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- /*
- * USB Open Host Controller Interface (OHCI) driver
- * from devohci.c provided by Charles Forsyth, 5 Aug 2006.
- */
- #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"
- #define XPRINT if(usbhdebug) print
- #define XIPRINT if(usbhdebug) iprint
- #define XEPRINT if(usbhdebug || ep->debug) print
- #define XEIPRINT if(usbhdebug || ep->debug) iprint
- #define IPRINT(x) iprint x
- static int usbhdebug = 0;
- static int dcls;
- enum {
- Ned = 63 + 32,
- Ntd = 256,
- };
- /*
- * USB packet definitions
- */
- enum {
- Otoksetup = 0,
- Otokout = 1,
- Otokin = 2,
- /* port status - UHCI style */
- Suspend = 1<<12,
- PortReset = 1<<9,
- SlowDevice = 1<<8,
- ResumeDetect = 1<<6,
- PortEnableChange = 1<<3, /* write 1 to clear */
- PortEnable = 1<<2,
- ConnectStatusChange = 1<<1, /* write 1 to clear */
- DevicePresent = 1<<0,
- };
- typedef struct Ctlr Ctlr;
- typedef struct QTree QTree;
- enum {
- ED_MPS_MASK = 0x7ff,
- ED_MPS_SHIFT = 16,
- ED_C_MASK = 1,
- ED_C_SHIFT = 1,
- ED_F_BIT = 1 << 15,
- ED_S_MASK = 1,
- ED_S_SHIFT = 13,
- ED_D_MASK = 3,
- ED_D_SHIFT = 11,
- ED_H_MASK = 1,
- ED_H_SHIFT = 0,
- };
- typedef struct Endptx Endptx;
- typedef struct TD TD;
- struct Endptx
- {
- Lock; /* for manipulating ed */
- ED *ed; /* Single endpoint descriptor */
- int ntd; /* Number of TDs in use */
- int overruns;
- };
- struct TD {
- ulong ctrl;
- ulong cbp;
- ulong nexttd;
- ulong be;
- ushort offsets[8]; /* Iso TDs only */
- /* driver specific; pad to multiple of 32 */
- TD* next;
- Endpt *ep;
- Block *bp;
- ulong flags;
- ulong offset; /* offset associated with end of data */
- ulong bytes; /* bytes in this TD */
- ulong pad[2];
- };
- enum {
- TD_R_SHIFT = 18,
- TD_DP_MASK = 3,
- TD_DP_SHIFT = 19,
- TD_CC_MASK = 0xf,
- TD_CC_SHIFT = 28,
- TD_EC_MASK = 3,
- TD_EC_SHIFT = 26,
- TD_FLAGS_LAST = 1 << 0,
- };
- typedef struct HCCA HCCA;
- struct HCCA {
- ulong intrtable[32];
- ushort framenumber;
- ushort pad1;
- ulong donehead;
- uchar reserved[116];
- };
- /* OHCI registers */
- typedef struct OHCI OHCI;
- struct OHCI {
- /* control and status group */
- /*00*/ ulong revision;
- ulong control;
- ulong cmdsts;
- ulong intrsts;
- /*10*/ ulong intrenable;
- ulong intrdisable;
- /* memory pointer group */
- ulong hcca;
- ulong periodcurred;
- /*20*/ ulong ctlheaded;
- ulong ctlcurred;
- ulong bulkheaded;
- ulong bulkcurred;
- /*30*/ ulong donehead;
- /* frame counter group */
- ulong fminterval;
- ulong fmremaining;
- ulong fmnumber;
- /*40*/ ulong periodicstart;
- ulong lsthreshold;
- /* root hub group */
- ulong rhdesca;
- ulong rhdescb;
- /*50*/ ulong rhsts;
- ulong rhportsts[15];
- /*90*/ ulong pad25[20];
- /* unknown */
- /*e0*/ ulong hostueaddr;
- ulong hostuests;
- ulong hosttimeoutctrl;
- ulong pad59;
- /*f0*/ ulong pad60;
- ulong hostrevision;
- ulong pad62[2];
- /*100*/
- };
- /*
- * software structures
- */
- static struct {
- int bit;
- char *name;
- } portstatus[] = {
- { Suspend, "suspend", },
- { PortReset, "reset", },
- { SlowDevice, "lowspeed", },
- { ResumeDetect, "resume", },
- { PortEnableChange, "portchange", },
- { PortEnable, "enable", },
- { ConnectStatusChange, "statuschange", },
- { DevicePresent, "present", },
- };
- struct QTree {
- QLock;
- int nel;
- int depth;
- ulong* bw;
- ED **root;
- };
- /* device parameters */
- static char *devstates[] = {
- [Disabled] "Disabled",
- [Attached] "Attached",
- [Enabled] "Enabled",
- };
- struct Ctlr {
- Lock; /* protects state shared with interrupt (eg, free list) */
- int active;
- Pcidev* pcidev;
- int irq;
- ulong tbdf;
- Ctlr* next;
- int nports;
- OHCI *base; /* equiv to io in uhci */
- HCCA *uchcca;
- int idgen; /* version # to distinguish new connections */
- QLock resetl; /* lock controller during USB reset */
- struct {
- Lock;
- TD* pool;
- TD* free;
- int alloced;
- } td;
- struct {
- QLock;
- ED* pool;
- ED* free;
- int alloced;
- } ed;
- /* TODO: what happened to ctlq, etc. from uhci? */
- QTree* tree; /* tree for t Endpt i/o */
- struct {
- QLock;
- Endpt* f;
- } activends;
- };
- enum {
- HcRevision = 0x00,
- HcControl = 0x01,
- HcfsMask = 3 << 6,
- HcfsReset = 0 << 6,
- HcfsResume = 1 << 6,
- HcfsOperational=2 << 6,
- HcfsSuspend = 3 << 6,
- Ble = 1 << 5,
- Cle = 1 << 4,
- Ie = 1 << 3,
- Ple = 1 << 2,
- Cbsr_MASK = 3,
- HcCommandStatus = 0x02,
- Ocr = 1 << 3,
- Blf = 1 << 2,
- Clf = 1 << 1,
- Hcr = 1 << 0,
- HcIntrStatus = 0x03,
- HcIntrEnable = 0x04,
- Mie = 1 << 31,
- Oc = 1 << 30,
- Rhsc = 1 << 6,
- Fno = 1 << 5,
- Ue = 1 << 4,
- Rd = 1 << 3,
- Sf = 1 << 2,
- Wdh = 1 << 1,
- So = 1 << 0,
- HcIntrDisable = 0x05,
- HcFmIntvl = 0x0d,
- HcFmIntvl_FSMaxpack_MASK = 0x7fff,
- HcFmIntvl_FSMaxpack_SHIFT = 16,
- HcFmRemaining = 0x0e,
- HcFmNumber = 0x0f,
- HcLSThreshold = 0x11,
- HcRhDescA = 0x12,
- HcRhDescA_POTPGT_MASK = 0xff << 24,
- HcRhDescA_POTPGT_SHIFT = 24,
- HcRhDescB = 0x13,
- HcRhStatus = 0x14,
- Lps = 1 << 0,
- Cgp = 1 << 0,
- Oci = 1 << 1,
- Drwe = 1 << 15,
- Srwe = 1 << 15,
- LpsC = 1 << 16,
- Sgp = 1 << 16,
- Ccic = 1 << 17,
- Crwe = 1 << 31,
- HcRhPortStatus1 = 0x15,
- Ccs = 1 << 0,
- Cpe = 1 << 0,
- Pes = 1 << 1,
- Spe = 1 << 1,
- Pss = 1 << 2,
- Poci = 1 << 3,
- Prs = 1 << 4,
- Spr = 1 << 4,
- Pps = 1 << 8,
- Spp= 1 << 8,
- Lsda = 1 << 9,
- Cpp = 1 << 9,
- Csc = 1 << 16,
- Pesc = 1 << 17,
- Pssc = 1 << 18,
- Ocic = 1 << 19,
- Prsc = 1 << 20,
- HcRhPortStatus2 = 0x16,
- L2NFRAME = 5,
- NFRAME = 1 << L2NFRAME,
- /* TODO: from UHCI; correct for OHCI? */
- FRAMESIZE = NFRAME*sizeof(ulong), /* fixed by hardware; aligned to same */
- };
- char *usbmode[] = {
- [Ctlmode]= "Ctl",
- [Bulkmode] = "Bulk",
- [Intrmode] = "Intr",
- [Isomode] = "Iso",
- };
- static char *ousbmode[] = {
- [OREAD] = "r",
- [OWRITE] = "w",
- [ORDWR] = "rw",
- };
- int ohciinterrupts[Nmodes];
- static Ctlr* ctlrhead;
- static Ctlr* ctlrtail;
- static char Estalled[] = "usb endpoint stalled";
- static char EnotWritten[] = "usb write unfinished";
- static char EnotRead[] = "usb read unfinished";
- static char Eunderrun[] = "usb endpoint underrun";
- static QLock usbhstate; /* protects name space state */
- static void eptactivate(Ctlr *ub, Endpt *ep);
- static void eptdeactivate(Ctlr *ub, Endpt *e);
- static long read (Usbhost *, Endpt*, void*, long, vlong);
- static void scanpci(void);
- static int schedendpt(Ctlr *ub, Endpt *ep, int direction);
- static void unschedendpt(Ctlr *ub, Endpt *ep, int);
- static long write(Usbhost *, Endpt*, void*, long, vlong, int);
- static long qtd(Ctlr*, Endpt*, int, Block*, uchar*, uchar*, int, ulong);
- void
- printdata(void *pdata, int itemsize, int nitems)
- {
- int i;
- uchar *p1;
- ushort *p2;
- ulong *p4;
- if(!usbhdebug)
- return;
- p1 = pdata;
- p2 = pdata;
- p4 = pdata;
- i = 0;
- for(;;){
- switch(itemsize){
- default:
- assert(0);
- case 1:
- print("%2.2ux ", *p1++);
- break;
- case 2:
- print("%4.4ux ", *p2++);
- break;
- case 4:
- print("%8.8lux ", *p4++);
- break;
- }
- if(++i >= nitems || (i & ((0x40 >> itemsize) - 1)) == 0){
- print("\n");
- if(i >= nitems)
- break;
- }
- }
- }
- /*
- * i left these in so that we could use the same
- * driver on several other platforms (in principle).
