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- #include "u.h"
- #include "../port/lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "io.h"
- #include "../port/error.h"
- #include "usb.h"
- static int debug = 0;
- #define Chatty 1
- #define DPRINT if(Chatty)print
- #define XPRINT if(debug)iprint
- Usbhost* usbhost[MaxUsb];
- static char *devstates[] = {
- [Disabled] "Disabled",
- [Attached] "Attached",
- [Enabled] "Enabled",
- [Assigned] "Assigned",
- [Configured] "Configured",
- };
- static char Ebadusbmsg[] = "invalid parameters to USB ctl message";
- enum
- {
- Qtopdir = 0,
- Q2nd,
- Qnew,
- Qport,
- Q3rd,
- Qctl,
- Qstatus,
- Qep0,
- /* other endpoint files */
- };
- /*
- * Qid path is:
- * 8 bits of file type (qids above)
- * 8 bits of slot number; default address 0 used for per-controller files
- * 4 bits of controller number
- */
- enum {
- TYPEBITS = 8,
- SLOTBITS = 8,
- CTLRBITS = 4,
- SLOTSHIFT = TYPEBITS,
- CTLRSHIFT = SLOTSHIFT+SLOTBITS,
- TYPEMASK = (1<<TYPEBITS)-1,
- SLOTMASK = (1<<SLOTBITS)-1,
- CTLRMASK = (1<<CTLRBITS)-1,
- };
- #define TYPE(q) (((ulong)(q).path)&TYPEMASK)
- #define SLOT(q) ((((ulong)(q).path)>>SLOTSHIFT)&SLOTMASK)
- #define CTLR(q) ((((ulong)(q).path)>>CTLRSHIFT)&CTLRMASK)
- #define PATH(t, s, c) ((t)|((s)<<SLOTSHIFT)|((c)<<CTLRSHIFT))
- static Dirtab usbdir2[] = {
- "new", {Qnew}, 0, 0666,
- "port", {Qport}, 0, 0666,
- };
- static Dirtab usbdir3[]={
- "ctl", {Qctl}, 0, 0666,
- "status", {Qstatus}, 0, 0444,
- "setup", {Qep0}, 0, 0666,
- /* epNdata names are generated on demand */
- };
- enum
- {
- PMdisable,
- PMenable,
- PMreset,
- };
- enum
- {
- CMclass,
- CMdata,
- CMdebug,
- CMep,
- CMmaxpkt,
- CMadjust,
- CMspeed,
- CMunstall,
- };
- static Cmdtab usbportmsg[] =
- {
- PMdisable, "disable", 2,
- PMenable, "enable", 2,
- PMreset, "reset", 2,
- };
- static Cmdtab usbctlmsg[] =
- {
- CMclass, "class", 4,
- CMdata, "data", 3,
- CMdebug, "debug", 3,
- CMep, "ep", 6,
- CMmaxpkt, "maxpkt", 3,
- CMadjust, "adjust", 3,
- CMspeed, "speed", 2,
- CMunstall, "unstall", 2,
- };
- static struct
- {
- char* type;
- int (*reset)(Usbhost*);
- } usbtypes[MaxUsb+1];
- void
- addusbtype(char* t, int (*r)(Usbhost*))
- {
- static int ntype;
- if(ntype == MaxUsb)
- panic("too many USB host interface types");
- usbtypes[ntype].type = t;
- usbtypes[ntype].reset = r;
- ntype++;
- }
- static Udev*
- usbdeviceofslot(Usbhost *uh, int s)
- {
- if(s < 0 || s > nelem(uh->dev))
- return nil;
- return uh->dev[s];
- }
- static Udev*
- usbdevice(Chan *c)
- {
- int bus;
