Re: [PATCH net-next v6 0/3] The huawei_cdc_ncm driver / E3276 problem

["Pasi Kärkkäinen" <pasik@iki.fi>]

On Thu, Mar 13, 2014 at 04:41:47PM -0500, Dan Williams wrote:
> On Thu, 2014-03-13 at 22:25 +0200, Pasi Kärkkäinen wrote:
> > On Mon, Nov 04, 2013 at 09:50:46AM +0100, Bjørn Mork wrote:
> > > 
> > > [quote Enrico Mioso]
> > > 
> > > So this is a new, revised, edition of the huawei_cdc_ncm.c driver, which 
> > > supports devices resembling the NCM standard, but using it also as a mean 
> > > to encapsulate other protocols, as is the case for the Huawei E3131 and
> > > E3251 modem devices.
> > >
> > 
> > Hello,
> > 
> > I'm trying to use Huawei E3276 4G/LTE USB dongle with Linux 3.13.6 kernel,
> > and thus i'm using the new huawei_cdc_ncm driver.
> > 
> > I'm using the /dev/cdc-wdm0 device to send AT commands to it, and that seems to work,
> > so the dongle seems like it's connected (also the LED on the dongle suggests it's connected).
> > 
> > .. the problem is the wwan0 interface (well, udev renames it to wwp0s26u1u5i1) doesn't work.
> > Launching a dhcp client on the wwp0s26u1u5i1 doesn't get any IP address.
> > 
> > Any tips how to troubleshoot this? 
> 

Hi,

> Which AT commands are you using to start the data connection?
> 

I've been using:

ATQ0 V1 E1 S0=0
AT^NDISDUP=1,1,"internet"
AT^DHCP?


> I believe Huawei says that DHCP on the network port is only supported if
> network port's USB interface has Class 0x2 + SubClass [0x6 | 0xd] +
> Protocol 0x0.
> 

# lsusb | grep -i huawei
Bus 001 Device 010: ID 12d1:1506 Huawei Technologies Co., Ltd. Modem/Networkcard

# lsusb -t
..
        |__ Port 5: Dev 10, If 0, Class=Vendor Specific Class, Driver=option, 480M
        |__ Port 5: Dev 10, If 1, Class=Vendor Specific Class, Driver=huawei_cdc_ncm, 480M
        |__ Port 5: Dev 10, If 2, Class=Mass Storage, Driver=usb-storage, 480M
        |__ Port 5: Dev 10, If 3, Class=Mass Storage, Driver=usb-storage, 480M

Bus 001 Device 010: ID 12d1:1506 Huawei Technologies Co., Ltd. Modem/Networkcard
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x12d1 Huawei Technologies Co., Ltd.
  idProduct          0x1506 Modem/Networkcard
  bcdDevice            1.02
  iManufacturer           2 HUAWEI Technology
  iProduct                1 HUAWEI Mobile
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          173
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          3 Huawei Configuration
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      2
      bInterfaceProtocol     18
      iInterface              0
      ** UNRECOGNIZED:  05 24 00 10 01
      ** UNRECOGNIZED:  04 24 02 02
      ** UNRECOGNIZED:  05 24 01 00 00
      ** UNRECOGNIZED:  06 24 06 00 00 00
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval              32
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval              32
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      2
      bInterfaceProtocol     22
      iInterface              0
      ** UNRECOGNIZED:  05 24 00 10 01
      ** UNRECOGNIZED:  06 24 1a 00 01 1f
      ** UNRECOGNIZED:  0d 24 0f 04 0f 00 00 00 ea 05 03 00 01
      ** UNRECOGNIZED:  05 24 06 01 01
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               5
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      2
      bInterfaceProtocol     22
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               5
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval              32
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval              32
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)


> Lastly, I think the E3276 has a couple of different "modes" that it can
> switch into with usb_modeswitch too, and only some modes expose the
> right network interface.  What modeswitch command is getting sent to the
> device?
> 

This is on Fedora 20. 

