| Message ID | 20230423105952.4526-1-WeitaoWang-oc@zhaoxin.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v3] UHCI:adjust zhaoxin UHCI controllers OverCurrent bit value | expand |
On Sun, Apr 23, 2023 at 06:59:52PM +0800, Weitao Wang wrote: > OverCurrent condition is not standardized in the UHCI spec. > Zhaoxin UHCI controllers report OverCurrent bit active off. > In order to handle OverCurrent condition correctly, the uhci-hcd > driver needs to be told to expect the active-off behavior. > > Suggested-by: Alan Stern <stern@rowland.harvard.edu> > Cc: stable@vger.kernel.org > Signed-off-by: Weitao Wang <WeitaoWang-oc@zhaoxin.com> > --- > v2->v3 > - Change patch code style. > > drivers/usb/host/uhci-pci.c | 10 ++++++---- > 1 file changed, 6 insertions(+), 4 deletions(-) > > diff --git a/drivers/usb/host/uhci-pci.c b/drivers/usb/host/uhci-pci.c > index 3592f757fe05..7bd2fddde770 100644 > --- a/drivers/usb/host/uhci-pci.c > +++ b/drivers/usb/host/uhci-pci.c > @@ -119,11 +119,13 @@ static int uhci_pci_init(struct usb_hcd *hcd) > > uhci->rh_numports = uhci_count_ports(hcd); > > - /* Intel controllers report the OverCurrent bit active on. > - * VIA controllers report it active off, so we'll adjust the > - * bit value. (It's not standardized in the UHCI spec.) > + /* > + * Intel controllers report the OverCurrent bit active on. VIA > + * and ZHAOXIN controllers report it active off, so we'll adjust > + * the bit value. (It's not standardized in the UHCI spec.) > */ > - if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA) > + if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA || > + to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_ZHAOXIN) > uhci->oc_low = 1; > > /* HP's server management chip requires a longer port reset delay. */ Acked-by: Alan Stern <stern@rowland.harvard.edu>
diff --git a/drivers/usb/host/uhci-pci.c b/drivers/usb/host/uhci-pci.c index 3592f757fe05..7bd2fddde770 100644 --- a/drivers/usb/host/uhci-pci.c +++ b/drivers/usb/host/uhci-pci.c @@ -119,11 +119,13 @@ static int uhci_pci_init(struct usb_hcd *hcd) uhci->rh_numports = uhci_count_ports(hcd); - /* Intel controllers report the OverCurrent bit active on. - * VIA controllers report it active off, so we'll adjust the - * bit value. (It's not standardized in the UHCI spec.) + /* + * Intel controllers report the OverCurrent bit active on. VIA + * and ZHAOXIN controllers report it active off, so we'll adjust + * the bit value. (It's not standardized in the UHCI spec.) */ - if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA) + if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA || + to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_ZHAOXIN) uhci->oc_low = 1; /* HP's server management chip requires a longer port reset delay. */
OverCurrent condition is not standardized in the UHCI spec. Zhaoxin UHCI controllers report OverCurrent bit active off. In order to handle OverCurrent condition correctly, the uhci-hcd driver needs to be told to expect the active-off behavior. Suggested-by: Alan Stern <stern@rowland.harvard.edu> Cc: stable@vger.kernel.org Signed-off-by: Weitao Wang <WeitaoWang-oc@zhaoxin.com> --- v2->v3 - Change patch code style. drivers/usb/host/uhci-pci.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)