2 * USB Universal Host Controller Interface (sic) driver.
5 * - Too many delays and ilocks.
6 * - bandwidth admission control must be done per-frame.
7 * - interrupt endpoints should go on a tree like [oe]hci.
8 * - must warn of power overruns.
12 #include "../port/lib.h"
17 #include "../port/error.h"
18 #include "../port/usb.h"
20 typedef struct Ctlio Ctlio;
21 typedef struct Ctlr Ctlr;
22 typedef struct Isoio Isoio;
24 typedef struct Qhpool Qhpool;
25 typedef struct Qio Qio;
27 typedef struct Tdpool Tdpool;
31 Resetdelay = 100, /* delay after a controller reset (ms) */
32 Enabledelay = 100, /* waiting for a port to enable */
33 Abortdelay = 5, /* delay after cancelling Tds (ms) */
34 Incr = 64, /* for Td and Qh pools */
36 Tdatomic = 8, /* max nb. of Tds per bulk I/O op. */
38 /* Queue states (software) */
50 Nframes = 1024, /* 2ⁿ for xspanalloc; max 1024 */
51 Align = 16, /* for data structures */
53 /* Size of small buffer kept within Tds. (software) */
54 /* Keep as a multiple of Align to maintain alignment of Tds in pool */
58 * Some ports are short, some are long, some are byte.
59 * We use ins[bsl] and not vmap.
63 Chcreset = 0x02, /* host controller reset */
64 Cgreset = 0x04, /* global reset */
65 Cegsm = 0x08, /* enter global suspend */
66 Cfgr = 0x10, /* forge global resume */
67 Cdbg = 0x20, /* single step, debug */
68 Cmaxp = 0x80, /* max packet */
71 Susbintr = 0x01, /* interrupt */
72 Seintr = 0x02, /* error interrupt */
73 Sresume = 0x04, /* resume detect */
74 Shserr = 0x08, /* host system error */
75 Shcerr = 0x10, /* host controller error */
76 Shalted = 0x20, /* controller halted */
80 Itmout = 0x01, /* timeout or crc */
81 Iresume = 0x02, /* resume interrupt enable */
82 Ioc = 0x04, /* interrupt on complete */
83 Ishort = 0x08, /* short packet interrupt */
87 SOFmod = 0xC, /* start of frame modifier register */
90 PSpresent = 0x0001, /* device present */
91 PSstatuschg = 0x0002, /* PSpresent changed */
92 PSenable = 0x0004, /* device enabled */
93 PSchange = 0x0008, /* PSenable changed */
94 PSresume = 0x0040, /* resume detected */
95 PSreserved1 = 0x0080, /* always read as 1; reserved */
96 PSslow = 0x0100, /* device has low speed */
97 PSreset = 0x0200, /* port reset */
98 PSsuspend = 0x1000, /* port suspended */
100 /* Transfer descriptor link */
101 Tdterm = 0x1, /* nil (terminate) */
102 Tdlinkqh = 0x2, /* link refers to a QH */
103 Tdvf = 0x4, /* run linked Tds first (depth-first)*/
105 /* Transfer status bits */
106 Tdbitstuff = 0x00020000, /* bit stuffing error */
107 Tdcrcto = 0x00040000, /* crc or timeout error */
108 Tdnak = 0x00080000, /* nak packet received */
109 Tdbabble = 0x00100000, /* babble detected */
110 Tddberr = 0x00200000, /* data buf. error */
111 Tdstalled = 0x00400000, /* serious error to ep. */
112 Tdactive = 0x00800000, /* enabled/in use by hw */
113 /* Transfer control bits */
114 Tdioc = 0x01000000, /* interrupt on complete */
115 Tdiso = 0x02000000, /* isochronous select */
116 Tdlow = 0x04000000, /* low speed device */
117 Tderr1 = 0x08000000, /* bit 0 of error counter */
118 Tderr2 = 0x10000000, /* bit 1 of error counter */
119 Tdspd = 0x20000000, /* short packet detect */
121 Tdlen = 0x000003FF, /* actual length field */
123 Tdfatalerr = Tdnak|Tdbabble|Tdstalled, /* hw retries others */
124 Tderrors = Tdfatalerr|Tdbitstuff|Tdcrcto|Tddberr,
126 /* Transfer descriptor token bits */
128 Tddata1 = 0x80000, /* data toggle (1==DATA1) */
133 Tdmaxpkt = 0x800, /* max packet size */
135 /* Queue head bits */
136 QHterm = 1<<0, /* nil (terminate) */
137 QHlinkqh = 1<<1, /* link refers to a QH */
138 QHvf = 1<<2, /* vertical first (depth first) */
143 Lock; /* for ilock. qh lists and basic ctlr I/O */
144 QLock portlck; /* for port resets/enable... */
147 int port; /* I/O address */
148 Qh* qhs; /* list of Qhs for this controller */
149 Qh* qh[Tmax]; /* Dummy Qhs to insert Qhs after */
150 Isoio* iso; /* list of active iso I/O */
151 ulong* frames; /* frame list (used by hw) */
152 ulong load; /* max load for a single frame */
153 ulong isoload; /* max iso load for a single frame */
154 int nintr; /* number of interrupts attended */
155 int ntdintr; /* number of intrs. with something to do */
156 int nqhintr; /* number of intrs. for Qhs */
157 int nisointr; /* number of intrs. for iso transfers */
162 QLock; /* for the entire I/O process */
163 Rendez; /* wait for completion */
164 Qh* qh; /* Td list (field const after init) */
165 int usbid; /* usb address for endpoint/device */
166 int toggle; /* Tddata0/Tddata1 */
167 int tok; /* Tdtoksetup, Tdtokin, Tdtokout */
168 ulong iotime; /* time of last I/O */
169 int debug; /* debug flag from the endpoint */
170 char* err; /* error string */
175 Qio; /* a single Qio for each RPC */
176 uchar* data; /* read from last ctl req. */
177 int ndata; /* number of bytes read */
183 Rendez; /* wait for space/completion/errors */
184 int usbid; /* address used for device/endpoint */
185 int tok; /* Tdtokin or Tdtokout */
186 int state; /* Qrun -> Qdone -> Qrun... -> Qclose */
187 int nframes; /* Nframes/ep->pollival */
188 uchar* data; /* iso data buffers if not embedded */
189 int td0frno; /* frame number for first Td */
190 Td* tdu; /* next td for user I/O in tdps */
191 Td* tdi; /* next td processed by interrupt */
192 char* err; /* error string */
193 int nerrs; /* nb of consecutive I/O errors */
194 long nleft; /* number of bytes left from last write */
195 int debug; /* debug flag from the endpoint */
196 Isoio* next; /* in list of active Isoios */
197 Td* tdps[Nframes]; /* pointer to Td used for i-th frame or nil */
198 int delay; /* maximum number of bytes to buffer */
224 * Queue header (known by hw).
