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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt58
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diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index e6d33fa8fed4..5ffe4c4121bd 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4392,6 +4392,64 @@
usbcore.nousb [USB] Disable the USB subsystem
+ usbcore.quirks=
+ [USB] A list of quirk entries to augment the built-in
+ usb core quirk list. List entries are separated by
+ commas. Each entry has the form
+ VendorID:ProductID:Flags. The IDs are 4-digit hex
+ numbers and Flags is a set of letters. Each letter
+ will change the built-in quirk; setting it if it is
+ clear and clearing it if it is set. The letters have
+ the following meanings:
+ a = USB_QUIRK_STRING_FETCH_255 (string
+ descriptors must not be fetched using
+ a 255-byte read);
+ b = USB_QUIRK_RESET_RESUME (device can't resume
+ correctly so reset it instead);
+ c = USB_QUIRK_NO_SET_INTF (device can't handle
+ Set-Interface requests);
+ d = USB_QUIRK_CONFIG_INTF_STRINGS (device can't
+ handle its Configuration or Interface
+ strings);
+ e = USB_QUIRK_RESET (device can't be reset
+ (e.g morph devices), don't use reset);
+ f = USB_QUIRK_HONOR_BNUMINTERFACES (device has
+ more interface descriptions than the
+ bNumInterfaces count, and can't handle
+ talking to these interfaces);
+ g = USB_QUIRK_DELAY_INIT (device needs a pause
+ during initialization, after we read
+ the device descriptor);
+ h = USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL (For
+ high speed and super speed interrupt
+ endpoints, the USB 2.0 and USB 3.0 spec
+ require the interval in microframes (1
+ microframe = 125 microseconds) to be
+ calculated as interval = 2 ^
+ (bInterval-1).
+ Devices with this quirk report their
+ bInterval as the result of this
+ calculation instead of the exponent
+ variable used in the calculation);
+ i = USB_QUIRK_DEVICE_QUALIFIER (device can't
+ handle device_qualifier descriptor
+ requests);
+ j = USB_QUIRK_IGNORE_REMOTE_WAKEUP (device
+ generates spurious wakeup, ignore
+ remote wakeup capability);
+ k = USB_QUIRK_NO_LPM (device can't handle Link
+ Power Management);
+ l = USB_QUIRK_LINEAR_FRAME_INTR_BINTERVAL
+ (Device reports its bInterval as linear
+ frames instead of the USB 2.0
+ calculation);
+ m = USB_QUIRK_DISCONNECT_SUSPEND (Device needs
+ to be disconnected before suspend to
+ prevent spurious wakeup);
+ n = USB_QUIRK_DELAY_CTRL_MSG (Device needs a
+ pause after every control message);
+ Example: quirks=0781:5580:bk,0a5c:5834:gij
+
usbhid.mousepoll=
[USBHID] The interval which mice are to be polled at.