On Wed, 27 Jul 2011 12:01:28 +0200 Michal Nazarewicz <mina86@xxxxxxxxxx> wrote: > On Tue, 26 Jul 2011 18:46:23 +0200, jacob pan > <jacob.jun.pan@xxxxxxxxx> wrote: > > I am trying to use functionfs with composite gadget support for > > CDC/RNDIS ethernet. For testing, i use the ffs-test tool on the > > gadget side and connect it to a PC host. For Linux host, usb0 works > > ok. But it seems on the Windows 7 host side, the USB RNDIS driver > > does not bind with the device. Is there any additional steps needed > > to make ffs composite device work with windows 7? Or this is a > > limitation on the windows side? > > Have you taken a look at this message: > <http://permalink.gmane.org/gmane.linux.usb.general/48777> > Apparently, there are some issues with current .inf file distributed > with the > Linux kernel. Since I'm currently missing both hardware and Windows, > I am yet > to investigate it. thanks for pointing this to me, i have not seen it before. I am fairly unfamiliar with windows, I am hoping to have a solution that just works with the existing windows drivers. > > > Also, if i have to resort to use ffs in pure configuration and > > g_ether as single function gadget. I would need to obtain the > > hotplug event when ffs is in use. Then i can switch kernel modules, > > e.g. from g_ffs to g_ether. Is it correct to say the hotplug events > > can only be obtained from ffs ep0 by reading ffs events? I don't > > think we are getting a uevent in this case. > > Currently, ffs has no uevents. It should be fairly easy to add some > if you really need them. I think ffs_data_open(), ffs_data_close(), > ffs_data_clear() and ffs_data_reset() are functions that are most > interesting. > my goal is to inform userspace the connection status of otg port such that user can make a decision on which gadget role he wants to use for the device. It seems these ffs_data_xxx functions cannot definitively tell the connection state. I guess i may have to add uevents to the UDC driver or OTG transcriver driver. But it would not be a generic solution as functionfs. -- Thanks Jacob -- 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