225 * 16-byte aligned. first two words used by hw.
226 * They are taken from the pool upon endpoint opening and
227 * queued after the dummy queue header for the endpoint type
228 * in the controller. Actual I/O happens as Tds are linked into it.
229 * The driver does I/O in lock-step.
230 * The user builds a list of Tds and links it into the Qh,
231 * then the Qh goes from Qidle to Qrun and nobody touches it until
232 * it becomes Qdone at interrupt time.
233 * At that point the user collects the Tds and it goes Qidle.
234 * A premature cancel may set the state to Qclose and abort I/O.
235 * The Ctlr lock protects change of state for Qhs in use.
239 ulong link; /* link to next horiz. item (eg. Qh) */
240 ulong elink; /* link to element (eg. Td; updated by hw) */
242 ulong state; /* Qidle -> Qinstall -> Qrun -> Qdone | Qclose */
243 Qio* io; /* for this queue */
245 Qh* next; /* in active or free list */
246 Td* tds; /* Td list in this Qh (initially, elink) */
247 char* tag; /* debug and align, mostly */
252 * Transfer descriptor.
253 * 16-byte aligned. first two words used by hw. Next 4 by sw.
254 * We keep an embedded buffer for small I/O transfers.
255 * They are taken from the pool when buffers are needed for I/O
256 * and linked at the Qh/Isoio for the endpoint and direction requiring it.
257 * The block keeps actual data. They are protected from races by
258 * the queue or the pool keeping it. The owner of the link to the Td
259 * is free to use it and can be the only one using it.
263 ulong link; /* Link to next Td or Qh */
264 ulong csw; /* control and status word (updated by hw) */
265 ulong token; /* endpt, device, pid */
266 ulong buffer; /* buffer pointer */
268 Td* next; /* in qh or Isoio or free list */
269 ulong ndata; /* bytes available/used at data */
270 uchar* data; /* pointer to actual data */
271 void* buff; /* allocated data, for large transfers */
273 uchar sbuff[Tdndata]; /* embedded buffer, for small transfers */
276 #define INB(x) inb(ctlr->port+(x))
277 #define INS(x) ins(ctlr->port+(x))
278 #define INL(x) inl(ctlr->port+(x))
279 #define OUTB(x, v) outb(ctlr->port+(x), (v))
280 #define OUTS(x, v) outs(ctlr->port+(x), (v))
281 #define OUTL(x, v) outl(ctlr->port+(x), (v))
282 #define TRUNC(x, sz) ((x) & ((sz)-1))
283 #define PTR(q) ((void*)KADDR((ulong)(q) & ~ (0xF|PCIWINDOW)))
284 #define QPTR(q) ((Qh*)PTR(q))
285 #define TPTR(q) ((Td*)PTR(q))
286 #define PORT(p) (Portsc0 + 2*(p))
287 #define diprint if(debug || iso->debug)print
288 #define ddiprint if(debug>1 || iso->debug>1)print
289 #define dqprint if(debug || (qh->io && qh->io->debug))print
290 #define ddqprint if(debug>1 || (qh->io && qh->io->debug>1))print
292 static Ctlr* ctlrs[Nhcis];
294 static Tdpool tdpool;
295 static Qhpool qhpool;
298 static char* qhsname[] = { "idle", "install", "run", "done", "close", "FREE" };
301 uhcicmd(Ctlr *ctlr, int c)
307 uhcirun(Ctlr *ctlr, int on)
311 ddprint("uhci %#ux setting run to %d\n", ctlr->port, on);
314 uhcicmd(ctlr, INS(Cmd)|Crun);
316 uhcicmd(ctlr, INS(Cmd) & ~Crun);
317 for(i = 0; i < 100; i++)
318 if(on == 0 && (INS(Status) & Shalted) != 0)
320 else if(on != 0 && (INS(Status) & Shalted) == 0)
325 dprint("uhci %#x run cmd timed out\n", ctlr->port);
326 ddprint("uhci %#ux cmd %#ux sts %#ux\n",
327 ctlr->port, INS(Cmd), INS(Status));
333 return (td->csw+1) & Tdlen;
339 return ((td->token>>21)+1) & (Tdmaxpkt-1);
345 return td->token & 0xFF;
349 seprinttd(char *s, char *se, Td *td)
351 s = seprint(s, se, "%#p link %#ulx", td, td->link);
352 if((td->link & Tdvf) != 0)
353 s = seprint(s, se, "V");
354 if((td->link & Tdterm) != 0)
355 s = seprint(s, se, "T");
356 if((td->link & Tdlinkqh) != 0)
357 s = seprint(s, se, "Q");
358 s = seprint(s, se, " csw %#ulx ", td->csw);
359 if(td->csw & Tdactive)
360 s = seprint(s, se, "a");
362 s = seprint(s, se, "I");
364 s = seprint(s, se, "i");
366 s = seprint(s, se, "l");
367 if((td->csw & (Tderr1|Tderr2)) == 0)
368 s = seprint(s, se, "z");
369 if(td->csw & Tderrors)
370 s = seprint(s, se, " err %#ulx", td->csw & Tderrors);
371 if(td->csw & Tdstalled)
372 s = seprint(s, se, "s");
373 if(td->csw & Tddberr)
374 s = seprint(s, se, "d");
375 if(td->csw & Tdbabble)
376 s = seprint(s, se, "b");
378 s = seprint(s, se, "n");
379 if(td->csw & Tdcrcto)
380 s = seprint(s, se, "c");
381 if(td->csw & Tdbitstuff)
382 s = seprint(s, se, "B");
383 s = seprint(s, se, " stslen %d", tdlen(td));
385 s = seprint(s, se, " token %#ulx", td->token);
386 if(td->token == 0) /* the BWS loopback Td, ignore rest */
388 s = seprint(s, se, " maxlen %d", maxtdlen(td));
389 if(td->token & Tddata1)
390 s = seprint(s, se, " d1");
392 s = seprint(s, se, " d0");
393 s = seprint(s, se, " id %#ulx:", (td->token>>15) & Epmax);
394 s = seprint(s, se, "%#ulx", (td->token>>8) & Devmax);
397 s = seprint(s, se, " in");
400 s = seprint(s, se, " out");
403 s = seprint(s, se, " setup");
406 s = seprint(s, se, " BADPID");
408 s = seprint(s, se, "\n\t buffer %#ulx data %#p", td->buffer, td->data);
