Hello,
I'm using a board equipped with ChipIdea UDC and trying to expose storage device (for example) out of it.
I load the following modules/drivers:
udc-core
libcomposite
ci_hdrc
ci_hdrc_usb
usb_f_mass_storage.
Next, I used the basic setup via configfs:
idVendor = 0x1d6b
idProduct = 0x0001
Created an empty config, function and linked the function to configuration:
mkdir configs/c.1
mkdir functions/mass_storage.1
(also created lun0 with dd)
ln -s functions/mass_storage.1 configs/c.1
Then started the device:
echo ci_hdrc.0 > UDC
On device side I can see that the setup from Linux perspective is looking good:
[ 8.360082] Mass Storage Function, version: 2009/09/11
[ 8.360094] LUN: removable file: (no medium)
However on the host side I see some errors:
[ 10.087328] usb 1-1: device descriptor read/64, error -32
[ 10.455328] usb 1-1: device descriptor read/64, error -32
[ 10.695328] usb 1-1: device descriptor read/64, error -32
[ 11.875327] usb 1-1: device not accepting address 4, error -32
[ 12.423327] usb 1-1: device not accepting address 5, error -32
[ 12.429178] usb usb1-port1: unable to enumerate USB device
I added some debug printks to both coreidea/udc.c and coreidea/core.c and can see that the interatom between the platform driver and the device controller is ok (i.e interrupts etc).
git tag 4.14.76.
Any idea?
Thanks a lot in advance for any help.
Yuval