- Udev *d;
- Usbhost *uh;
- bus = CTLR(c->qid);
- if(bus > nelem(usbhost) || (uh = usbhost[bus]) == nil) {
- error(Egreg);
- return nil; /* for compiler */
- }
- d = usbdeviceofslot(uh, SLOT(c->qid));
- if(d == nil || d->id != c->qid.vers || d->state == Disabled)
- error(Ehungup);
- return d;
- }
- static Endpt *
- devendpt(Udev *d, int id, int add)
- {
- Usbhost *uh;
- Endpt *e, **p;
- p = &d->ep[id&0xF];
- lock(d);
- e = *p;
- if(e != nil){
- incref(e);
- XPRINT("incref(0x%p) in devendpt, new value %ld\n", e, e->ref);
- unlock(d);
- return e;
- }
- unlock(d);
- if(!add)
- return nil;
- e = mallocz(sizeof(*e), 1);
- e->ref = 1;
- e->x = id&0xF;
- e->id = id;
- e->sched = -1;
- e->maxpkt = 8;
- e->nbuf = 1;
- e->dev = d;
- e->active = 0;
- uh = d->uh;
- uh->epalloc(uh, e);
- lock(d);
- if(*p != nil){
- incref(*p);
- XPRINT("incref(0x%p) in devendpt, new value %ld\n", *p, (*p)->ref);
- unlock(d);
- uh->epfree(uh, e);
- free(e);
- return *p;
- }
- *p = e;
- unlock(d);
- e->rq = qopen(8*1024, 0, nil, e);
- e->wq = qopen(8*1024, 0, nil, e);
- return e;
- }
- static void
- freept(Endpt *e)
- {
- Usbhost *uh;
- if(e != nil && decref(e) == 0){
- XPRINT("freept(%d,%d)\n", e->dev->x, e->x);
- uh = e->dev->uh;
- uh->epclose(uh, e);
- e->dev->ep[e->x] = nil;
- uh->epfree(uh, e);
- free(e);
- }
- }
- static Udev*
- usbnewdevice(Usbhost *uh)
- {
- int i;
- Udev *d;
- Endpt *e;
- d = nil;
- qlock(uh);
- if(waserror()){
- qunlock(uh);
- nexterror();
- }
- for(i=0; i<nelem(uh->dev); i++)
- if(uh->dev[i] == nil){
- uh->idgen++;
- d = mallocz(sizeof(*d), 1);
- d->uh = uh;
- d->ref = 1;
- d->x = i;
- d->id = (uh->idgen << 8) | i;
- d->state = Enabled;
- XPRINT("calling devendpt in usbnewdevice\n");
- e = devendpt(d, 0, 1); /* always provide control endpoint 0 */
- e->mode = ORDWR;
- e->iso = 0;
- e->sched = -1;
- uh->dev[i] = d;
- break;
- }
- poperror();
- qunlock(uh);
- return d;
- }
- static void
- freedev(Udev *d, int ept)
- {
- int i;
- Endpt *e;
- Usbhost *uh;
- uh = d->uh;
- if(decref(d) == 0){
- XPRINT("freedev 0x%p, 0\n", d);
- for(i=0; i<nelem(d->ep); i++)
- freept(d->ep[i]);
- if(d->x >= 0)
- uh->dev[d->x] = nil;
- free(d);
- } else {
- if(ept >= 0 && ept < nelem(d->ep)){
- e = d->ep[ept];
- XPRINT("freedev, freept 0x%p\n", e);
- if(e != nil)
- uh->epclose(uh, e);
- }
- }
- }
- static int
- usbgen(Chan *c, char *, Dirtab*, int, int s, Dir *dp)
- {
- Qid q;
- Udev *d;
- Endpt *e;
- Dirtab *tab;
- Usbhost *uh;
- int t, bus, slot, perm;
- /*
- * Top level directory contains the controller names.