409 s = seprint(s, se, " ndata %uld sbuff %#p buff %#p",
410 td->ndata, td->sbuff, td->buff);
412 s = seprintdata(s, se, td->data, td->ndata);
417 isodump(Isoio *iso, int all)
423 print("iso %#p %s state %d nframes %d"
424 " td0 %#p tdu %#p tdi %#p data %#p\n",
425 iso, iso->tok == Tdtokin ? "in" : "out",
426 iso->state, iso->nframes, iso->tdps[iso->td0frno],
427 iso->tdu, iso->tdi, iso->data);
429 print("\terr='%s'\n", iso->err);
431 seprinttd(buf, buf+sizeof(buf), iso->tdu);
432 print("\ttdu %s\n", buf);
433 seprinttd(buf, buf+sizeof(buf), iso->tdi);
434 print("\ttdi %s\n", buf);
436 td = iso->tdps[iso->td0frno];
437 for(i = 0; i < iso->nframes; i++){
438 seprinttd(buf, buf+sizeof(buf), td);
443 print("\t%s\n", buf);
450 sameptr(void *p, ulong l)
458 dumptd(Td *td, char *pref)
466 se = buf+sizeof(buf);
467 for(; td != nil; td = td->next){
468 s = seprinttd(buf, se, td);
469 if(!sameptr(td->next, td->link))
470 seprint(s, se, " next %#p != link %#ulx %#p",
471 td->next, td->link, TPTR(td->link));
472 print("%std %s\n", pref, buf);
474 print("...more tds...\n");
481 qhdump(Qh *qh, char *pref)
490 se = buf+sizeof(buf);
491 s = seprint(s, se, "%sqh %s %#p state %s link %#ulx", pref,
492 qh->tag, qh, qhsname[qh->state], qh->link);
493 if(!sameptr(qh->tds, qh->elink))
494 s = seprint(s, se, " [tds %#p != elink %#ulx %#p]",
495 qh->tds, qh->elink, TPTR(qh->elink));
496 if(!sameptr(qh->next, qh->link))
497 s = seprint(s, se, " [next %#p != link %#ulx %#p]",
498 qh->next, qh->link, QPTR(qh->link));
499 if((qh->link & Tdterm) != 0)
500 s = seprint(s, se, "T");
501 if((qh->link & Tdlinkqh) != 0)
502 s = seprint(s, se, "Q");
503 s = seprint(s, se, " elink %#ulx", qh->elink);
504 if((qh->elink & Tdterm) != 0)
505 s = seprint(s, se, "T");
506 if((qh->elink & Tdlinkqh) != 0)
507 s = seprint(s, se, "Q");
508 s = seprint(s, se, " io %#p", qh->io);
509 if(qh->io != nil && qh->io->err != nil)
510 seprint(s, se, " err='%s'", qh->io->err);
512 dumptd(qh->tds, "\t");
513 if((qh->elink & QHterm) == 0){
516 for(td = qh->elink; (td & Tdterm) == 0; td = TPTR(td)->link){
518 if(td == TPTR(td)->link) /* BWS Td */
530 xdump(Ctlr *ctlr, int doilock)
537 if(ctlr == ctlrs[0]){
539 print("tds: alloc %d = inuse %d + free %d\n",
540 tdpool.nalloc, tdpool.ninuse, tdpool.nfree);
543 print("qhs: alloc %d = inuse %d + free %d\n",
544 qhpool.nalloc, qhpool.ninuse, qhpool.nfree);
549 print("uhci port %#x frames %#p nintr %d ntdintr %d",
550 ctlr->port, ctlr->frames, ctlr->nintr, ctlr->ntdintr);
551 print(" nqhintr %d nisointr %d\n", ctlr->nqhintr, ctlr->nisointr);
552 print("cmd %#ux sts %#ux fl %#ulx ps1 %#ux ps2 %#ux frames[0] %#ulx\n",
553 INS(Cmd), INS(Status),
554 INL(Flbaseadd), INS(PORT(0)), INS(PORT(1)),
556 for(iso = ctlr->iso; iso != nil; iso = iso->next)
559 for(qh = ctlr->qhs; qh != nil; qh = qh->next){
585 if(tdpool.free == nil){
586 ddprint("uhci: tdalloc %d Tds\n", Incr);
587 pool = xspanalloc(Incr*sizeof(Td), Align, 0);
590 for(i=Incr; --i>=0;){
591 pool[i].next = tdpool.free;
592 tdpool.free = &pool[i];
594 tdpool.nalloc += Incr;
595 tdpool.nfree += Incr;
598 tdpool.free = td->next;
603 memset(td, 0, sizeof(Td));
605 assert(((ulong)td & 0xF) == 0);
617 td->next = tdpool.free;
625 qhlinkqh(Qh* qh, Qh* next)
630 next->link = qh->link;
631 next->next = qh->next;
632 qh->link = PCIWADDR(next)|QHlinkqh;
638 qhlinktd(Qh *qh, Td *td)
642 qh->elink = QHvf|QHterm;
644 qh->elink = PCIWADDR(td);
648 tdlinktd(Td *td, Td *next)
654 td->link = PCIWADDR(next)|Tdvf;
658 qhalloc(Ctlr *ctlr, Qh *prev, Qio *io, char *tag)
665 if(qhpool.free == nil){
666 ddprint("uhci: qhalloc %d Qhs\n", Incr);
667 pool = xspanalloc(Incr*sizeof(Qh), Align, 0);
670 for(i=Incr; --i>=0;){
671 pool[i].next = qhpool.free;
672 qhpool.free = &pool[i];
674 qhpool.nalloc += Incr;
675 qhpool.nfree += Incr;
678 qhpool.free = qh->next;
690 kstrdup(&qh->tag, tag);
699 assert(((ulong)qh & 0xF) == 0);
704 qhfree(Ctlr *ctlr, Qh *qh)
714 for(q = ctlr->qhs; q != nil; q = q->next)
718 panic("qhfree: nil q");
723 for(td = qh->tds; td != nil; td = ltd){
728 qh->state = Qfree; /* paranoia */
729 qh->next = qhpool.free;
736 ddprint("qhfree: qh %#p\n", qh);
745 return "crc/timeout error";
747 return "babble detected";
751 return "bit stuffing error";
763 return iso->state == Qclose ||
764 (iso->state == Qrun &&
765 iso->tok == Tdtokin && iso->tdi != iso->tdu);
774 return iso->state == Qclose ||
775 (iso->state == Qrun &&
776 iso->tok == Tdtokout && iso->tdu->next != iso->tdi);
787 if(iso->state == Qclose || iso->err || iso->delay == 0)
791 for(tdi = iso->tdi; tdi->next != iso->tdu; tdi = tdi->next){
792 if((tdi->csw & Tdactive) == 0)
794 delay += maxtdlen(tdi);
795 if(delay > iso->delay)
799 return delay <= iso->delay;
803 tdisoinit(Isoio *iso, Td *td, long count)
806 td->token = ((count-1)<<21)| ((iso->usbid & 0x7FF)<<8) | iso->tok;
807 td->csw = Tderr1|Tdiso|Tdactive|Tdioc;
811 * Process Iso i/o on interrupt. For writes update just error status.
