[LCA2019 Chat] Headless RPi setup, cdcether not working?
Marc MERLIN
marc at merlins.org
Wed Jan 30 08:28:36 AEDT 2019
Ok, so to be clear, I should disable serial console and USB cdc ether will
work?
On Wed, Jan 30, 2019, 06:27 Joel Wirāmu Pauling <aenertia at aenertia.net
wrote:
> It slows down the SPI bus frequency and breaks several other DTB overlays.
>
> The sunxi stuff has proper Uarts separate to ghr GPIO which is one reason
> I favour them over the real rpi.
>
> On Tue., 29 Jan. 2019, 18:26 Marc MERLIN <marc at merlins.org wrote:
>
>> On Tue, Jan 29, 2019 at 06:15:15PM +1300, Joel Wirāmu Pauling wrote:
>> > I Enable the gpio serial it works with UART normally but due to
>> > architectural issues with the broadcom SOCs can interfere with perf.
>>
>> Are you saying that using serial console breaks usb ethernet?
>>
>> > On Tue., 29 Jan. 2019, 18:02 Marc MERLIN <marc at merlins.org wrote:
>> >
>> > > On Tue, Jan 29, 2019 at 07:04:24AM +1100, Wes Cilldhaire wrote:
>> > > >
>> > > >
>> > > > ----- On 26 Jan, 2019, at 7:17 PM, martin f krafft
>> madduck at madduck.net
>> > > wrote:
>> > > > > On the Pi I just get the message
>> > > >
>> > > > > "udc-core: couldn't find an available UDC - added [g_cdc] to list
>> > > > > of pending drivers."
>> > > >
>> > > > > which the article says means that I didn't enable the dwc2
>> properly.
>> > > >
>> > > > > But hey:
>> > > >
>> > > > > # grep dwc /proc/cmdline
>> > > > > 8250.nr_uarts=0 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416
>> > > > > bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:3B:08:DD
>> > > > > vc_mem.mem_base=0x1ec00000 vc_mem.mem_size=0x20000000
>> > > > > dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1
>> > > > > root=PARTUUID=9a617d9a-02 rootfstype=ext4 elevator=deadline
>> > > > > fsck.repair=yes rootwait modules-load=dwc2,g_cdc
>> > > > > ^^^^^^^^^^
>> > > >
>> > > > You need to add the dtoverlay=dwc2 line in config.txt as well so the
>> > > device actually appears in the device tree for the module to find.
>> > > >
>> > > > Yes, I overlooked this step too initially, something about its
>> position
>> > > in the instructions seems to make one's mind skip over it :)
>> > > > (null)
>> > >
>> > > I can't get cdc_ether working
>> > >
>> > > I used the rPi image that was available from the burner near rego.
>> > >
>> > > As indicated here, I did this:
>> > > root at raspberrypi:~# grep dwc2 /boot/config.txt
>> > > dtoverlay=dwc2
>> > > root at raspberrypi:~# grep dwc2 /boot/*.txt
>> > >
>> > > /boot/cmdline.txt:dwc_otg.lpm_enable=0 console=serial0,115200
>> console=tty1
>> > > root=PARTUUID=b4261201-02 rootfstype=ext4 elevator=deadline
>> > > fsck.repair=yes rootwait splash plymouth.ignore-serial-consoles
>> > > modules-load=dwc2,g_ether
>> > > /boot/config.txt:dtoverlay=dwc2
>> > >
>> > > interface seems to come up:
>> > > [ 5.655024] dwc2 20980000.usb: 20980000.usb supply vusb_d not
>> found,
>> > > using dummy regulator
>> > > [ 5.655159] dwc2 20980000.usb: 20980000.usb supply vusb_a not
>> found,
>> > > using dummy regulator
>> > > [ 6.113258] dwc2 20980000.usb: EPs: 8, dedicated fifos, 4080
>> entries in
>> > > SPRAM
>> > > [ 6.154975] dwc2 20980000.usb: DWC OTG Controller
>> > > [ 6.162747] dwc2 20980000.usb: new USB bus registered, assigned bus
>> > > number 1
>> > > [ 6.252180] dwc2 20980000.usb: irq 33, io mem 0x20980000
