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usbehci: portreset timing

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assert port reset for 50ms, not 10ms.
This commit is contained in:
cinap_lenrek 2013-08-30 16:00:03 +02:00
parent f459320bb4
commit f104cc9d79
1 changed files with 6 additions and 5 deletions
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11
sys/src/9/port/usbehci.c
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@ -1692,19 +1692,20 @@ portreset(Hci *hp, int port, int on)
ctlr->capio);
*portscp = (*portscp & ~Psenable) | Psreset; /* initiate reset */
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(50);
*portscp &= ~Psreset; /* terminate reset */
delay(10);
for(i = 0; *portscp & Psreset && i < 10; i++)
delay(10);
if (*portscp & Psreset)
iprint("ehci %#p: port %d didn't reset within %d ms; sts %#lux\n",
ctlr->capio, port, i * 10, *portscp);
iprint("ehci %#p: port %d didn't reset; sts %#lux\n",
ctlr->capio, port, *portscp);
delay(10); /* ehci spec: enable within 2 ms. */
if((*portscp & Psenable) == 0)