linux-kernel - Re: [PATCH v2] USB: serial: option: add Quectel EC200A module support

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Message-ID: <20230720113105.20320-1-moh53n@moh53n.ir>
Date:   Thu, 20 Jul 2023 15:00:25 +0330
From:   Mohsen Tahmasebi <moh53n@...53n.ir>
To:     johan@...nel.org
Cc:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, moh53n@...53n.ir, mostafaghrr@...il.com
Subject: Re: [PATCH v2] USB: serial: option: add Quectel EC200A module support

Thanks for the tips Johan, I'll do better next time.
Yes, the device supports RNDIS mode with the same PID and you can switch with a AT command, so I think it should be ECM/RNDIS.

usb-devices output in RNDIS mode:

Bus=01 Lev=02 Prnt=02 Port=03 Cnt=03 Dev#=  6 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=2c7c ProdID=6005 Rev=03.18
S:  Manufacturer=Android
S:  Product=Android
S:  SerialNumber=0000
C:  #Ifs= 5 Cfg#= 1 Atr=e0 MxPwr=500mA
I:  If#=0x0 Alt= 0 #EPs= 1 Cls=e0(wlcon) Sub=01 Prot=03 Driver=rndis_host
I:  If#=0x1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=rndis_host
I:  If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#=0x3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#=0x4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option

usb-devices output in ECM mode:

Bus=01 Lev=02 Prnt=02 Port=03 Cnt=03 Dev#=  6 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=2c7c ProdID=6005 Rev=03.18
S:  Manufacturer=Android
S:  Product=Android
S:  SerialNumber=0000
C:  #Ifs= 5 Cfg#= 1 Atr=e0 MxPwr=500mA
I:  If#=0x0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
I:  If#=0x1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
I:  If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#=0x3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#=0x4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option