- */
- if(c->qid.path == Qtopdir){
- if(s == DEVDOTDOT){
- mkqid(&q, Qtopdir, 0, QTDIR);
- devdir(c, q, "#U", 0, eve, 0555, dp);
- return 1;
- }
- if(s >= nelem(usbhost) || usbhost[s] == nil)
- return -1;
- mkqid(&q, PATH(Q2nd, 0, s), 0, QTDIR);
- snprint(up->genbuf, sizeof up->genbuf, "usb%d", s);
- devdir(c, q, up->genbuf, 0, eve, 0555, dp);
- return 1;
- }
- bus = CTLR(c->qid);
- if(bus >= nelem(usbhost) || (uh = usbhost[bus]) == nil)
- return -1;
- /*
- * Second level contains "new", "port", and a numbered
- * directory for each enumerated device on the bus.
- */
- t = TYPE(c->qid);
- if(t < Q3rd){
- if(s == DEVDOTDOT){
- mkqid(&q, Qtopdir, 0, QTDIR);
- devdir(c, q, "#U", 0, eve, 0555, dp);
- return 1;
- }
- if(s < nelem(usbdir2)){
- d = uh->dev[0];
- if(d == nil)
- return -1;
- tab = &usbdir2[s];
- mkqid(&q, PATH(tab->qid.path, 0, bus), d->id, QTFILE);
- devdir(c, q, tab->name, tab->length, eve, tab->perm, dp);
- return 1;
- }
- s -= nelem(usbdir2);
- if(s >= 0 && s < nelem(uh->dev)) {
- d = uh->dev[s];
- if(d == nil)
- return 0;
- sprint(up->genbuf, "%d", s);
- mkqid(&q, PATH(Q3rd, s, bus), d->id, QTDIR);
- devdir(c, q, up->genbuf, 0, eve, 0555, dp);
- return 1;
- }
- return -1;
- }
- /*
- * Third level.
- */
- slot = SLOT(c->qid);
- if(s == DEVDOTDOT) {
- mkqid(&q, PATH(Q2nd, 0, bus), c->qid.vers, QTDIR);
- snprint(up->genbuf, sizeof up->genbuf, "usb%d", bus);
- devdir(c, q, up->genbuf, 0, eve, 0555, dp);
- return 1;
- }
- if(s < nelem(usbdir3)) {
- tab = &usbdir3[s];
- mkqid(&q, PATH(tab->qid.path, slot, bus), c->qid.vers, QTFILE);
- devdir(c, q, tab->name, tab->length, eve, tab->perm, dp);
- return 1;
- }
- s -= nelem(usbdir3);
- /* active endpoints */
- d = usbdeviceofslot(uh, slot);
- if(d == nil || s >= nelem(d->ep))
- return -1;
- if(s == 0 || (e = d->ep[s]) == nil) /* ep0data is called "setup" */
- return 0;
- sprint(up->genbuf, "ep%ddata", s);
- mkqid(&q, PATH(Qep0+s, slot, bus), c->qid.vers, QTFILE);
- switch(e->mode) {
- case OREAD:
- perm = 0444;
- break;
- case OWRITE:
- perm = 0222;
- break;
- default:
- perm = 0666;
- break;
- }
- devdir(c, q, up->genbuf, e->buffered, eve, perm, dp);
- return 1;
- }
- static Usbhost*
- usbprobe(int cardno, int ctlrno)
- {
- Usbhost *uh;
- char buf[128], *ebuf, name[64], *p, *type;
- uh = malloc(sizeof(Usbhost));
- memset(uh, 0, sizeof(Usbhost));
- uh->tbdf = BUSUNKNOWN;
- if(cardno < 0){
- if(isaconfig("usb", ctlrno, uh) == 0){
- free(uh);
- return nil;
- }
- for(cardno = 0; usbtypes[cardno].type; cardno++){
- type = uh->type;
- if(type==nil || *type==0)
- type = "uhci";
- if(cistrcmp(usbtypes[cardno].type, type))
- continue;
- break;
- }
- }
- if(cardno >= MaxUsb || usbtypes[cardno].type == nil){
- free(uh);
- return nil;
- }
- if(usbtypes[cardno].reset(uh) < 0){
- free(uh);
- return nil;
- }
- /*
- * IRQ2 doesn't really exist, it's used to gang the interrupt
- * controllers together. A device set to IRQ2 will appear on
- * the second interrupt controller as IRQ9.