- * the processor on which it was originally developed
- * had an IO MMU and thus another address space.
- * it's nothing to do with USB as such.
- */
- ulong
- va2hcva(void *va)
- {
- if(va == nil)
- return 0;
- return PADDR(va);
- }
- void *
- hcva2va(ulong hcva)
- {
- if(hcva == 0)
- return nil;
- return KADDR(hcva);
- }
- void *
- va2ucva(void *va)
- {
- return va;
- }
- void *
- hcva2ucva(ulong hcva)
- {
- if(hcva == 0)
- return nil;
- if(hcva & 0xf0000000){
- iprint("hcva2ucva: bad %#lux, called from %#p\n",
- hcva, getcallerpc(&hcva));
- return nil;
- }
- return KADDR(hcva);
- }
- #define IOCACHED 0
- #define invalidatedcacheva(va)
- #define dcclean(p, n)
- static void
- EDinit(ED *ed, int mps, int f, int k, int s, int d, int en, int fa,
- TD *tail, TD *head, int c, int h, ED *next)
- {
- /* check nothing is running? */
- ed->ctrl = (mps & ED_MPS_MASK) << ED_MPS_SHIFT
- | (f & 1) << 15
- | (k & 1) << 14
- | (s & ED_S_MASK) << ED_S_SHIFT
- | (d & 3) << 11 /* 00 is obtained from TD (used here) */
- | (en & 0xf) << 7
- | (fa & 0x7f);
- ed->tail = va2hcva(tail) & ~0xF;
- ed->head = (va2hcva(head) & ~0xF)
- | (c & ED_C_MASK) << ED_C_SHIFT
- | (h & ED_H_MASK) << ED_H_SHIFT;
- ed->next = va2hcva(next) & ~0xF;
- }
- static void
- EDsetS(ED *ed, int s)
- {
- XIPRINT("EDsetS: %s speed\n", s == Lowspeed ? "low" : "high");
- if(s == Lowspeed)
- ed->ctrl |= 1 << ED_S_SHIFT;
- else
- ed->ctrl &= ~(1 << ED_S_SHIFT);
- }
- static void
- EDsetMPS(ED *ed, int mps)
- {
- ed->ctrl = (ed->ctrl & ~(ED_MPS_MASK << ED_MPS_SHIFT)) |
- (mps & ED_MPS_MASK) << ED_MPS_SHIFT;
- }
- static void
- EDsetC(ED *ed, int c)
- {
- ed->head = (ed->head & ~(ED_C_MASK << ED_C_SHIFT)) |
- (c & ED_C_MASK) << ED_C_SHIFT;
- }
- static void
- EDsetH(ED *ed, int h)
- {
- ed->head = (ed->head & ~(ED_H_MASK << ED_H_SHIFT)) |
- (h & ED_H_MASK) << ED_H_SHIFT;
- }
- static int
- EDgetH(ED *ed)
- {
- return (ed->head >> ED_H_SHIFT) & ED_H_MASK;
- }
- static int
- EDgetC(ED *ed)
- {
- return (ed->head >> ED_C_SHIFT) & ED_C_MASK;
- }
- static void
- EDsetnext(ED *ed, void *va)
- {
- ed->next = va2hcva(va) & ~0xF;
- }
- static ED *
- EDgetnext(ED *ed)
- {
- return hcva2ucva(ed->next & ~0xF);
- }
- static void
- EDsettail(ED *ed, void *va)
- {
- ed->tail = va2hcva(va) & ~0xF;
- }
- static TD *
- EDgettail(ED *ed)
- {
- return hcva2ucva(ed->tail & ~0xF);
- }
- static void
- EDsethead(ED *ed, void *va)
- {
- ed->head = (ed->head & 0xf) | (va2hcva(va) & ~0xF);
- }
- static TD *
- EDgethead(ED *ed)
- {
- return hcva2ucva(ed->head & ~0xF);
- }
- static ED *
- EDalloc(Ctlr *ub)
- {
- ED *t;
- qlock(&ub->ed);
- t = ub->ed.free;
- if(t == nil){
- qunlock(&ub->ed);
- return nil;
- }
- ub->ed.free = (ED *)t->next;
- ub->ed.alloced++;
- if (0)
- print("%d endpoints allocated\n", ub->ed.alloced);
- qunlock(&ub->ed);
- t->next = 0;
- return t;
- }
- void
- TDsetnexttd(TD *td, TD *va)
- {
- td->nexttd = va2hcva(va) & ~0xF;
- }
- TD *
- TDgetnexttd(TD *td)
- {
- return hcva2ucva(td->nexttd & ~0xF);
- }
- void
- OHCIsetControlHeadED(OHCI *ohci, ED *va)
- {
- ohci->ctlheaded = va2hcva(va) & ~0xF;
- }
- ED *
- OHCIgetControlHeadED(OHCI *ohci)
- {
- return hcva2ucva(ohci->ctlheaded);
- }
- void
- OHCIsetBulkHeadED(OHCI *ohci, ED *va)
- {
- ohci->bulkheaded = va2hcva(va) & ~0xF;
- }
- ED *
- OHCIgetBulkHeadED(OHCI *ohci)
- {
- return hcva2ucva(ohci->bulkheaded);
- }
- static TD *
- TDalloc(Ctlr *ub, Endpt *ep, int musthave) /* alloctd */
- {
- TD *t;
- Endptx *epx;
- for(;;){
- ilock(ub);
- t = ub->td.free;
- if(t)
- break;
- iunlock(ub);
- if(up == nil){
- if(musthave)
- panic("TDalloc: out of descs");
- return nil;
- }
- tsleep(&up->sleep, return0, 0, 100);
- }
- ub->td.free = t->next;
- epx = ep->private;
- epx->ntd++;
- ub->td.alloced++;
- iunlock(ub);
- memset(t, 0, sizeof(TD));
- t->ep = ep;
- return t;
- }
- /* call under ilock */
- static void
- TDfree(Ctlr *ub, TD *t) /* freetd */
- {
- Endptx *epx;
- if(t == 0)
- return;
- if(t->ep){
- epx = t->ep->private;
- epx->ntd--;
- } else
- t->ep = nil; /* redundant? */
- t->bp = nil;
- t->next = ub->td.free;
- ub->td.free = t;
- ub->td.alloced--;
- }
- static void
- EDfree(Ctlr *ub, ED *t)
- {
- TD *td, *next;
- if(t == 0)
- return;
- qlock(&ub->ed);
- t->next = (ulong)ub->ed.free;
- ub->ed.free = t;
- ub->ed.alloced--;
- if (0)
- print("%d endpoints allocated\n", ub->ed.alloced);
- ilock(ub);
- for(td = EDgethead(t); td; td = next){
- next = TDgetnexttd(td);
- TDfree(ub, td);
- }
- iunlock(ub);
- EDsethead(t, 0);
- EDsettail(t, 0);
- qunlock(&ub->ed);
- }
- static void
- waitSOF(Ctlr *ub)
- {
- /*
- * wait for SOF - interlock with interrupt handler so
- * done queue processed first.
