Hey Stuart,
Thanks for you reply. I agree about [2], it's not as relevant to me
as I previously thought. I've got some updates since my first mail.
Sorry about not including more information before, I wasn't sure how
much to include at the time.
So having is show up as a network device is actually expected and the
preferred way of operating it according to the documentation, reason
being it's a LTE 100 down / 50 up modem and using the PPP interface is
apparently not capable of those speeds. But the kernel without
modification doesn't expose the AT serial interface so I can't connect
to the cell network. From the docs:
For ZM8510/ZM8620/ME3960 LTE modem, although it can use pppd to setup a data
connection, but the speed may be limited, we recommend to uses ECM to setup
data connection
on ZM8510/ZM8620/ME3960 modem.
[...]
ECM interface can be used to setup data call on ZM8510/ZM8620/ME3960 modem.
The
data connection can be setup by following steps:
Step0: switch modem to ECM mode using AT command, then reboot the modem:
AT+ZSWITCH=L
AT+ZRST
Step1: setup data call parameter using AT command +CGDCONT. For example, can
configure
APN “zte.com” using command as below:
AT+CGDCONT=1,”ip”,”zte.com”
Step2: setup ECM data call using AT command +ZECMCALL. For example:
AT+ZECMCALL=1
Step3: start DHCP to get IP and DNS. For example, use command as below:
dhcpcd usb0
Step4:check whether network card get IP/DNS address. For example:
ifconfig
Step5:disconnect ECM data call using blew command:
AT+ZECMCALL=0
Please refer to AT command document for further more information.
Port information from the docs:
+---+---++
| 0 | Ding interface| /dev/ttyUSB0 |
+---+---++
| 1 | AT interface | /dev/ttyUSB1 |
+---+---++
| 2 | Modem interface | /dev/ttyUSB2 |
+---+---++
| 3 | ECM Control interface | New network card |
+---+---+ named usbx/ecmx/ethx, +
| 4 | ECM Data interface| x can be any number. |
+---+---++
| 5 | Adb interface | Used to debug |
docs, so I can send them to individuals if anyone is interested at
look at them more (there's not a whole lot there that I haven't
included that's relevant, but you never know).
This device is based on the Qualcomm MDM9215 which according to [3]
the umsm driver seems like the right direction.
So following the Linux guide, it says to add the device to
/drivers/usb/serial/option.c . I found the somewhat equivalent file
in OpenBSD under /sys/dev/usb/usbdevs [diff1]. I also added it to
/sys/dev/usb/umsm.c [diff2] so that the umsm driver would try to pick
it up. And after a kernel recompile, that worked! Kind of. The umsm
driver sees all 6 devices and picks up 4 serial ports, which is what
I'd expect based on the docs, but I can't access any of the serial
ports, and the previous network interface (cdce0) disappears (also see
[dmesg]):
# cu -l /dev/cuaU0 -s 115200
cu: open(/dev/cuaU0): Input/output error
# cu -l /dev/cuaU0 -s 115200
cu: open(/dev/cuaU0): Input/output error
# cu -l /dev/cuaU1 -s 115200
cu: open(/dev/cuaU1): Input/output error
# cu -l /dev/cuaU2 -s 115200
cu: open(/dev/cuaU2): Input/output error
# cu -l /dev/cuaU3 -s 115200
cu: open(/dev/cuaU3): Input/output error
Note: I've also tried this with several different speeds, all with the
same error. The docs have 115200 listed in the pppd configs.
So basically I'm stuck on the umsm driver, if that is even the correct
driver to be using. I've included my full [dmesg] output this time if
that helps. Thanks again in advanced for any help!
[3] http://marc.info/?l=openbsd-miscm=134311982424455
[diff1]
Index: usbdevs
===
RCS file: /cvs/src/sys/dev/usb/usbdevs,v
retrieving revision 1.623
diff -u -p -r1.623 usbdevs
--- usbdevs 15 Feb 2014 02:16:57 - 1.623
+++ usbdevs 9 Sep 2014 22:41:51 -
@@ -3395,6 +3395,7 @@ product ZTE UMASS_INSTALLER4 0x0083 ZTE
product ZTE MSA110UP 0x0091 ONDA MSA110UP USB MSM modem
productZTE UMASS_INSTALLER20x0103 ZTE USB MSM installer
product ZTE MF112 0x0117 ZTE MF112 HSUPA USB modem
+product ZTE ZM8620 0x0396 ZTE ZM8510/ZM8620/ME3960 USB modem
product ZTE HSUSB 0x1364 ZTE HSUSB
product ZTE UMASS_INSTALLER0x2000 ZTE USB MSM installer
product ZTE AC2746 0xfff1 AC2746 CDMA USB modem
[diff2]
Index: umsm.c
===
RCS file: /cvs/src/sys/dev/usb/umsm.c,v
retrieving revision 1.96
diff -u -p -r1.96 umsm.c
--- umsm.c 13 Dec 2013 17:43:07 - 1.96
+++ umsm.c 9 Sep 2014 22:43:18 -
@@ -176,6 +176,7 @@