- */
- if(uh->irq == 2)
- uh->irq = 9;
- snprint(name, sizeof(name), "usb%d", ctlrno);
- intrenable(uh->irq, uh->interrupt, uh, uh->tbdf, name);
- ebuf = buf + sizeof buf;
- p = seprint(buf, ebuf, "#U/usb%d: %s: port 0x%luX irq %d", ctlrno, usbtypes[cardno].type, uh->port, uh->irq);
- if(uh->mem)
- p = seprint(p, ebuf, " addr 0x%luX", PADDR(uh->mem));
- if(uh->size)
- seprint(p, ebuf, " size 0x%luX", uh->size);
- print("%s\n", buf);
- return uh;
- }
- static void
- usbreset(void)
- {
- int cardno, ctlrno;
- Usbhost *uh;
- for(ctlrno = 0; ctlrno < MaxUsb; ctlrno++){
- if((uh = usbprobe(-1, ctlrno)) == nil)
- continue;
- usbhost[ctlrno] = uh;
- }
- if(getconf("*nousbprobe"))
- return;
- cardno = ctlrno = 0;
- while(usbtypes[cardno].type != nil && ctlrno < MaxUsb){
- if(usbhost[ctlrno] != nil){
- ctlrno++;
- continue;
- }
- if((uh = usbprobe(cardno, ctlrno)) == nil){
- cardno++;
- continue;
- }
- usbhost[ctlrno] = uh;
- ctlrno++;
- }
- }
- void
- usbinit(void)
- {
- Udev *d;
- int ctlrno;
- Usbhost *uh;
- for(ctlrno = 0; ctlrno < MaxUsb; ctlrno++){
- uh = usbhost[ctlrno];
- if(uh == nil)
- continue;
- if(uh->init != 0)
- uh->init(uh);
- /* reserve device for configuration */
- d = usbnewdevice(uh);
- incref(d);
- d->state = Attached;
- }
- }
- Chan *
- usbattach(char *spec)
- {
- return devattach('U', spec);
- }
- static Walkqid*
- usbwalk(Chan *c, Chan *nc, char **name, int nname)
- {
- return devwalk(c, nc, name, nname, nil, 0, usbgen);
- }
- static int
- usbstat(Chan *c, uchar *db, int n)
- {
- return devstat(c, db, n, nil, 0, usbgen);
- }
- Chan*
- usbopen(Chan *c, int omode)
- {
- Udev *d;
- Endpt *e;
- int f, s, type;
- Usbhost *uh;
- if(c->qid.type == QTDIR)
- return devopen(c, omode, nil, 0, usbgen);
- f = 0;
- type = TYPE(c->qid);
- if(type == Qnew){
- d = usbdevice(c);
- d = usbnewdevice(d->uh);
- XPRINT("usbopen, new dev 0x%p\n", d);
- if(d == nil) {
- XPRINT("usbopen failed (usbnewdevice)\n");
- error(Enodev);
- }
- type = Qctl;
- mkqid(&c->qid, PATH(type, d->x, CTLR(c->qid)), d->id, QTFILE);
- f = 1;
- }
- if(type < Q3rd){
- XPRINT("usbopen, devopen < Q3rd\n");
- return devopen(c, omode, nil, 0, usbgen);
- }
- d = usbdevice(c);
- uh = d->uh;
- qlock(uh);
- if(waserror()){
- qunlock(uh);
- nexterror();
- }
- switch(type){
- case Qctl:
- if(0&&d->busy)
- error(Einuse);
- d->busy = 1;
- if(!f)
- incref(d);
- XPRINT("usbopen, Qctl 0x%p\n", d);
- break;
- default:
- s = type - Qep0;
- XPRINT("usbopen, default 0x%p, %d\n", d, s);
- if(s >= 0 && s < nelem(d->ep)){
- if((e = d->ep[s]) == nil) {
