I'm using T-CPE1200K ( MT7621AT SoC ) and built-in Quectel-EC25-EC as LTE chip.
I used OpenWRT build environment to build for MT7621 target, with all known USB, CDC, QMI, and so on ...
after flashing, device boot and working good but Quectel-EC25-EC is not detected, I tried to add USB or any other USB drivers but no success,
root@OpenWRT:~# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@OpenWRT:~# echo "0x2c7c 0x0125" > /sys/bus/usb-serial/drivers/generic/new_id
root@OpenWRT:~# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@OpenWRT:~# ls /dev/
autofs mtd3ro net
bus mtd4 network_latency
console mtd4ro network_throughput
cpu_dma_latency mtd5 null
full mtd5ro port
fuse mtd6 ppp
gpiochip0 mtd6ro ptmx
gpiochip1 mtdblock0 pts
gpiochip2 mtdblock1 random
kmsg mtdblock2 shm
log mtdblock3 tty
mem mtdblock4 ttyS0
memory_bandwidth mtdblock5 ttyS1
mtd0 mtdblock6 ttyS2
mtd0ro natcap_ctl ubi_ctrl
mtd1 natcap_peer_ctl urandom
mtd1ro natflow_ctl watchdog
mtd2 natflow_ktun_ctl watchdog0
mtd2ro natflow_user_ctl watchdog1
mtd3 natflow_zone_ctl zero
I have GobiNet driver but I don't know how to add these files to the OpenWRT Build Environment,
Can you please help me to add this GobiNet driver and Connect Manager to the Build environment?
No USB driver is going to help if the device doesn't show up here. It is not connected to any USB bus. It is either physically disconnected or powered down. If the router with modem worked before you installed OpenWrt, then my guess is that there is a GPIO controlling power to the modem slot.
To compile the gobi drivers try putting the source code into the package directory of OpenWrt, then run ./scrips feeds update -a && ./scripts feeds install -a then pick them from menu config.
It defines 3 gpio_export pins which all seem relevant to the modem named "pd8_switch_ec20"; "pd9_reset_ec20"; and "4v_en". You obviously have a newer modem, but those GPIOs contrlolling the modem are probably the same. I assume you'll need to enable them all to turn the modem on. Or maybe not the "switch" thing? I have no idea what that does.
root@OpenWrt:~# cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-31, parent: platform/1e000600.gpio, 1e000600.gpio:
gpio-7 ( |xwrt:blue:wifi ) out lo
gpio-8 ( |xwrt:blue:wps ) out lo
gpio-10 ( |xwrt:blue:eth ) out hi
gpio-12 ( |wps ) in hi
gpio-18 ( |reset ) in hi
gpio-22 ( |xwrt:blue:lte_2g ) out hi
gpio-23 ( |4v_en ) out hi
gpio-24 ( |pd9_reset_ec20 ) out hi
gpio-25 ( |pd8_switch_ec20 ) out hi
gpio-26 ( |xwrt:blue:lte_4g ) out hi
gpio-27 ( |xwrt:blue:lte_3g ) out hi
gpio-28 ( |xwrt:blue:rssi3 ) out hi
gpio-29 ( |xwrt:blue:rssi2 ) out hi
gpio-30 ( |xwrt:blue:rssi1 ) out hi
gpiochip1: GPIOs 32-63, parent: platform/1e000600.gpio, 1e000600.gpio:
gpio-32 ( |xwrt:blue:rssi4 ) out hi
gpio-33 ( |xwrt:blue:rssi5 ) out hi
gpiochip2: GPIOs 64-95, parent: platform/1e000600.gpio, 1e000600.gpio: