static long
eptrans(Ep *ep, int rw, void *a, long n)
{
Hostchan *hc;
if(ep->clrhalt){
ep->clrhalt = 0;
if(ep->mode != OREAD)
ep->toggle[Write] = DATA0;
if(ep->mode != OWRITE)
ep->toggle[Read] = DATA0;
}
hc = chanalloc(ep);
if(waserror()){
ep->toggle[rw] = hc->hctsiz & Pid;
chanrelease(ep, hc);
if(strcmp(up->errstr, Estalled) == 0)
return 0;
nexterror();
}
chansetup(hc, ep);
if(rw == Read && ep->ttype == Tbulk)
n = multitrans(ep, hc, rw, a, n);
else{
n = chanio(ep, hc, rw == Read? Epin : Epout, ep->toggle[rw],
a, n);
ep->toggle[rw] = hc->hctsiz & Pid;
}
chanrelease(ep, hc);
poperror();
return n;
}
static long
ctltrans(Ep *ep, uchar *req, long n)
{
Hostchan *hc;
Epio *epio;
Block *b;
uchar *data;
int datalen;
epio = ep->aux;
if(epio->cb != nil){
freeb(epio->cb);
epio->cb = nil;
}
if(n < Rsetuplen)
error(Ebadlen);
if(req[Rtype] & Rd2h){
datalen = GET2(req+Rcount);
if(datalen <= 0 || datalen > Maxctllen)
error(Ebadlen);
/* XXX cache madness */
epio->cb = b = allocb(ROUND(datalen, ep->maxpkt) + CACHELINESZ);
b->wp = (uchar*)ROUND((uintptr)b->wp, CACHELINESZ);
//epio->cb = b = allocb(ROUND(datalen, ep->maxpkt));
//assert(((uintptr)b->wp & (BLOCKALIGN-1)) == 0);
memset(b->wp, 0x55, b->lim - b->wp);
cachedwbinvse(b->wp, b->lim - b->wp);
data = b->wp;
}else{
b = nil;
datalen = n - Rsetuplen;
data = req + Rsetuplen;
}
hc = chanalloc(ep);
if(waserror()){
chanrelease(ep, hc);
if(strcmp(up->env->errstr, Estalled) == 0)
return 0;
nexterror();
}
chansetup(hc, ep);
chanio(ep, hc, Epout, SETUP, req, Rsetuplen);
if(req[Rtype] & Rd2h){
if(ep->dev->hub <= 1){
ep->toggle[Read] = DATA1;
b->wp += multitrans(ep, hc, Read, data, datalen);
}else
b->wp += chanio(ep, hc, Epin, DATA1, data, datalen);
chanio(ep, hc, Epout, DATA1, nil, 0);
n = Rsetuplen;
}else{
if(datalen > 0)
chanio(ep, hc, Epout, DATA1, data, datalen);
chanio(ep, hc, Epin, DATA1, nil, 0);
n = Rsetuplen + datalen;
}
chanrelease(ep, hc);
poperror();
return n;
}