>> > > [ 7.044669] g_ether gadget: Ethernet Gadget, version: Memorial Day
>> 2008
>> > > [ 7.053989] g_ether gadget: g_ether ready
>> > > [ 7.060353] dwc2 20980000.usb: bound driver g_ether
>> > > [ 7.189129] dwc2 20980000.usb: new device is high-speed
>> > > [ 7.236167] i2c /dev entries driver
>> > > [ 7.565138] dwc2 20980000.usb: new device is high-speed
>> > > [ 7.693246] dwc2 20980000.usb: new device is high-speed
>> > > [ 7.766371] dwc2 20980000.usb: new address 10
>> > > [ 7.787912] g_ether gadget: high-speed config #1: CDC Ethernet
>> (ECM)
>> > >
>> > > I give it an IP:
>> > > root at raspberrypi:~# ifconfig usb0
>> > > usb0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>> > > inet 192.168.1.2 netmask 255.255.255.0 broadcast
>> 192.168.1.255
>> > > inet6 fe80::15e4:95ea:e740:aa7d prefixlen 64 scopeid
>> 0x20<link>
>> > > ether be:e6:a6:5b:35:18 txqueuelen 1000 (Ethernet)
>> > >
>> > > On my computer, I give it an IP too:
>> > > root at raspberrypi:~# ifconfig usb0
>> > > usb0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>> > > inet 192.168.1.2 netmask 255.255.255.0 broadcast
>> 192.168.1.255
>> > > inet6 fe80::15e4:95ea:e740:aa7d prefixlen 64 scopeid
>> 0x20<link>
>> > >
>> > > dmesg says:
>> > > Jan 28 20:38:26 saruman kernel: [728255.209791] usb 1-2: new
>> high-speed
>> > > USB device number 40 using xhci_hcd
>> > > Jan 28 20:38:26 saruman kernel: [728255.358611] usb 1-2: New USB
>> device
>> > > found, idVendor=0525, idProduct=a4a2, bcdDevice= 4.14
>> > > Jan 28 20:38:26 saruman kernel: [728255.358615] usb 1-2: New USB
>> device
>> > > strings: Mfr=1, Product=2, SerialNumber=0
>> > > Jan 28 20:38:26 saruman kernel: [728255.358617] usb 1-2: Product:
>> > > RNDIS/Ethernet Gadget
>> > > Jan 28 20:38:26 saruman kernel: [728255.358619] usb 1-2: Manufacturer:
>> > > Linux 4.14.79+ with 20980000.usb
>> > > Jan 28 20:38:26 saruman kernel: [728255.359846] cdc_subset: probe of
>> > > 1-2:1.0 failed with error -22
>> > > Jan 28 20:38:26 saruman kernel: [728255.361388] cdc_ether 1-2:1.0
>> usb0:
>> > > register 'cdc_ether' at usb-0000:00:14.0-2, CDC Ethernet Device,
>> > > 62:3c:c9:7f:9d:e5
>> > >
>> > > Not sure if cdc_subset probe failed is bad.
>> > >
>> > > If I ping my computer from the rPi, I see its packets on my laptop:
>> > > 20:58:43.391704 ARP, Request who-has 192.168.1.1 tell 192.168.1.2,
>> length
>> > > 28
>> > > 20:58:43.391727 ARP, Reply 192.168.1.1 is-at 62:3c:c9:7f:9d:e5,
>> length 28
>> > >
>> > > But no packet from my laptop never seems to make it back to the rPi.
>> > >
>> > > For those who got it to work, do I have the wrong rPi image or some
>> > > other driver problem that causes the rPi not to get packets back in?
>> > >
>> > > Thanks,
>> > > Marc
>> > > --
>> > > "A mouse is a device used to point at the xterm you want to type in" -
>> > > A.S.R.
>> > > Microsoft is to operating systems ....
>> > > .... what McDonalds is to
>> gourmet
>> > > cooking
>> > > Home page: http://marc.merlins.org/ | PGP
>> > > 7F55D5F27AAF9D08
>> > > --
>> > > Chat mailing list
>> > > Chat at lists.lca2019.linux.org.au
>> > > http://lists.lca2019.linux.org.au/mailman/listinfo/chat
>> > >
>>
>> --
>> "A mouse is a device used to point at the xterm you want to type in" -
>> A.S.R.
>> Microsoft is to operating systems ....
>> .... what McDonalds is to gourmet
>> cooking
>> Home page: http://marc.merlins.org/
>>
>
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