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wwan: hook usb-modeswitch to uevent

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This commit is contained in:
Daniel Barlow 2024-05-26 17:43:25 +01:00
parent e815f61bb5
commit e0bd7aec1e
1 changed files with 36 additions and 12 deletions
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48
modules/cdc-ncm/wwan.nix
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@ -4,10 +4,11 @@
, ppp , ppp
, lib , lib
, svc , svc
, uevent-watch
}: }:
{ apn, username, password, authType }: { apn, username, password, authType }:
let let
inherit (liminix.services) oneshot; inherit (liminix.services) bundle longrun oneshot;
authTypeNum = if authType == "pap" then "1" else "2"; authTypeNum = if authType == "pap" then "1" else "2";
chat = lib.escapeShellArgs [ chat = lib.escapeShellArgs [
# Your usb modem thing might present as a tty that you run PPP # Your usb modem thing might present as a tty that you run PPP
@ -27,21 +28,44 @@ let
# start the thing (I am choosing to read this as "NDIS DialUP") # start the thing (I am choosing to read this as "NDIS DialUP")
"OK" "AT\\^NDISDUP=1,1" "OK" "AT\\^NDISDUP=1,1"
]; ];
modemConfig = oneshot { modeswitch = oneshot {
name = "modem-configure"; name = "modem-modeswitch";
# this is currently only going to work if there is one
# modem only plugged in, it is plugged in already at boot,
# and nothing else is providing a USB tty.
# https://stackoverflow.com/questions/5477882/how-to-i-detect-whether-a-tty-belonging-to-a-gsm-3g-modem-is-a-data-or-control-p
up = '' up = ''
sleep 2
${usb-modeswitch}/bin/usb_modeswitch -v 12d1 -p 14fe --huawei-new-mode ${usb-modeswitch}/bin/usb_modeswitch -v 12d1 -p 14fe --huawei-new-mode
sleep 5 ln -s /dev/ttyUSB0 /dev/modem
${ppp}/bin/chat -s -v ${chat} 0<>/dev/ttyUSB0 1>&0
''; '';
down = "chat -v '' ATZ OK </dev/ttyUSB0 >&0"; };
atz = oneshot {
name = "modem-atz";
# timeout-up = 180;
dependencies = [ modeswitch ];
up = ''
sleep 3
ls -l /dev/modem
${ppp}/bin/chat -s -v ${chat} 0<>/dev/modem 1>&0
'';
down = "${ppp}/bin/chat -v '' ATZ OK 0<>/dev/modem 1>&0";
};
setup = bundle {
name = "modemm-mm-mm-mm";
contents = [
(longrun {
name = "watch-for-usb-modeswitch";
isTrigger = true;
buildInputs = [ modeswitch ];
run = "${uevent-watch}/bin/uevent-watch -s ${modeswitch.name} devtype=usb_device product=12d1/14fe/102";
})
atz
# (longrun {
# name = "watch-for-modem";
# isTrigger = true;
# timeout-up = 180;
# buildInputs = [ atz ];
# run = "sleep 120; ${uevent-watch}/bin/uevent-watch -n /dev/ttyUSB0 -s ${atz.name} devtype=usb_device product=12d1/1506/102";
# })
];
}; };
in svc.network.link.build { in svc.network.link.build {
ifname = "wwan0"; ifname = "wwan0";
dependencies = [ modemConfig ]; dependencies = [ setup ];
} }