On Tue, Aug 19, 2014 at 10:27:39PM +0800, Peter Chen wrote: > On Tue, Aug 19, 2014 at 06:05:27PM +0800, Xuebing Wang wrote: > > > > On 08/19/2014 12:58 PM, Peter Chen wrote: > > >>My environment is Freescale i.MX6SL EVK board (as USB peripheral device), > > >>which is based on kernel 3.10.17. i.MX6SL uses ChipIdea dual-role > > >>controller. > > >> > > >>My problem is that gadget drivers g_ether and g_audio (UAC1 enabled) can > > >>NOT be detected by Windows 7 natively, while g_mass_storage, g_serial, > > >>g_hid can be detected by Windows 7 natively. > > >> > > >>1) I found that both Ether and USB Audio uses .bAlternateSetting, while > > >>Mass Storage, Serial and HID do NOT. I am wondering if this is related to > > >>how Gadget framework handles USB_REQ_SET_INTERFACE request? > > >> > > >If possible, would you use Linux PC or Mac OS (macbook pro+) to test? > > >>From my previous experiences, g_audio works not well with windows. > > > > Thanks Peter. g_audio is now working with Ubuntu and MacOS host, but > > can NOT get detected by Windows 7. > > > > I am not sure if this Windows 7 detection issue is not specific to > > g_audio (UAC1), because Windows can NOT natively detect g_ether > > (even with RNDIS CONFIG_USB_ETH_RNDIS=y enabled). > > > > Also, in file f_rndis.c, it says "/* Some controllers can't support > > RNDIS ... */", I am not sure what does this mean. Does it mean > > possibly controller like ChipIdea does NOT support RNDIS? > > > > RNDIS is software stuff, isn't it? it probably means that some HW configuration doesn't have enough endpoints, or doesn't support a certain transfer type ;-) -- balbi
Attachment:
signature.asc
Description: Digital signature
