Is there a way to restrict gadgetfs to Full Speed? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern) Data science time! April 2019 and salary with experience The Ask Question Wizard is Live!Limit USB gadget driver speedUTF-8 all the way throughlinux usb connect/disconnect eventUSB linux gadget zero driver communicate with Windows hostLimit USB gadget driver speedForce USB High Speed EHCI 2.0 hub to enumerate as Full Speed UHCI/OHCI devicehow to detect the USB gadget(device side) status on linux?hid usb gadget driver link to particular usb portRaspberry Pi Zero USB device emulationHow to communicate with the devices behind a USB hub?USB enumeration failing in WIN 10

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Is there a way to restrict gadgetfs to Full Speed?



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)
Data science time! April 2019 and salary with experience
The Ask Question Wizard is Live!Limit USB gadget driver speedUTF-8 all the way throughlinux usb connect/disconnect eventUSB linux gadget zero driver communicate with Windows hostLimit USB gadget driver speedForce USB High Speed EHCI 2.0 hub to enumerate as Full Speed UHCI/OHCI devicehow to detect the USB gadget(device side) status on linux?hid usb gadget driver link to particular usb portRaspberry Pi Zero USB device emulationHow to communicate with the devices behind a USB hub?USB enumeration failing in WIN 10



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0















I have two USB devices (host and device) that both support high speed. I am trying to emulate a legacy device on gadgetfs which is full speed. The host device unfortunately complains that there is something odd when it connects to the high speed device. I cannot change anything on the host. my device is a Raspberry Pi zero W.



I can not find any way to restrict the gadgetfs device to connect (negotiate?) as a full speed device. Short term I am using a usb 1.1 hub to sovle the problem. Long term this is not a viable solution.



The only reference I have found for this is in Limit USB gadget driver speed, and I would prefer not to have go into the kernel and modify the drivers.



Does anyone have any suggestion on how I could achieve this?










share|improve this question
























  • Maybe I did not elaborate the details enough, this is a programming issue. I am writing a linux userspace gadgetfs driver to emulate the device and am trying to limit the the gadgetfs interface to HS. The gadgetfs API has very limited documentations. I can not find any references as to how to limit gadgetfs connections speeds. I was hoping there was a way to do this with gadgetfs, and if not some other alternative.

    – mw.
    Mar 11 at 12:33

















0















I have two USB devices (host and device) that both support high speed. I am trying to emulate a legacy device on gadgetfs which is full speed. The host device unfortunately complains that there is something odd when it connects to the high speed device. I cannot change anything on the host. my device is a Raspberry Pi zero W.



I can not find any way to restrict the gadgetfs device to connect (negotiate?) as a full speed device. Short term I am using a usb 1.1 hub to sovle the problem. Long term this is not a viable solution.



The only reference I have found for this is in Limit USB gadget driver speed, and I would prefer not to have go into the kernel and modify the drivers.



Does anyone have any suggestion on how I could achieve this?










share|improve this question
























  • Maybe I did not elaborate the details enough, this is a programming issue. I am writing a linux userspace gadgetfs driver to emulate the device and am trying to limit the the gadgetfs interface to HS. The gadgetfs API has very limited documentations. I can not find any references as to how to limit gadgetfs connections speeds. I was hoping there was a way to do this with gadgetfs, and if not some other alternative.

    – mw.
    Mar 11 at 12:33













0












0








0








I have two USB devices (host and device) that both support high speed. I am trying to emulate a legacy device on gadgetfs which is full speed. The host device unfortunately complains that there is something odd when it connects to the high speed device. I cannot change anything on the host. my device is a Raspberry Pi zero W.



I can not find any way to restrict the gadgetfs device to connect (negotiate?) as a full speed device. Short term I am using a usb 1.1 hub to sovle the problem. Long term this is not a viable solution.



The only reference I have found for this is in Limit USB gadget driver speed, and I would prefer not to have go into the kernel and modify the drivers.



Does anyone have any suggestion on how I could achieve this?










share|improve this question
















I have two USB devices (host and device) that both support high speed. I am trying to emulate a legacy device on gadgetfs which is full speed. The host device unfortunately complains that there is something odd when it connects to the high speed device. I cannot change anything on the host. my device is a Raspberry Pi zero W.



I can not find any way to restrict the gadgetfs device to connect (negotiate?) as a full speed device. Short term I am using a usb 1.1 hub to sovle the problem. Long term this is not a viable solution.



The only reference I have found for this is in Limit USB gadget driver speed, and I would prefer not to have go into the kernel and modify the drivers.



Does anyone have any suggestion on how I could achieve this?







linux usb driver






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Apr 9 at 20:45







mw.

















asked Mar 8 at 20:37









mw.mw.

6611




6611












  • Maybe I did not elaborate the details enough, this is a programming issue. I am writing a linux userspace gadgetfs driver to emulate the device and am trying to limit the the gadgetfs interface to HS. The gadgetfs API has very limited documentations. I can not find any references as to how to limit gadgetfs connections speeds. I was hoping there was a way to do this with gadgetfs, and if not some other alternative.

    – mw.
    Mar 11 at 12:33

















  • Maybe I did not elaborate the details enough, this is a programming issue. I am writing a linux userspace gadgetfs driver to emulate the device and am trying to limit the the gadgetfs interface to HS. The gadgetfs API has very limited documentations. I can not find any references as to how to limit gadgetfs connections speeds. I was hoping there was a way to do this with gadgetfs, and if not some other alternative.

    – mw.
    Mar 11 at 12:33
















Maybe I did not elaborate the details enough, this is a programming issue. I am writing a linux userspace gadgetfs driver to emulate the device and am trying to limit the the gadgetfs interface to HS. The gadgetfs API has very limited documentations. I can not find any references as to how to limit gadgetfs connections speeds. I was hoping there was a way to do this with gadgetfs, and if not some other alternative.

– mw.
Mar 11 at 12:33





Maybe I did not elaborate the details enough, this is a programming issue. I am writing a linux userspace gadgetfs driver to emulate the device and am trying to limit the the gadgetfs interface to HS. The gadgetfs API has very limited documentations. I can not find any references as to how to limit gadgetfs connections speeds. I was hoping there was a way to do this with gadgetfs, and if not some other alternative.

– mw.
Mar 11 at 12:33












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