ref: 21947578303cdb0fcb4b0cdfe80aa9dab5f6b447
dir: /os/pc/ether83815.c/
/*
* National Semiconductor DP83815
*
* Supports only internal PHY and has been tested on:
* Netgear FA311TX (using Netgear DS108 10/100 hub)
* To do:
* check Ethernet address;
* test autonegotiation on 10 Mbit, and 100 Mbit full duplex;
* external PHY via MII (should be common code for MII);
* thresholds;
* ring sizing;
* physical link changes/disconnect;
* push initialisation back to attach.
*
* C H Forsyth, forsyth@vitanuova.com, 18th June 2001.
*/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#include "../port/netif.h"
#include "etherif.h"
#define DEBUG (0)
#define debug if(DEBUG)print
enum {
Nrde = 64,
Ntde = 64,
};
#define Rbsz ROUNDUP(sizeof(Etherpkt)+4, 4)
typedef struct Des {
ulong next;
int cmdsts;
ulong addr;
Block* bp;
} Des;
enum { /* cmdsts */
Own = 1<<31, /* set by data producer to hand to consumer */
More = 1<<30, /* more of packet in next descriptor */
Intr = 1<<29, /* interrupt when device is done with it */
Supcrc = 1<<28, /* suppress crc on transmit */
Inccrc = 1<<28, /* crc included on receive (always) */
Ok = 1<<27, /* packet ok */
Size = 0xFFF, /* packet size in bytes */
/* transmit */
Txa = 1<<26, /* transmission aborted */
Tfu = 1<<25, /* transmit fifo underrun */
Crs = 1<<24, /* carrier sense lost */
Td = 1<<23, /* transmission deferred */
Ed = 1<<22, /* excessive deferral */
Owc = 1<<21, /* out of window collision */
Ec = 1<<20, /* excessive collisions */
/* 19-16 collision count */
/* receive */
Rxa = 1<<26, /* receive aborted (same as Rxo) */
Rxo = 1<<25, /* receive overrun */
Dest = 3<<23, /* destination class */
Drej= 0<<23, /* packet was rejected */
Duni= 1<<23, /* unicast */
Dmulti= 2<<23, /* multicast */
Dbroad= 3<<23, /* broadcast */
Long = 1<<22, /* too long packet received */
Runt = 1<<21, /* packet less than 64 bytes */
Ise = 1<<20, /* invalid symbol */
Crce = 1<<19, /* invalid crc */
Fae = 1<<18, /* frame alignment error */
Lbp = 1<<17, /* loopback packet */
Col = 1<<16, /* collision during receive */
};
enum { /* PCI vendor & device IDs */
Nat83815 = (0x0020<<16)|0x100B,
SiS = 0x1039,
SiS900 = (0x0900<<16)|SiS,
SiS7016 = (0x7016<<16)|SiS,
SiS630bridge = 0x0008,
/* SiS 900 PCI revision codes */
SiSrev630s = 0x81,
SiSrev630e = 0x82,
SiSrev630ea1 = 0x83,
SiSeenodeaddr = 8, /* short addr of SiS eeprom mac addr */
SiS630eenodeaddr = 9, /* likewise for the 630 */
Nseenodeaddr = 6, /* " for NS eeprom */
};
typedef struct Ctlr Ctlr;
typedef struct Ctlr {
int port;
Pcidev* pcidev;
Ctlr* next;
int active;
int id; /* (pcidev->did<<16)|pcidev->vid */
ushort srom[0xB+1];
uchar sromea[Eaddrlen]; /* MAC address */
uchar fd; /* option or auto negotiation */
int mbps;
Lock lock;
Des* rdr; /* receive descriptor ring */
int nrdr; /* size of rdr */
int rdrx; /* index into rdr */
Lock tlock;
Des* tdr; /* transmit descriptor ring */
int ntdr; /* size of tdr */
int tdrh; /* host index into tdr */
int tdri; /* interface index into tdr */
int ntq; /* descriptors active */
int ntqmax;
ulong rxa; /* receive statistics */
ulong rxo;
ulong rlong;
ulong runt;
ulong ise;
ulong crce;
ulong fae;
ulong lbp;
ulong col;
ulong rxsovr;
ulong rxorn;
ulong txa; /* transmit statistics */
ulong tfu;
ulong crs;
ulong td;
ulong ed;
ulong owc;
ulong ec;
ulong txurn;
ulong dperr; /* system errors */