- */
- int frame = ub->uchcca->framenumber & 0x3f;
- do {
- delay(2);
- } while(frame == (ub->uchcca->framenumber & 0x3f));
- }
- static void
- dumptd(TD *td, char *s)
- {
- int i;
- Endpt *ep;
- ep = td->ep;
- print("\t%s: %#p ctrl %#.8lux cbp %#.8lux "
- "nexttd %#.8lux be %#.8lux, flags %#lux\n",
- s, td, td->ctrl, td->cbp, td->nexttd, td->be, td->flags);
- if(ep->epmode != Isomode){
- print("\t\tbytes: %ld\n", td->be + 1 - td->cbp);
- return;
- }
- print("\t\t%#ux %#ux %#ux %#ux %#ux %#ux %#ux %#ux\n",
- td->offsets[0], td->offsets[1], td->offsets[2], td->offsets[3],
- td->offsets[4], td->offsets[5], td->offsets[6], td->offsets[7]);
- print("\t\tbytes:");
- for(i = 0; i < td->ctrl >> 24 & 0x7; i++)
- print(" %d", (td->offsets[i+1]-td->offsets[i])&0xfff);
- print(" %ld\n", (td->be + 1 - td->offsets[i]) & 0xfff);
- }
- static void
- dumped(ED *ed)
- {
- TD *tailp, *td;
- tailp = EDgettail(ed);
- td = EDgethead(ed);
- print("dumpED %#p: ctrl %#lux tail %#lux head %#lux next %#lux\n",
- ed, ed->ctrl, ed->tail, ed->head, ed->next);
- if(tailp == td)
- return;
- do {
- dumptd(td, "td");
- } while((td = TDgetnexttd(td)) != tailp);
- }
- static void
- dumpstatus(Ctlr *ub)
- {
- ED *ed;
- print("dumpstatus %#p, frame %#ux:\n", ub, ub->uchcca->framenumber);
- print("control %#lux, cmdstat %#lux, intrsts %#lux\n",
- ub->base->control, ub->base->cmdsts, ub->base->intrsts);
- print("Control:\n");
- for(ed = OHCIgetControlHeadED(ub->base); ed; ed = EDgetnext(ed))
- dumped(ed);
- print("Bulk:\n");
- for(ed = OHCIgetBulkHeadED(ub->base); ed; ed = EDgetnext(ed))
- dumped(ed);
- print("Iso:\n");
- for(ed = ub->tree->root[0]; ed; ed = EDgetnext(ed))
- dumped(ed);
- print("frame %#ux:\n", ub->uchcca->framenumber);
- }
- /*
- * halt the ED and free input or output transfer descs
- * called when the relevant lock in the enclosing Endpt is held
- */
- static void
- EDcancel(Ctlr *ub, ED *ed, int dirin)
- {
- int tddir, iso, n;
- TD *tailp, *headp, *td, *prev, *next;
- Endpt *ep;
- if(ed == nil)
- return;
- /* halt ED if not already halted */
- if(EDgetH(ed) != 1){
- EDsetH(ed, 1);
- waitSOF(ub);
- }
- SET(tddir);
- if((iso = ed->ctrl & ED_F_BIT) != 0)
- switch((ed->ctrl >> 11) & 0x3){
- default:
- panic("ED iso direction unset");
- case Otokin: tddir = Dirin; break;
- case Otokout: tddir = Dirout; break;
- }
- /* can now clean up TD list of ED */
- tailp = EDgettail(ed);
- headp = EDgethead(ed);
- n = 0;
- prev = nil;
- td = headp;
- while(td != tailp){
- ep = td->ep;
- if(iso == 0)
- switch((td->ctrl >> TD_DP_SHIFT) & TD_DP_MASK){
- default:
- panic("TD direction unset");
- case Otoksetup: tddir = Dirout; break;
- case Otokin: tddir = Dirin; break;
- case Otokout: tddir = Dirout; break;
- }
- else if(usbhdebug || ep->debug)
- print("EDcancel: buffered: %d, bytes %ld\n",
- ep->buffered, td->bytes);
- next = TDgetnexttd(td);
- if(dirin == 2 || dirin == tddir){
- XEPRINT("%d/%d: EDcancel %d\n", ep->dev->x, ep->x, tddir);
- /* Remove this sucker */
- ep->buffered -= td->bytes;
- if(ep->buffered < 0)
- ep->buffered = 0;
- ilock(ub);
- ep->dir[tddir].queued--;
- if(tddir == Dirout){
- freeb(td->bp);
- td->bp = nil;
- }
- if(prev)
- TDsetnexttd(prev, next);
- else
- EDsethead(ed, next);
- TDfree(ub, td);
- n++;
- iunlock(ub);
- }else{
- XEPRINT("%d/%d: EDcancel skip %d\n", ep->dev->x, ep->x,
- tddir);
- prev = td;
- }
- td = next;
- }
- XPRINT("EDcancel: %d\n", n);
- }
- static void
- eptactivate(Ctlr *ub, Endpt *ep)
- {
- Endptx *epx;
- qlock(&ub->activends);
- if(ep->active == 0){
- epx = ep->private;
- XEPRINT("%d/%d: activate\n", ep->dev->x, ep->x);
- ep->active = 1;
- /*
- * set the right speed
- */
- EDsetS(epx->ed, ep->dev->speed);
- switch(ep->epmode){
- case Ctlmode:
- /*
- * chain the two descs together, and
- * bind to beginning of control queue
- */
- EDsetnext(epx->ed, OHCIgetControlHeadED(ub->base));
- OHCIsetControlHeadED(ub->base, epx->ed);
- /*
- * prompt controller to absorb new queue on next pass
- */
- ub->base->cmdsts |= Clf;
- XEPRINT("%d/%d: activated in control queue\n",
- ep->dev->x, ep->x);
- break;
- case Bulkmode:
- EDsetnext(epx->ed, OHCIgetBulkHeadED(ub->base));
- OHCIsetBulkHeadED(ub->base, epx->ed);
- ub->base->cmdsts |= Blf;
- XEPRINT("%d/%d: activated %s in bulk input queue\n",
- ep->dev->x, ep->x, ousbmode[ep->mode]);
- break;
- case Isomode:
- if(ep->mode != OWRITE)
- schedendpt(ub, ep, Dirin);
- if(ep->mode != OREAD)
- schedendpt(ub, ep, Dirout);
- ep->buffered = 0;
- ep->partial = 0;
- break;
- case Intrmode:
- if(ep->mode != OWRITE)
- schedendpt(ub, ep, Dirin);
- if(ep->mode != OREAD)
- schedendpt(ub, ep, Dirout);
- break;
- case Nomode:
- break;
- default:
- panic("eptactivate: wierd epmode %d", ep->epmode);
- }
- ep->dir[Dirin].xdone = ep->dir[Dirin].xstarted = 0;
- ep->dir[Dirout].xdone = ep->dir[Dirout].xstarted = 0;
- ep->activef = ub->activends.f;
- ub->activends.f = ep;
- }
- qunlock(&ub->activends);
- }
- static void
- EDpullfrombulk(Ctlr *ub, ED *ed)
- {
- ED *this, *prev, *next;
- this = OHCIgetBulkHeadED(ub->base);
- ub->base->bulkcurred = 0;
- prev = nil;
- while(this != nil && this != ed){
- prev = this;
- this = EDgetnext(this);
- }
- if(this == nil){
- print("EDpullfrombulk: not found\n");
- return;
- }
- next = EDgetnext(this);
- if(prev == nil)
- OHCIsetBulkHeadED(ub->base, next);
- else
- EDsetnext(prev, next);
- EDsetnext(ed, nil); /* wipe out next field */
- }
- static void
- EDpullfromctl(Ctlr *ub, ED *ed)
- {
- ED *this, *prev, *next;
- this = OHCIgetControlHeadED(ub->base);
- ub->base->ctlcurred = 0;
- prev = nil;
- while(this != nil && this != ed){
- prev = this;
- this = EDgetnext(this);
- }
- if(this == nil)
- panic("EDpullfromctl: not found");
- next = EDgetnext(this);
- if(prev == nil)
- OHCIsetControlHeadED(ub->base, next);
- else
- EDsetnext(prev, next);
- EDsetnext(ed, nil); /* wipe out next field */
- }
- static void
- eptdeactivate(Ctlr *ub, Endpt *ep)
- {
- ulong ctrl;
- Endpt **l;
- Endptx *epx;
- /* could be O(1) but not worth it yet */
- qlock(&ub->activends);
- if(ep->active){
- epx = ep->private;
- XEPRINT("ohci: eptdeactivate %d/%d\n", ep->dev->x, ep->x);
- ep->active = 0;
- for(l = &ub->activends.f; *l != ep; l = &(*l)->activef)
- if(*l == nil){
- qunlock(&ub->activends);
- panic("usb eptdeactivate");
- }
- *l = ep->activef;
- /* pull it from the appropriate queue */
- ctrl = ub->base->control;
- switch(ep->epmode){
- case Ctlmode:
- if(ctrl & Cle){
