diff options
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 27291f502651..71aeca019e88 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -647,9 +647,24 @@ static int ehci_hub_control ( status |= 1 << USB_PORT_FEAT_C_CONNECTION; if (temp & PORT_PEC) status |= 1 << USB_PORT_FEAT_C_ENABLE; - if ((temp & PORT_OCC) && !ignore_oc) + + if ((temp & PORT_OCC) && !ignore_oc){ status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; + /* + * Hubs should disable port power on over-current. + * However, not all EHCI implementations do this + * automatically, even if they _do_ support per-port + * power switching; they're allowed to just limit the + * current. khubd will turn the power back on. + */ + if (HCS_PPC (ehci->hcs_params)){ + ehci_writel(ehci, + temp & ~(PORT_RWC_BITS | PORT_POWER), + status_reg); + } + } + /* whoever resumes must GetPortStatus to complete it!! */ if (temp & PORT_RESUME) { |