ref: dd16eef8365cb0b9e4805c23291aadcaa596dd87
dir: /os/boot/puma/ether8900.c/
/*
* Crystal CS8900 ethernet controller
* Specifically for the Teralogic Puma architecture
*/
#include "u.h"
#include "lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "ether.h"
#include "puma.h"
/*
* On the Puma board the CS8900 can be addressed from either
* ISA I/O space or ISA memory space at the following locations.
* The cs8900 address pins are shifted by 1 relative to the CPU.
*/
enum {
IsaIOBase = 0xf0000000,
IsaMemBase = 0xe0000000,
IOBase = 0x300,
MemBase = 0xc0000,
};
/* I/O accesses */
#define out16(port, val) (*((ushort *)IsaIOBase + IOBase + (port)) = (val))
#define in16(port) *((ushort *)IsaIOBase + IOBase + (port))
#define in8(port) *((uchar *)IsaIOBase + ((IOBase+(port))<<1))
#define regIOw(reg, val) do {out16(PpPtr, (reg)|0x3000); out16(PpData, val);} while(0)
#define regIOr(reg) (out16(PpPtr, (reg)|0x3000), in16(PpData))
#define regIOr1(reg) (out16(PpPtr, (reg)|0x3000), in16(PpData1))
/* Memory accesses */
#define regw(reg, val) *((ushort *)IsaMemBase + MemBase + (reg)) = (val)
#define regr(reg) *((ushort *)IsaMemBase + MemBase + (reg))
/* Puma frame copying */
#define copyout(src, len) { \
int _len = (len); \
ushort *_src = (ushort *)(src); \
ushort *_dst = (ushort *)IsaMemBase + MemBase + TxFrame; \
while(_len > 0) { \
*_dst++ = *_src++; \
_dst++; \
_len -= 2; \
} \
}
#define copyoutIO(src, len) { \
int _len = (len); \
ushort *_src = (ushort *)(src); \
while(_len > 0) { \
out16(RxTxData, *_src); \
_src++; \
_len -= 2; \
} \
}
#define copyin(dst, len) { \
int _len = (len), _len2 = (len)&~1; \
ushort *_src = (ushort *)IsaMemBase + MemBase + RxFrame; \
ushort *_dst = (ushort *)(dst); \
while(_len2 > 0) { \
*_dst++ = *_src++; \
_src++; \
_len2 -= 2; \
} \
if(_len&1) \
*(uchar*)_dst = (*_src)&0xff; \
}
#define copyinIO(dst, len) { \
int _i, _len = (len), _len2 = (len)&~1; \
ushort *_dst = (ushort *)(dst); \
_i = in16(RxTxData); USED(_i); /* RxStatus */ \
_i = in16(RxTxData); USED(_i); /* RxLen */ \
while(_len2 > 0) { \
*_dst++ = in16(RxTxData); \
_len2 -= 2; \
} \
if(_len&1) \
*(uchar*)_dst = (in16(RxTxData))&0xff; \
}
enum { /* I/O Mode Register Offsets */
RxTxData = 0x00, /* receive/transmit data - port 0 */
TxCmdIO = 0x04, /* transmit command */
TxLenIO = 0x06, /* transmit length */
IsqIO = 0x08, /* Interrupt status queue */
PpPtr = 0x0a, /* packet page pointer */
PpData = 0x0c, /* packet page data */
PpData1 = 0x0e, /* packet page data - port 1*/
};
enum { /* Memory Mode Register Offsets */
/* Bus Interface Registers */