- ub->base->control &= ~Cle;
- waitSOF(ub);
- }
- EDpullfromctl(ub, epx->ed);
- if(ctrl & Cle){
- ub->base->control |= Cle;
- /*
- * don't fill it if there is nothing in it -
- * shouldn't be necessary according to the
- * spec., but practice is different
- */
- if(OHCIgetControlHeadED(ub->base))
- ub->base->cmdsts |= Clf;
- }
- break;
- case Bulkmode:
- if(ctrl & Ble){
- ub->base->control &= ~Ble;
- waitSOF(ub);
- }
- EDpullfrombulk(ub, epx->ed);
- if(ctrl & Ble){
- ub->base->control |= Ble;
- /*
- * don't fill it if there is nothing in it -
- * shouldn't be necessary according to the
- * spec., but practice is different
- */
- if(OHCIgetBulkHeadED(ub->base))
- ub->base->cmdsts |= Blf;
- }
- break;
- case Intrmode:
- case Isomode:
- if(ep->mode != OWRITE)
- unschedendpt(ub, ep, Dirin);
- if(ep->mode != OREAD)
- unschedendpt(ub, ep, Dirout);
- waitSOF(ub);
- break;
- case Nomode:
- break;
- default:
- panic("eptdeactivate: wierd in.epmode %d",
- ep->epmode);
- }
- }
- qunlock(&ub->activends);
- }
- static void
- kickappropriatequeue(Ctlr *ub, Endpt *ep, int)
- {
- switch(ep->epmode){
- case Nomode:
- break;
- case Ctlmode:
- ub->base->cmdsts |= Clf;
- break;
- case Bulkmode:
- ub->base->cmdsts |= Blf;
- break;
- case Intrmode:
- case Isomode:
- /* no kicking required */
- break;
- default:
- panic("wierd epmode %d", ep->epmode);
- }
- }
- static void
- eptenable(Ctlr *ub, Endpt *ep, int dirin)
- {
- ED *ed;
- Endptx *epx;
- epx = ep->private;
- ed = epx->ed;
- if(EDgetH(ed) == 1){
- EDsetH(ed, 0);
- kickappropriatequeue(ub, ep, dirin);
- if(ep->epmode == Isomode || ep->epmode == Intrmode)
- waitSOF(ub);
- }
- }
- /*
- * return smallest power of 2 >= n
- */
- static int
- flog2(int n)
- {
- int i;
- for(i = 0; (1 << i) < n; i++)
- ;
- return i;
- }
- /*
- * return smallest power of 2 <= n
- */
- static int
- flog2lower(int n)
- {
- int i;
- for(i = 0; (1 << (i + 1)) <= n; i++)
- ;
- return i;
- }
- static int
- pickschedq(QTree *qt, int pollms, ulong bw, ulong limit)
- {
- int i, j, d, upperb, q;
- ulong best, worst, total;
- d = flog2lower(pollms);
- if(d > qt->depth)
- d = qt->depth;
- q = -1;
- worst = 0;
- best = ~0;
- upperb = (1 << (d+1)) - 1;
- for(i = (1 << d) - 1; i < upperb; i++){
- total = qt->bw[0];
- for(j = i; j > 0; j = (j - 1) / 2)
- total += qt->bw[j];
- if(total < best){
- best = total;
- q = i;
- }
- if(total > worst)
- worst = total;
- }
- if(worst + bw >= limit)
- return -1;
- return q;
- }
- static int
- schedendpt(Ctlr *ub, Endpt *ep, int dirin)
- {
- int q;
- ED *ed;
- Endptx *epx;
- epx = ep->private;
- qlock(ub->tree);
- /* TO DO: bus bandwidth limit */
- q = pickschedq(ub->tree, ep->pollms, ep->bw, ~0);
- XEPRINT("schedendpt, dir %d Q index %d, ms %d, bw %ld\n",
- dirin, q, ep->pollms, ep->bw);
- if(q < 0){
- qunlock(ub->tree);
- return -1;
- }
- ub->tree->bw[q] += ep->bw;
- ed = ub->tree->root[q];
- ep->sched = q;
- EDsetnext(epx->ed, EDgetnext(ed));
- EDsetnext(ed, epx->ed);
- XEPRINT("%d/%d: sched on q %d pollms %d\n",
- ep->dev->x, ep->x, q, ep->pollms);
- qunlock(ub->tree);
- return 0;
- }
- static void
- unschedendpt(Ctlr *ub, Endpt *ep, int dirin)
- {
- int q;
- ED *prev, *this, *next;
- Endptx *epx;
- epx = ep->private;
- if((q = ep->sched) < 0)
- return;
- qlock(ub->tree);
- ub->tree->bw[q] -= ep->bw;
- prev = ub->tree->root[q];
- this = EDgetnext(prev);
- while(this != nil && this != epx->ed){
- prev = this;
- this = EDgetnext(this);
- }
- if(this == nil)
- print("unschedendpt %d %d: not found\n", dirin, q);
- else{
- next = EDgetnext(this);
- EDsetnext(prev, next);
- }
- qunlock(ub->tree);
- }
- /* at entry, *e is partly populated */
- static void
- epalloc(Usbhost *uh, Endpt *ep)
- {
- int id;
- Endptx *epx;
- Ctlr *ctlr;
- Udev *d;
- TD *dtd;
- XEPRINT("ohci: epalloc from devusb\n");
- ctlr = uh->ctlr;
- id = ep->id;
- d = ep->dev;
- epx = malloc(sizeof(Endptx));
- memset(epx, 0, sizeof(Endptx));
- ep->private = epx;
- dtd = nil;
- if(waserror()){
- XEPRINT("ohci: epalloc error\n");
- EDfree(ctlr, epx->ed);
- epx->ed = nil;
- TDfree(ctlr, dtd);
- nexterror();
- }
- if(epx->ed)
- error("usb: already allocated");
- if((epx->ed = EDalloc(ctlr)) == nil)
- error(Enomem);
- ep->bw = 1; /* all looks the same currently */
- if((dtd = TDalloc(ctlr, ep, 0)) == nil)
- error(Enomem);
- EDinit(epx->ed, ep->maxpkt, 0, 0, 0, 0, id, d->id, dtd, dtd, 0, 0, 0);
- XEPRINT("ohci: epalloc done\n");
- poperror();
- }
- static void
- epfree(Usbhost *uh, Endpt *ep)
- {
- Endptx *epx;
- Ctlr *ctlr;
- epx = ep->private;
- ctlr = uh->ctlr;
- XEPRINT("ohci: epfree %d/%d from devusb\n", ep->dev->x, ep->x);
- if(ep->active)
- panic("epfree: active");
- EDfree(ctlr, epx->ed);
- epx->ed = nil;
- free(epx);
- ep->private = nil;
- }
- static void
- epopen(Usbhost *uh, Endpt *ep)
- {
- Ctlr *ctlr;
- XEPRINT("ohci: epopen %d/%d from devusb\n", ep->dev->x, ep->x);
- ctlr = uh->ctlr;
- if((ep->epmode == Isomode || ep->epmode == Intrmode) && ep->active)
- error("already open");
- eptactivate(ctlr, ep);
- }
- static int
- setfrnum(Ctlr *ub, Endpt *ep)
- {
- short frnum, d;
- static int adj;
- /* adjust frnum as necessary... */
- frnum = ub->base->fmnumber + (ep->buffered*1000)/ep->bw;
- d = frnum - ep->frnum;
- if(d < -100 || d > 100){
- /* We'd play in the past */
- if(0 && d > 1000)
- /* We're more than a second off: */
- print("d %d, done %d, started %d, buffered %d\n", d,
- ep->dir[Dirout].xdone, ep->dir[Dirout].xstarted,
- ep->buffered);
- if(ep->dir[Dirout].xdone == ep->dir[Dirout].xstarted)
- ep->buffered = adj = 0;
- if(0 && (adj++ & 0xff) == 0)
- print("adj %d %d\n", d, ep->buffered);
- ep->frnum = ub->base->fmnumber + 10 + (ep->buffered*1000)/ep->bw;
- ep->partial = 0;
- return 1;
- }
- return 0;
- }
- static int
- ceptdone(void *arg)
- {
- Endpt *ep;
- ep = arg;
- return ep->dir[Dirout].xdone - ep->dir[Dirout].xstarted >= 0
- || ep->dir[Dirout].err;
- }
- static void
- epclose(Usbhost *uh, Endpt *ep)
- {
- Ctlr *ctlr;
- int xdone, part;
- Endptx *epx;
- XEPRINT("ohci: epclose %d/%d from devusb, %d buffered\n",
- ep->dev->x, ep->x, ep->buffered);
- ctlr = uh->ctlr;
- epx = ep->private;
- if(ep->epmode == Isomode && ep->active){
- qlock(&ep->wlock);
- if(ep->partial && setfrnum(ctlr, ep) == 0){
- part = ep->partial;
- memset(ep->bpartial->wp, 0, ep->maxpkt - ep->partial);
- ep->bpartial->wp = ep->bpartial->rp + ep->maxpkt;
- qtd(uh->ctlr, ep, Dirout, nil, ep->bpartial->rp,
- ep->bpartial->wp, Otokout, TD_FLAGS_LAST);
