatus = port+TxStatus905; else txstatus = port+TxStatus; s = 0; do{ if(x = inb(txstatus)) outb(txstatus, 0); s |= x; }while(STATUS(port) & txComplete); if(s & txUnderrun){ if(ctlr->dnenabled){ while(inl(port+PktStatus) & dnInProg) ; } COMMAND(port, SelectRegisterWindow, Wdiagnostic); while(ins(port+MediaStatus) & txInProg) ; COMMAND(port, SelectRegisterWindow, Wop); if(ctlr->txthreshold < ETHERMAXTU) ctlr->txthreshold += ETHERMINTU; } /* * According to the manual, maxCollisions does not require * a TxReset, merely a TxEnable. However, evidence points to * it being necessary on the 3C905. The jury is still out. * On busy or badly configured networks maxCollisions can * happen frequently enough for messages to be annoying so * keep quiet about them by popular request. */ if(s & (txJabber|txUnderrun|maxCollisions)){ if(ctlr->busmaster == 0) COMMAND(port, TxReset, 0); else COMMAND(port, TxReset, (updnReset|dmaReset)); while(STATUS(port) & commandInProgress) ; COMMAND(port, SetTxStartThresh, ctlr->txthreshold>>ctlr->ts); if(ctlr->busmaster == 2) outl(port+TxFreeThresh, HOWMANY(ETHERMAXTU, 256)); if(ctlr->dnenabled) status |= dnComplete; } if(s & ~(txStatusComplete|maxCollisions)) print("#l%d: txstatus 0x%uX, threshold %d\n", ether->ctlrno, s, ctlr->txthreshold); COMMAND(port, TxEnable, 0); status &= ~txComplete; status |= txAvailable; } if(status & txAvailable){ COMMAND(port, AcknowledgeInterrupt, txAvailable); ctlr->txbusy = 0; txstart(ether); status &= ~txAvailable; } if(status & dnComplete){ COMMAND(port, AcknowledgeInterrupt, dnComplete); txstart905(ether); status &= ~dnComplete; ctlr->dninterrupts++; } if(status & updateStats){ statistics(ether); status &= ~updateStats; } /* * Currently, this shouldn't happen. */ if(status & rxEarly){ COMMAND(port, AcknowledgeInterrupt, rxEarly); status &= ~rxEarly; } /* * Panic if there are any interrupts not dealt with. */ if(status & interruptMask) panic("#l%d: interrupt mask 0x%uX\n", ether->ctlrno, status); COMMAND(port, AcknowledgeInterrupt, interruptLatch); if (ether->mem) intrack3c575((ulong *)KADDR(ether->mem)); }while((status = STATUS(port)) & (interruptMask|interruptLatch)); if(ctlr->busmaster == 2) ctlr->timer[1] += inb(port+Timer905) & 0xFF; else ctlr->timer[1] += inb(port+Timer) & 0xFF; COMMAND(port, SelectRegisterWindow, w); iunlock(&ctlr->wlock); } static void txrxreset(int port) { COMMAND(port, TxReset, 0); while(STATUS(port) & commandInProgress) ; COMMAND(port, RxReset, 0); while(STATUS(port) & commandInProgress) ; } typedef struct Adapter { int port; int irq; int tbdf; ulong cbfns; } Adapter; static Block* adapter; static void tcmadapter(int port, int irq, int tbdf, ulong cbfns) { Block *bp; Adapter *ap; bp = allocb(sizeof(Adapter)); ap = (Adapter*)bp->rp; ap->port = port; ap->irq = irq; ap->tbdf = tbdf; ap->cbfns = cbfns; bp->next = adapter; adapter = bp; } /* * Write two 0 bytes to identify the IDport and then reset the * ID sequence. Then send the ID sequence to the card to get * the card into command state. */ static void idseq(void) { int i; uchar al; static int reset, untag; /* * One time only: * reset any adapters listening */ if(reset == 0){ outb(IDport, 0); outb(IDport, 0); outb(IDport, 0xC0); delay(20); reset = 1; } outb(IDport, 