812 * For reads update tds to reflect data and also error status.
813 * When tdi aproaches tdu, advance tdu; data may be lost.
814 * (If nframes is << Nframes tdu might be far away but this avoids
815 * races regarding frno.)
816 * If we suffer errors for more than half the frames we stall.
819 isointerrupt(Ctlr *ctlr, Isoio* iso)
827 if((tdi->csw & Tdactive) != 0) /* nothing new done */
830 ddiprint("isointr: iso %#p: tdi %#p tdu %#p\n", iso, tdi, iso->tdu);
831 if(iso->state != Qrun && iso->state != Qdone)
832 panic("isointr: iso state");
833 if(debug > 1 || iso->debug > 1)
836 nframes = iso->nframes / 2; /* limit how many we look */
839 for(i = 0; i < nframes && (tdi->csw & Tdactive) == 0; i++){
841 err = tdi->csw & Tderrors;
844 else if(iso->nerrs++ > iso->nframes/2)
845 tdi->csw |= Tdstalled;
846 if((tdi->csw & Tdstalled) != 0){
848 iso->err = errmsg(err);
849 diprint("isointerrupt: tdi %#p error %#ux %s\n",
851 diprint("ctlr load %uld\n", ctlr->load);
855 tdi->ndata = tdlen(tdi);
857 if(tdi->next == iso->tdu || tdi->next->next == iso->tdu){
858 memset(iso->tdu->data, 0, maxtdlen(iso->tdu));
859 tdisoinit(iso, iso->tdu, maxtdlen(iso->tdu));
860 iso->tdu = iso->tdu->next;
865 ddiprint("isointr: %d frames processed\n", i);
869 if(isocanwrite(iso) || isocanread(iso)){
870 diprint("wakeup iso %#p tdi %#p tdu %#p\n", iso,
877 * Process a Qh upon interrupt. There's one per ongoing user I/O.
878 * User process releases resources later, that is not done here.
879 * We may find in this order one or more Tds:
880 * - none/many non active and completed Tds
881 * - none/one (usually(!) not active) and failed Td
882 * - none/many active Tds.
883 * Upon errors the entire transfer is aborted and error reported.
884 * Otherwise, the transfer is complete only when all Tds are done or
885 * when a read with less than maxpkt is found.
886 * Use the software list and not qh->elink to avoid races.
887 * We could use qh->elink to see if there's something new or not.
890 qhinterrupt(Ctlr *ctlr, Qh *qh)
896 if(qh->state != Qrun)
897 panic("qhinterrupt: qh state");
899 panic("qhinterrupt: no tds");
900 if((qh->tds->csw & Tdactive) == 0)
901 ddqprint("qhinterrupt port %#ux qh %#p p0 %#x p1 %#x\n",
902 ctlr->port, qh, INS(PORT(0)), INS(PORT(1)));
903 for(td = qh->tds; td != nil; td = td->next){
904 if(td->csw & Tdactive)
907 if((td->csw & Tdstalled) != 0){
908 err = td->csw & Tderrors;
909 /* just stalled is end of xfer but not an error */
910 if(err != Tdstalled && qh->io->err == nil){
911 qh->io->err = errmsg(td->csw & Tderrors);
912 dqprint("qhinterrupt: td %#p error %#ux %s\n",
913 td, err, qh->io->err);
914 dqprint("ctlr load %uld\n", ctlr->load);
918 if((td->csw & Tdnak) != 0){ /* retransmit; not serious */
923 td->ndata = tdlen(td);
924 if(td->ndata < maxtdlen(td)){ /* EOT */
931 * Done. Make void the Tds not used (errors or EOT) and wakeup epio.
934 for(; td != nil; td = td->next)
941 interrupt(Ureg*, void *a)
957 if((sts & Sall) == 0){ /* not for us; sharing irq */
961 OUTS(Status, sts & Sall);
964 print("uhci %#ux: not running: uhci bug?\n", ctlr->port);
965 /* BUG: should abort everything in this case */
968 frptr = INL(Flbaseadd);
970 frno = TRUNC(frno, Nframes);
971 print("cmd %#ux sts %#ux frptr %#ux frno %d\n",
972 cmd, sts, frptr, frno);
976 * Will we know in USB 3.0 who the interrupt was for?.
977 * Do they still teach indexing in CS?
978 * This is Intel's doing.
980 for(iso = ctlr->iso; iso != nil; iso = iso->next)
981 if(iso->state == Qrun || iso->state == Qdone)
982 isointerrupt(ctlr, iso);
983 for(qh = ctlr->qhs; qh != nil; qh = qh->next)
984 if(qh->state == Qrun)
985 qhinterrupt(ctlr, qh);
986 else if(qh->state == Qclose)
992 * iso->tdu is the next place to put data. When it gets full
993 * it is activated and tdu advanced.
996 putsamples(Ctlr *ctlr, Isoio *iso, uchar *b, long count)
1001 for(tot = 0; isocanwrite(iso) && tot < count; tot += n){
1005 if(n > maxtdlen(tdu) - left)
1006 n = maxtdlen(tdu) - left;
1007 iunlock(ctlr); /* can pagefault here */
1008 memmove(tdu->data+left, b+tot, n);
1013 if(iso->nleft == maxtdlen(tdu)){
1014 tdisoinit(iso, tdu, iso->nleft);
1015 iso->tdu = tdu->next;
1023 * Queue data for writing and return error status from
1024 * last writes done, to maintain buffered data.