Ern = 0x0000, /* EISA registration numberion */
Pic = 0x0002, /* Product identification code */
Iob = 0x0020, /* I/O base address */
Intr = 0x0022, /* interrupt number */
Mba = 0x002c, /* memory base address */
Ecr = 0x0040, /* EEPROM command register */
Edw = 0x0042, /* EEPROM data word */
Rbc = 0x0050, /* receive frame byte counter */
/* Status and Control Registers */
RxCfg = 0x0102,
RxCtl = 0x0104,
TxCfg = 0x0106,
BufCfg = 0x010a,
LineCtl = 0x0112,
SelfCtl = 0x0114,
BusCtl = 0x0116,
TestCtl = 0x0118,
Isq = 0x0120,
RxEvent = 0x0124,
TxEvent = 0x0128,
BufEvent = 0x012c,
RxMISS = 0x0130,
TxCol = 0x0132,
LineSt = 0x0134,
SelfSt = 0x0136,
BusSt = 0x0138,
Tdr = 0x013c,
/* Initiate Transmit Registers */
TxCmd = 0x0144, /* transmit command */
TxLen = 0x0146, /* transmit length */
/* Address Filter Registers */
IndAddr = 0x0158, /* individual address registers */
/* Frame Location */
RxStatus = 0x0400, /* receive status */
RxLen = 0x0402, /* receive length */
RxFrame = 0x0404, /* receive frame location */
TxFrame = 0x0a00, /* transmit frame location */
};
enum { /* Ecr */
Addr = 0x00ff, /* EEPROM word address (field) */
Opcode = 0x0300, /* command opcode (field) */
};
enum { /* Isq */
Regnum = 0x003f, /* register number held by Isq (field) */
IsqRxEvent = 0x04,
IsqTxEvent = 0x08,
IsqBufEvent = 0x0c,
IsqRxMiss = 0x10,
IsqTxCol = 0x12,
RegContent = 0xffc0, /* register data contents (field) */
};
enum { /* RxCfg */
Skip_1 = 0x0040,
StreamE = 0x0080,
RxOKiE = 0x0100,
RxDMAonly = 0x0200,
AutoRxDMAE = 0x0400,
BufferCRC = 0x0800,
CRCerroriE = 0x1000,
RuntiE = 0x2000,
ExtradataiE = 0x4000,
};
enum { /* RxEvent */
IAHash = 0x0040,
Dribblebits = 0x0080,
RxOK = 0x0100,
Hashed = 0x0200,
IndividualAdr = 0x0400,
Broadcast = 0x0800,
CRCerror = 0x1000,
Runt = 0x2000,
Extradata = 0x4000,
};
enum { /* RxCtl */
IAHashA = 0x0040,
PromiscuousA = 0x0080,
RxOKA = 0x0100,
MulticastA = 0x0200,
IndividualA = 0x0400,
BroadcastA = 0x0800,
CRCerrorA = 0x1000,
RuntA = 0x2000,
ExtradataA = 0x4000,
};
enum { /* TxCfg */
LossofCRSiE = 0x0040,
SQEerroriE = 0x0080,
TxOKiE = 0x0100,
OutofWindowiE = 0x0200,
JabberiE = 0x0400,
AnycolliE = 0x0800,
Coll16iE = 0x8000,
};
enum { /* TxEvent */
LossofCRS = 0x0040,
SQEerror = 0x0080,
TxOK = 0x0100,
OutofWindow = 0x0200,
Jabber = 0x0400,
NTxCols = 0x7800, /* number of Tx collisions (field) */
coll16 = 0x8000,
};
enum { /* BufCfg */
SWintX = 0x0040,
RxDMAiE = 0x0080,
Rdy4TxiE = 0x0100,
TxUnderruniE = 0x0200,
RxMissiE = 0x0400,
Rx128iE = 0x0800,
TxColOvfiE = 0x1000,
MissOvfloiE = 0x2000,
RxDestiE = 0x8000,
};
enum { /* BufEvent */
