Date: Fri, 15 May 2009 13:30:35 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: thierry.herbelot@free.fr Cc: freebsd-usb@FreeBSD.org Subject: Re: Asynchronous bulk transfers in usb2 ? Message-ID: <20090515.133035.452788619.imp@bsdimp.com> In-Reply-To: <200905152119.07569.thierry.herbelot@free.fr> References: <200905151857.21361.thierry.herbelot@free.fr> <200905152106.48104.hselasky@c2i.net> <200905152119.07569.thierry.herbelot@free.fr>
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In message: <200905152119.07569.thierry.herbelot@free.fr> Thierry Herbelot <thierry.herbelot@free.fr> writes: : Le Friday 15 May 2009, Hans Petter Selasky a =E9crit : : > On Friday 15 May 2009, Thierry Herbelot wrote: : > > Hello, : > > : > > This is a follow-on for : : > > http://www.mail-archive.com/freebsd-usb%40freebsd.org/msg04000.ht= ml, : > > where a code snippet was posted to use the new USB stack. : > > : > > I've just recompiled my old experiment (which used to work at the= time), : > > and it does not seem to work with today's current (I made the cos= metic : > > changes due to the change of name for the libusb, so the compile = at least : > > is OK). : > > : > > the issue is that the following loop (copied from the previous ar= chived : > > post) is never executed : : > > -------------------- : > > while ( ( pdev =3D libusb20_be_device_foreach ( pbe, pdev ) ) ) : > > { : > > ddesc =3D libusb20_dev_get_device_desc ( pdev ); : > > printf("vendor %x prod %x\n", ddesc->idVendor, ddesc->idProduct= ); : > > : > > /* stop with the first found device */ : > > if ( ddesc->idVendor =3D=3D MY_VENDOR_ID ) : > > { : > > libusb20_be_dequeue_device ( pbe, pdev ); : > > break; : > > } : > > } : > > -------------------- : > > : > > pdev is always NULL at the end of the loop (even though a USB dev= ice has : > > been plugged, has been detected by the USB stack and is correctly= seen, : > > as per usbconfig, with the expected idVendor). : > > : > > I have not followed the recent developments on the USB stack : ma= ybe some : > > change is needed in my code ? : > : > Check permissions for devices under /dev/usb : = : *blush* (this is indeed the reason) : = : but .... this used to work ;-) (maybe it did no longer work after the= device = : nodes were added for the USB devices) : = : what is the recommended way to change the permissions for the usb dev= ice = : nodes ? (with devd ?) : = : in the meantime, I'll try to run from root ... I use devfs.rules: [localrules=3D10] add path 'usb/*' mode 0660 and put my trusted to use usb users into group operator. Warner
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