ulong rmabt;
ulong rtabt;
ulong sserr;
ulong rxsover;
} Ctlr;
static Ctlr* ctlrhead;
static Ctlr* ctlrtail;
enum {
/* registers (could memory map) */
Rcr= 0x00, /* command register */
Rst= 1<<8,
Rxr= 1<<5, /* receiver reset */
Txr= 1<<4, /* transmitter reset */
Rxd= 1<<3, /* receiver disable */
Rxe= 1<<2, /* receiver enable */
Txd= 1<<1, /* transmitter disable */
Txe= 1<<0, /* transmitter enable */
Rcfg= 0x04, /* configuration */
Lnksts= 1<<31, /* link good */
Speed100= 1<<30, /* 100 Mb/s link */
Fdup= 1<<29, /* full duplex */
Pol= 1<<28, /* polarity reversal (10baseT) */
Aneg_dn= 1<<27, /* autonegotiation done */
Pint_acen= 1<<17, /* PHY interrupt auto clear enable */
Pause_adv= 1<<16, /* advertise pause during auto neg */
Paneg_ena= 1<<13, /* auto negotiation enable */
Paneg_all= 7<<13, /* auto negotiation enable 10/100 half & full */
Ext_phy= 1<<12, /* enable MII for external PHY */
Phy_rst= 1<<10, /* reset internal PHY */
Phy_dis= 1<<9, /* disable internal PHY (eg, low power) */
Req_alg= 1<<7, /* PCI bus request: set means less aggressive */
Sb= 1<<6, /* single slot back-off not random */
Pow= 1<<5, /* out of window timer selection */
Exd= 1<<4, /* disable excessive deferral timer */
Pesel= 1<<3, /* parity error algorithm selection */
Brom_dis= 1<<2, /* disable boot rom interface */
Bem= 1<<0, /* big-endian mode */
Rmear= 0x08, /* eeprom access */
Mdc= 1<<6, /* MII mangement check */
Mddir= 1<<5, /* MII management direction */
Mdio= 1<<4, /* MII mangement data */
Eesel= 1<<3, /* EEPROM chip select */
Eeclk= 1<<2, /* EEPROM clock */
Eedo= 1<<1, /* EEPROM data out (from chip) */
Eedi= 1<<0, /* EEPROM data in (to chip) */
Rptscr= 0x0C, /* pci test control */
Risr= 0x10, /* interrupt status */
Txrcmp= 1<<25, /* transmit reset complete */
Rxrcmp= 1<<24, /* receiver reset complete */
Dperr= 1<<23, /* detected parity error */
Sserr= 1<<22, /* signalled system error */
Rmabt= 1<<21, /* received master abort */
Rtabt= 1<<20, /* received target abort */
Rxsovr= 1<<16, /* RX status FIFO overrun */
Hiberr= 1<<15, /* high bits error set (OR of 25-16) */
Phy= 1<<14, /* PHY interrupt */
Pme= 1<<13, /* power management event (wake online) */
Swi= 1<<12, /* software interrupt */
Mib= 1<<11, /* MIB service */
Txurn= 1<<10, /* TX underrun */
Txidle= 1<<9, /* TX idle */
Txerr= 1<<8, /* TX packet error */
Txdesc= 1<<7, /* TX descriptor (with Intr bit done) */
Txok= 1<<6, /* TX ok */
Rxorn= 1<<5, /* RX overrun */
Rxidle= 1<<4, /* RX idle */
Rxearly= 1<<3, /* RX early threshold */
Rxerr= 1<<2, /* RX packet error */
Rxdesc= 1<<1, /* RX descriptor (with Intr bit done) */
Rxok= 1<<0, /* RX ok */
Rimr= 0x14, /* interrupt mask */
Rier= 0x18, /* interrupt enable */
Ie= 1<<0, /* interrupt enable */
Rtxdp= 0x20, /* transmit descriptor pointer */
Rtxcfg= 0x24, /* transmit configuration */
Csi= 1<<31, /* carrier sense ignore (needed for full duplex) */
Hbi= 1<<30, /* heartbeat ignore (needed for full duplex) */
Atp= 1<<28, /* automatic padding of runt packets */
Mxdma= 7<<20, /* maximum dma transfer field */
Mxdma32= 4<<20, /* 4x32-bit words (32 bytes) */
Mxdma64= 5<<20, /* 8x32-bit words (64 bytes) */
Flth= 0x3F<<8,/* Tx fill threshold, units of 32 bytes (must be > Mxdma) */
Drth= 0x3F<<0,/* Tx drain threshold (units of 32 bytes) */
Flth128= 4<<8, /* fill at 128 bytes */