0); outb(IDport, 0); for(al = 0xFF, i = 0; i < 255; i++){ outb(IDport, al); if(al & 0x80){ al <<= 1; al ^= 0xCF; } else al <<= 1; } /* * One time only: * write ID sequence to get the attention of all adapters; * untag all adapters. * If a global reset is done here on all adapters it will confuse * any ISA cards configured for EISA mode. */ if(untag == 0){ outb(IDport, 0xD0); untag = 1; } } static ulong activate(void) { int i; ushort x, acr; /* * Do the little configuration dance: * * 2. write the ID sequence to get to command state. */ idseq(); /* * 3. Read the Manufacturer ID from the EEPROM. * This is done by writing the IDPort with 0x87 (0x80 * is the 'read EEPROM' command, 0x07 is the offset of * the Manufacturer ID field in the EEPROM). * The data comes back 1 bit at a time. * A delay seems necessary between reading the bits. * * If the ID doesn't match, there are no more adapters. */ outb(IDport, 0x87); delay(20); for(x = 0, i = 0; i < 16; i++){ delay(20); x <<= 1; x |= inb(IDport) & 0x01; } if(x != 0x6D50) return 0; /* * 3. Read the Address Configuration from the EEPROM. * The Address Configuration field is at offset 0x08 in the EEPROM). */ outb(IDport, 0x88); for(acr = 0, i = 0; i < 16; i++){ delay(20); acr <<= 1; acr |= inb(IDport) & 0x01; } return (acr & 0x1F)*0x10 + 0x200; } static void tcm509isa(void) { int irq, port; /* * Attempt to activate all adapters. If adapter is set for * EISA mode (0x3F0), tag it and ignore. Otherwise, activate * it fully. */ while(port = activate()){ /* * 6. Tag the adapter so it won't respond in future. */ outb(IDport, 0xD1); if(port == 0x3F0) continue; /* * 6. Activate the adapter by writing the Activate command * (0xFF). */ outb(IDport, 0xFF); delay(20); /* * 8. Can now talk to the adapter's I/O base addresses. * Use the I/O base address from the acr just read. * * Enable the adapter and clear out any lingering status * and interrupts. */ while(STATUS(port) & commandInProgress) ; COMMAND(port, SelectRegisterWindow, Wsetup); outs(port+ConfigControl, Ena); txrxreset(port); COMMAND(port, AcknowledgeInterrupt, 0xFF); irq = (ins(port+ResourceConfig)>>12) & 0x0F; tcmadapter(port, irq, BUSUNKNOWN, 0); } } static void tcm5XXeisa(void) { ushort x; int irq, port, slot; /* * Check if this is an EISA machine. * If not, nothing to do. */ if(strncmp((char*)KADDR(0xFFFD9), "EISA", 4)) return; /* * Continue through the EISA slots looking for a match on both * 3COM as the manufacturer and 3C579-* or 3C59[27]-* as the product. * If an adapter is found, select window 0, enable it and clear * out any lingering status and interrupts. */ for(slot = 1; slot < MaxEISA; slot++){ port = slot*0x1000; if(ins(port+0xC80+ManufacturerID) != 0x6D50) continue; x = ins(port+0xC80+ProductID); if((x & 0xF0FF) != 0x9050 && (x & 0xFF00) != 0x5900) continue; COMMAND(port, SelectRegisterWindow, Wsetup); outs(port+ConfigControl, Ena); txrxreset(port); COMMAND(port, AcknowledgeInterrupt, 0xFF); irq = (ins(port+ResourceConfig)>>12) & 0x0F; tcmadapter(port, irq, BUSUNKNOWN, 0); } } static void tcm59Xpci(Ether *ether) { Pcidev *p; int irq, port; ulong bar; p = nil; while(p = pcimatch(p, 0x10B7, 0)){ if (p->did == 0x5157) { EepromReadRegister = _EepromRead8bRegister; /* Map the CardBus functions */ bar = pcicfgr32(p, PciBAR2); print("ether#%d: CardBus functions at %.8luX\n", ether->ctlrno, bar & ~KZERO); } else bar = 0; /* * Not prepared to deal with memory-mapped * devices yet. */ if(!