>> Because of this, I think my enumeration is not happening correctly >> since the rest of the >> descriptors are not advertised at all! >> >> Is my understanding correct? >> >> What should I set the UDC too? CONFIG_USB_GADGET_OMAP? > > no, it's Inventra HDRC USB Peripheral Ok, so I found the fo0llowing set: # CONFIG_USB_MUSB_HOST is not set CONFIG_USB_MUSB_PERIPHERAL=y # CONFIG_USB_MUSB_OTG is not set CONFIG_USB_GADGET_MUSB_HDRC=y With this set, DEV_CONFIG_CDC is also set! So I'll explain my problem further...I'm using the ether gadget on my n810 to connect to a host running a proprietary OS. This host supports the ASIX 88772 USB-Ethernet bridge. When I connect my device to the host I see the following strange behaviour during the enumeration phase (with my debugs): [ 3647.828125] __________USB control req___________ [ 3647.828125] bRequest(06) - Get descriptor [ 3647.828125] bRequestType(80) - IN [ 3647.828125] wValue(0200) - Configuration [ 3647.828125] wLength(0009) [ 3647.828125] ____________________________________ This shows the host asking for the config descriptor with a length of 9 bytes. To this the gadget replies with a "wTotalLength" value of 9! Shouldn't this be the total length of the config descriptor + all the subordinate descriptors (interface, endpoints etc)??? After this the host sends another req with the following details: [16594.835937] __________USB control req___________ [16594.835937] bRequest(06) - Get descriptor [16594.835937] bRequestType(80) - IN Standard [16594.835937] wValue(0200) - Configuration [16594.835937] wLength(0009) [16594.835937] ____________________________________ I think this is causing a problem, where the host is not seeing all the descriptor properly. I put some more debugs in config.c ( usb_gadget_config_buf() & usb_descriptor_fillbuf() ). They showed that hs_eth_function doesn't have anything in it! This is why I suspected that DEV_CONFIG_CDC might not be set Any clues as what might be going wrong? -mandeep > > -- > balbi > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
