diff options
| -rw-r--r-- | sys/src/9/port/usbehci.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/sys/src/9/port/usbehci.c b/sys/src/9/port/usbehci.c index dd6ac8820..19732dac6 100644 --- a/sys/src/9/port/usbehci.c +++ b/sys/src/9/port/usbehci.c @@ -1690,22 +1690,23 @@ portreset(Hci *hp, int port, int on) if (opio->sts & Shalted) iprint("ehci %#p: halted yet trying to reset port\n", ctlr->capio); + *portscp = (*portscp & ~Psenable) | Psreset; /* initiate reset */ - coherence(); + delay(10); + *portscp &= ~Psreset; /* * usb 2 spec: reset must finish within 20 ms. * linux says spec says it can take 50 ms. for hubs. */ + delay(10); for(i = 0; *portscp & Psreset && i < 10; i++) delay(10); if (*portscp & Psreset) - if(0) iprint("ehci %#p: port %d didn't reset within %d ms; sts %#lux\n", + iprint("ehci %#p: port %d didn't reset within %d ms; sts %#lux\n", ctlr->capio, port, i * 10, *portscp); - *portscp &= ~Psreset; /* force appearance of reset done */ - coherence(); - delay(10); /* ehci spec: enable within 2 ms. */ + delay(10); /* ehci spec: enable within 2 ms. */ if((*portscp & Psenable) == 0) portlend(ctlr, port, "full"); |