Drth512= 16<<0, /* drain at 512 bytes */
Rrxdp= 0x30, /* receive descriptor pointer */
Rrxcfg= 0x34, /* receive configuration */
Atx= 1<<28, /* accept transmit packets (needed for full duplex) */
Rdrth= 0x1F<<1,/* Rx drain threshold (units of 32 bytes) */
Rdrth64= 2<<1, /* drain at 64 bytes */
Rccsr= 0x3C, /* CLKRUN control/status */
Pmests= 1<<15, /* PME status */
Rwcsr= 0x40, /* wake on lan control/status */
Rpcr= 0x44, /* pause control/status */
Rrfcr= 0x48, /* receive filter/match control */
Rfen= 1<<31, /* receive filter enable */
Aab= 1<<30, /* accept all broadcast */
Aam= 1<<29, /* accept all multicast */
Aau= 1<<28, /* accept all unicast */
Apm= 1<<27, /* accept on perfect match */
Apat= 0xF<<23,/* accept on pattern match */
Aarp= 1<<22, /* accept ARP */
Mhen= 1<<21, /* multicast hash enable */
Uhen= 1<<20, /* unicast hash enable */
Ulm= 1<<19, /* U/L bit mask */
/* bits 0-9 are rfaddr */
Rrfdr= 0x4C, /* receive filter/match data */
Rbrar= 0x50, /* boot rom address */
Rbrdr= 0x54, /* boot rom data */
Rsrr= 0x58, /* silicon revision */
Rmibc= 0x5C, /* MIB control */
/* 60-78 MIB data */
/* PHY registers */
Rbmcr= 0x80, /* basic mode configuration */
Reset= 1<<15,
Sel100= 1<<13, /* select 100Mb/sec if no auto neg */
Anena= 1<<12, /* auto negotiation enable */
Anrestart= 1<<9, /* restart auto negotiation */
Selfdx= 1<<8, /* select full duplex if no auto neg */
Rbmsr= 0x84, /* basic mode status */
Ancomp= 1<<5, /* autonegotiation complete */
Rphyidr1= 0x88,
Rphyidr2= 0x8C,
Ranar= 0x90, /* autonegotiation advertisement */
Ranlpar= 0x94, /* autonegotiation link partner ability */
Raner= 0x98, /* autonegotiation expansion */
Rannptr= 0x9C, /* autonegotiation next page TX */
Rphysts= 0xC0, /* PHY status */
Rmicr= 0xC4, /* MII control */
Inten= 1<<1, /* PHY interrupt enable */
Rmisr= 0xC8, /* MII status */
Rfcscr= 0xD0, /* false carrier sense counter */
Rrecr= 0xD4, /* receive error counter */
Rpcsr= 0xD8, /* 100Mb config/status */
Rphycr= 0xE4, /* PHY control */
Rtbscr= 0xE8, /* 10BaseT status/control */
};
/*
* eeprom addresses
* 7 to 9 (16 bit words): mac address, shifted and reversed
*/
#define csr32r(c, r) (inl((c)->port+(r)))
#define csr32w(c, r, l) (outl((c)->port+(r), (ulong)(l)))
#define csr16r(c, r) (ins((c)->port+(r)))
#define csr16w(c, r, l) (outs((c)->port+(r), (ulong)(l)))
static void
dumpcregs(Ctlr *ctlr)
{
int i;
for(i=0; i<=0x5C; i+=4)
print("%2.2ux %8.8lux\n", i, csr32r(ctlr, i));
}
static void
promiscuous(void* arg, int on)
{
Ctlr *ctlr;
ulong w;
ctlr = ((Ether*)arg)->ctlr;
ilock(&ctlr->lock);
w = csr32r(ctlr, Rrfcr);
if(on != ((w&Aau)!=0)){
csr32w(ctlr, Rrfcr, w & ~Rfen);
csr32w(ctlr, Rrfcr, Rfen | (w ^ Aau));
}
iunlock(&ctlr->lock);
}
static void
attach(Ether* ether)
{
Ctlr *ctlr;
ctlr = ether->ctlr;
ilock(&ctlr->lock);
if(0)
dumpcregs(ctlr);
csr32w(ctlr, Rcr, Rxe);
iunlock(&ctlr->lock);
}
static long
ifstat(Ether* ether, void* a, long n, ulong offset)
{
Ctlr *ctlr;
char *buf, *p;
int i, l, len;
ctlr = ether->ctlr;
ether->crcs = ctlr->crce;
ether->frames = ctlr->runt+ctlr->ise+ctlr->rlong+ctlr->fae;
ether->buffs = ctlr->rxorn+ctlr->tfu;
ether->overflows = ctlr->rxsovr;
if(n == 0)
return 0;
p = malloc(READSTR);
l = snprint(p, READSTR, "Rxa: %lud\n", ctlr->rxa);
l += snprint(p+l, READSTR-l, "Rxo: %lud\n", ctlr->rxo);
