cd83ce9e61
This patch adds a usb quirk to support devices with interupt endpoints and bInterval values expressed as microframes. The quirk causes the parse endpoint function to modify the reported bInterval to a standards conforming value. There is currently code in the endpoint parser that checks for bIntervals that are outside of the valid range (1-16 for USB 2+ high speed and super speed interupt endpoints). In this case, the code assumes the bInterval is being reported in 1ms frames. As well, the correction is only applied if the original bInterval value is out of the 1-16 range. With this quirk applied to the device, the bInterval will be accurately adjusted from microframes to an exponent. Signed-off-by: James P Michels III <james.p.michels@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/*
|
|
* This file holds the definitions of quirks found in USB devices.
|
|
* Only quirks that affect the whole device, not an interface,
|
|
* belong here.
|
|
*/
|
|
|
|
#ifndef __LINUX_USB_QUIRKS_H
|
|
#define __LINUX_USB_QUIRKS_H
|
|
|
|
/* string descriptors must not be fetched using a 255-byte read */
|
|
#define USB_QUIRK_STRING_FETCH_255 0x00000001
|
|
|
|
/* device can't resume correctly so reset it instead */
|
|
#define USB_QUIRK_RESET_RESUME 0x00000002
|
|
|
|
/* device can't handle Set-Interface requests */
|
|
#define USB_QUIRK_NO_SET_INTF 0x00000004
|
|
|
|
/* device can't handle its Configuration or Interface strings */
|
|
#define USB_QUIRK_CONFIG_INTF_STRINGS 0x00000008
|
|
|
|
/* device can't be reset(e.g morph devices), don't use reset */
|
|
#define USB_QUIRK_RESET 0x00000010
|
|
|
|
/* device has more interface descriptions than the bNumInterfaces count,
|
|
and can't handle talking to these interfaces */
|
|
#define USB_QUIRK_HONOR_BNUMINTERFACES 0x00000020
|
|
|
|
/* device needs a pause during initialization, after we read the device
|
|
descriptor */
|
|
#define USB_QUIRK_DELAY_INIT 0x00000040
|
|
|
|
/*
|
|
* For high speed and super speed interupt 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.
|
|
*/
|
|
#define USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL 0x00000080
|
|
|
|
#endif /* __LINUX_USB_QUIRKS_H */
|