- XEPRINT("epclose: wrote partial block %d\n", part);
- ep->partial = 0;
- }
- qunlock(&ep->wlock);
- XEPRINT("epclose: wait for outstanding TDs, xdone %d"
- ", xstarted %d, buffered %d, queued %d\n",
- ep->dir[Dirout].xdone, ep->dir[Dirout].xstarted,
- ep->buffered, ep->dir[Dirout].queued);
- while(ep->dir[Dirout].err == nil
- && (xdone = ep->dir[Dirout].xdone) - ep->dir[Dirout].xstarted < 0){
- tsleep(&ep->dir[Dirout].rend, ceptdone, ep, 500);
- if(xdone == ep->dir[Dirout].xdone){
- print("no progress\n");
- break;
- }
- }
- if(ep->dir[Dirout].err)
- XEPRINT("error: %s\n", ep->dir[Dirout].err);
- if(ep->buffered)
- XEPRINT("epclose: done waiting, xdone %d, xstarted %d, "
- "buffered %d, queued %d\n",
- ep->dir[Dirout].xdone, ep->dir[Dirout].xstarted,
- ep->buffered, ep->dir[Dirout].queued);
- }
- lock(epx);
- EDcancel(ctlr, epx->ed, 2);
- unlock(epx);
- if(ep->epmode == Isomode && ep->buffered)
- XEPRINT("epclose: after cancelling, xdone %d, xstarted %d"
- ", buffered %d, queued %d\n",
- ep->dir[Dirout].xdone, ep->dir[Dirout].xstarted,
- ep->buffered, ep->dir[Dirout].queued);
- eptdeactivate(ctlr, ep);
- }
- static void
- epmaxpkt(Usbhost *, Endpt *ep)
- {
- Endptx *epx;
- epx = ep->private;
- XEPRINT("ohci: epmaxpkt %d/%d: %d\n",
- ep->dev->x, ep->x, ep->maxpkt);
- EDsetMPS(epx->ed, ep->maxpkt);
- }
- static void
- epmode(Usbhost *uh, Endpt *ep)
- {
- int tok, reactivate;
- Ctlr *ctlr;
- Endptx *epx;
- epx = ep->private;
- ctlr = uh->ctlr;
- XEPRINT("ohci: epmode %d/%d %s → %s\n",
- ep->dev->x, ep->x, usbmode[ep->epmode], usbmode[ep->epnewmode]);
- reactivate = 0;
- if(ep->epnewmode != ep->epmode)
- if(reactivate = ep->active){
- XEPRINT("ohci: epmode %d/%d: already open\n",
- ep->dev->x, ep->x);
- eptdeactivate(ctlr, ep);
- }
- EDsetS(epx->ed, ep->dev->speed);
- switch(ep->epnewmode){
- default:
- panic("devusb is sick");
- case Intrmode:
- // ep->debug++;
- ep->bw = ep->maxpkt*1000/ep->pollms; /* bytes/sec */
- XEPRINT("ohci: epmode %d/%d %s, intr: maxpkt %d, pollms %d, bw %ld\n",
- ep->dev->x, ep->x, ousbmode[ep->mode],
- ep->maxpkt, ep->pollms, ep->bw);
- break;
- case Isomode:
- // ep->debug++;
- ep->rem = 999;
- switch(ep->mode){
- default:
- panic("ep mode");
- case ORDWR:
- error("iso unidirectional only");
- case OREAD:
- tok = Otokin;
- error("iso read not implemented");
- break;
- case OWRITE:
- tok = Otokout;
- break;
- }
- XEPRINT("ohci: epmode %d/%d %s, iso: maxpkt %d, pollms %d, hz %d, samp %d\n",
- ep->dev->x, ep->x, ousbmode[ep->mode],
- ep->maxpkt, ep->pollms, ep->hz, ep->samplesz);
- ep->bw = ep->hz * ep->samplesz; /* bytes/sec */
- /* Use Iso TDs: */
- epx->ed->ctrl |= ED_F_BIT;
- /* Set direction in ED, no room in an Iso TD for this */
- epx->ed->ctrl &= ~(ED_D_MASK << ED_D_SHIFT);
- epx->ed->ctrl |= tok << ED_D_SHIFT;
- break;
- case Bulkmode:
- // ep->debug++;
- /*
- * Each Bulk device gets a queue head hanging off the
- * bulk queue head
- */
- break;
- case Ctlmode:
- break;
- }
- ep->epmode = ep->epnewmode;
- epmaxpkt(uh, ep);
- if(reactivate){
- XEPRINT("ohci: epmode %d/%d: reactivate\n", ep->dev->x, ep->x);
- eptactivate(ctlr, ep);
- }
- }
- static long
- qtd(Ctlr *ub, Endpt *ep, int dirin , Block *bp, uchar *base, uchar *limit,
- int pid, ulong flags)
- {
- int fc, mps;
- ulong x;
- uchar *p;
- ED *ed;
- Endptx *epx;
- TD *dummytd, *td;
- epx = ep->private;
- ed = epx->ed;
- td = hcva2ucva(ed->tail);
- td->flags = flags;
- if(ep->epmode == Isomode){
- x = va2hcva(base);
- td->cbp = x & ~0xfff;
- x &= 0xfff;
- p = base;
- setfrnum(ub, ep);
- td->ctrl = ep->frnum & 0xffff;
- fc = 0;
- for(;;){
- /* Calculate number of samples in next packet */
- mps = (ep->hz + ep->rem)/1000;
- /* rem is the partial sample left over */
- ep->rem += ep->hz - 1000*mps;
- mps *= ep->samplesz;
- if(mps > ep->maxpkt)
- panic("Packet size");
- if(ep->partial == 0 && mps > limit - p){
- /* Save this data for later ... */
- ep->partial = limit - p;
- if(fc-- == 0)
- return p - base; /* No TD */
- /* We do have a TD, send this one off normally */
- td->flags |= TD_FLAGS_LAST;
- break;
- }else if(mps >= limit - p){
- td->flags |= TD_FLAGS_LAST;
- mps = limit - p;
- ep->partial = 0;
- }
- td->offsets[fc] = 0xe000 | x;
- x += mps;
- p += mps;
- ep->frnum++;
- if(fc == 7 || limit - p == 0)
- break;
- fc++;
- }
- td->ctrl |= fc << 24;
- }else{
- td->cbp = va2hcva(base);
- td->ctrl = (pid & TD_DP_MASK) << TD_DP_SHIFT;
- p = base;
- mps = 0x2000 - ((ulong)p & 0xfff);
- if(mps > ep->maxpkt)
- mps = ep->maxpkt;
- if(mps >= limit - p){
- mps = limit - base;
- td->flags |= TD_FLAGS_LAST;
- }
- p += mps;
- }
- td->be = va2hcva(p == nil? nil: p - 1);
- td->ep = ep;
- td->bytes = p - base;
- ep->buffered += td->bytes;
- td->bp = bp;
- if(td->flags & TD_FLAGS_LAST)
- ep->dir[dirin].xstarted++;
- if(dirin == Dirout && bp)
- _xinc(&bp->ref);
- dummytd = TDalloc(ub, ep, 1);
- TDsetnexttd(td, dummytd);
- ep->dir[dirin].queued++;
- EDsettail(ed, dummytd);
- if(usbhdebug || ep->debug)
- dumptd(td, "qtd: before");
- kickappropriatequeue(ub, ep, dirin);
- return p - base;
- }
- Block*
- allocrcvb(long size)
- {
- Block *b;
- int asize;
- asize = ROUND(size, dcls) + dcls - 1;
- /*
- * allocate enough to align rp to dcls, and have an integral number
- * of cache lines in the buffer
- */
- while(waserror())
- tsleep(&up->sleep, return0, 0, 100);
- b = allocb(asize);
- poperror();
- /*
- * align the rp and wp
- */
- b->rp = b->wp = (uchar *)ROUND((ulong)b->rp, dcls);
- /*
- * invalidate the cache lines which enclose the buffer
- */
- if(IOCACHED){
- uchar *p;
- p = b->rp;
- while(size > 0){
- invalidatedcacheva((ulong)p);
- p += dcls;
- size -= dcls;
- }
- }
- return b;
- }
- /*
- * build the periodic scheduling tree:
- * framesize must be a multiple of the tree size
- */
- static QTree *
- mkqhtree(Ctlr *ub)
- {
- int i, n, d, o, leaf0, depth;
- ED **tree;
- QTree *qt;
- depth = flog2(32);
- n = (1 << (depth+1)) - 1;
- qt = mallocz(sizeof(*qt), 1);
- if(qt == nil)
- return nil;
- qt->nel = n;
- qt->depth = depth;
- qt->bw = mallocz(n * sizeof(qt->bw), 1);
- if(qt->bw == nil){
- free(qt);
- return nil;
- }
- tree = mallocz(n * sizeof(ED *), 1);
- if(tree == nil){
- free(qt->bw);
- free(qt);
- return nil;
- }
- for(i = 0; i < n; i++)
- if((tree[i] = EDalloc(ub)) == nil)
- break;
- if(i < n){
- int j;
- for(j = 0; j < i; j++)
- EDfree(ub, tree[j]);
- free(tree);
- free(qt->bw);
- free(qt);
- return nil;
- }
- qt->root = tree;
