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| author | Jiahau Chang <jiahau@gmail.com> | 2017-06-19 13:08:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-12 16:01:06 +0300 |
| commit | f59d04e342826cb948724ac43a570702cfc86f36 (patch) | |
| tree | 6a5ba646bc7c8bbd05db2f90df48dc6d9c58f558 /drivers/usb/host/xhci.h | |
| parent | 07379c41aeafb28e31c311f626b97868450988e1 (diff) | |
| download | linux-f59d04e342826cb948724ac43a570702cfc86f36.tar.xz | |
xhci: Limit USB2 port wake support for AMD Promontory hosts
commit dec08194ffeccfa1cf085906b53d301930eae18f upstream.
For AMD Promontory xHCI host, although you can disable USB 2.0 ports in
BIOS settings, those ports will be enabled anyway after you remove a
device on that port and re-plug it in again. It's a known limitation of
the chip. As a workaround we can clear the PORT_WAKE_BITS.
This will disable wake on connect, disconnect and overcurrent on
AMD Promontory USB2 ports
[checkpatch cleanup and commit message reword -Mathias]
Cc: Tsai Nicholas <nicholas.tsai@amd.com>
Signed-off-by: Jiahau Chang <Lars_Chang@asmedia.com.tw>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 328fe06752ec..8336e07dc5f9 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1660,6 +1660,7 @@ struct xhci_hcd { /* For controller with a broken Port Disable implementation */ #define XHCI_BROKEN_PORT_PED (1 << 25) #define XHCI_LIMIT_ENDPOINT_INTERVAL_7 (1 << 26) +#define XHCI_U2_DISABLE_WAKE (1 << 27) unsigned int num_active_eps; unsigned int limit_active_eps; |