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| author | Weitao Wang <WeitaoWang-oc@zhaoxin.com> | 2023-04-23 18:59:52 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-13 17:55:45 +0900 |
| commit | dddb342b5b9e482bb213aecc08cbdb201ea4f8da (patch) | |
| tree | 7ad24eb36ac10beb68b154c50371143e0d222d87 /drivers/usb | |
| parent | 4e8ef34e36f2839ef8c8da521ab7035956436818 (diff) | |
| download | linux-dddb342b5b9e482bb213aecc08cbdb201ea4f8da.tar.gz linux-dddb342b5b9e482bb213aecc08cbdb201ea4f8da.tar.bz2 linux-dddb342b5b9e482bb213aecc08cbdb201ea4f8da.zip | |
USB: UHCI: adjust zhaoxin UHCI controllers OverCurrent bit value
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>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20230423105952.4526-1-WeitaoWang-oc@zhaoxin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/uhci-pci.c | 10 |
1 files 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. */ |