ref: d39d1a5303541539f61488317b220c1eb724d7d3
dir: /sys/src/cmd/nusb/ether/smsc.c/
/*
* SMSC LAN95XX
*/
#include <u.h>
#include <libc.h>
#include <thread.h>
#include "usb.h"
#include "dat.h"
enum {
Doburst = 1,
Resettime = 1000,
E2pbusytime = 1000,
Afcdefault = 0xF830A1,
// Hsburst = 37, /* from original linux driver */
Hsburst = 8,
Fsburst = 129,
Defbulkdly = 0x2000,
Ethp8021q = 0x8100,
MACoffset = 1,
PHYinternal = 1,
Rxerror = 0x8000,
Txfirst = 0x2000,
Txlast = 0x1000,
/* USB vendor requests */
Writereg = 0xA0,
Readreg = 0xA1,
/* device registers */
Intsts = 0x08,
Txcfg = 0x10,
Txon = 1<<2,
Hwcfg = 0x14,
Bir = 1<<12,
Rxdoff = 3<<9,
Mef = 1<<5,
Lrst = 1<<3,
Bce = 1<<1,
Pmctrl = 0x20,
Phyrst = 1<<4,
Ledgpio = 0x24,
Ledspd = 1<<24,
Ledlnk = 1<<20,
Ledfdx = 1<<16,
Afccfg = 0x2C,
E2pcmd = 0x30,
Busy = 1<<31,
Timeout = 1<<10,
Read = 0,
E2pdata = 0x34,
Burstcap = 0x38,
Intepctl = 0x68,
Phyint = 1<<15,
Bulkdelay = 0x6C,
Maccr = 0x100,
Mcpas = 1<<19,
Prms = 1<<18,
Hpfilt = 1<<13,
Txen = 1<<3,
Rxen = 1<<2,
Addrh = 0x104,
Addrl = 0x108,
Hashh = 0x10C,
Hashl = 0x110,
MIIaddr = 0x114,
MIIwrite= 1<<1,
MIIread = 0<<1,
MIIbusy = 1<<0,
MIIdata = 0x118,
Flow = 0x11C,
Vlan1 = 0x120,
Coecr = 0x130,
Txcoe = 1<<16,
Rxcoemd = 1<<1,
Rxcoe = 1<<0,
/* MII registers */
Bmcr = 0,
Bmcrreset= 1<<15,
Speed100= 1<<13,
Anenable= 1<<12,
Anrestart= 1<<9,
Fulldpx = 1<<8,
Bmsr = 1,
Advertise = 4,
Adcsma = 0x0001,
Ad10h = 0x0020,
Ad10f = 0x0040,
Ad100h = 0x0080,
Ad100f = 0x0100,
Adpause = 0x0400,
Adpauseasym= 0x0800,
Adall = Ad10h|Ad10f|Ad100h|Ad100f,
Phyintsrc = 29,
Phyintmask = 30,
Anegcomp= 1<<6,
Linkdown= 1<<4,
};
static int
wr(Dev *d, int reg, int val)
{
int ret;
ret = usbcmd(d, Rh2d|Rvendor|Rdev, Writereg, 0, reg,
(uchar*)&val, sizeof(val));
if(ret < 0)
fprint(2, "%s: wr(%x, %x): %r", argv0, reg, val);
return ret;
}
static int
rr(Dev *d, int reg)
{
int ret, rval;
ret = usbcmd(d, Rd2h|Rvendor|Rdev, Readreg, 0, reg,
(uchar*)&rval, sizeof(rval));
if(ret < 0){
fprint(2, "%s: rr(%x): %r", argv0, reg);
return 0;
}
return rval;
}
static int
miird(Dev *d, int idx)
{
while(rr(d, MIIaddr) & MIIbusy)
;
wr(d, MIIaddr, PHYinternal<<11 | idx<<6 | MIIread);
while(rr(d, MIIaddr) & MIIbusy)
;
return rr(d, MIIdata);
}
static void
miiwr(Dev *d, int idx, int val)
{
while(rr(d, MIIaddr) & MIIbusy)
;
wr(d, MIIdata, val);
wr(d, MIIaddr, PHYinternal<<11 | idx<<6 | MIIwrite);
while(rr(d, MIIaddr) & MIIbusy)
;
}
static int
eepromr(Dev *d, int off, uchar *buf, int len)
{
int i, v;
for(i = 0; i < E2pbusytime; i++)
if((rr(d, E2pcmd) & Busy) == 0)
break;
if(i == E2pbusytime)
return -1;
for(i = 0; i < len; i++){
wr(d, E2pcmd, Busy|Read|(i+off));
while((v = rr(d, E2pcmd) & (Busy|Timeout)) == Busy)
;
if(v & Timeout)
return -1;
buf[i] = rr(d, E2pdata);
}
return 0;
}
static void
phyinit(Dev *d)
{
int i;
miiwr(d, Bmcr, Bmcrreset|Anenable);
for(i = 0; i < Resettime/10; i++){
if((miird(d, Bmcr) & Bmcrreset) == 0)
break;
sleep(10);
}
miiwr(d, Advertise, Adcsma|Adall|Adpause|Adpauseasym);
// miiwr(d, Advertise, Adcsma|Ad10f|Ad10h|Adpause|Adpauseasym);
miird(d, Phyintsrc);
miiwr(d, Phyintmask, Anegcomp|Linkdown);
miiwr(d, Bmcr, miird(d, Bmcr)|Anenable|Anrestart);
}
static int
doreset(Dev *d, int reg, int bit)
{
int i;
if(wr(d, reg, bit) < 0)
return -1;
for(i = 0; i < Resettime/10; i++){
if((rr(d, reg) & bit) == 0)
return 1;
sleep(10);
}
return 0;
}
static int
smscreceive(Dev *ep)
{
Block *b;
uint hd;
int n;
if(Doburst)
b = allocb(Hsburst*512);
else
b = allocb(Maxpkt+4);
if((n = read(ep->dfd, b->wp, b->lim - b->base)) < 0){
freeb(b);
return -1;
}
b->wp += n;
while(BLEN(b) >= 4){
hd = GET4(b->rp);
b->rp += 4;
n = hd >> 16;
if(n > BLEN(b))
break;
if((hd & Rxerror) == 0){
if(n == BLEN(b)){
etheriq(b, 1);
return 0;
}
etheriq(copyblock(b, n), 1);
}
b->rp += (n + 3) & ~3;
}
freeb(b);
return 0;
}
static void
smsctransmit(Dev *ep, Block *b)
{
int n;
n = BLEN(b);
b->rp -= 8;
PUT4(b->rp, n | Txfirst | Txlast);
PUT4(b->rp+4, n);
write(ep->dfd, b->rp, BLEN(b));
freeb(b);
}
int
smscinit(Dev *d)
{
if(!doreset(d, Hwcfg, Lrst) || !doreset(d, Pmctrl, Phyrst))
return -1;
if(!setmac)
if(eepromr(d, MACoffset, macaddr, 6) < 0)
return -1;
wr(d, Addrl, GET4(macaddr));
wr(d, Addrh, GET2(macaddr+4));
if(Doburst){
wr(d, Hwcfg, (rr(d,Hwcfg)&~Rxdoff)|Bir|Mef|Bce);
wr(d, Burstcap, Hsburst);
}else{
wr(d, Hwcfg, (rr(d,Hwcfg)&~(Rxdoff|Mef|Bce))|Bir);
wr(d, Burstcap, 0);
}
wr(d, Bulkdelay, Defbulkdly);
wr(d, Intsts, ~0);
wr(d, Ledgpio, Ledspd|Ledlnk|Ledfdx);
wr(d, Flow, 0);
wr(d, Afccfg, Afcdefault);
wr(d, Vlan1, Ethp8021q);
wr(d, Coecr, rr(d,Coecr)&~(Txcoe|Rxcoe)); /* TODO could offload checksums? */
wr(d, Hashh, 0);
wr(d, Hashl, 0);
wr(d, Maccr, rr(d,Maccr)&~(Prms|Mcpas|Hpfilt));
phyinit(d);
wr(d, Intepctl, rr(d, Intepctl)|Phyint);
wr(d, Maccr, rr(d, Maccr)|Txen|Rxen);
wr(d, Txcfg, Txon);
eptransmit = smsctransmit;
epreceive = smscreceive;
return 0;
}