l += snprint(p+l, READSTR-l, "Rlong: %lud\n", ctlr->rlong);
l += snprint(p+l, READSTR-l, "Runt: %lud\n", ctlr->runt);
l += snprint(p+l, READSTR-l, "Ise: %lud\n", ctlr->ise);
l += snprint(p+l, READSTR-l, "Fae: %lud\n", ctlr->fae);
l += snprint(p+l, READSTR-l, "Lbp: %lud\n", ctlr->lbp);
l += snprint(p+l, READSTR-l, "Tfu: %lud\n", ctlr->tfu);
l += snprint(p+l, READSTR-l, "Txa: %lud\n", ctlr->txa);
l += snprint(p+l, READSTR-l, "CRC Error: %lud\n", ctlr->crce);
l += snprint(p+l, READSTR-l, "Collision Seen: %lud\n", ctlr->col);
l += snprint(p+l, READSTR-l, "Frame Too Long: %lud\n", ctlr->rlong);
l += snprint(p+l, READSTR-l, "Runt Frame: %lud\n", ctlr->runt);
l += snprint(p+l, READSTR-l, "Rx Underflow Error: %lud\n", ctlr->rxorn);
l += snprint(p+l, READSTR-l, "Tx Underrun: %lud\n", ctlr->txurn);
l += snprint(p+l, READSTR-l, "Excessive Collisions: %lud\n", ctlr->ec);
l += snprint(p+l, READSTR-l, "Late Collision: %lud\n", ctlr->owc);
l += snprint(p+l, READSTR-l, "Loss of Carrier: %lud\n", ctlr->crs);
l += snprint(p+l, READSTR-l, "Parity: %lud\n", ctlr->dperr);
l += snprint(p+l, READSTR-l, "Aborts: %lud\n", ctlr->rmabt+ctlr->rtabt);
l += snprint(p+l, READSTR-l, "RX Status overrun: %lud\n", ctlr->rxsover);
snprint(p+l, READSTR-l, "ntqmax: %d\n", ctlr->ntqmax);
ctlr->ntqmax = 0;
buf = a;
len = readstr(offset, buf, n, p);
if(offset > l)
offset -= l;
else
offset = 0;
buf += len;
n -= len;
l = snprint(p, READSTR, "srom:");
for(i = 0; i < nelem(ctlr->srom); i++){
if(i && ((i & 0x0F) == 0))
l += snprint(p+l, READSTR-l, "\n ");
l += snprint(p+l, READSTR-l, " %4.4uX", ctlr->srom[i]);
}
snprint(p+l, READSTR-l, "\n");
len += readstr(offset, buf, n, p);
free(p);
return len;
}
static void
txstart(Ether* ether)
{
Ctlr *ctlr;
Block *bp;
Des *des;
int started;
ctlr = ether->ctlr;
started = 0;
while(ctlr->ntq < ctlr->ntdr-1){
bp = qget(ether->oq);
if(bp == nil)
break;
des = &ctlr->tdr[ctlr->tdrh];
des->bp = bp;
des->addr = PADDR(bp->rp);
ctlr->ntq++;
coherence();
des->cmdsts = Own | BLEN(bp);
ctlr->tdrh = NEXT(ctlr->tdrh, ctlr->ntdr);
started = 1;
}
if(started){
coherence();
csr32w(ctlr, Rcr, Txe); /* prompt */
}
if(ctlr->ntq > ctlr->ntqmax)
ctlr->ntqmax = ctlr->ntq;
}
static void
transmit(Ether* ether)
{
Ctlr *ctlr;
ctlr = ether->ctlr;
ilock(&ctlr->tlock);
txstart(ether);
iunlock(&ctlr->tlock);
}
static void
txrxcfg(Ctlr *ctlr, int txdrth)
{
ulong rx, tx;
rx = csr32r(ctlr, Rrxcfg);
tx = csr32r(ctlr, Rtxcfg);
if(ctlr->fd){
rx |= Atx;
tx |= Csi | Hbi;
}else{
rx &= ~Atx;
tx &= ~(Csi | Hbi);
}
tx &= ~(Mxdma|Drth|Flth);
tx |= Mxdma64 | Flth128 | txdrth;
csr32w(ctlr, Rtxcfg, tx);
rx &= ~(Mxdma|Rdrth);
rx |= Mxdma64 | Rdrth64;
csr32w(ctlr, Rrxcfg, rx);
}
static void
interrupt(Ureg*, void* arg)
{
int len, status, cmdsts, n;
Ctlr *ctlr;
Ether *ether;
Des *des;
Block *bp;
ether = arg;
ctlr = ether->ctlr;
while((status = csr32r(ctlr, Risr)) != 0){
status &= ~(Pme|Mib);
if(status & Hiberr){
if(status & Rxsovr)
ctlr->rxsover++;
if(status & Sserr)
ctlr->sserr++;
if(status & Dperr)
ctlr->dperr++;
if(status & Rmabt)
ctlr->rmabt++;
if(status & Rtabt)
ctlr->rtabt++;
status &= ~(Hiberr|Txrcmp|Rxrcmp|Rxsovr|Dperr|Sserr|Rmabt|Rtabt);
}
/* update link state */
if(status&Phy){
status &= ~Phy;
csr32r(ctlr, Rcfg);
n = csr32r(ctlr, Rcfg);
// iprint("83815 phy %x %x\n", n, n&Lnksts);
ether->link = (n&Lnksts) != 0;
}
/*
* Received packets.
