光華商場で DWM-222 なる 4G LTE USB ドングルを買ってきた。
これをそのまま Ubuntu Xenial で使おうかと思ったらうまく動かない。
まずは基本的なところから確認してみると、デフォルトでインストールされている usb-modeswitch コマンドが 2.2.5 と古く、まだ DWM-222 をサポートしていないようだ。
$ dpkg -l usb-modeswitch*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===================================-======================-======================-===========================================================================
ii usb-modeswitch 2.2.5+repack0-1ubuntu1 amd64 mode switching tool for controlling "flip flop" USB devices
ii usb-modeswitch-data 20151101-1 all mode switching data for usb-modeswitch
配布元 (http://www.draisberghof.de/usb_modeswitch/) によれば、現段階の最新版は 2.5.0 で、これは DWM-222 もサポートしているようだ。ということで、手動で最新版 2.5.0 へ置き換えてみる。まずは既存のパッケージを削除してしまう。
$ sudo apt-get remove usb-modeswitch usb-modeswitch-data
それから、最新版 (2.5.0) のソースをダウンロード。
- コマンド : http://www.draisberghof.de/usb_modeswitch/usb-modeswitch-2.5.0.tar.bz2
- ドングルデータ : http://www.draisberghof.de/usb_modeswitch/usb-modeswitch-data-20170205.tar.bz2
まずはコマンド本体から。 make の時に libusb.h が必要になるので、予め libusb-1.0-0-dev パッケージを apt-get しておくこと。
$ sudo apt-get install libusb-1.0-0-dev
$ bzip2 -dc usb-modeswitch-2.5.0.tar.bz2 | tar xvf -
$ cd usb-modeswitch-2.5.0
$ make
$ sudo make install
sed 's_!/usr/bin/tclsh_!'"/usr/bin/tclsh"'_' < usb_modeswitch.tcl > usb_modeswitch_dispatcher
install -D --mode=755 usb_modeswitch /usr/sbin/usb_modeswitch
install -D --mode=755 usb_modeswitch.sh /lib/udev/usb_modeswitch
install -D --mode=644 usb_modeswitch.conf /etc/usb_modeswitch.conf
install -D --mode=644 usb_modeswitch.1 /usr/share/man/man1/usb_modeswitch.1
install -D --mode=644 usb_modeswitch_dispatcher.1 /usr/share/man/man1/usb_modeswitch_dispatcher.1
install -D --mode=755 usb_modeswitch_dispatcher /usr/sbin/usb_modeswitch_dispatcher
install -d /var/lib/usb_modeswitch
test -d /etc/init -a -e /sbin/initctl && install --mode=644 usb-modeswitch-upstart.conf /etc/init || test 1
test -d /etc/systemd/system -a \( -e /usr/bin/systemctl -o -e /bin/systemctl \) && install --mode=644 usb_modeswitch@.service /etc/systemd/system || test 1
次にドングルデータ。これはいきなり make install すれば良い。
$ bzip2 -dc usb-modeswitch-data-20170205.tar.bz2 | tar xvf -
$ cd usb-modeswitch-data-20170205
$ sudo make install
install -d /usr/share/usb_modeswitch
install -d /etc/usb_modeswitch.d
install -D --mode=644 40-usb_modeswitch.rules /lib/udev/rules.d/40-usb_modeswitch.rules
install --mode=644 -t /usr/share/usb_modeswitch ./usb_modeswitch.d/*
ここまでで一応最新版の usb_modeswitch 2.5.0 が動くし、 DWM-222 自身のモードも切り替わるよう (VID:PID=2001:ab00 -> 2001:7e35) なのだが、しかし肝心の 4G 通信用エントリポイントが出てくれない。
そこで Google 先生に相談したところ、こんな情報を得た。
As suspected this is a MediaTek based dongle with the same interface layout as we have seen before and its sister device DWM-221 B1 (2001:7e19) is supported by linux in the serial driver named option and in the net device driver qmi_wwan.
This is how the 6 interfaces are used:
MI_00 D-Link HS-USB Diagnostics (option)
MI_01 D-Link HS-USB Modem (option)
MI_02 D-Link HS-USB AT Port (option)
MI_03 D-Link HS-USB NMEA (option)
MI_04 D-Link HS-USB WWAN Adapter (qmi_wwan)
MI_05 USB Mass Storage Device (usb-storage)
You can add the usb id of your dongle to the option driver and use the dongle as a ppp serial dial-up modem with the cmds:
modprobe option
echo “2001 7e35” > /sys/bus/usb-serial/drivers/option1/new_id
……LOM さんの書き込みから推測するに、この DWM-222 (VID:PID=2001:ab00) が切り替わった先 (VID:PID=2001:7e35) の Descriptors の感じは DWM-221 B1 にそっくりであり、機能的には Linux 上でも多分使えるのだが、但し usb-serial モジュールがその PID (7e35) を知らないので /dev にエントリポイントが出てこない、ということのようだ。さらに手元の Xenial 環境を確認したら、そもそも qmi_wwan モジュールもロードされていない。これらを解決してやる。
$ sudo modprobe qmi_wwan
$ sudo modprobe option
$ echo '2001 7e35' | sudo tee /sys/bus/usb-serial/drivers/option1/new_id
こうしておいて、もう一回 DWM-222 を挿しなおすと……
$ ls /dev | grep ttyU
ttyUSB0
ttyUSB1
ttyUSB2
ttyUSB3
ttyUSB4
……成功 🙂
参考までに、 DWM-222 の変身前と変身後のそれぞれのディスクリプタを以下に示す。
まずは変身前 (VID:PID=2001:ab00) :
$ lsusb -vd 2001:ab00
Bus 003 Device 004: ID 2001:ab00 D-Link Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.01
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x2001 D-Link Corp.
idProduct 0xab00
bcdDevice 2.28
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 4
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 0
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 1
そして変身後 (VID:PID=2001:7e35) :
$ lsusb -vd 2001:7e35
Bus 003 Device 006: ID 2001:7e35 D-Link Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.01
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x2001 D-Link Corp.
idProduct 0x7e35
bcdDevice 2.28
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 232
bNumInterfaces 6
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
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 0
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 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
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 0x02 EP 2 OUT
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 2
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 9
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
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
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x87 EP 7 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
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 0x04 EP 4 OUT
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 4
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x89 EP 9 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 IN
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 0x05 EP 5 OUT
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 5
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
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 0x06 EP 6 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
