On Wed, 2 Jan 2013, victor wrote: > Happy new year 2013. > After a long Christmas break, the USB file storage gadget and UDC gadget > code are able to work partially on USB enumeration (running on linux 3.4.4). > > 1) host PC sends a GET_DESCRIPTOR request, the gadget replies with device > descriptor. > 2) host PC sends a SET_ADDRESS request > 3) host PC sends a GET_DESCRIPTOR request, the gadget replies with the same > device descriptor. > 4) host PC sends a GET_DESCRIPTOR request, the gadget replies with > configuration descriptor. > 5) host PC sends a GET_DESCRIPTOR request, the gadget replies with string > descriptor. > 6) host PC sends a GET_DESCRIPTOR request, the gadget replies with string > descriptor. > 7) host PC sends a GET_DESCRIPTOR request, the gadget replies with device > qualifier descriptor. > 8) host PC sends a GET_DESCRIPTOR request, the gadget replies with the same > device descriptor. > 9) host PC sends a GET_DESCRIPTOR request, the gadget replies with > configuration descriptor. > 10) host PC sends SET_CONFIGURATION > 11) host PC sends 0xfe bRequest What does the gadget send in response to this request? > Then host PC sends a few more GET_DESCRIPTOR request, and the enumeration > stops. No SCSI_inquiry command is received by the gadget device. In host PC, > the gadget device is identified as USB mass storage device with an > exclamation mark. You can find out what g_file_storage is doing if you uncomment the two #define lines near the start of the file_storage.c file: /* #define VERBOSE_DEBUG */ /* #define DUMP_MSGS */ > The gadget device uses "endpoint 1" for bulk in and bulk out. In fsg_bind() > of file_storage.c, bulk out endpoint is 2. No, it's not. The driver does not use fixed addresses for its endpoints. fsg_bind() calls usb_ep_autoconfig() to set up the endpoint addresses. > How to fix the bulk out endpoint > to 1? Fix your UDC driver. If it uses the right names for the endpoints then usb_ep_autoconfig() will automatically do the right thing. Alan Stern -- 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
