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usb: dwc_otg: add condition judgement to filter invalid

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disconnect interrupt

In some case, we disconnect a usb device, then usb controller
will trigger more the one disconnect interrupt, so check port
enable change bit in hprt0 to make sure just one disconnect
interrupt be handled.
here to

Signed-off-by: lyz <lyz@rock-chips.com>
This commit is contained in:
lyz
2015-01-27 15:53:53 +08:00
parent 1424301f3b
commit 3d2090f535
1 changed files with 5 additions and 3 deletions
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8
drivers/usb/dwc_otg_310/dwc_otg_hcd.c
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@@ -288,10 +288,12 @@ static int32_t dwc_otg_hcd_disconnect_cb(void *p)
hprt0.d32 = DWC_READ_REG32(dwc_otg_hcd->core_if->host_if->hprt0);
/* In some case, we don't disconnect a usb device, but
* disconnect intr was triggered, so check hprt0 here. */
if ((!hprt0.b.prtenchng)
if (((!hprt0.b.prtenchng)
&& (!hprt0.b.prtconndet)
&& hprt0.b.prtconnsts) {
DWC_PRINTF("%s: hprt0 = 0x%08x\n", __func__, hprt0.d32);
&& hprt0.b.prtconnsts)
|| !hprt0.b.prtenchng) {
DWC_PRINTF("%s: Invalid disconnect interrupt "
"hprt0 = 0x%08x\n", __func__, hprt0.d32);
return 1;
}
/*