Create Account
Search
You are here: TDG Forum  >>  Board Support Packages (BSP)  >>  Linux  >>  USB Gadget Drivers (Ethernet Gadget (with CDC Ethernet support)) with USB OTG as Host may fail

Technical Discussion Group Forum

This forum is provided for user discussion. While Beacon EmbeddedWorks support staff and engineers participate, Beacon EmbeddedWorks does not guarantee the accuracy of all information within in the Technical Discussion Group (TDG).

The "Articles" forums provide brief Articles written by Beacon EmbeddedWorks engineers that address the most frequently asked technical questions.

To receive email notifications when updates are posted for a Beacon EmbeddedWorks product download, please subscribe to the TDG Forum of interest.

TDG Forum

PrevPrev Go to previous topic
NextNext Go to next topic
Last Post 22 Oct 2014 01:08 PM by  bradb
USB Gadget Drivers (Ethernet Gadget (with CDC Ethernet support)) with USB OTG as Host may fail
 0 Replies
Sort:
You are not authorized to post a reply.
Author Messages
bradb
Basic Member
Basic Member
Posts:203


--
22 Oct 2014 01:08 PM
    Subject    
    DM37LINUX-1038: USB Gadget Drivers (Ethernet Gadget (with CDC Ethernet support)) with USB OTG as Host may fail
    Product    
    DM37x Torpedo and DM37x Torpedo + Wireless
    Software OS    
    DM37x Linux 2.4-3 BSP 
    Description    
    Customer's looking to use Ethernet Gadget (with CDC Ethernet support) with USB OTG as Host may see a similar error following a ping when using Linux 2.4-3 release.

    [  112.575347] musb_ep_program 834: broken !rx_reinit, ep2 csr a200
    [  112.586914] musb_ep_program 834: broken !rx_reinit, ep2 csr a000
    [  113.567474] musb_ep_program 834: broken !rx_reinit, ep2 csr a200
    [  114.568634] musb_ep_program 834: broken !rx_reinit, ep2 csr a000
    [  115.569824] musb_ep_program 834: broken !rx_reinit, ep2 csr a200
    [  116.570983] musb_ep_program 834: broken !rx_reinit, ep2 csr a000
    [  117.572326] musb_ep_program 834: broken !rx_reinit, ep2 csr a200
    [  117.599212] musb_ep_program 834: broken !rx_reinit, ep2 csr a000
    [  118.573486] musb_ep_program 834: broken !rx_reinit, ep2 csr a200
    [  119.574676] musb_ep_program 834: broken !rx_reinit, ep2 csr a000

    This error was seen when using the default BSP and only selecting CONFIG_USB_USBNET, CONFIG_USB_NET_CDCETHER, and CONFIG_USB_NET_RNDIS_HOST=y in the USB Network Adapters section of the kernel config file.   Simply connect two DM37x systems together using a USB OTG A to mini-B cable and a USB OTG A to mini-A cable.  Insert the USB mini B plug into the DM37x client system and the USB A plug into the host adapter.  The host adapter's mini A plug is then inserted into the DM37x host system.  

    Selection of the Ethernet Gadget (with CDC Ethernet support)
     Prompt: USB Gadget Drivers                                                                                                                      
       -> Device Drivers   -> USB support (USB_SUPPORT [=y])   -> USB Gadget Support (USB_GADGET [=y])   

    Word-around

    This issue has been reported as being seen when using kernels through 3.3.0.    The suggested workaround is to disable the MUSB DMA.

    Old configuration:
    # CONFIG_MUSB_PIO_ONLY is not set
    # CONFIG_USB_UX500_DMA is not set
    CONFIG_USB_INVENTRA_DMA=y
    CONFIG_MUSB_USE_SYSTEM_DMA_WORKAROUND=y
    # CONFIG_USB_TI_CPPI_DMA is not set

    New configuration:
    CONFIG_MUSB_PIO_ONLY=y
    # CONFIG_USB_INVENTRA_DMA is not set
    # CONFIG_MUSB_USE_SYSTEM_DMA_WORKAROUND is not set
    You are not authorized to post a reply.

    Forums Board Support Packages (BSP) Linux