Mar 13 23:56:36 localhost logger: usb_modeswitch: using overriding config file /etc/usb_modeswitch.d/12d1:14fe; make sure this is intended
Mar 13 23:56:36 localhost logger: usb_modeswitch: please report any new or corrected settings; otherwise, check for outdated files
Mar 13 23:56:36 localhost usb_modeswitch: switching device 12d1:14fe on 001/009
Mar 13 23:56:37 localhost logger: usb_modeswitch: switched to 12d1:1506 on 001/010

# cat /etc/usb_modeswitch.d/12d1:14fe

# T-Mobile NL (Huawei E352)

TargetVendor=  0x12d1
TargetProductList="1506,150f,151d"

MessageContent="55534243123456780000000000000011062000000100000000000000000000"


# grep -i e3276 /etc/usb_modeswitch.d/*
/etc/usb_modeswitch.d/12d1:156a:# Huawei E3276s-151 and E3251


# cat /etc/usb_modeswitch.d/12d1:156a

# Huawei E3276s-151 and E3251

TargetVendor=  0x12d1
TargetProductList="156b,156c"

MessageContent="55534243123456780000000000000011062000000100000000000000000000"



Hopefully that was enough information.. 

Thanks!

-- Pasi


> Dan
> 
> > I'm seeing "RX errors" listed for the interface in "ifconfig -a" output.. is that normal? 
> > 
> > The device in question is (ATI command output):
> > 
> > Manufacturer: huawei
> > Model: E3276
> > Revision: 21.263.03.00.07
> > IMEI: 863XYZXYZXYZXYZ
> > +GCAP: +CGSM,+DS,+ES
> > 
> > Thanks!
> > 
> > -- Pasi
> > 
> > 
> > > Some precisations are needed however - and I encourage discussion on this: and 
> > > that's why I'm sending this message with a broader CC.
> > > Merging those patches might change:
> > > - the way Modem Manager interacts with those devices
> > > - some regressions might be possible if there are some unknown firmware 
> > >   variants around (Franko?)
> > > 
> > > First of all: I observed the behaviours of two devices.
> > > Huawei E3131: this device doesn't accept NDIS setup requests unless they're 
> > > sent via the embedded AT channel exposed by this driver.
> > > So actually we gain funcionality in this case!
> > > 
> > > The second case, is the Huawei E3251: which works with standard NCM driver, 
> > > still exposing an AT embedded channel. Whith this patch set applied, you gain 
> > > some funcionality, loosing the ability to catch standard NCM events for now.
> > > The device will work in both ways with no problems, but this has to be 
> > > acknowledged and discussed. Might be we can develop this driver further to 
> > > change this, when more devices are tested.
> > > 
> > > We where thinking Huawei changed their interfaces on new devices - but probably 
> > > this driver only works around a nice firmware bug present in E3131, which 
> > > prevented the modem from being used in NDIS mode.
> > > 
> > > I think committing this is definitely wortth-while, since it will allow for 
> > > more Huawei devices to be used without serial connection. Some devices like the 
> > > E3251 also, reports some status information only via the embedded AT channel, 
> > > at least in my case.
> > > Note: I'm not subscribed to any list except the Modem Manager's one, so please 
> > > CC me, thanks!!
> > > 
> > > [/quote]
> > > 
> > > Enrico Mioso (3):
> > >   net: cdc_ncm: Export cdc_ncm_{tx,rx}_fixup functions for re-use
> > >   net: huawei_cdc_ncm: Introduce the huawei_cdc_ncm driver
> > >   net: cdc_ncm: remove non-standard NCM device IDs
> > > 
> > >  drivers/net/usb/Kconfig          |   15 +++
> > >  drivers/net/usb/Makefile         |    1 +
> > >  drivers/net/usb/cdc_ncm.c        |   17 +--
> > >  drivers/net/usb/huawei_cdc_ncm.c |  230 ++++++++++++++++++++++++++++++++++++++
> > >  include/linux/usb/cdc_ncm.h      |    3 +
> > >  5 files changed, 253 insertions(+), 13 deletions(-)
> > >  create mode 100644 drivers/net/usb/huawei_cdc_ncm.c
> > > 
> > > -- 
> > > 1.7.10.4
> > > 
> > > --
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