*/
if(status & (Rxdesc|Rxok|Rxerr|Rxearly|Rxorn)){
des = &ctlr->rdr[ctlr->rdrx];
while((cmdsts = des->cmdsts) & Own){
if((cmdsts&Ok) == 0){
if(cmdsts & Rxa)
ctlr->rxa++;
if(cmdsts & Rxo)
ctlr->rxo++;
if(cmdsts & Long)
ctlr->rlong++;
if(cmdsts & Runt)
ctlr->runt++;
if(cmdsts & Ise)
ctlr->ise++;
if(cmdsts & Crce)
ctlr->crce++;
if(cmdsts & Fae)
ctlr->fae++;
if(cmdsts & Lbp)
ctlr->lbp++;
if(cmdsts & Col)
ctlr->col++;
}
else if(bp = iallocb(Rbsz)){
len = (cmdsts&Size)-4;
if(len <= 0){
debug("ns83815: packet len %d <=0\n", len);
freeb(des->bp);
}else{
des->bp->wp = des->bp->rp+len;
etheriq(ether, des->bp, 1);
}
des->bp = bp;
des->addr = PADDR(bp->rp);
coherence();
}else{
debug("ns83815: interrupt: iallocb for input buffer failed\n");
des->bp->next = 0;
}
des->cmdsts = Rbsz;
coherence();
ctlr->rdrx = NEXT(ctlr->rdrx, ctlr->nrdr);
des = &ctlr->rdr[ctlr->rdrx];
}
status &= ~(Rxdesc|Rxok|Rxerr|Rxearly|Rxorn);
}
/*
* Check the transmit side:
* check for Transmit Underflow and Adjust
* the threshold upwards;
* free any transmitted buffers and try to
* top-up the ring.
*/
if(status & Txurn){
ctlr->txurn++;
ilock(&ctlr->lock);
/* change threshold */
iunlock(&ctlr->lock);
status &= ~(Txurn);
}
ilock(&ctlr->tlock);
while(ctlr->ntq){
des = &ctlr->tdr[ctlr->tdri];
cmdsts = des->cmdsts;
if(cmdsts & Own)
break;
if((cmdsts & Ok) == 0){
if(cmdsts & Txa)
ctlr->txa++;
if(cmdsts & Tfu)
ctlr->tfu++;
if(cmdsts & Td)
ctlr->td++;
if(cmdsts & Ed)
ctlr->ed++;
if(cmdsts & Owc)
ctlr->owc++;
if(cmdsts & Ec)
ctlr->ec++;
ether->oerrs++;
}
freeb(des->bp);
des->bp = nil;
des->cmdsts = 0;
ctlr->ntq--;
ctlr->tdri = NEXT(ctlr->tdri, ctlr->ntdr);
}
txstart(ether);
iunlock(&ctlr->tlock);
status &= ~(Txurn|Txidle|Txerr|Txdesc|Txok);
/*
* Anything left not catered for?
*/
if(status)
print("#l%d: status %8.8uX\n", ether->ctlrno, status);
}
}
static void
ctlrinit(Ether* ether)
{
Ctlr *ctlr;
Des *des, *last;
ctlr = ether->ctlr;
/*
* Allocate suitable aligned descriptors
* for the transmit and receive rings;
* initialise the receive ring;
* initialise the transmit ring;
* unmask interrupts and start the transmit side.
