Re: USB Ethernet gadget on Nokia n900

Pavel Machek
2014-10-26T12:00:11Z

On Sun 2014-10-26 12:12:46, Pali Rohár wrote:
> On Sunday 26 October 2014 12:08:25 Pavel Machek wrote:
> > Hi!
> >
> > > On Sun, Oct 19, 2014 at 09:19:37PM +0200, Pavel Machek wrote:
> > > > I am trying to use nfsroot, so I can't use modules.
> > >
> > > Why not?
> > >
> > > > (I am attaching full config, in case I missed something
> > > > important).
> > >
> > > I'm using the below config with 3.17 and g_ether works OK.
> > >
> > > (My initramfs modprobes g_ether, runs busybox ifconfig for
> > > usb0 and launches sshd.)
> >
> > I am trying to get 3.14 kernel to work, first. There, usb
> > gadget works when compiled into kernel. But with modules, I
> > get
> >
> > # root@(none):/tmp# insmod libcomposite.ko
> > # root@(none):/tmp# insmod u_ether.ko
> > # root@(none):/tmp# insmod usb_f_rndis.ko
> > # root@(none):/tmp# insmod g_ether.ko
> >
> > [ 169.061218] udc musb-hdrc.0.auto: registering UDC driver
> > [g_ether] [ 169.078918] g_ether musb-hdrc.0.auto: failed to
> > start g_ether: -2
> >
> > -2 is ENOENT...
>
> Can you try g_nokia.ko? I used this module for usb networking.

Ok, so lets go to 3.17, and try with compiled-in modules?

[13220.555232] usb 5-1: USB disconnect, device number 41
[13225.972033] usb 5-1: new high-speed USB device number 42 using
ehci-pci
[13241.084037] usb 5-1: device descriptor read/64, error -110
pavel@amd:/data/l/maemo$

CONFIG_USB_LIBCOMPOSITE=y
CONFIG_USB_U_ETHER=y
CONFIG_USB_F_ECM=y
CONFIG_USB_F_SUBSET=y
# CONFIG_USB_CONFIGFS is not set
# CONFIG_USB_ZERO is not set
CONFIG_USB_ETH=y

I had musb_dual_role set, trying to make it gadget-only:

1. Host only mode (USB_MUSB_HOST) (NEW)
2. Gadget only mode (USB_MUSB_GADGET) (NEW)
> 3. Dual Role mode (USB_MUSB_DUAL_ROLE) (NEW)
choice[1-3]: 2

Same result:
[13621.776030] usb 5-1: new high-speed USB device number 57 using
ehci-pci
[13636.888036] usb 5-1: device descriptor read/64, error -110

Wait a moment. It seems I'm using drivers from legacy/ directory. Is
that good idea?

Lets try:

10. CDC Composite Device (Ethernet and ACM) (USB_CDC_COMPOSITE)

No, same result.

[13844.456032] usb 5-1: new high-speed USB device number 63 using
ehci-pci
[13859.568028] usb 5-1: device descriptor read/64, error -110

I don't think I can actually select nokia support in 3.17 :-(.

Pavel
--
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