- XPRINT("usbopen failed (endpoint)\n");
- error(Enodev);
- }
- XPRINT("usbopen: dev 0x%p, ept 0x%p\n", d, e);
- uh->epopen(uh, e);
- e->foffset = 0;
- e->toffset = 0;
- e->poffset = 0;
- e->buffered = 0;
- }
- incref(d);
- break;
- }
- poperror();
- qunlock(uh);
- c->mode = openmode(omode);
- c->flag |= COPEN;
- c->offset = 0;
- return c;
- }
- void
- usbclose(Chan *c)
- {
- Udev *d;
- int ept, type;
- Usbhost *uh;
- type = TYPE(c->qid);
- if(c->qid.type == QTDIR || type < Q3rd)
- return;
- d = usbdevice(c);
- uh = d->uh;
- qlock(uh);
- if(waserror()){
- qunlock(uh);
- nexterror();
- }
- if(type == Qctl)
- d->busy = 0;
- XPRINT("usbclose: dev 0x%p\n", d);
- if(c->flag & COPEN){
- ept = (type != Qctl) ? type - Qep0 : -1;
- XPRINT("usbclose: freedev 0x%p\n", d);
- freedev(d, ept);
- }
- poperror();
- qunlock(uh);
- }
- static char *
- epstatus(char *s, char *se, Endpt *e, int i)
- {
- char *p;
- p = seprint(s, se, "%2d %#6.6lux %10lud bytes %10lud blocks\n", i, e->csp, e->nbytes, e->nblocks);
- if(e->iso){
- p = seprint(p, se, "bufsize %6d buffered %6d", e->maxpkt, e->buffered);
- if(e->toffset)
- p = seprint(p, se, " offset %10lud time %19lld\n", e->toffset, e->time);
- p = seprint(p, se, "\n");
- }
- return p;
- }
- long
- usbread(Chan *c, void *a, long n, vlong offset)
- {
- int t, i;
- Udev *d;
- Endpt *e;
- Usbhost *uh;
- char *s, *se, *p;
- if(c->qid.type == QTDIR)
- return devdirread(c, a, n, nil, 0, usbgen);
- d = usbdevice(c);
- uh = d->uh;
- t = TYPE(c->qid);
- if(t >= Qep0) {
- t -= Qep0;
- if(t >= nelem(d->ep))
- error(Eio);
- e = d->ep[t];
- if(e == nil || e->mode == OWRITE)
- error(Egreg);
- if(t == 0) {
- if(e->iso)
- error(Egreg);
- e->data01 = 1;
- n = uh->read(uh, e, a, n, 0LL);
- if(e->setin){
- e->setin = 0;
- e->data01 = 1;
- uh->write(uh, e, "", 0, 0LL, TokOUT);
- }
- return n;
- }
- return uh->read(uh, e, a, n, offset);
- }
- s = smalloc(READSTR);
- se = s+READSTR;
- if(waserror()){
- free(s);
- nexterror();
- }
- switch(t){
- case Qport:
- uh->portinfo(uh, s, se);
- break;
- case Qctl:
- seprint(s, se, "%11d %11d\n", d->x, d->id);
- break;
- case Qstatus:
- p = seprint(s, se, "%s %#6.6lux\n", devstates[d->state], d->csp);
- for(i=0; i<nelem(d->ep); i++) {
- e = d->ep[i];
- if(e == nil)
- continue;
- /* TO DO: freeze e */
- p = epstatus(p, se, e, i);
- }
- }
- n = readstr(offset, a, n, s);
- poperror();
- free(s);
- return n;
- }
- long
- usbwrite(Chan *c, void *a, long n, vlong offset)
- {
- Udev *d;
- Endpt *e;
- Cmdtab *ct;
- Cmdbuf *cb;
- Usbhost *uh;
