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uqmi: introduce devpath option
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Introduce the devpath option to find the control channel device from a
hardware path for a USB or a WWAN device.

This option is useful when there are multiple modems connected to the
system. The name of the control channel device of a modem can change
depending on which modem initialises first or if it was recently plugged
in. The devpath option allows specifying the hardware path of the modem
where the control channel device will be found using that.

For the USB device hardware path, it is allowed to specify the USB port
number the modem is directly connected to.

If the device and devpath options are both set, devpath takes precedence
over device.

The USB device hardware path of a control channel device can be found by:

readlink -f /sys/class/usbmisc/cdc-wdmX/device

The WWAN device hardware path of a control channel device can be found by:

readlink -f /sys/class/wwan/wwanXqmiX/device

An example uci configuration would be:

config interface 'wwan_usb1'
	option proto 'qmi'
	option auth 'none'
	option devpath '/sys/devices/platform/1e1c0000.xhci/usb1/1-1'
	option apn 'internet'
	option pdptype 'ipv4v6'

Or:

config interface 'wwan_pcie1'
	option proto 'qmi'
	option auth 'none'
	option devpath '/sys/devices/platform/soc/11280000.pcie/pci0003:00/0003:00:00.0/0003:01:00.0'
	option apn 'internet'
	option pdptype 'ipv4v6'

Signed-off-by: Chester A. Unal <chester.a.unal@arinc9.com>
This commit is contained in:
Chester A. Unal 2026-02-09 12:55:02 +02:00
parent 764c503a2c
commit e83da3bada
1 changed files with 40 additions and 4 deletions
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44
package/network/utils/uqmi/files/lib/netifd/proto/qmi.sh
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@ -21,6 +21,7 @@ proto_qmi_init_config() {
proto_config_add_string pdptype
proto_config_add_int profile
proto_config_add_int v6profile
proto_config_add_string devpath
proto_config_add_boolean dhcp
proto_config_add_boolean dhcpv6
proto_config_add_boolean sourcefilter
@ -46,8 +47,8 @@ proto_qmi_setup() {
local apn auth delay device modes password pdptype pincode username v6apn
json_get_vars apn auth delay device modes password pdptype pincode username v6apn
local profile v6profile dhcp dhcpv6 autoconnect plmn timeout
json_get_vars profile v6profile dhcp dhcpv6 autoconnect plmn timeout
local profile v6profile devpath dhcp dhcpv6 autoconnect plmn timeout
json_get_vars profile v6profile devpath dhcp dhcpv6 autoconnect plmn timeout
[ "$timeout" = "" ] && timeout="10"
@ -55,6 +56,30 @@ proto_qmi_setup() {
[ -n "$ctl_device" ] && device=$ctl_device
if [ -n "$devpath" ]; then
local usbmisc_or_wwan_path
# For usbmisc:
# /sys/devices/platform/1e1c0000.xhci/usb1/1-2/1-2:1.4/usbmisc/cdc-wdm0
# Numbers after ":" are the configuration and interface number
# of the connected modem. There can be multiple interfaces but
# there will only be a single interface that provides the
# control channel device. Therefore, check also /*/usbmisc to
# allow specifying the USB port number the modem is directly
# connected to.
# For wwan:
# /sys/devices/platform/soc/11280000.pcie/pci0003:00/0003:00:00.0/0003:01:00.0/wwan/wwan0/wwan0qmi0
# /sys/devices/platform/soc/11280000.pcie/pci0003:00/0003:00:00.0/0003:01:00.0/mhi0/wwan/wwan0/wwan0qmi0
for usbmisc_or_wwan_path in \
"$devpath"/usbmisc/cdc-wdm* \
"$devpath"/*/usbmisc/cdc-wdm* \
"$devpath"/*/wwan[0-9]*/wwan[0-9]*qmi* \
"$devpath"/*/*/wwan[0-9]*/wwan[0-9]*qmi*; do
[ ! -e "$usbmisc_or_wwan_path" ] && continue
device="/dev/${usbmisc_or_wwan_path##*/}"
break
done
fi
[ -n "$device" ] || {
echo "No control device specified"
proto_notify_error "$interface" NO_DEVICE
@ -519,11 +544,22 @@ qmi_wds_stop() {
proto_qmi_teardown() {
local interface="$1"
local device cid_4 pdh_4 cid_6 pdh_6
json_get_vars device
local device devpath cid_4 pdh_4 cid_6 pdh_6
json_get_vars device devpath
[ -n "$ctl_device" ] && device=$ctl_device
if [ -n "$devpath" ]; then
local usbmisc_or_wwan_path
for usbmisc_or_wwan_path in \
"$devpath"/usbmisc/cdc-wdm* \
"$devpath"/*/usbmisc/cdc-wdm* \
"$devpath"/*/wwan[0-9]*/wwan[0-9]*qmi* \
"$devpath"/*/*/wwan[0-9]*/wwan[0-9]*qmi*; do
device="/dev/${usbmisc_or_wwan_path##*/}"
done
fi
echo "Stopping network $interface"
json_load "$(ubus call network.interface.$interface status)"