*/
des = xspanalloc((ctlr->nrdr+ctlr->ntdr)*sizeof(Des), 32, 0);
ctlr->tdr = des;
ctlr->rdr = des+ctlr->ntdr;
last = nil;
for(des = ctlr->rdr; des < &ctlr->rdr[ctlr->nrdr]; des++){
des->bp = iallocb(Rbsz);
if(des->bp == nil)
error(Enomem);
des->cmdsts = Rbsz;
des->addr = PADDR(des->bp->rp);
if(last != nil)
last->next = PADDR(des);
last = des;
}
ctlr->rdr[ctlr->nrdr-1].next = PADDR(ctlr->rdr);
ctlr->rdrx = 0;
csr32w(ctlr, Rrxdp, PADDR(ctlr->rdr));
last = nil;
for(des = ctlr->tdr; des < &ctlr->tdr[ctlr->ntdr]; des++){
des->cmdsts = 0;
des->bp = nil;
des->addr = ~0;
if(last != nil)
last->next = PADDR(des);
last = des;
}
ctlr->tdr[ctlr->ntdr-1].next = PADDR(ctlr->tdr);
ctlr->tdrh = 0;
ctlr->tdri = 0;
csr32w(ctlr, Rtxdp, PADDR(ctlr->tdr));
txrxcfg(ctlr, Drth512);
csr32w(ctlr, Rimr, Dperr|Sserr|Rmabt|Rtabt|Rxsovr|Hiberr|Txurn|Txerr|
Txdesc|Txok|Rxorn|Rxerr|Rxdesc|Rxok); /* Phy|Pme|Mib */
csr32w(ctlr, Rmicr, Inten); /* enable phy interrupts */
csr32r(ctlr, Risr); /* clear status */
csr32w(ctlr, Rier, Ie);
}
static void
eeclk(Ctlr *ctlr, int clk)
{
csr32w(ctlr, Rmear, Eesel | clk);
microdelay(2);
}
static void
eeidle(Ctlr *ctlr)
{
int i;
eeclk(ctlr, 0);
eeclk(ctlr, Eeclk);
for(i=0; i<25; i++){
eeclk(ctlr, 0);
eeclk(ctlr, Eeclk);
}
eeclk(ctlr, 0);
csr32w(ctlr, Rmear, 0);
microdelay(2);
}
static int
eegetw(Ctlr *ctlr, int a)
{
int d, i, w, v;
eeidle(ctlr);
eeclk(ctlr, 0);
eeclk(ctlr, Eeclk);
d = 0x180 | a;
for(i=0x400; i; i>>=1){
v = (d & i) ? Eedi : 0;
eeclk(ctlr, v);
eeclk(ctlr, Eeclk|v);
}
eeclk(ctlr, 0);
w = 0;
for(i=0x8000; i; i >>= 1){
eeclk(ctlr, Eeclk);
if(csr32r(ctlr, Rmear) & Eedo)
w |= i;
microdelay(2);
eeclk(ctlr, 0);
}
eeidle(ctlr);
return w;
}
static void
resetctlr(Ctlr *ctlr)
{
int i;
csr32w(ctlr, Rcr, Rst);
for(i=0;; i++){
if(i > 100)
panic("ns83815: soft reset did not complete");
microdelay(250);
if((csr32r(ctlr, Rcr) & Rst) == 0)
break;
delay(1);
}
}
static void
shutdown(Ether* ether)
{
Ctlr *ctlr = ether->ctlr;
print("ether83815 shutting down\n");
csr32w(ctlr, Rcr, Rxd|Txd); /* disable transceiver */
resetctlr(ctlr);
}
static void
softreset(Ctlr* ctlr, int resetphys)
{
int i, w;
/*
* Soft-reset the controller
*/
resetctlr(ctlr);
csr32w(ctlr, Rccsr, Pmests);
csr32w(ctlr, Rccsr, 0);
csr32w(ctlr, Rcfg, csr32r(ctlr, Rcfg) | Pint_acen);
if(resetphys){
/*
* Soft-reset the PHY
*/
csr32w(ctlr, Rbmcr, Reset);
for(i=0;; i++){
if(i > 100)
panic("ns83815: PHY soft reset time out");
if((csr32r(ctlr, Rbmcr) & Reset) == 0)
break;
delay(1);
}
}
/*
* Initialisation values, in sequence (see 4.4 Recommended Registers Configuration)
*/
