Re: serial: usb: cdc-acm: OMRON B5L ToF, device probe failed

[Chris Ruehl <chris.ruehl@gtsys.com.hk>]

On 25/6/2022 10:35 am, Chris Ruehl wrote:
>
> On 23/6/2022 5:39 pm, Oliver Neukum wrote:
>>
>> On 23.06.22 10:55, Chris Ruehl wrote:
>>>
>>> On 23/6/2022 4:44 pm, Chris Ruehl wrote:
>>>> On 23/6/2022 4:28 pm, Oliver Neukum wrote:
>>>>> if you absolutely want it to be driven from CDC-ACM, try this
>>>>> new attached patch.
>>>>> In your original patch you used NO_UNION_NORMAL. That will allow
>>>>> a device to work without a union descriptor but with the normal
>>>>> two interfaces. This devices has what in terms of ACM is a collapsed
>>>>> interface without a union descriptor.
>>>>> The driver provides for that but then it checks for the exact
>>>>> number of required endpoints, which is three. Your device has
>>>>> four endpoints.
>>>>> The patch ignores a fourth endpoint.
>>> Apply the patch ,
>>> still no /dev/ttyACM0 comes up.
>> Hi,
>>
>> please send me dmesg. This should not happen.
>>
>>     Regards
>>         Oliver
>>
> Hi,
> sorry for let you wait but I had a bunch of testing with the b5l to deliver
> my solution to the team.
>
> here the dmesg after apply your patch & NO_NORMAL_UNION
>
> [266005.246312] usb 2-1.4.4.1: new high-speed USB device number 19 using ehci-pci
> [266005.344658] usb 2-1.4.4.1: New USB device found, idVendor=0590, 
> idProduct=00ca, bcdDevice= 2.00
> [266005.344666] usb 2-1.4.4.1: New USB device strings: Mfr=1, Product=2, 
> SerialNumber=3
> [266005.344670] usb 2-1.4.4.1: Product: OMRON B5L-001011
> [266005.344673] usb 2-1.4.4.1: Manufacturer: OMRON Corporation
> [266005.344675] usb 2-1.4.4.1: SerialNumber: 010000319A1
> [266005.458809] usbcore: registered new interface driver cdc_acm
> [266005.458814] cdc_acm: USB Abstract Control Model driver for USB modems and 
> ISDN adapters
>
> T:  Bus=02 Lev=04 Prnt=05 Port=00 Cnt=01 Dev#= 19 Spd=480  MxCh= 0
> D:  Ver= 2.00 Cls=02(comm.) Sub=02 Prot=00 MxPS=64 #Cfgs=  1
> P:  Vendor=0590 ProdID=00ca Rev= 2.00
> S:  Manufacturer=OMRON Corporation
> S:  Product=OMRON B5L-001011
> S:  SerialNumber=010000319A1
> C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=  4mA
> I:* If#= 0 Alt= 0 #EPs= 4 Cls=02(comm.) Sub=02 Prot=00 Driver=(none)
> E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=03(O) Atr=03(Int.) MxPS=  64 Ivl=4096ms
> E:  Ad=84(I) Atr=03(Int.) MxPS=  64 Ivl=4096ms
>
> -Chris
>

The Arduino and the I/O of 3 channels with a working interface to compare.

T:  Bus=02 Lev=03 Prnt=04 Port=01 Cnt=02 Dev#= 20 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=2341 ProdID=0042 Rev= 0.01
S:  Manufacturer=Arduino (www.arduino.cc)
S:  SerialNumber=850363135303517102C0
C:* #Ifs= 2 Cfg#= 1 Atr=c0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=cdc_acm
E:  Ad=82(I) Atr=03(Int.) MxPS=   8 Ivl=255ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm
E:  Ad=04(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms



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