(p->mem[0].bar & 0x01)) continue; port = p->mem[0].bar & ~0x01; irq = p->intl; COMMAND(port, GlobalReset, 0); while(STATUS(port) & commandInProgress) ; tcmadapter(port, irq, p->tbdf, bar); pcisetbme(p); } } static char* tcmpcmcia[] = { "3C589", /* 3COM 589[ABCD] */ "3C562", /* 3COM 562 */ "589E", /* 3COM Megahertz 589E */ nil, }; static int tcm5XXpcmcia(Ether* ether) { int i; for(i = 0; tcmpcmcia[i] != nil; i++){ if(!cistrcmp(ether->type, tcmpcmcia[i])){ /* * No need for an ioalloc here, the 589 reset * code deals with it. if(ioalloc(ether->port, 0x10, 0, "tcm5XXpcmcia") < 0) return 0; */ return ether->port; } } return 0; } static void setxcvr(int port, int xcvr, int is9) { int x; if(is9){ COMMAND(port, SelectRegisterWindow, Wsetup); x = ins(port+AddressConfig) & ~xcvrMask9; x |= (xcvr>>20)<<14; outs(port+AddressConfig, x); } else{ COMMAND(port, SelectRegisterWindow, Wfifo); x = inl(port+InternalConfig) & ~xcvrMask; x |= xcvr; outl(port+InternalConfig, x); } txrxreset(port); } static void setfullduplex(int port) { int x; COMMAND(port, SelectRegisterWindow, Wfifo); x = ins(port+MacControl); outs(port+MacControl, fullDuplexEnable|x); txrxreset(port); } static int miimdi(int port, int n) { int data, i; /* * Read n bits from the MII Management Register. */ data = 0; for(i = n-1; i >= 0; i--){ if(ins(port) & mgmtData) data |= (1<<i); microdelay(1); outs(port, mgmtClk); microdelay(1); outs(port, 0); microdelay(1); } return data; } static void miimdo(int port, int bits, int n) { int i, mdo; /* * Write n bits to the MII Management Register. */ for(i = n-1; i >= 0; i--){ if(bits & (1<<i)) mdo = mgmtDir|mgmtData; else mdo = mgmtDir; outs(port, mdo); microdelay(1); outs(port, mdo|mgmtClk); microdelay(1); outs(port, mdo); microdelay(1); } } static int miir(int port, int phyad, int regad) { int data, w; w = (STATUS(port)>>13) & 0x07; COMMAND(port, SelectRegisterWindow, Wdiagnostic); port += PhysicalMgmt; /* * Preamble; * ST+OP+PHYAD+REGAD; * TA + 16 data bits. */ miimdo(port, 0xFFFFFFFF, 32); miimdo(port, 0x1800|(phyad<<5)|regad, 14); data = miimdi(port, 18); port -= PhysicalMgmt; COMMAND(port, SelectRegisterWindow, w); if(data & 0x10000) return -1; return data & 0xFFFF; } static void scanphy(int port) { int i, x; for(i = 0; i < 32; i++){ if((x = miir(port, i, 2)) == -1 || x == 0) continue; x <<= 6; x |= miir(port, i, 3)>>10; XCVRDEBUG("phy%d: oui %uX reg1 %uX\n", i, x, miir(port, i, 1)); USED(x); } } #ifdef notdef static struct xxx { int available; int next; } xxx[8] = { { base10TAvailable, 1, }, /* xcvr10BaseT -> xcvrAui */ { auiAvailable, 3, }, /* xcvrAui -> xcvr10Base2 */ { 0, -1, }, { coaxAvailable, -1, }, /* xcvr10Base2 -> nowhere */ { baseTXAvailable, 5, }, /* xcvr100BaseTX-> xcvr100BaseFX */ { baseFXAvailable, -1, }, /* xcvr100BaseFX-> nowhere */ { miiConnector, -1, }, /* xcvrMii -> nowhere */ { 0, -1, }, }; #endif /* notdef */ static struct { char *name; int avail; int xcvr; } media[] = { "10BaseT", base10TAvailable, xcvr10BaseT, "10Base2", coaxAvailable, xcvr10Base2, "100BaseTX", baseTXAvailable, xcvr100BaseTX, "100BaseFX", baseFXAvailable, xcvr100BaseFX, "aui", auiAvailable, xcvrAui, "mii", miiConnector, xcvrMii }; static int autoselect(int port, int xcvr, int is9) { int media, x; USED(xcvr); /* * Pathetic attempt at automatic media selection. * Really just to get the Fast Etherlink 10BASE-T/100BASE-TX * cards operational. * It's a bonus if it works for anything else. */ if(is9){ COMMAND(port, SelectRegisterWindow, Wsetup); x = ins(port+ConfigControl); media = 0; if(x & base10TAvailable9) media |= base10TAvailable; if(x & coaxAvailable9) media |= coaxAvailable; if(x & auiAvailable9) media |= auiAvailable; } else{ COMMAND(port, SelectRegisterWindow, Wfifo); media = ins(port+ResetOptions); } XCVRDEBUG("autoselect: media %uX\n", media); if(media & miiConnector) return xcvrMii; COMMAND(port, SelectRegisterWindow, Wdiagnostic); XCVRDEBUG("autoselect: media status %uX\n", ins(port+MediaStatus)); if(media & baseTXAvailable){ /* * Must have InternalConfig register. */ setxcvr(port, xcvr100BaseTX, is9); COMMAND(port, SelectRegisterWindow, Wdiagnostic); x = ins(port+MediaStatus) & ~(dcConverterEnabled|jabberGuardEnable); outs(port+MediaStatus, linkBeatEnable|x); delay(10); if(ins(port+MediaStatus) & linkBeatDetect) return xcvr100BaseTX; outs(port+MediaStatus, x); } if(media & base10TAvailable){ setxcvr(port, xcvr10BaseT, is9); COMMAND(port, SelectRegisterWindow, Wdiagnostic); x = ins(port+MediaStatus) & ~dcConverterEnabled; outs(port+MediaStatus, linkBeatEnable|jabberGuardEnable|x); delay(100); XCVRDEBUG("autoselect: 10BaseT media status %uX\n", ins(port+MediaStatus)); if(ins(port+MediaStatus) & linkBeatDetect) return xcvr10BaseT; outs(port+MediaStatus, x); } /* * Botch. */ return autoSelect; } static int eepromdata(int port, int offset) { COMMAND(port, SelectRegisterWindow, Wsetup); while(EEPROMBUSY(port)) ; EEPROMCMD(port, EepromReadRegister, offset); while(EEPROMBUSY(port)) ; return EEPROMDATA(port); } int elnk3reset(Ether* ether) { int anar, anlpar, phyaddr, phystat, timeo, xcvr; int busmaster, did, i, j, port, rxearly, rxstatus9, x; Block *bp, **bpp; Adapter *ap; uchar ea[Eaddrlen]; Ctlr *ctlr; static int scandone; char *p; /* * Scan for adapter on PCI, EISA and finally * using the little ISA configuration dance. */ if(scandone == 0){ tcm59Xpci(ether); tcm5XXeisa(); tcm509isa(); scandone = 1; } /* * Any adapter matches if no ether->port is supplied, * otherwise the ports must match. */ port = 0; bpp = &adapter; for(bp = *bpp; bp; bp = bp->next){ ap = (Adapter*)bp->rp; if(ether->port == 0 || ether->port == ap->port){ port = ap->port; ether->irq = ap->irq; ether->tbdf = ap->tbdf; ether->mem = ap->cbfns; /* Misuse the mem ref for the cardbus functions */ *bpp = bp->next; freeb(bp); break; } bpp = &bp->next; } if(port == 0 && (port = tcm5XXpcmcia(ether)) == 0) return -1; /* * Read the DeviceID from the EEPROM, it's at offset 0x03, * and do something depending on capabilities. */ switch(did = eepromdata(port, 0x03)){ case 0x5157: /* 3C575 Cyclone */ case 0x4500: /* 3C450 HomePNA Tornado */ case 0x6056: case 0x7646: /* 3CSOHO100-TX */ case 0x9055: /* 3C905B-TX */ case 0x9200: /* 3C905C-TX */ /*FALLTHROUGH*/ case 0x9000: /* 3C900-TPO */ case 0x9001: /* 3C900-COMBO */ case 0x9005: /* 3C900B-COMBO */ case 