csr16w(ctlr, 0xCC, 0x0001); /* PGSEL */
csr16w(ctlr, 0xE4, 0x189C); /* PMCCSR */
csr16w(ctlr, 0xFC, 0x0000); /* TSTDAT */
csr16w(ctlr, 0xF4, 0x5040); /* DSPCFG */
csr16w(ctlr, 0xF8, 0x008C); /* SDCFG */
/*
* Auto negotiate
*/
w = csr16r(ctlr, Rbmsr); /* clear latched bits */
debug("anar: %4.4ux\n", csr16r(ctlr, Ranar));
csr16w(ctlr, Rbmcr, Anena);
if(csr16r(ctlr, Ranar) == 0 || (csr32r(ctlr, Rcfg) & Aneg_dn) == 0){
csr16w(ctlr, Rbmcr, Anena|Anrestart);
for(i=0;; i++){
if(i > 3000){
print("ns83815: auto neg timed out\n");
break;
}
if((w = csr16r(ctlr, Rbmsr)) & Ancomp)
break;
delay(1);
}
debug("%d ms\n", i);
w &= 0xFFFF;
debug("bmsr: %4.4ux\n", w);
}
USED(w);
debug("anar: %4.4ux\n", csr16r(ctlr, Ranar));
debug("anlpar: %4.4ux\n", csr16r(ctlr, Ranlpar));
debug("aner: %4.4ux\n", csr16r(ctlr, Raner));
debug("physts: %4.4ux\n", csr16r(ctlr, Rphysts));
debug("tbscr: %4.4ux\n", csr16r(ctlr, Rtbscr));
}
static int
media(Ether* ether)
{
Ctlr* ctlr;
ulong cfg;
ctlr = ether->ctlr;
cfg = csr32r(ctlr, Rcfg);
ctlr->fd = (cfg & Fdup) != 0;
ether->link = (cfg&Lnksts) != 0;
return (cfg&(Lnksts|Speed100)) == Lnksts? 10: 100;
}
static char* mediatable[9] = {
"10BASE-T", /* TP */
"10BASE-2", /* BNC */
"10BASE-5", /* AUI */
"100BASE-TX",
"10BASE-TFD",
"100BASE-TXFD",
"100BASE-T4",
"100BASE-FX",
"100BASE-FXFD",
};
static int
is630(ulong id, Pcidev *p)
{
if(id == SiS900)
switch (p->rid) {
case SiSrev630s:
case SiSrev630e:
case SiSrev630ea1:
return 1;
}
return 0;
}
enum {
MagicReg = 0x48,
MagicRegSz = 1,
Magicrden = 0x40, /* read enable, apparently */
Paddr= 0x70, /* address port */
Pdata= 0x71, /* data port */
};
/* rcmos() originally from LANL's SiS 900 driver's rcmos() */
static int
sisrdcmos(Ctlr *ctlr)
{
int i;
unsigned reg;
ulong port;
Pcidev *p;
debug("ns83815: SiS 630 rev. %ux reading mac address from cmos\n", ctlr->pcidev->rid);
p = pcimatch(nil, SiS, SiS630bridge);
if(p == nil) {
print("ns83815: no SiS 630 rev. %ux bridge for mac addr\n",
ctlr->pcidev->rid);
return 0;
}
port = p->mem[0].bar & ~0x01;
debug("ns83815: SiS 630 rev. %ux reading mac addr from cmos via bridge at port 0x%lux\n", ctlr->pcidev->rid, port);
reg = pcicfgr8(p, MagicReg);
pcicfgw8(p, MagicReg, reg|Magicrden);
for (i = 0; i < Eaddrlen; i++) {
outb(port+Paddr, SiS630eenodeaddr + i);
ctlr->sromea[i] = inb(port+Pdata);
}
pcicfgw8(p, MagicReg, reg & ~Magicrden);
return 1;
}
/*
* If this is a SiS 630E chipset with an embedded SiS 900 controller,
* we have to read the MAC address from the APC CMOS RAM. - sez freebsd.
* However, CMOS *is* NVRAM normally. See devrtc.c:440, memory.c:88.
