diff options
Diffstat (limited to 'drivers/usb/host/ohci-hcd.c')
| -rw-r--r-- | drivers/usb/host/ohci-hcd.c | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 9be6b303e78..a95275a401b 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -715,13 +715,6 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd) return IRQ_NOTMINE; } - if (ints & OHCI_INTR_RHSC) { - ohci_vdbg (ohci, "rhsc\n"); - ohci->next_statechange = jiffies + STATECHANGE_DELAY; - ohci_writel (ohci, OHCI_INTR_RHSC, ®s->intrstatus); - usb_hcd_poll_rh_status(hcd); - } - if (ints & OHCI_INTR_UE) { disable (ohci); ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n"); @@ -731,9 +724,31 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd) ohci_usb_reset (ohci); } - if (ints & OHCI_INTR_RD) { - ohci_vdbg (ohci, "resume detect\n"); - ohci_writel (ohci, OHCI_INTR_RD, ®s->intrstatus); + if (ints & OHCI_INTR_RHSC) { + ohci_vdbg(ohci, "rhsc\n"); + ohci->next_statechange = jiffies + STATECHANGE_DELAY; + ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC, + ®s->intrstatus); + + /* NOTE: Vendors didn't always make the same implementation + * choices for RHSC. Many followed the spec; RHSC triggers + * on an edge, like setting and maybe clearing a port status + * change bit. With others it's level-triggered, active + * until khubd clears all the port status change bits. We'll + * always disable it here and rely on polling until khubd + * re-enables it. + */ + ohci_writel(ohci, OHCI_INTR_RHSC, ®s->intrdisable); + usb_hcd_poll_rh_status(hcd); + } + + /* For connect and disconnect events, we expect the controller + * to turn on RHSC along with RD. But for remote wakeup events + * this might not happen. + */ + else if (ints & OHCI_INTR_RD) { + ohci_vdbg(ohci, "resume detect\n"); + ohci_writel(ohci, OHCI_INTR_RD, ®s->intrstatus); hcd->poll_rh = 1; if (ohci->autostop) { spin_lock (&ohci->lock); |