SWint = 0x0040,
RxDMAFrame = 0x0080,
Rdy4Tx = 0x0100,
TxUnderrun = 0x0200,
RxMiss = 0x0400,
Rx128 = 0x0800,
RxDest = 0x8000,
};
enum { /* RxMiss */
MissCount = 0xffc0,
};
enum { /* TxCol */
ColCount = 0xffc0,
};
enum { /* LineCtl */
SerRxOn = 0x0040,
SerTxOn = 0x0080,
Iface = 0x0300, /* (field) 01 - AUI, 00 - 10BASE-T, 10 - Auto select */
ModBackoffE = 0x0800,
PolarityDis = 0x1000,
DefDis = 0x2000,
LoRxSquelch = 0x4000,
};
enum { /* LineSt */
LinkOK = 0x0080,
AUI = 0x0100,
TenBT = 0x0200,
PolarityOK = 0x1000,
CRS = 0x4000,
};
enum { /* SelfCtl */
RESET = 0x0040,
SWSuspend = 0x0100,
HWSleepE = 0x0200,
HWStandbyE = 0x0400,
};
enum { /* SelfSt */
INITD = 0x0080,
SIBUSY = 0x0100,
EepromPresent = 0x0200,
EepromOK = 0x0400,
ElPresent = 0x0800,
EeSize = 0x1000,
};
enum { /* BusCtl */
ResetRxDMA = 0x0040,
UseSA = 0x0200,
MemoryE = 0x0400,
DMABurst = 0x0800,
EnableIRQ = 0x8000,
};
enum { /* BusST */
TxBidErr = 0x0080,
Rdy4TxNOW = 0x0100,
};
enum { /* TestCtl */
FDX = 0x4000, /* full duplex */
};
enum { /* TxCmd */
TxStart = 0x00c0, /* bytes before transmit starts (field) */
TxSt5 = 0x0000, /* start after 5 bytes */
TxSt381 = 0x0040, /* start after 381 bytes */
TxSt1021 = 0x0080, /* start after 1021 bytes */
TxStAll = 0x00c0, /* start after the entire frame is in the cs8900 */
Force = 0x0100,
Onecoll = 0x0200,
InhibitCRC = 0x1000,
TxPadDis = 0x2000,
};
static Queue *pendingTx[MaxEther];
static void
attach(Ctlr *ctlr)
{
int reg;
USED(ctlr);
/* enable transmit and receive */
reg = regr(BusCtl);
regw(BusCtl, reg|EnableIRQ);
reg = regr(LineCtl);
regw(LineCtl, reg|SerRxOn|SerTxOn);
}
static char pbuf[200];
int
sprintx(void *f, char *to, int count)
{
int i, printable;
char *start = to;
uchar *from = f;
if(count < 0) {
print("BAD DATA COUNT %d\n", count);
return 0;
}
printable = 1;
if(count > 40)
count = 40;
for(i=0; i<count && printable; i++)
if((from[i]<32 && from[i] !='\n' && from[i] !='\r' && from[i] !='\b' && from[i] !='\t') || from[i]>127)
printable = 0;
*to++ = '\'';
if(printable){
memmove(to, from, count);
to += count;
}else{
for(i=0; i<count; i++){
if(i>0 && i%4==0)
*to++ = ' ';
sprint(to, "%2.2ux", from[i]);
to += 2;
}
}
*to++ = '\'';
*to = 0;
return to - start;
}
static void
transmit(Ctlr *ctlr)
{
int len, status;
Block *b;
for(;;){
/* is TxCmd pending ? - check */
if(qlen(pendingTx[ctlr->ctlrno]) > 0)
break;
b = qget(ctlr->oq);
if(b == 0)
break;
len = BLEN(b);
regw(TxCmd, TxSt381);
regw(TxLen, len);
status = regr(BusSt);
if((status & Rdy4TxNOW) == 0) {
qbwrite(pendingTx[ctlr->ctlrno], b);
break;
}
/*
* Copy the packet to the transmit buffer.