- int id, nw, t, i;
- char cmd[50];
- if(c->qid.type == QTDIR)
- error(Egreg);
- d = usbdevice(c);
- uh = d->uh;
- t = TYPE(c->qid);
- switch(t){
- case Qport:
- cb = parsecmd(a, n);
- if(waserror()){
- free(cb);
- nexterror();
- }
- ct = lookupcmd(cb, usbportmsg, nelem(usbportmsg));
- id = strtol(cb->f[1], nil, 0);
- switch(ct->index){
- case PMdisable:
- uh->portenable(uh, id, 0);
- break;
- case PMenable:
- uh->portenable(uh, id, 1);
- break;
- case PMreset:
- uh->portreset(uh, id);
- break;
- }
-
- poperror();
- free(cb);
- return n;
- case Qctl:
- cb = parsecmd(a, n);
- if(waserror()){
- free(cb);
- nexterror();
- }
- ct = lookupcmd(cb, usbctlmsg, nelem(usbctlmsg));
- switch(ct->index){
- case CMspeed:
- d->ls = strtoul(cb->f[1], nil, 0) == 0;
- break;
- case CMclass:
- i = strtoul(cb->f[2], nil, 0);
- d->npt = strtoul(cb->f[1], nil, 0);
- /* class config# csp ( == class subclass proto) */
- if (i < 0 || i >= nelem(d->ep)
- || d->npt > nelem(d->ep) || i >= d->npt)
- cmderror(cb, Ebadusbmsg);
- if (i == 0)
- d->csp = strtoul(cb->f[3], nil, 0);
- if(d->ep[i] == nil){
- XPRINT("calling devendpt in usbwrite (CMclass)\n");
- d->ep[i] = devendpt(d, i, 1);
- }
- d->ep[i]->csp = strtoul(cb->f[3], nil, 0);
- break;
- case CMdata:
- i = strtoul(cb->f[1], nil, 0);
- if(i < 0 || i >= nelem(d->ep) || d->ep[i] == nil)
- error(Ebadusbmsg);
- e = d->ep[i];
- e->data01 = strtoul(cb->f[2], nil, 0) != 0;
- break;
- case CMmaxpkt:
- i = strtoul(cb->f[1], nil, 0);
- if(i < 0 || i >= nelem(d->ep) || d->ep[i] == nil)
- error(Ebadusbmsg);
- e = d->ep[i];
- e->maxpkt = strtoul(cb->f[2], nil, 0);
- if(e->maxpkt > 1500)
- e->maxpkt = 1500;
- break;
- case CMadjust:
- i = strtoul(cb->f[1], nil, 0);
- if(i < 0 || i >= nelem(d->ep) || d->ep[i] == nil)
- error(Ebadusbmsg);
- e = d->ep[i];
- if (e->iso == 0)
- error(Eperm);
- i = strtoul(cb->f[2], nil, 0);
- /* speed may not result in change of maxpkt */
- if (i < (e->maxpkt-1)/e->samplesz * 1000/e->pollms
- || i > e->maxpkt/e->samplesz * 1000/e->pollms){
- snprint(cmd, sizeof(cmd), "%d < %d < %d?",
- (e->maxpkt-1)/e->samplesz * 1000/e->pollms,
- i,
- e->maxpkt/e->samplesz * 1000/e->pollms);
- error(cmd);
- }
- e->hz = i;
- break;
- case CMdebug:
- i = strtoul(cb->f[1], nil, 0);
- if(i < -1 || i >= nelem(d->ep) || d->ep[i] == nil)
- error(Ebadusbmsg);
- if (i == -1)
- debug = 0;
- else {
- debug = 1;
- e = d->ep[i];
- e->debug = strtoul(cb->f[2], nil, 0);
- }
- break;
- case CMunstall:
- i = strtoul(cb->f[1], nil, 0);
- if(i < 0 || i >= nelem(d->ep) || d->ep[i] == nil)