- EDinit(qt->root[0], 8, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0);
- for(i = 1; i < n; i++)
- EDinit(tree[i], 8, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, tree[(i-1)/2]);
- /* distribute leaves evenly round the frame list */
- leaf0 = n / 2;
- for(i = 0; i < 32; i++){
- o = 0;
- for(d = 0; d < depth; d++){
- o <<= 1;
- if(i & (1 << d))
- o |= 1;
- }
- if(leaf0 + o >= n){
- print("leaf0=%d o=%d i=%d n=%d\n", leaf0, o, i, n);
- break;
- }
- ub->uchcca->intrtable[i] = va2hcva(tree[leaf0 + o]);
- }
- return qt;
- }
- static void
- portreset(Usbhost *uh, int port)
- {
- Ctlr *ctlr;
- XIPRINT("ohci: portreset(port %d) from devusb\n", port);
- ctlr = uh->ctlr;
- /* should check that device not being configured on other port? */
- qlock(&ctlr->resetl);
- if(waserror()){
- qunlock(&ctlr->resetl);
- nexterror();
- }
- ilock(ctlr);
- ctlr->base->rhportsts[port - 1] = Spp | Spr;
- while((ctlr->base->rhportsts[port - 1] & Prsc) == 0){
- iunlock(ctlr);
- XIPRINT("ohci: portreset, wait for reset complete\n");
- ilock(ctlr);
- }
- ctlr->base->rhportsts[port - 1] = Prsc;
- iunlock(ctlr);
- poperror();
- qunlock(&ctlr->resetl);
- }
- static void
- portenable(Usbhost *uh, int port, int on)
- {
- Ctlr *ctlr;
- XIPRINT("ohci: portenable(port %d, on %d) from devusb\n", port, on);
- ctlr = uh->ctlr;
- /* should check that device not being configured on other port? */
- qlock(&ctlr->resetl);
- if(waserror()){
- qunlock(&ctlr->resetl);
- nexterror();
- }
- ilock(ctlr);
- if(on)
- ctlr->base->rhportsts[port - 1] = Spe | Spp;
- else
- ctlr->base->rhportsts[port - 1] = Cpe;
- iunlock(ctlr);
- poperror();
- qunlock(&ctlr->resetl);
- }
- static int
- getportstatus(Ctlr *ub, int port)
- {
- int v;
- ulong ohcistatus;
- ohcistatus = ub->base->rhportsts[port - 1];
- v = 0;
- if(ohcistatus & Ccs)
- v |= DevicePresent;
- if(ohcistatus & Pes)
- v |= PortEnable;
- if(ohcistatus & Pss)
- v |= Suspend;
- if(ohcistatus & Prs)
- v |= PortReset;
- else {
- /* port is not in reset; these potential writes are ok */
- if(ohcistatus & Csc){
- /* TODO: could notify usbd equivalent here */
- v |= ConnectStatusChange;
- ub->base->rhportsts[port - 1] = Csc;
- }
- if(ohcistatus & Pesc){
- /* TODO: could notify usbd equivalent here */
- v |= PortEnableChange;
- ub->base->rhportsts[port - 1] = Pesc;
- }
- }
- if(ohcistatus & Lsda)
- v |= SlowDevice;
- if(ohcistatus & Ccs)
- XIPRINT("portstatus(%d) = OHCI %#.8lux UHCI %#.8ux\n",
- port, ohcistatus, v);
- return v;
- }
- /* print any interesting stuff here for debugging purposes */
- static void
- usbdebug(Usbhost *uh, char *s, char *se)
- {
- Udev *dev;
- Endpt *ep;
- int n, i, j;
- n = 0;
- for(i = 0; i < MaxUsbDev; i++)
- if(uh->dev[i])
- n++;
- s = seprint(s, se, "OHCI, %d devices\n", n);
- for(i = 0; i < MaxUsbDev; i++){
- if((dev = uh->dev[i]) == nil)
- continue;
- s = seprint(s, se, "dev %#6.6lux, %d epts\n", dev->csp, dev->npt);
- for(j = 0; j < nelem(dev->ep); j++){
- if((ep = dev->ep[j]) == nil)
- continue;
- if(ep->epmode >= 0 && ep->epmode < Nmodes)
- s = seprint(s, se, "ept %d/%d: %s %#6.6lux "
- "maxpkt %d %s\n",
- dev->x, ep->x, usbmode[ep->epmode],
- ep->csp, ep->maxpkt, ep->active ? "active" : "idle");
- else{
- s = seprint(s, se, "ept %d/%d: bad mode %#6.6lux\n",
- dev->x, ep->x, ep->csp);
- continue;
- }
-
- switch(ep->epmode){
- case Nomode:
- break;
- case Ctlmode:
- break;
- case Bulkmode:
- break;
- case Intrmode:
- s = seprint(s, se, "\t%d ms\n",
- ep->pollms);
- break;
- case Isomode:
- s = seprint(s, se, "\t%d ms, remain %d, "
- "partial %d, buffered %d, "
- "xdone %d, xstarted %d, err %s\n",
- ep->pollms, ep->remain, ep->partial,
- ep->buffered,
- ep->dir[ep->mode == OREAD].xdone,
- ep->dir[ep->mode == OREAD].xstarted,
- ep->dir[ep->mode == OREAD].err
- ? ep->dir[ep->mode == OREAD].err : "no");
- break;
- }
- }
- }
- }
- /* this is called several times every few seconds, possibly due to usbd */
- static void
- portinfo(Usbhost *uh, char *s, char *se)
- {
- int x, i, j;
- Ctlr *ctlr;
- XIPRINT("ohci: portinfo from devusb\n");
- ctlr = uh->ctlr;
- for(i = 1; i <= ctlr->nports; i++){
- ilock(ctlr);
- x = getportstatus(ctlr, i);
- iunlock(ctlr);
- s = seprint(s, se, "%d %ux", i, x);
- for(j = 0; j < nelem(portstatus); j++)
- if((x & portstatus[j].bit) != 0)
- s = seprint(s, se, " %s", portstatus[j].name);
- s = seprint(s, se, "\n");
- }
- }
- void
- interrupt(Ureg *, void *arg)
- {
- int dirin, cc;
- ulong ctrl, status;
- uchar *p;
- Block *bp;
- Ctlr *ub;
- Endpt *ep;
- Endptx *epx;
- TD *donetd, *nexttd;
- Usbhost *eh;
- XIPRINT("ohci: interrupt\n");
- eh = arg;
- ub = eh->ctlr;
- status = ub->base->intrsts;
- status &= ub->base->intrenable;
- status &= Oc | Rhsc | Fno
- | Ue
- | Rd | Sf | Wdh
- | So;
- if(status & Wdh){
- /* LSb of donehead has bit that says there are other interrupts */
- donetd = hcva2ucva(ub->uchcca->donehead & ~0xf);
- XIPRINT("donetd %#p\n", donetd);
- }else
- donetd = 0;
- ub->base->intrsts = status;
- status &= ~Wdh;
- while(donetd){
- ctrl = donetd->ctrl;
- ep = donetd->ep;
- bp = donetd->bp;
- donetd->bp = nil;
- epx = ep->private;
- ohciinterrupts[ep->epmode]++;
- dirin = ((ctrl >> TD_DP_SHIFT) & TD_DP_MASK) == Otokin;
- ep->buffered -= donetd->bytes;
- if(ep->epmode == Isomode){
- dirin = Dirout;
- if(ep->buffered < 0){
- print("intr: buffered %d bytes %ld\n",
- ep->buffered, donetd->bytes);
- ep->buffered = 0;
- }
- }
- cc = (ctrl >> TD_CC_SHIFT) & TD_CC_MASK;
- if((usbhdebug || ep->debug) && (cc != 0 && cc != 9)){
- print("%d/%d: cc %d frnum %#lux\n",
- ep->dev->x, ep->x, cc, ub->base->fmnumber);
- dumptd(donetd, "after");
- }
- switch(cc){
- case 8: /* Overrun, Not an error */
- epx->overruns++;
- /* fall through to no error code */
- case 0: /* noerror */
- if((donetd->flags & TD_FLAGS_LAST) == 0)
- break;
- if(dirin){
- if(bp){
- p = hcva2va(donetd->be + 1);
- if(p < bp->wp)
- print("interrupt: bp: rp %#p"
- ", wp %#p→%#p\n",
- bp->rp, bp->wp, p);
- bp->wp = p;
- }
- }
- ep->dir[dirin].xdone++;
- wakeup(&ep->dir[dirin].rend);
- break;
- case 9: /* underrun */
- if(bp){
- p = hcva2va(donetd->cbp);
- XEIPRINT("interrupt: bp: rp %#p, wp "
- "%#p→%#p\n", bp->rp, bp->wp, p);
- bp->wp = p;
- }
- if((donetd->flags & TD_FLAGS_LAST) == 0){
- XEIPRINT("Underrun\n");
- ep->dir[dirin].err = Eunderrun;
- }
- ep->dir[dirin].xdone++;
- wakeup(&ep->dir[dirin].rend);
- break;
- case 1: /* CRC */
- ep->dir[dirin].err = "CRC error";
- goto error;