1027 episowrite(Ep *ep, Isoio *iso, void *a, long count)
1035 iso->debug = ep->debug;
1036 iso->delay = ep->sampledelay * ep->samplesz;
1037 diprint("uhci: episowrite: %#p ep%d.%d\n", iso, ep->dev->nb, ep->nb);
1046 if(iso->state == Qclose){
1048 error(iso->err ? iso->err : Eio);
1052 for(tot = 0; tot < count; tot += nw){
1053 while(isocanwrite(iso) == 0){
1055 diprint("uhci: episowrite: %#p sleep\n", iso);
1058 iso->err = "I/O timed out";
1062 tsleep(iso, isocanwrite, iso, ep->tmout);
1068 if(iso->state == Qclose || err != nil){
1070 error(err ? err : Eio);
1072 if(iso->state != Qrun)
1073 panic("episowrite: iso not running");
1074 nw = putsamples(ctlr, iso, b+tot, count-tot);
1076 while(isodelay(iso) == 0){
1078 sleep(iso, isodelay, iso);
1081 if(iso->state != Qclose)
1084 err = iso->err; /* in case it failed early */
1090 diprint("uhci: episowrite: %#p %d bytes\n", iso, tot);
1095 * Available data is kept at tdu and following tds, up to tdi (excluded).
1098 episoread(Ep *ep, Isoio *iso, void *a, int count)
1106 iso->debug = ep->debug;
1107 diprint("uhci: episoread: %#p ep%d.%d\n", iso, ep->dev->nb, ep->nb);
1119 if(iso->state == Qclose){
1121 error(iso->err ? iso->err : Eio);
1124 while(isocanread(iso) == 0){
1126 diprint("uhci: episoread: %#p sleep\n", iso);
1129 iso->err = "I/O timed out";
1133 tsleep(iso, isocanread, iso, ep->tmout);
1137 if(iso->state == Qclose){
1139 error(iso->err ? iso->err : Eio);
1143 for(tot = 0; iso->tdi != iso->tdu && tot < count; tot += nr){
1145 if(tdu->csw & Tdactive){
1146 diprint("uhci: episoread: %#p tdu active\n", iso);
1150 if(tot + nr > count)
1153 print("uhci: ep%d.%d: too many polls\n",
1154 ep->dev->nb, ep->nb);
1156 iunlock(ctlr); /* We could page fault here */
1157 memmove(b+tot, tdu->data, nr);
1160 memmove(tdu->data, tdu->data+nr, tdu->ndata - nr);
1163 if(tdu->ndata == 0){
1164 tdisoinit(iso, tdu, ep->maxpkt);
1165 iso->tdu = tdu->next;
1171 diprint("uhci: episoread: %#p %d bytes err '%s'\n", iso, tot, iso->err);
1187 epgettd(Ep *ep, Qio *io, int flags, void *a, int count)
1192 if(ep->maxpkt < count)
1193 error("maxpkt too short");
1195 if(count <= Tdndata)
1196 td->data = td->sbuff;
1198 td->data = td->buff = smalloc(ep->maxpkt);
1199 td->buffer = PCIWADDR(td->data);
1201 if(a != nil && count > 0)
1202 memmove(td->data, a, count);
1203 td->csw = Tderr2|Tderr1|flags;
1204 if(ep->dev->speed == Lowspeed)
1206 tok = io->tok | io->toggle;
1207 io->toggle = nexttoggle(io->toggle);
1208 td->token = ((count-1)<<21) | ((io->usbid&0x7FF)<<8) | tok;
1214 * Try to get them idle
1223 for(td = qh->tds; td != nil; td = td->next){
1224 if(td->csw & Tdactive)
1226 td->csw &= ~(Tdactive|Tdioc);
1236 return qh->state != Qrun;
1240 epiowait(Ctlr *ctlr, Qio *io, int tmout, ulong load)
1246 ddqprint("uhci io %#p sleep on qh %#p state %uld\n", io, qh, qh->state);
1249 dqprint("uhci io %#p qh %#p timed out\n", io, qh);
1253 sleep(io, epiodone, qh);
1255 tsleep(io, epiodone, qh, tmout);
1259 if(qh->state == Qrun)
1261 else if(qh->state != Qdone && qh->state != Qclose)
1262 panic("epio: queue not done and not closed");
1265 io->err = "request timed out";
1268 tsleep(&up->sleep, return0, 0, Abortdelay);
1273 if(qh->state != Qclose)
1282 * To make it work for control transfers, the caller may
1283 * lock the Qio for the entire control transfer.
1286 epio(Ep *ep, Qio *io, void *a, long count, int mustlock)
1288 Td *td, *ltd, *td0, *ntd;
1294 int saved, ntds, tmout;
1300 io->debug = ep->debug;
1302 ddeprint("epio: %s ep%d.%d io %#p count %ld load %uld\n",
1303 io->tok == Tdtokin ? "in" : "out",
1304 ep->dev->nb, ep->nb, io, count, ctlr->load);
1305 if((debug > 1 || ep->debug > 1) && io->tok != Tdtokin){
1306 seprintdata(buf, buf+sizeof(buf), a, count);
1307 print("uchi epio: user data: %s\n", buf);
1318 if(qh->state == Qclose){ /* Tds released by cancelio */
1320 error(io->err ? io->err : Eio);
1322 if(qh->state != Qidle)
1323 panic("epio: qh not idle");
1324 qh->state = Qinstall;
1334 if(c != nil && io->tok != Tdtokin)
1335 td = epgettd(ep, io, Tdactive, c+tot, n);
1337 td = epgettd(ep, io, Tdactive|Tdspd, nil, n);
1345 }while(tot < count);
1346 if(td0 == nil || ltd == nil)
1347 panic("epio: no td");
1349 ltd->csw |= Tdioc; /* the last one interrupts */
1350 ddeprint("uhci: load %uld ctlr load %uld\n", load, ctlr->load);
1352 if(qh->state != Qclose){
1353 io->iotime = TK2MS(MACHP(0)->ticks);
1361 epiowait(ctlr, io, tmout, load);
1363 if(debug > 1 || ep->debug > 1)
1364 dumptd(td0, "epio: got tds: ");
1370 for(td = td0; td != nil; td = ntd){
1373 * Use td tok, not io tok, because of setup packets.
1374 * Also, if the Td was stalled or active (previous Td
1375 * was a short packet), we must save the toggle as it is.
1377 if(td->csw & (Tdstalled|Tdactive)){
1379 io->toggle = td->token & Tddata1;
1382 if(c != nil && tdtok(td) == Tdtokin && td->ndata > 0){
1383 memmove(c, td->data, td->ndata);
1395 ddeprint("epio: io %#p: %d tds: return %ld err '%s'\n",
1396 io, ntds, tot, err);
1405 * halt condition was cleared on the endpoint. update our toggles.