0x9050: /* 3C905-TX */ case 0x9051: /* 3C905-T4 */ if(BUSTYPE(ether->tbdf) != BusPCI) goto buggery; busmaster = 2; goto vortex; case 0x5900: /* 3C590-[TP|COMBO|TPO] */ case 0x5920: /* 3C592-[TP|COMBO|TPO] */ case 0x5950: /* 3C595-TX */ case 0x5951: /* 3C595-T4 */ case 0x5952: /* 3C595-MII */ case 0x5970: /* 3C597-TX */ case 0x5971: /* 3C597-T4 */ case 0x5972: /* 3C597-MII */ busmaster = 1; vortex: COMMAND(port, SelectRegisterWindow, Wfifo); xcvr = inl(port+InternalConfig) & (autoSelect|xcvrMask); rxearly = 8188; rxstatus9 = 0; break; buggery: default: busmaster = 0; COMMAND(port, SelectRegisterWindow, Wsetup); x = ins(port+AddressConfig); xcvr = ((x & xcvrMask9)>>14)<<20; if(x & autoSelect9) xcvr |= autoSelect; rxearly = 2044; rxstatus9 = 1; break; } /* * Check if the adapter's station address is to be overridden. * If not, read it from the EEPROM and set in ether->ea prior to * loading the station address in Wstation. * The EEPROM returns 16-bits at a time. */ memset(ea, 0, Eaddrlen); if(memcmp(ea, ether->ea, Eaddrlen) == 0){ for(i = 0; i < Eaddrlen/2; i++){ x = eepromdata(port, i); ether->ea[2*i] = x>>8; ether->ea[2*i+1] = x; } } COMMAND(port, SelectRegisterWindow, Wstation); for(i = 0; i < Eaddrlen; i++) outb(port+i, ether->ea[i]); /* * Enable the transceiver if necessary and determine whether * busmastering can be used. Due to bugs in the first revision * of the 3C59[05], don't use busmastering at 10Mbps. */ XCVRDEBUG("reset: xcvr %uX\n", xcvr); /* * Allow user to specify desired media in plan9.ini */ for(i = 0; i < ether->nopt; i++){ if(cistrncmp(ether->opt[i], "media=", 6) != 0) continue; p = ether->opt[i]+6; for(j = 0; j < nelem(media); j++) if(cistrcmp(p, media[j].name) == 0) xcvr = media[j].xcvr; } /* * forgive me, but i am weak */ switch(did){ default: if(xcvr & autoSelect) xcvr = autoselect(port, xcvr, rxstatus9); break; case 0x4500: case 0x5157: case 0x6056: case 0x7646: case 0x9055: case 0x9200: xcvr = xcvrMii; txrxreset(port); XCVRDEBUG("905[BC] reset ops 0x%uX\n", ins(port+ResetOp905B)); if (did == 0x5157) { ushort reset_opts; COMMAND(port, SelectRegisterWindow, Wstation); reset_opts = ins(port + ResetOp905B); reset_opts |= 0x0010; /* Invert LED */ outs(port + ResetOp905B, reset_opts); } break; } XCVRDEBUG("autoselect returns: xcvr %uX, did 0x%uX\n", xcvr, did); switch(xcvr){ case xcvrMii: /* * Quick hack. scanphy(port); */ phyaddr = (did == 0x5157)? 0: 24; for(i = 0; i < 7; i++) XCVRDEBUG(" %2.2uX", miir(port, phyaddr, i)); XCVRDEBUG("\n"); for(timeo = 0; timeo < 30; timeo++){ phystat = miir(port, phyaddr, 0x01); if(phystat & 0x20) break; XCVRDEBUG(" %2.2uX", phystat); delay(100); } XCVRDEBUG(" %2.2uX", miir(port, phyaddr, 0x01)); XCVRDEBUG("\n"); anar = miir(port, phyaddr, 0x04); anlpar = miir(port, phyaddr, 0x05) & 0x03E0; anar &= anlpar; miir(port, phyaddr, 0x00); XCVRDEBUG("mii an: %uX anlp: %uX r0:%uX r1:%uX\n", anar, anlpar, miir(port, phyaddr, 0x00), miir(port, phyaddr, 0x01)); for(i = 0; i < ether->nopt; i++){ if(cistrcmp(ether->opt[i], "fullduplex") == 0) anar |= 0x0100; else if(cistrcmp(ether->opt[i], "100BASE-TXFD") == 0) anar |= 0x0100; else if(cistrcmp(ether->opt[i], "force100") == 0) anar |= 0x0080; } XCVRDEBUG("mii anar: %uX\n", anar); if(anar & 0x0100){ /* 