*/
copyout(b->rp, len);
freeb(b);
}
}
static void
interrupt(Ureg*, Ctlr *ctlr)
{
int len, events, status;
Block *b;
Queue *q;
while((events = regr(Isq)) != 0) {
status = events&RegContent;
switch(events&Regnum) {
case IsqBufEvent:
if(status&Rdy4Tx) {
if(qlen(pendingTx[ctlr->ctlrno]) > 0)
q = pendingTx[ctlr->ctlrno];
else
q = ctlr->oq;
b = qget(q);
if(b == 0)
break;
len = BLEN(b);
copyout(b->rp, len);
freeb(b);
} else
if(status&TxUnderrun) {
print("TxUnderrun\n");
} else
if(status&RxMiss) {
print("RxMiss\n");
} else {
print("IsqBufEvent status = %ux\n", status);
}
break;
case IsqRxEvent:
if(status&RxOK) {
len = regr(RxLen);
if((b = iallocb(len)) != 0) {
copyin(b->wp, len);
b->wp += len;
etheriq(ctlr, b, 1);
}
} else {
print("IsqRxEvent status = %ux\n", status);
}
break;
case IsqTxEvent:
if(status&TxOK) {
if(qlen(pendingTx[ctlr->ctlrno]) > 0)
q = pendingTx[ctlr->ctlrno];
else
q = ctlr->oq;
b = qget(q);
if(b == 0)
break;
len = BLEN(b);
regw(TxCmd, TxSt381);
regw(TxLen, len);
if((regr(BusSt) & Rdy4TxNOW) == 0) {
print("IsqTxEvent and Rdy4TxNow == 0\n");
}
copyout(b->rp, len);
freeb(b);
} else {
print("IsqTxEvent status = %ux\n", status);
}
break;
case IsqRxMiss:
break;
case IsqTxCol:
break;
}
}
}
int
cs8900reset(Ctlr* ctlr)
{
int i, reg;
uchar ea[Eaddrlen];
ctlr->card.irq = V_ETHERNET;
pendingTx[ctlr->ctlrno] = qopen(16*1024, 1, 0, 0);
/*
* If the Ethernet address is not set in the plan9.ini file
* a) try reading from the Puma board ROM. The ether address is found in
* bytes 4-9 of the ROM. The Teralogic Organizational Unique Id (OUI)
* is in bytes 4-6 and should be 00 10 8a.
*/
memset(ea, 0, Eaddrlen);
if(memcmp(ea, ctlr->card.ea, Eaddrlen) == 0) {
uchar *rom = (uchar *)EPROM_BASE;
if(rom[4] != 0x00 || rom[5] != 0x10 || rom[6] != 0x8a)
panic("no ether address");
memmove(ea, &rom[4], Eaddrlen);
}
memmove(ctlr->card.ea, ea, Eaddrlen);
/*
* Identify the chip by reading the Pic register.
* The EISA registration number is in the low word
* and the product identification code in the high code.
* The ERN for Crystal Semiconductor is 0x630e.
* Bits 0-7 and 13-15 of the Pic should be zero for a CS8900.
*/
if(regIOr(Ern) != 0x630e || (regIOr(Pic) & 0xe0ff) != 0)
panic("no cs8900 found");
/*
* Reset the chip and ensure 16-bit mode operation
*/
regIOw(SelfCtl, RESET);
delay(10);
i=in8(PpPtr); USED(i);
i=in8(PpPtr+1); USED(i);
i=in8(PpPtr); USED(i);
i=in8(PpPtr+1); USED(i);
/*
* Wait for initialisation and EEPROM reads to complete
*/
i=0;
for(;;) {
short st = regIOr(SelfSt);
if((st&SIBUSY) == 0 && st&INITD)
break;
if(i++ > 1000000)
panic("cs8900: initialisation failed");
}
/*
* Enable memory mode operation.
*/
regIOw(Mba, MemBase & 0xffff);
regIOw(Mba+2, MemBase >> 16);
regIOw(BusCtl, MemoryE|UseSA);
/*
* Enable 10BASE-T half duplex, transmit in interrupt mode
*/
reg = regr(LineCtl);
regw(LineCtl, reg&~Iface);
reg = regr(TestCtl);
regw(TestCtl, reg&~FDX);
regw(BufCfg, Rdy4TxiE|TxUnderruniE|RxMissiE);
regw(TxCfg, TxOKiE|JabberiE|Coll16iE);
regw(RxCfg, RxOKiE);
regw(RxCtl, RxOKA|IndividualA|BroadcastA);
for(i=0; i<Eaddrlen; i+=2)
regw(IndAddr+i, ea[i] | (ea[i+1] << 8));
/* Puma IRQ tied to INTRQ0 */
regw(Intr, 0);
ctlr->card.reset = cs8900reset;
ctlr->card.port = 0x300;
ctlr->card.attach = attach;
ctlr->card.transmit = transmit;
ctlr->card.intr = interrupt;
print("Ether reset...\n");uartwait();
return 0;
}