1417 if(ep->mode != OREAD){
1419 io[OWRITE].toggle = Tddata0;
1420 deprint("ep clrhalt for io %#p\n", io+OWRITE);
1421 qunlock(&io[OWRITE]);
1423 if(ep->mode != OWRITE){
1425 io[OREAD].toggle = Tddata0;
1426 deprint("ep clrhalt for io %#p\n", io+OREAD);
1427 qunlock(&io[OREAD]);
1434 epread(Ep *ep, void *a, long count)
1442 ddeprint("uhci: epread\n");
1444 panic("epread: not open");
1454 ddeprint("epread ctl ndata %d\n", cio->ndata);
1456 error("request expected");
1457 else if(cio->ndata == 0){
1461 if(count > cio->ndata)
1464 memmove(a, cio->data, count);
1465 /* BUG for big transfers */
1468 cio->ndata = 0; /* signal EOF next time */
1472 if(debug>1 || ep->debug){
1473 seprintdata(buf, buf+sizeof(buf), a, count);
1474 print("epread: %s\n", buf);
1481 return epio(ep, &io[OREAD], a, count, 1);
1484 delta = TK2MS(MACHP(0)->ticks) - io[OREAD].iotime + 1;
1485 if(delta < ep->pollival / 2)
1486 tsleep(&up->sleep, return0, 0, ep->pollival/2 - delta);
1489 return epio(ep, &io[OREAD], a, count, 1);
1492 return episoread(ep, iso, a, count);
1494 panic("epread: bad ep ttype %d", ep->ttype);
1500 * Control transfers are one setup write (data0)
1501 * plus zero or more reads/writes (data1, data0, ...)
1502 * plus a final write/read with data1 to ack.
1503 * For both host to device and device to host we perform
1504 * the entire transfer when the user writes the request,
1505 * and keep any data read from the device for a later read.
1506 * We call epio three times instead of placing all Tds at
1507 * the same time because doing so leads to crc/tmout errors
1509 * Upon errors on the data phase we must still run the status
1510 * phase or the device may cease responding in the future.
1513 epctlio(Ep *ep, Ctlio *cio, void *a, long count)
1518 ddeprint("epctlio: cio %#p ep%d.%d count %ld\n",
1519 cio, ep->dev->nb, ep->nb, count);
1520 if(count < Rsetuplen)
1521 error("short usb comand");
1534 /* set the address if unset and out of configuration state */
1535 if(ep->dev->state != Dconfig && ep->dev->state != Dreset)
1537 cio->usbid = ((ep->nb&Epmax)<<7)|(ep->dev->nb&Devmax);
1539 cio->tok = Tdtoksetup;
1540 cio->toggle = Tddata0;
1541 if(epio(ep, cio, a, Rsetuplen, 0) < Rsetuplen)
1546 cio->toggle = Tddata1;
1547 if(c[Rtype] & Rd2h){
1549 len = GET2(c+Rcount);
1551 error("bad length in d2h request");
1553 error("d2h data too large to fit in uhci");
1554 a = cio->data = smalloc(len+1);
1556 cio->tok = Tdtokout;
1563 len = epio(ep, cio, a, len, 0);
1566 if(c[Rtype] & Rd2h){
1569 cio->tok = Tdtokout;
1574 count = Rsetuplen + len;
1577 cio->toggle = Tddata1;
1578 epio(ep, cio, nil, 0, 0);
1581 ddeprint("epctlio cio %#p return %ld\n", cio, count);
1586 epwrite(Ep *ep, void *a, long count)
1596 ddeprint("uhci: epwrite ep%d.%d\n", ep->dev->nb, ep->nb);
1598 panic("uhci: epwrite: not open");
1602 return epctlio(ep, cio, a, count);
1608 * Put at most Tdatomic Tds (512 bytes) at a time.
1609 * Otherwise some devices produce babble errors.
1612 for(tot = 0; tot < count ; tot += nw){
1614 if(nw > Tdatomic * ep->maxpkt)
1615 nw = Tdatomic * ep->maxpkt;
1616 nw = epio(ep, &io[OWRITE], b+tot, nw, 1);
1621 delta = TK2MS(MACHP(0)->ticks) - io[OWRITE].iotime + 1;
1622 if(delta < ep->pollival)
1623 tsleep(&up->sleep, return0, 0, ep->pollival - delta);
1626 return epio(ep, &io[OWRITE], a, count, 1);
1629 return episowrite(ep, iso, a, count);
1631 panic("uhci: epwrite: bad ep ttype %d", ep->ttype);
1648 if(ep->mode == ORDWR)
1649 error("iso i/o is half-duplex");
1652 iso->debug = ep->debug;
1653 iso->next = nil; /* paranoia */
1654 if(ep->mode == OREAD)
1657 iso->tok = Tdtokout;
1658 iso->usbid = ((ep->nb & Epmax)<<7)|(ep->dev->nb & Devmax);
1660 iso->nframes = Nframes/ep->pollival;
1661 if(iso->nframes < 3)
1662 error("uhci isoopen bug"); /* we need at least 3 tds */
1665 if(ctlr->load + ep->load > 800)
1666 print("usb: uhci: bandwidth may be exceeded\n");
1667 ctlr->load += ep->load;
1668 ctlr->isoload += ep->load;
1669 dprint("uhci: load %uld isoload %uld\n", ctlr->load, ctlr->isoload);
1673 * From here on this cannot raise errors
1674 * unless we catch them and release here all memory allocated.
1676 if(ep->maxpkt > Tdndata)
1677 iso->data = smalloc(iso->nframes*ep->maxpkt);
1679 frno = INS(Frnum) + 10; /* start 10ms ahead */
1680 frno = TRUNC(frno, Nframes);
1682 iso->td0frno = frno;
1685 for(i = 0; i < iso->nframes; i++){
1686 td = iso->tdps[frno] = tdalloc();
1687 if(ep->mode == OREAD)
1690 size = (ep->hz+left) * ep->pollival / 1000;
1691 size *= ep->samplesz;
1692 left = (ep->hz+left) * ep->pollival % 1000;
1693 if(size > ep->maxpkt){
1694 print("uhci: ep%d.%d: size > maxpkt\n",
1695 ep->dev->nb, ep->nb);
1696 print("size = %d max = %ld\n", size, ep->maxpkt);
1701 td->data = iso->data + i * ep->maxpkt;
1703 td->data = td->sbuff;
1704 td->buffer = PCIWADDR(td->data);
1705 tdisoinit(iso, td, size);
1709 frno = TRUNC(frno+ep->pollival, Nframes);
1711 ltd->next = iso->tdps[iso->td0frno];
1712 iso->tdi = iso->tdps[iso->td0frno];
1713 iso->tdu = iso->tdi;
1715 frno = iso->td0frno;
1716 for(i = 0; i < iso->nframes; i++){
1717 iso->tdps[frno]->link = ctlr->frames[frno];
1718 frno = TRUNC(frno+ep->pollival, Nframes);
1721 frno = iso->td0frno;
1722 for(i = 0; i < iso->nframes; i++){
1723 ctlr->frames[frno] = PCIWADDR(iso->tdps[frno]);
1724 frno = TRUNC(frno+ep->pollival, Nframes);
1726 iso->next = ctlr->iso;
1730 if(debug > 1 || iso->debug >1)
1735 * Allocate the endpoint and set it up for I/O
1736 * in the controller. This must follow what's said
1737 * in Ep regarding configuration, including perhaps
1738 * the saved toggles (saved on a previous close of
1739 * the endpoint data file by epclose).
