ref: 5030157da9e89da53739b13c36942a5355de669f
dir: /sys/src/9/port/usbxhcipci.c/
#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" #include "../port/pci.h" #include "../port/error.h" #include "../port/usb.h" #include "usbxhci.h" static Xhci *ctlrs[Nhcis]; static void pcidmaenable(Xhci *ctlr) { Pcidev *pcidev = ctlr->aux; pcisetbme(pcidev); } static u64int pciwaddr(void *va) { return PCIWADDR(va); } static void scanpci(void) { static int already = 0; int i; u64int io, iosize; Xhci *ctlr; Pcidev *p; u32int *mmio; if(already) return; already = 1; p = nil; while ((p = pcimatch(p, 0, 0)) != nil) { /* * Find XHCI controllers (Programming Interface = 0x30). */ if(p->ccrb != Pcibcserial || p->ccru != Pciscusb || p->ccrp != 0x30) continue; if(p->mem[0].bar & 1) continue; iosize = p->mem[0].size; if(iosize == 0) continue; io = p->mem[0].bar & ~0x0f; if(io == 0) continue; print("usbxhci: %#x %#x: port %llux size %lld irq %d\n", p->vid, p->did, io, iosize, p->intl); mmio = vmap(io, iosize); if(mmio == nil){ print("usbxhci: cannot map registers\n"); continue; } ctlr = xhcialloc(mmio, io, iosize); if(ctlr == nil){ print("usbxhci: no memory\n"); vunmap(mmio, iosize); continue; } ctlr->aux = p; ctlr->dmaenable = pcidmaenable; ctlr->dmaaddr = pciwaddr; for(i = 0; i < nelem(ctlrs); i++) if(ctlrs[i] == nil){ ctlrs[i] = ctlr; break; } if(i >= nelem(ctlrs)) print("xhci: bug: more than %d controllers\n", nelem(ctlrs)); } } static void init(Hci *hp) { Xhci *ctlr = hp->aux; Pcidev *pcidev = ctlr->aux; pcienable(pcidev); if(ctlr->mmio[0] == -1){ pcidisable(pcidev); error("controller vanished"); } xhciinit(hp); } static void shutdown(Hci *hp) { Xhci *ctlr = hp->aux; Pcidev *pcidev = ctlr->aux; xhcishutdown(hp); pcidisable(pcidev); } static int reset(Hci *hp) { Xhci *ctlr; Pcidev *pcidev; int i; if(getconf("*nousbxhci")) return -1; scanpci(); /* * Any adapter matches if no hp->port is supplied, * otherwise the ports must match. */ for(i = 0; i < nelem(ctlrs); i++){ ctlr = ctlrs[i]; if(ctlr == nil) break; if(ctlr->active == nil) if(hp->port == 0 || hp->port == ctlr->base) goto Found; } return -1; Found: pcidev = ctlr->aux; hp->irq = pcidev->intl; hp->tbdf = pcidev->tbdf; xhcilinkage(hp, ctlr); hp->init = init; hp->shutdown = shutdown; return 0; } void usbxhcipcilink(void) { addhcitype("xhci", reset); }