converting IMX6 board to DM_ETH and DM_USB - usb_ether gadget support

[Heiko Schocher]

Hello Tim,

On 25.02.21 02:21, Tim Harvey wrote:
> Greetings,
> 
> I'm trying to convert the gwventana board support to DM_ETH and DM_USB
> and one item I have not resolved yet is USB Ethernet gadget support.
> 
> For non-dm a call to 'usb_eth_initialize' creates a usb_ether gadget
> that can be used for ethernet communication between the IMX6 OTG
> controller in device mode to a USB host. How is that accomplished via
> dm?
> 
> I find that drivers/usb/gadget/ether.c has dm support but it would
> appear that a controller of UCLASS_USB_GADGET_GENERIC must bind for it
> to work yet I don't see how this works with CI_UDC.
> 
> Other IMX6 boards that have gone through dm conversion have simply
> dropped the call to usb_eth_initialize and I don't see what else they
> enable that provides this functionality.
> 
> Any ideas?

Late ... but I stumbled just over the same problem... do you have solved
it?

I just tried this on an imx6ull based board and get it not fully working,
but usb ethernet with DM_ETH enabled at least starts for me...


=> setenv ethact usb_ether
=> setenv ipaddr 192.168.7.2

The magic call for me is:

=> bind usb 0 usb_ether


After this I see in "dm tree" output:

 simple_bus    5  [ + ]   simple_bus            |   |-- aips-bus at 2100000
 usb           0  [   ]   ehci_mx6              |   |   |-- usb at 2184000
 eth           1  [   ]   usb_ether             |   |   |   `-- usb_ether

And issuing a ping starts usb_ether with (some DBG are enabled)

=> ping 192.168.71.
using ci_udc, OUT ep2out-bulk IN ep1in-bulk STATUS ep3in-int
MAC 8e:79:6a:94:5f:09
HOST MAC 5a:d1:77:da:0e:7a
RNDIS ready
-- suspend --
-- reset --
-- portchange 2 High
handle setup GET_DESCRIPTOR, 80, 6 index 0 value 100 length 40
handle_setup: Set ep0 to IN for Data Stage
[...]
-- reset --
-- portchange 2 High
[...]
ci_ep_enable: from 512 to 16
ci_ep_enable: num=3 maxpacket=16
ci_ep_enable: num=1 maxpacket=512
ci_ep_enable: num=2 maxpacket=512
high speed config #2: 2 mA, Ethernet Gadget, using RNDIS
[...]

[remark] until here same log as for the case with DM_ETH not enabled

[...]
ept0 out req 9bf78be0, complete 0
handle setup GET_STATUS, 21, 0 index 0 value 0 length 18
handle_setup: Set ep0 to OUT for Data Stage
ept0 out pre-queue req 9bf78be0, buffer 9bf91e80
ept0 out queue len 18, req 9bf78be0, buffer 9bf91e80
handle_setup: end status: 0
ept0 out req 9bf78be0, complete 0


And than the board makes a reset (no crash dump)

on the other side I see:

[2114399.914244] usb 1-1.3.1.2: new high-speed USB device number 46 using dwc_otg
[2114400.311239] usb 1-1.3.1.2: config 1 has 0 interfaces, different from the descriptor's value: 1
[2114400.436155] usb 1-1.3.1.2: New USB device found, idVendor=0525, idProduct=a4a5, bcdDevice= 3.21
[2114400.436175] usb 1-1.3.1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[2114400.436190] usb 1-1.3.1.2: Product: RNDIS/Ethernet Gadget
[2114400.436204] usb 1-1.3.1.2: Manufacturer: U-Boot
[2114400.569248] usb-storage 1-1.3.1.2:2.0: USB Mass Storage device detected
[2114400.569721] usb-storage 1-1.3.1.2:2.0: Quirks match for vid 0525 pid a4a5: 10000
[2114400.597702] rndis_host 1-1.3.1.2:2.0: RNDIS init failed, -71
[2114400.597799] rndis_host: probe of 1-1.3.1.2:2.0 failed with error -71
[2114400.598336] rndis_wlan 1-1.3.1.2:2.0: RNDIS init failed, -71
[2114400.598591] rndis_wlan: probe of 1-1.3.1.2:2.0 failed with error -71
[2114400.599839] usb-storage 1-1.3.1.2:2.1: USB Mass Storage device detected
[2114400.600254] usb-storage 1-1.3.1.2:2.1: Quirks match for vid 0525 pid a4a5: 10000
[2114400.656387] usb 1-1.3.1.2: USB disconnect, device number 46

If I disable DM_ETH... usb_ether works fine on the board ...

Any ideas?

bye,
Heiko
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