1751 deprint("uhci: epopen ep%d.%d\n", ep->dev->nb, ep->nb);
1753 panic("uhci: epopen called with open ep");
1759 if(ep->maxpkt > Tdmaxpkt){
1760 print("uhci: maxkpkt too large: using %d\n", Tdmaxpkt);
1761 ep->maxpkt = Tdmaxpkt;
1763 cqh = ctlr->qh[ep->ttype];
1766 error("endpoint not configured");
1768 ep->aux = smalloc(sizeof(Isoio));
1772 cio = ep->aux = smalloc(sizeof(Ctlio));
1773 cio->debug = ep->debug;
1776 if(ep->dev->isroot != 0 && ep->nb == 0) /* root hub */
1778 cio->qh = qhalloc(ctlr, cqh, cio, "epc");
1782 io = ep->aux = smalloc(sizeof(Qio)*2);
1783 io[OREAD].debug = io[OWRITE].debug = ep->debug;
1784 usbid = ((ep->nb&Epmax)<<7)|(ep->dev->nb &Devmax);
1785 if(ep->mode != OREAD){
1786 if(ep->toggle[OWRITE] != 0)
1787 io[OWRITE].toggle = Tddata1;
1789 io[OWRITE].toggle = Tddata0;
1790 io[OWRITE].tok = Tdtokout;
1791 io[OWRITE].qh = qhalloc(ctlr, cqh, io+OWRITE, "epw");
1792 io[OWRITE].usbid = usbid;
1794 if(ep->mode != OWRITE){
1795 if(ep->toggle[OREAD] != 0)
1796 io[OREAD].toggle = Tddata1;
1798 io[OREAD].toggle = Tddata0;
1799 io[OREAD].tok = Tdtokin;
1800 io[OREAD].qh = qhalloc(ctlr, cqh, io+OREAD, "epr");
1801 io[OREAD].usbid = usbid;
1805 if(debug>1 || ep->debug)
1807 deprint("uhci: epopen done\n");
1812 cancelio(Ctlr *ctlr, Qio *io)
1818 if(io == nil || io->qh == nil || io->qh->state == Qclose){
1822 dqprint("uhci: cancelio for qh %#p state %s\n",
1823 qh, qhsname[qh->state]);
1828 tsleep(&up->sleep, return0, 0, Abortdelay);
1834 /* wait for epio if running */
1842 cancelisoio(Ctlr *ctlr, Isoio *iso, int pollival, ulong load)
1851 if(iso->state == Qclose){
1855 if(iso->state != Qrun && iso->state != Qdone)
1856 panic("bad iso state");
1857 iso->state = Qclose;
1858 if(ctlr->isoload < load)
1859 panic("uhci: low isoload");
1860 ctlr->isoload -= load;
1862 for(il = &ctlr->iso; *il != nil; il = &(*il)->next)
1866 panic("isocancel: not found");
1868 frno = iso->td0frno;
1869 for(i = 0; i < iso->nframes; i++){
1870 td = iso->tdps[frno];
1871 td->csw &= ~(Tdioc|Tdactive);
1872 for(lp=&ctlr->frames[frno]; !(*lp & Tdterm);
1873 lp = &TPTR(*lp)->link)
1877 panic("cancelisoio: td not found");
1879 frno = TRUNC(frno+pollival, Nframes);
1884 * wakeup anyone waiting for I/O and
1885 * wait to be sure no I/O is in progress in the controller.
1886 * and then wait to be sure episo-io is no longer running.
1889 diprint("cancelisoio iso %#p waiting for I/O to cease\n", iso);
1890 tsleep(&up->sleep, return0, 0, 5);
1893 diprint("cancelisoio iso %#p releasing iso\n", iso);
1895 frno = iso->td0frno;
1896 for(i = 0; i < iso->nframes; i++){
1897 tdfree(iso->tdps[frno]);
1898 iso->tdps[frno] = nil;
1899 frno = TRUNC(frno+pollival, Nframes);
1914 deprint("uhci: epclose ep%d.%d\n", ep->dev->nb, ep->nb);
1917 panic("uhci: epclose called with closed ep");
1921 cancelio(ctlr, cio);
1928 ep->toggle[OREAD] = ep->toggle[OWRITE] = 0;
1929 if(ep->mode != OWRITE){
1930 cancelio(ctlr, &io[OREAD]);
1931 if(io[OREAD].toggle == Tddata1)
1932 ep->toggle[OREAD] = 1;
1934 if(ep->mode != OREAD){
1935 cancelio(ctlr, &io[OWRITE]);
1936 if(io[OWRITE].toggle == Tddata1)
1937 ep->toggle[OWRITE] = 1;
1942 cancelisoio(ctlr, iso, ep->pollival, ep->load);
1945 panic("epclose: bad ttype %d", ep->ttype);
1954 seprintep(char *s, char *e, Ep *ep)
1971 s = seprint(s,e,"cio %#p qh %#p"
1972 " id %#x tog %#x tok %#x err %s\n",
1973 cio, cio->qh, cio->usbid, cio->toggle,
1974 cio->tok, cio->err);
1979 if(ep->mode != OWRITE)
1980 s = seprint(s,e,"r: qh %#p id %#x tog %#x tok %#x err %s\n",
1981 io[OREAD].qh, io[OREAD].usbid, io[OREAD].toggle,
1982 io[OREAD].tok, io[OREAD].err);
1983 if(ep->mode != OREAD)
1984 s = seprint(s,e,"w: qh %#p id %#x tog %#x tok %#x err %s\n",
1985 io[OWRITE].qh, io[OWRITE].usbid, io[OWRITE].toggle,
1986 io[OWRITE].tok, io[OWRITE].err);
1990 s = seprint(s,e,"iso %#p id %#x tok %#x tdu %#p tdi %#p err %s\n",
1991 iso, iso->usbid, iso->tok, iso->tdu, iso->tdi, iso->err);
1999 portenable(Hci *hp, int port, int on)
2006 dprint("uhci: %#x port %d enable=%d\n", ctlr->port, port, on);
2007 ioport = PORT(port-1);
2008 eqlock(&ctlr->portlck);
2010 qunlock(&ctlr->portlck);
2016 OUTS(ioport, s | PSenable);
2018 OUTS(ioport, s & ~PSenable);
2021 tsleep(&up->sleep, return0, 0, Enabledelay);
2022 dprint("uhci %#ux port %d enable=%d: sts %#x\n",
2023 ctlr->port, port, on, INS(ioport));
2024 qunlock(&ctlr->portlck);
2030 portreset(Hci *hp, int port, int on)
2038 dprint("uhci: %#ux port %d reset\n", ctlr->port, port);
2043 OUTS(p, INS(p) & ~PSreset);
2044 OUTS(p, INS(p) | PSenable);
2046 for(i=0; i<1000 && (INS(p) & PSenable) == 0; i++)
2048 OUTS(p, (INS(p) & ~PSreset)|PSenable);
2050 dprint("uhci %#ux after port %d reset: sts %#x\n",
2051 ctlr->port, port, INS(p));
2056 portstatus(Hci *hp, int port)
2064 ioport = PORT(port-1);
2065 eqlock(&ctlr->portlck);
2068 qunlock(&ctlr->portlck);
2073 if(s & (PSstatuschg | PSchange)){
2075 ddprint("uhci %#ux port %d status %#x\n", ctlr->port, port, s);
2078 qunlock(&ctlr->portlck);
2082 * We must return status bits as a
2083 * get port status hub request would do.