- error(Ebadusbmsg);
- e = d->ep[i];
- e->err = nil;
- break;
- case CMep:
- /* ep n `bulk' mode maxpkt nbuf OR
- * ep n period mode samplesize Hz
- */
- i = strtoul(cb->f[1], nil, 0);
- if(i < 0 || i >= nelem(d->ep)) {
- XPRINT("field 1: 0 <= %d < %d\n", i, nelem(d->ep));
- error(Ebadarg);
- }
- if((e = d->ep[i]) == nil){
- XPRINT("calling devendpt in usbwrite (CMep)\n");
- e = devendpt(d, i, 1);
- }
- qlock(uh);
- if(waserror()){
- freept(e);
- qunlock(uh);
- nexterror();
- }
- if(e->active)
- error(Eperm);
- if(strcmp(cb->f[2], "bulk") == 0){
- /* ep n `bulk' mode maxpkt nbuf */
- e->iso = 0;
- i = strtoul(cb->f[4], nil, 0);
- if(i < 8 || i > 1023)
- i = 8;
- e->maxpkt = i;
- i = strtoul(cb->f[5], nil, 0);
- if(i >= 1 && i <= 32)
- e->nbuf = i;
- } else {
- /* ep n period mode samplesize Hz */
- i = strtoul(cb->f[2], nil, 0);
- if(i > 0 && i <= 1000){
- e->pollms = i;
- }else {
- XPRINT("field 4: 0 <= %d <= 1000\n", i);
- error(Ebadarg);
- }
- i = strtoul(cb->f[4], nil, 0);
- if(i >= 1 && i <= 8){
- e->samplesz = i;
- }else {
- XPRINT("field 4: 0 < %d <= 8\n", i);
- error(Ebadarg);
- }
- i = strtoul(cb->f[5], nil, 0);
- if(i >= 1 && i*e->samplesz <= 12*1000*1000){
- /* Hz */
- e->hz = i;
- e->remain = 0;
- }else {
- XPRINT("field 5: 1 < %d <= 100000 Hz\n", i);
- error(Ebadarg);
- }
- e->maxpkt = (e->hz * e->pollms + 999)/1000 * e->samplesz;
- e->iso = 1;
- }
- e->mode = strcmp(cb->f[3],"r") == 0? OREAD :
- strcmp(cb->f[3],"w") == 0? OWRITE : ORDWR;
- uh->epmode(uh, e);
- poperror();
- qunlock(uh);
- }
-
- poperror();
- free(cb);
- return n;
- case Qep0: /* SETUP endpoint 0 */
- /* should canqlock etc */
- e = d->ep[0];
- if(e == nil || e->iso)
- error(Egreg);
- if(n < 8)
- error(Eio);
- nw = *(uchar*)a & RD2H;
- e->data01 = 0;
- n = uh->write(uh, e, a, n, 0LL, TokSETUP);
- if(nw == 0) { /* host to device: use IN[DATA1] to ack */
- e->data01 = 1;
- nw = uh->read(uh, e, cmd, 0LL, 8);
- if(nw != 0)
- error(Eio); /* could provide more status */
- }else
- e->setin = 1; /* two-phase */
- break;
- default: /* sends DATA[01] */
- t -= Qep0;
- if(t < 0 || t >= nelem(d->ep))
- error(Egreg);
- e = d->ep[t];
- if(e == nil || e->mode == OREAD)
- error(Egreg);
- n = uh->write(uh, e, a, n, offset, TokOUT);
- break;
- }
- return n;
- }
- Dev usbdevtab = {
- 'U',
- "usb",
- usbreset,
- usbinit,
- devshutdown,
- usbattach,
- usbwalk,
- usbstat,
- usbopen,
- devcreate,
- usbclose,
- usbread,
- devbread,
- usbwrite,
- devbwrite,
- devremove,
- devwstat,
- };
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