*/
static void
sissrom(Ctlr *ctlr)
{
union {
uchar eaddr[Eaddrlen];
ushort alignment;
} ee;
int i, off = SiSeenodeaddr, cnt = sizeof ee.eaddr / sizeof(short);
ushort *shp = (ushort *)ee.eaddr;
if(!is630(ctlr->id, ctlr->pcidev) || !sisrdcmos(ctlr)) {
for (i = 0; i < cnt; i++)
*shp++ = eegetw(ctlr, off++);
memmove(ctlr->sromea, ee.eaddr, sizeof ctlr->sromea);
}
}
static void
nssrom(Ctlr* ctlr)
{
int i, j;
for(i = 0; i < nelem(ctlr->srom); i++)
ctlr->srom[i] = eegetw(ctlr, i);
/*
* the MAC address is reversed, straddling word boundaries
*/
j = Nseenodeaddr*16 + 15;
for(i=0; i<48; i++){
ctlr->sromea[i>>3] |= ((ctlr->srom[j>>4] >> (15-(j&0xF))) & 1) << (i&7);
j++;
}
}
static void
srom(Ctlr* ctlr)
{
memset(ctlr->sromea, 0, sizeof(ctlr->sromea));
switch (ctlr->id) {
case SiS900:
case SiS7016:
sissrom(ctlr);
break;
case Nat83815:
nssrom(ctlr);
break;
default:
print("ns83815: srom: unknown id 0x%ux\n", ctlr->id);
break;
}
}
static void
scanpci83815(void)
{
Ctlr *ctlr;
Pcidev *p;
ulong id;
p = nil;
while(p = pcimatch(p, 0, 0)){
if(p->ccrb != Pcibcnet || p->ccru != 0)
continue;
id = (p->did<<16)|p->vid;
switch(id){
default:
continue;
case Nat83815:
break;
case SiS900:
break;
}
/*
* bar[0] is the I/O port register address and
* bar[1] is the memory-mapped register address.
*/
ctlr = malloc(sizeof(Ctlr));
ctlr->port = p->mem[0].bar & ~0x01;
ctlr->pcidev = p;
ctlr->id = id;
if(ioalloc(ctlr->port, p->mem[0].size, 0, "ns83815") < 0){
print("ns83815: port 0x%uX in use\n", ctlr->port);
free(ctlr);
continue;
}
softreset(ctlr, 0);
srom(ctlr);
if(ctlrhead != nil)
ctlrtail->next = ctlr;
else
ctlrhead = ctlr;
ctlrtail = ctlr;
}
}
/* multicast already on, don't need to do anything */
static void
multicast(void*, uchar*, int)
{
}
static int
reset(Ether* ether)
{
Ctlr *ctlr;
int i, x;
ulong ctladdr;
uchar ea[Eaddrlen];
static int scandone;
if(scandone == 0){
scanpci83815();
scandone = 1;
}
/*
* Any adapter matches if no ether->port is supplied,
* otherwise the ports must match.
*/
for(ctlr = ctlrhead; ctlr != nil; ctlr = ctlr->next){
if(ctlr->active)
continue;
if(ether->port == 0 || ether->port == ctlr->port){
ctlr->active = 1;
break;
}
}
if(ctlr == nil)
return -1;
ether->ctlr = ctlr;
ether->port = ctlr->port;
ether->irq = ctlr->pcidev->intl;
ether->tbdf = ctlr->pcidev->tbdf;
/*
* 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 the hardware.
*/
memset(ea, 0, Eaddrlen);
if(memcmp(ea, ether->ea, Eaddrlen) == 0)
memmove(ether->ea, ctlr->sromea, Eaddrlen);
for(i=0; i<Eaddrlen; i+=2){
x = ether->ea[i] | (ether->ea[i+1]<<8);
ctladdr = (ctlr->id == Nat83815? i: i<<15);
csr32w(ctlr, Rrfcr, ctladdr);
csr32w(ctlr, Rrfdr, x);
}
csr32w(ctlr, Rrfcr, Rfen|Apm|Aab|Aam);
ether->mbps = media(ether);
/*
* Look for a medium override in case there's no autonegotiation
* the autonegotiation fails.
*/
for(i = 0; i < ether->nopt; i++){
if(cistrcmp(ether->opt[i], "FD") == 0){
ctlr->fd = 1;
continue;
}
for(x = 0; x < nelem(mediatable); x++){
debug("compare <%s> <%s>\n", mediatable[x],
ether->opt[i]);
if(cistrcmp(mediatable[x], ether->opt[i]) == 0){
if(x != 4 && x >= 3)
ether->mbps = 100;
else
ether->mbps = 10;
switch(x){
default:
ctlr->fd = 0;
break;
case 0x04: /* 10BASE-TFD */
case 0x05: /* 100BASE-TXFD */
case 0x08: /* 100BASE-FXFD */
ctlr->fd = 1;
break;
}
break;
}
}
}
/*
* Initialise descriptor rings, ethernet address.
*/
ctlr->nrdr = Nrde;
ctlr->ntdr = Ntde;
pcisetbme(ctlr->pcidev);
ctlrinit(ether);
/*
* Linkage to the generic ethernet driver.
*/
ether->attach = attach;
ether->transmit = transmit;
ether->interrupt = interrupt;
ether->ifstat = ifstat;
ether->arg = ether;
ether->promiscuous = promiscuous;
ether->multicast = multicast;
ether->shutdown = shutdown;
return 0;
}
void
ether83815link(void)
{
addethercard("83815", reset);
}