Dear All:
Yes, in future, Huawei 3G modems will more support ECM/NCM/MBIM device,
but not PPP modem.
In generally, there is a ECM/NCM/MBIM interface and several serial
interfaces available(at least there is one serial interface, which is used to
manage the device, called PCUI interface by Huawei).
Currently, ECM/NCM/MBIM interface can support dial-up with both QMI and
AT command at the same time. But in future, ECM/NCM/MBIM interface will more
support to dial up with AT command, but not QMI.
So I advise that now it is time to do same work to make ModemManager
can support AT command dial-up for ECM/NCM/MBIM interface.
The AT commands about the dial-up, it will be sent to device through
the PCUI interface:
1. connect:
AT^NDISDUP=1,1,"apn"[,<"username">,<"password">,<auth_type>]
------username, password and auth_type is optional.
-----auth_type: 0: no auth, 1: PAP, 2: CHAP.
2. disconnect:
AT^NDISDUP=1,0
3. connection state:
1) auto report:(this report is sent by )
<CR><LF> ^NDISSTAT:
<stat>,,,<PDP_type>]<CR><LF><CR><LF>OK<CR><LF>
-----stat: 0 disconnected, 1 connected
-----PDP_type: "IPV4" or "IPV6"
-----such as: ^NDISSTAT:1,,,"IPV4"
^NDISSTAT:0,,,"IPV4"
2) query state:
AT^NDISSTATQRY?
Hope that these information above can help you.
Best Regards,
Franko Fang
-----邮件原件-----
发件人: [email protected]
[mailto:[email protected]] 代表 Bj?rn Mork
发送时间: 2012年11月11日 23:14
收件人: Aleksander Morgado
抄送: Olof Ermis; [email protected]; Tommy Cheng
主题: Re: MM: Non QMI Huawei modems without PPP support?
Aleksander Morgado <[email protected]> writes:
> Hey Bjørn,
>
>>
>> following up the recent discussions on libqmi regarding E3276 I am
>> wondering if these modems could be supported without too much fuzz by
>> ModemManager?
>>
>> This is a typical example of such a device (after adding the
>> necessary match to the cdc_ncm driver):
>>
>> T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
>> D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
>> P: Vendor=12d1 ProdID=1506 Rev= 1.02
>> S: Manufacturer=HUAWEI Technology
>> S: Product=HUAWEI Mobile
>> C:* #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=500mA
>> I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=02 Prot=12 Driver=option
>> E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
>> E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
>> I: If#= 1 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=16 Driver=cdc_ncm
>> E: Ad=82(I) Atr=03(Int.) MxPS= 64 Ivl=2ms
>> I:* If#= 1 Alt= 1 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=16 Driver=cdc_ncm
>> E: Ad=82(I) Atr=03(Int.) MxPS= 64 Ivl=2ms
>> E: Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
>> E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
>> I:* If#= 2 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=
>> E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
>> E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
>> I:* If#= 3 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=
>> E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
>> E: Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
>>
>>
>> So, except for the Mass Storage functions, there is only one serial
>> function and one CDC NCM function available. And according to the
>> Windows drvier inf, the serial function is intended for PCUI. It is
>> used to manage the CDC NCM function, and may not support PPP at
>> all(?)
>>
>> Ideally ModemManager should use the wwanX interface for data and the
>> ttyUSBY device for control, using Huawei vendor specific AT commands
>> to initiate and manage the connection. The known commands specific
>> to network device management are AFAIK
>>
>> connect:
>> AT^NDISDUP=1,1,"apn"
>>
>> disconnect:
>> AT^NDISDUP=1,0
>>
>> check:
>> AT^DHCP?
>>
>> The last command will return all addresses, but the firmware also
>> support running DHCP over the network interface so using these is not
>> necessary . The command is still useful to check whether there is an
>> active connection or not.
>>
>> Is this something which can be supported relatively easy?
>>
>> I do not know how common these devices are, but the E3276 is
>> relatively new so there might be an increasing demand for this. Based
>> on the Windows driver I expect there are also similar devices with a
>> CDC ECM function instead of NCM, but I have not seen any example of those
>> yet.
>> So I have so far only submitted a patch for cdc_ncm.
>>
>>
>
> It should not be very difficult to support these modems.
>
> First, we would need a way to guess whether the huawei modem is one of
> this kind or not. If this modem replies to "AT+CLAC", please send back
> that output.
Since I don't have any such modems, I am hoping Olof or Tommy can help with
this?
> A first try would be to use "AT^NDISDUP=?", assuming that a proper
> reply is given by this modem and not by the others.
That I am pretty sure will not work. AT^NDISDUP is implemented in many other
Huawei modems, including some you will want to support via QMI.
> Just
> wondering, we may actually be able to decide this looking at the
> driver reported?
Probably, using some driver based heuristic like
1) I got a wwanX interface => need some management interface
2) Look at the driver of wwanX to guess what type of management interface
to use:
qmi_wwan => QMI over /dev/cdc-wdmY
cdc_mbim => MBIM over /dev/cdc-wdmY
(cdc_ncm or cdc_ether) and Ericsson => AT*ENAP etc over /dev/cdc-wdmY or
/dev/ttyACMY
(cdc_ncm or cdc_ether) and Huawei => AT^NDISDUP etc over /dev/ttyUSBY
And maybe other combinations you already support? AFAIK, this is pretty much
what you already do e.g. for the Ericsson (aka MBM) modems?
> Are you able to run current git master ModemManager to see how the
> modem behaves w.r.t other things like messaging, registration and
> such? A debug log would be very helpful, as well as the output of "mmcli -m
> 0".
Again, Olof or Tommy?
> Last but not least, if anyone can sponsor a couple of these new
> devices for us to test with, that would be best :-)
Of course. One could hope the vendors stepped in here.
Bjørn
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