- case 2: /* Bitstuff */
- ep->dir[dirin].err = "Bitstuff error";
- goto error;
- case 3:
- ep->dir[dirin].err = "data toggle mismatch";
- goto error;
- case 4: /* Stall */
- ep->dir[dirin].err = Estalled;
- goto error;
- case 5: /* No response */
- ep->dir[dirin].err = "No response";
- goto error;
- case 6: /* PIDcheck */
- ep->dir[dirin].err = "PIDcheck";
- goto error;
- case 7: /* UnexpectedPID */
- ep->dir[dirin].err = "badPID";
- goto error;
- error:
- XEPRINT("fail %d (%lud)\n", cc,
- (ctrl >> TD_EC_SHIFT) & TD_EC_MASK);
- ep->dir[dirin].xdone++;
- wakeup(&ep->dir[dirin].rend);
- break;
- default:
- panic("cc %ud unimplemented", cc);
- }
- ep->dir[dirin].queued--;
- /* Clean up blocks used for transfers */
- if(dirin == Dirout)
- freeb(bp);
- nexttd = TDgetnexttd(donetd);
- TDfree(ub, donetd);
- donetd = nexttd;
- }
- if(status & Sf){
- if (0)
- XIPRINT(("sof!!\n"));
- // wakeup(&ub->sofr); /* sofr doesn't exist anywhere! */
- status &= ~Sf;
- }
- if(status & Ue){
- ulong curred;
- // usbhdbg(); /* TODO */
- curred = ub->base->periodcurred;
- print("usbh: unrecoverable error frame %#.8lux ed %#.8lux, "
- "ints %d %d %d %d\n",
- ub->base->fmnumber, curred,
- ohciinterrupts[1], ohciinterrupts[2],
- ohciinterrupts[3], ohciinterrupts[4]);
- if(curred)
- dumped(hcva2ucva(curred));
- }
- if(status)
- IPRINT(("interrupt: unhandled interrupt %#.8lux\n", status));
- }
- static void
- usbhattach(Ctlr *ub) /* TODO: is unused now, but it fiddles ctlr */
- {
- ulong ctrl;
- if(ub == nil || ub->base == 0)
- error(Enodev);
- ctrl = ub->base->control;
- if((ctrl & HcfsMask) != HcfsOperational){
- ctrl = (ctrl & ~HcfsMask) | HcfsOperational;
- ub->base->control = ctrl;
- ub->base->rhsts = Sgp;
- }
- }
- static int
- reptdone(void *arg)
- {
- Endpt *ep;
- ep = arg;
- return ep->dir[Dirin].err
- /* Expression crafted to deal with wrap around: */
- || ep->dir[Dirin].xdone - ep->dir[Dirin].xstarted >= 0;
- }
- Block *
- breadusbh(Ctlr *ub, Endpt *ep, long n) /* guts of read() */
- {
- long in, l;
- uchar *p;
- Block *bp;
- Endptx *epx;
- epx = ep->private;
- qlock(&ep->rlock);
- EDsetC(epx->ed, ep->rdata01);
- XEPRINT("breadusbh(%d/%d, %ld, dt %d)\n", ep->dev->x, ep->x, n, ep->rdata01);
- eptenable(ub, ep, Dirin);
- if(waserror()){
- EDcancel(ub, epx->ed, Dirin);
- ep->dir[Dirin].err = nil;
- qunlock(&ep->rlock);
- nexterror();
- }
- if(ep->dir[Dirin].err != nil)
- error("usb: can't happen");
- bp = allocrcvb(n);
- in = n;
- if(in > bp->lim - bp->wp){
- print("usb: read larger than block\n");
- in = bp->lim - bp->wp;
- }
- p = bp->rp;
- do{
- l = qtd(ub, ep, Dirin, bp, p, p+in, Otokin, 0);
- p += l;
- in -= l;
- }while(in > 0);
- sleep(&ep->dir[Dirin].rend, reptdone, ep);
- if(ep->dir[Dirin].err){
- EDcancel(ub, epx->ed, Dirin);
- if(ep->dir[Dirin].err == Eunderrun)
- ep->dir[Dirin].err = nil;
- else
- error(ep->dir[Dirin].err);
- }
- XEPRINT("breadusbh(%d/%d, %ld) returned %ld\n", ep->dev->x, ep->x, n,
- BLEN(bp));
- poperror();
- qunlock(&ep->rlock);
- ep->rdata01 = EDgetC(epx->ed);
- return bp;
- }
- static long
- read(Usbhost *uh, Endpt *ep, void *a, long n, vlong off) /* TODO off */
- {
- long l;
- Block *bp;
- Ctlr *ub;
- XEPRINT("ohci: read from devusb\n");
- USED(off);
- ub = uh->ctlr;
- XEPRINT("%d/%d: read %#p %ld\n", ep->dev->x, ep->x, a, n);
- bp = breadusbh(ub, ep, n);
- l = BLEN(bp);
- memmove(a, bp->rp, l);
- printdata(bp->rp, 1, l);
- XEPRINT("ohci: read %ld\n\n", l);
- freeb(bp);
- return l;
- }
- static int
- weptdone(void *arg)
- {
- Endpt *ep;
- ep = arg;
- /*
- * success when all operations are done or when less than
- * a second is buffered in iso connections
- */
- return ep->dir[Dirout].xdone - ep->dir[Dirout].xstarted >= 0
- || (ep->epmode == Isomode && ep->buffered <= ep->bw)
- || ep->dir[Dirout].err;
- }
- /* TODO: honour off */
- static long
- write(Usbhost *uh, Endpt *ep, void *a, long n, vlong off, int tok)
- {
- long m;
- short frnum;
- uchar *p = a;
- Block *b;
- Ctlr *ub;
- Endptx *epx;
- XEPRINT("ohci: write(addr %p, bytes %ld, off %lld, tok %d) from devusb\n",
- a, n, off, tok);
- epx = ep->private;
- ub = uh->ctlr;
- qlock(&ep->wlock);
- XEPRINT("%d/%d: write %#p %ld %s\n", ep->dev->x, ep->x, a, n,
- tok == Otoksetup? "setup": "out");
- if(ep->dir[Dirout].xdone - ep->dir[Dirout].xstarted > 0){
- print("done > started, %d %d\n",
- ep->dir[Dirout].xdone, ep->dir[Dirout].xstarted);
- ep->dir[Dirout].xdone = ep->dir[Dirout].xstarted;
- }
- if(waserror()){
- lock(epx);
- EDcancel(ub, epx->ed, Dirout);
- unlock(epx);
- ep->dir[Dirout].err = nil;
- qunlock(&ep->wlock);
- nexterror();
- }
- eptenable(ub, ep, Dirout);
- EDsetC(epx->ed, ep->wdata01);
- if(ep->dir[Dirout].err)
- error(ep->dir[Dirout].err);
- if((m = n) == 0 || p == nil)
- qtd(ub, ep, Dirout, 0, 0, 0, tok, TD_FLAGS_LAST);
- else{
- b = allocb(m+ep->partial);
- if(ep->partial){
- memmove(b->wp, ep->bpartial->rp, ep->partial);
- b->wp += ep->partial;
- ep->partial = 0;
- }
- validaddr((uintptr)p, m, 0); /* DEBUG */
- memmove(b->wp, a, m);
- b->wp += m;
- printdata(b->rp, 1, m);
- m = BLEN(b);
- dcclean(b->rp, m);
- if(ep->epmode == Isomode && ep->buffered <= ep->bw<<1){
- sleep(&ep->dir[Dirout].rend, weptdone, ep);
- if(ep->dir[Dirout].err) {
- freeb(b);
- error(ep->dir[Dirout].err);
- }
- }
- while(m > 0){
- int l;
- l = qtd(ub, ep, Dirout, b, b->rp, b->wp, tok, 0);
- b->rp += l;
- m -= l;
- tok = Otokout;
- if(ep->partial){
- /* We have some data to save */
- if(ep->bpartial == nil)
- ep->bpartial = allocb(ep->maxpkt);
- if(ep->partial != m)
- print("curious: %d != %ld\n",
- ep->partial, m);
- memmove(ep->bpartial->rp, b->rp, ep->partial);
- ep->bpartial->wp = ep->bpartial->rp + ep->partial;
- break;
- }
- }
- freeb(b); /* qtd calls incref; this undoes the one too many */
- }
- if(ep->epmode != Isomode){
- sleep(&ep->dir[Dirout].rend, weptdone, ep);
- if(ep->dir[Dirout].err)
- error(ep->dir[Dirout].err);
- }else if(0 && (frnum = ep->frnum - ub->base->fmnumber) < 0)
- print("too late %d\n", frnum);
- poperror();
- qunlock(&ep->wlock);
- XEPRINT("ohci: wrote %ld\n\n", n);
- ep->wdata01 = EDgetC(epx->ed);
- return n;
- }
- static void
- init(Usbhost*)
- {
- XIPRINT("ohci: init from devusb\n");
- }
- static void
- scanpci(void)
- {
- ulong mem;
- Ctlr *ctlr;
- Pcidev *p;
- static int already = 0;
- if(already)
- return;
- already = 1;
- p = nil;
- while(p = pcimatch(p, 0, 0)) {
- /*
- * Find OHCI controllers (Programming Interface = 0x10).