100BASE-TXFD */ setfullduplex(port); } else if(anar & 0x0200){ /* 100BASE-T4 */ /* nothing to do */ } else if(anar & 0x0080){ /* 100BASE-TX */ /* nothing to do */; } else if(anar & 0x0040) /* 10BASE-TFD */ setfullduplex(port); else{ /* 10BASE-T */ /* nothing to do */; } break; case xcvr100BaseTX: case xcvr100BaseFX: COMMAND(port, SelectRegisterWindow, Wfifo); x = inl(port+InternalConfig) & ~ramPartitionMask; outl(port+InternalConfig, x|ramPartition1to1); COMMAND(port, SelectRegisterWindow, Wdiagnostic); x = ins(port+MediaStatus) & ~(dcConverterEnabled|jabberGuardEnable); x |= linkBeatEnable; outs(port+MediaStatus, x); break; case xcvr10BaseT: /* * Enable Link Beat and Jabber to start the * transceiver. */ COMMAND(port, SelectRegisterWindow, Wdiagnostic); x = ins(port+MediaStatus) & ~dcConverterEnabled; x |= linkBeatEnable|jabberGuardEnable; outs(port+MediaStatus, x); if((did & 0xFF00) == 0x5900) busmaster = 0; break; case xcvr10Base2: COMMAND(port, SelectRegisterWindow, Wdiagnostic); x = ins(port+MediaStatus) & ~(linkBeatEnable|jabberGuardEnable); outs(port+MediaStatus, x); /* * Start the DC-DC converter. * Wait > 800 microseconds. */ COMMAND(port, EnableDcConverter, 0); delay(1); break; } /* * Wop is the normal operating register set. * The 3C59[0257] adapters allow access to more than one register window * at a time, but there are situations where switching still needs to be * done, so just do it. * Clear out any lingering Tx status. */ COMMAND(port, SelectRegisterWindow, Wop); if(busmaster == 2) x = port+TxStatus905; else x = port+TxStatus; while(inb(x)) outb(x, 0); /* * Allocate a controller structure, clear out the * adapter statistics, clear the statistics logged into ctlr * and enable statistics collection. Xcvr is needed in order * to collect the BadSSD statistics. */ ether->ctlr = malloc(sizeof(Ctlr)); ctlr = ether->ctlr; ilock(&ctlr->wlock); ctlr->xcvr = xcvr; statistics(ether); memset(ctlr->stats, 0, sizeof(ctlr->stats)); ctlr->busmaster = busmaster; ctlr->xcvr = xcvr; ctlr->rxstatus9 = rxstatus9; ctlr->rxearly = rxearly; if(rxearly >= 2048) ctlr->ts = 2; COMMAND(port, StatisticsEnable, 0); /* * Allocate any receive buffers. */ if (ctlr->busmaster == 2) { ctlr->dnenabled = 1; /* * 10MUpldBug. * Disabling is too severe, can use receive busmastering at * 100Mbps OK, but how to tell which rate is actually being used - * the 3c905 always seems to have dataRate100 set? * Believe the bug doesn't apply if upRxEarlyEnable is set * and the threshold is set such that uploads won't start * until the whole packet has been received. */ ctlr->upenabled = 1; x = eepromdata(port, 0x0F); if(!(x & 0x01)) outl(port+PktStatus, upRxEarlyEnable); ctlr->nup = Nup; ctlr->ndn = Ndn; init905(ctlr); outl(port+TxFreeThresh, HOWMANY(ETHERMAXTU, 256)); } /* * Set a base TxStartThresh which will be incremented * if any txUnderrun errors occur and ensure no RxEarly * interrupts happen. */ ctlr->txthreshold = ETHERMAXTU/2; COMMAND(port, SetTxStartThresh, ctlr->txthreshold>>ctlr->ts); COMMAND(port, SetRxEarlyThresh, rxearly>>ctlr->ts); iunlock(&ctlr->wlock); /* * Linkage to the generic ethernet driver. */ ether->port = port; ether->attach = attach; ether->transmit = transmit; ether->interrupt = interrupt; return 0; }