Hi All, I'm trying to simulate a USB-Ethernet controller device in s/w. For this I plan to use the ethernet gadget driver present in the linux kernel. Currently I don't have any debug board with a USB device controller, so I though I'd use my N810. The N810 has a OTG controller which can act as both Master & slave. I've recompiled the kernel though, to make it behave only as a slave (i.e I've disabled the OTG config in the kernel and enabled only periheral mode). This is to keep things simple and not have OTG functionality interfere in any way. Now the host machine, to which I'll connect my USB device (N810), runs a proprietary OS and we do not have access to it's source code and/or any other means to access it's internals. I know that it supports CDC-ECM driver for a particular chip. The spec-sheet of the chip mentions the following 4 endpoints setup by it: * EP0 - Control * EP1 - Interrupt * EP2 - BULK IN * EP3 - BULK OUT The spec also say that the chip supports only 1 interface and 1 configuration. I enabled all debugs in the ethernet driver (gadget/ether.c). On inserting the ether module I can bring up the USB network interface (usb0). I see the following log in 'dmesg': usb0: using musb_hdrc, OUT ep1out IN ep1in STATUS ep2in usb0: RNDIS ready On connecting the device to the Host, I get the following: musb_hdrc periph: enabled ep2in for int IN, dma, maxpacket 16 musb_hdrc periph: enabled ep1in for bulk IN, dma, maxpacket 512 musb_hdrc periph: enabled ep1out for bulk OUT, dma, maxpacket 512 usb0: high speed config #2: 100 mA, Ethernet Gadget, using RNDIS 1. How can I ascertain that the enumeration has happened properly? 2. From the above log, does it match the endpoint config as shown by the spec-sheet? I'm confused because EP1 should be interrupt, but log's showing it as BULK!...or this doesn't matter. Actually I'm expecting DHCP packets to come over this interface because the HOST gets it's IP address dynamically. But snooping usb0 interface does not show anything! :( This most likely means the enumeration has failed. But I can't figure out why & where. Any pointers on this would be helpfull. Thanks, -mandeep -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