- */
- if(p->ccrb != Pcibcserial || p->ccru != Pciscusb ||
- p->ccrp != 0x10)
- continue;
- mem = p->mem[0].bar & ~0x0F;
- XPRINT("usbohci: %x/%x port %#lux size %#x irq %d\n",
- p->vid, p->did, mem, p->mem[0].size, p->intl);
- if(mem == 0){
- print("usbohci: failed to map registers\n");
- continue;
- }
- if(p->intl == 0xFF || p->intl == 0) {
- print("usbohci: no irq assigned for port %#lux\n", mem);
- continue;
- }
- ctlr = malloc(sizeof(Ctlr));
- ctlr->pcidev = p;
- ctlr->base = vmap(mem, p->mem[0].size);
- XPRINT("scanpci: ctlr %#p, base %#p\n", ctlr, ctlr->base);
- pcisetbme(p);
- pcisetpms(p, 0);
- if(ctlrhead != nil)
- ctlrtail->next = ctlr;
- else
- ctlrhead = ctlr;
- ctlrtail = ctlr;
- }
- }
- static int
- reset(Usbhost *uh)
- {
- int i, linesize;
- ulong io, fminterval, ctrl;
- Ctlr *ctlr;
- HCCA *atmp;
- OHCI *ohci;
- Pcidev *p;
- QTree *qt;
- /*
- * data cache line size; probably doesn't matter on pc
- * except that it must be a power of 2 for xspanalloc.
- */
- dcls = 32;
- scanpci();
- /*
- * Any adapter matches if no uh->port is supplied,
- * otherwise the ports must match.
- */
- for(ctlr = ctlrhead; ctlr != nil; ctlr = ctlr->next){
- if(ctlr->active)
- continue;
- if(uh->port == 0 || uh->port == (uintptr)ctlr->base){
- ctlr->active = 1;
- break;
- }
- }
- if(ctlr == nil)
- return -1;
- io = (uintptr)ctlr->base; /* TODO: correct? */
- ohci = ctlr->base;
- XPRINT("OHCI ctlr %#p, base %#p\n", ctlr, ohci);
- p = ctlr->pcidev;
- uh->ctlr = ctlr;
- uh->port = io;
- uh->irq = p->intl;
- uh->tbdf = p->tbdf;
- XPRINT("OHCI revision %ld.%ld\n", (ohci->revision >> 4) & 0xf,
- ohci->revision & 0xf);
- XPRINT("Host revision %ld.%ld\n", (ohci->hostrevision >> 4) & 0xf,
- ohci->hostrevision & 0xf);
- ctlr->nports = ohci->rhdesca & 0xff;
- XPRINT("HcControl %#.8lux, %d ports\n", ohci->control, ctlr->nports);
- delay(100); /* anything greater than 50 should ensure reset is done */
- if(ohci->control == ~0){
- ctlrhead = nil;
- return -1;
- }
- /*
- * usually enter here in reset, wait till its through,
- * then do our own so we are on known timing conditions.
- */
- ohci->control = 0;
- delay(100);
- fminterval = ohci->fminterval;
- /* legacy support register: turn off lunacy mode */
- pcicfgw16(p, 0xc0, 0x2000);
- /*
- * transfer descs need at least 16 byte alignment, but
- * align to dcache line size since the access will always be uncached.
- * linesize must be a power of 2 for xspanalloc.
- */
- linesize = dcls;
- if(linesize < 0x20)
- linesize = 0x20;
- ctlr->td.pool = va2ucva(xspanalloc(Ntd * sizeof(TD), linesize, 0));
- if(ctlr->td.pool == nil)
- panic("usbohci: no memory for TD pool");
- for(i = Ntd - 1; --i >= 0;){
- ctlr->td.pool[i].next = ctlr->td.free;
- ctlr->td.free = &ctlr->td.pool[i];
- }
- ctlr->td.alloced = 0;
- ctlr->ed.pool = va2ucva(xspanalloc(Ned*sizeof(ED), linesize, 0));
- if(ctlr->ed.pool == nil)
- panic("usbohci: no memory for ED pool");
- for(i = Ned - 1; --i >= 0;){
- ctlr->ed.pool[i].next = (ulong)ctlr->ed.free;
- ctlr->ed.free = &ctlr->ed.pool[i];
- }
- ctlr->ed.alloced = 0;
- atmp = xspanalloc(sizeof(HCCA), 256, 0);
- if(atmp == nil)
- panic("usbhreset: no memory for HCCA");
- memset(atmp, 0, sizeof(*atmp));
- ctlr->uchcca = atmp;
- qt = mkqhtree(ctlr);
- if(qt == nil){
- panic("usb: can't allocate scheduling tree");
- return -1;
- }
- ctlr->tree = qt;
- ctlr->base = ohci;
- /* time to move to rest then suspend mode. */
- ohci->cmdsts = 1; /* reset the block */
- while(ohci->cmdsts == 1)
- continue; /* wait till reset complete, OHCI says 10us max. */
- /*
- * now that soft reset is done we are in suspend state.
- * Setup registers which take in suspend state
- * (will only be here for 2ms).
- */
- ohci->hcca = va2hcva(ctlr->uchcca);
- OHCIsetControlHeadED(ctlr->base, 0);
- ctlr->base->ctlcurred = 0;
- OHCIsetBulkHeadED(ctlr->base, 0);
- ctlr->base->bulkcurred = 0;
- ohci->intrenable = Mie | Wdh | Ue;
- ohci->control |= Cle | Ble | Ple | Ie | HcfsOperational;
- /* set frame after operational */
- ohci->fminterval = (fminterval &
- ~(HcFmIntvl_FSMaxpack_MASK << HcFmIntvl_FSMaxpack_SHIFT)) |
- 5120 << HcFmIntvl_FSMaxpack_SHIFT;
- ohci->rhdesca = 1 << 9;
- for(i = 0; i < ctlr->nports; i++)
- ohci->rhportsts[i] = Spp | Spr;
- delay(100);
- ctrl = ohci->control;
- if((ctrl & HcfsMask) != HcfsOperational){
- XIPRINT("ohci: reset, take ctlr out of Suspend\n");
- ctrl = (ctrl & ~HcfsMask) | HcfsOperational;
- ohci->control = ctrl;
- ohci->rhsts = Sgp;
- }
- p = ctlr->pcidev;
- ctlr->irq = p->intl;
- ctlr->tbdf = p->tbdf;
- /*
- * Linkage to the generic USB driver.
- */
- uh->init = init;
- uh->interrupt = interrupt;
- uh->debug = usbdebug;
- uh->portinfo = portinfo;
- uh->portreset = portreset;
- uh->portenable = portenable;
- uh->epalloc = epalloc;
- uh->epfree = epfree;
- uh->epopen = epopen;
- uh->epclose = epclose;
- uh->epmode = epmode;
- uh->epmaxpkt = epmaxpkt;
- uh->read = read;
- uh->write = write;
- uh->tokin = Otokin;
- uh->tokout = Otokout;
- uh->toksetup = Otoksetup;
- return 0;
- }
- void
- usbohcilink(void)
- {
- addusbtype("ohci", reset);
- }
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