2106 static int already = 0;
2116 while(p = pcimatch(p, 0, 0)){
2118 * Find UHCI controllers (Programming Interface = 0).
2120 if(p->ccrb != Pcibcserial || p->ccru != Pciscusb)
2124 io = p->mem[4].bar & ~0x0F;
2130 print("usbuhci: %#x %#x: failed to map registers\n",
2134 if(ioalloc(io, p->mem[4].size, 0, "usbuhci") < 0){
2135 print("usbuhci: port %#ux in use\n", io);
2138 if(p->intl == 0xFF || p->intl == 0){
2139 print("usbuhci: no irq assigned for port %#ux\n", io);
2143 dprint("uhci: %#x %#x: port %#ux size %#x irq %d\n",
2144 p->vid, p->did, io, p->mem[4].size, p->intl);
2146 ctlr = malloc(sizeof(Ctlr));
2149 print("usbuhci: no memory\n");
2154 for(i = 0; i < Nhcis; i++)
2155 if(ctlrs[i] == nil){
2160 print("usbuhci: bug: no more controllers\n");
2165 uhcimeminit(Ctlr *ctlr)
2172 ctlr->qhs = ctlr->qh[Tctl] = qhalloc(ctlr, nil, nil, "CTL");
2173 ctlr->qh[Tintr] = qhalloc(ctlr, ctlr->qh[Tctl], nil, "INT");
2174 ctlr->qh[Tbulk] = qhalloc(ctlr, ctlr->qh[Tintr], nil, "BLK");
2176 /* idle Td from dummy Qh at the end. looped back to itself */
2177 /* This is a workaround for PIIX4 errata 29773804.pdf */
2178 qh = qhalloc(ctlr, ctlr->qh[Tbulk], nil, "BWS");
2180 td->link = PCIWADDR(td);
2183 /* loop (hw only) from the last qh back to control xfers.
2184 * this may be done only for some of them. Disable until ehci comes.
2187 qh->link = PCIWADDR(ctlr->qhs);
2189 frsize = Nframes*sizeof(ulong);
2190 ctlr->frames = xspanalloc(frsize, frsize, 0);
2191 if(ctlr->frames == nil)
2192 panic("uhci reset: no memory");
2195 for(i = 0; i < Nframes; i++)
2196 ctlr->frames[i] = PCIWADDR(ctlr->qhs)|QHlinkqh;
2197 OUTL(Flbaseadd, PCIWADDR(ctlr->frames));
2199 dprint("uhci %#ux flb %#ulx frno %#ux\n", ctlr->port,
2200 INL(Flbaseadd), INS(Frnum));
2211 dprint("uhci %#ux init\n", ctlr->port);
2214 OUTS(Usbintr, Itmout|Iresume|Ioc|Ishort);
2216 dprint("uhci: init: cmd %#ux sts %#ux sof %#ux",
2217 INS(Cmd), INS(Status), INS(SOFmod));
2218 dprint(" flb %#ulx frno %#ux psc0 %#ux psc1 %#ux",
2219 INL(Flbaseadd), INS(Frnum), INS(PORT(0)), INS(PORT(1)));
2220 /* guess other ports */
2221 for(i = 2; i < 6; i++){
2223 if(sts != 0xFFFF && (sts & PSreserved1) == 1){
2224 dprint(" psc%d %#ux", i, sts);
2229 for(i = 0; i < hp->nports; i++)
2235 uhcireset(Ctlr *ctlr)
2241 dprint("uhci %#ux reset\n", ctlr->port);
2244 * Turn off legacy mode. Some controllers won't
2245 * interrupt us as expected otherwise.
2248 pcicfgw16(ctlr->pcidev, 0xc0, 0x2000);
2252 uhcicmd(ctlr, Cgreset); /* global reset */
2254 uhcicmd(ctlr, 0); /* all halt */
2255 uhcicmd(ctlr, Chcreset); /* controller reset */
2256 for(i = 0; i < 100; i++){
2257 if((INS(Cmd) & Chcreset) == 0)
2262 print("uhci %#x controller reset timed out\n", ctlr->port);
2268 setdebug(Hci*, int d)
2289 static Lock resetlck;
2294 if(getconf("*nousbuhci"))
2301 * Any adapter matches if no hp->port is supplied,
2302 * otherwise the ports must match.
2305 for(i = 0; i < Nhcis && ctlrs[i] != nil; i++){
2307 if(ctlr->active == 0)
2308 if(hp->port == 0 || hp->port == ctlr->port){
2314 if(ctlrs[i] == nil || i == Nhcis)
2319 hp->port = ctlr->port;
2322 hp->nports = 2; /* default */
2328 * Linkage to the generic HCI driver.
2332 hp->interrupt = interrupt;
2333 hp->epopen = epopen;
2334 hp->epclose = epclose;
2335 hp->epread = epread;
2336 hp->epwrite = epwrite;
2337 hp->seprintep = seprintep;
2338 hp->portenable = portenable;
2339 hp->portreset = portreset;
2340 hp->portstatus = portstatus;
2341 hp->shutdown = shutdown;
2342 hp->debug = setdebug;
2350 addhcitype("uhci", reset);