60 lines
2.7 KiB
Bash
Executable File
60 lines
2.7 KiB
Bash
Executable File
#!/usr/bin/env nix-shell
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#!nix-shell -i bash -p coreutils -p findutils -p gnugrep -p rtl8723cs-wowlan -p time -p util-linux
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# yeah, this isn't technically a hook, but the hook infrastructure isn't actually
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# restricted to stuff that starts with sxmo_hook_ ...
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#
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# this script is only called by sxmo_autosuspend, which is small, so if i wanted to
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# be more proper i could instead re-implement autosuspend + integrations.
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#
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# N.B.: if any wake locks are acquired between invocation of this script and the
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# rtcwake call below, suspend will fail -- even if those locks are released during
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# the same period.
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#
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# this is because the caller of this script writes /sys/power/wakeup_count, and the
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# kernel checks consistency with that during the actual suspend request.
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# see: <https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-power>
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#
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# for this reason, keep this script as short as possible.
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#
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# common sources of wakelocks (which one may wish to reduce) include:
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# - `sxmo_led.sh blink` (every 2s, by default)
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suspend_time=300
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# TODO: don't do this wowlan stuff every single time.
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# - it's costly (can take like 1sec)
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# - it seems to actually block suspension quite often
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# - possibly rtl8723cs takes time to apply wowlan changes during which suspension is impossible
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# alternative is to introduce some layer of cache:
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# - do so in a way such that WiFi connection state changes invalidate the cache
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# - because wowlan enable w/o connection may well behave differently than w/ connection
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# - calculating IP addr from link, and then caching on the args we call our helper with may well suffice
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doas rtl8723cs-wowlan enable-clean
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# wake on ssh
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doas rtl8723cs-wowlan tcp --dest-port 22 --dest-ip SELF
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# wake on notification (ntfy/Universal Push)
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doas rtl8723cs-wowlan tcp --source-port 2587 --dest-ip SELF
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# wake if someone doesn't know how to route to us, because that could obstruct the above
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# doas rtl8723cs-wowlan arp --dest-ip SELF
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# specifically wake upon ARP request via the broadcast address.
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# should in theory by covered by the above (TODO: remove this!), but for now hopefully helps wake-on-lan be more reliable?
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doas rtl8723cs-wowlan arp --dest-ip SELF --dest-mac ff:ff:ff:ff:ff:ff
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# TODO: wake for Dino (call) traffic
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echo "calling suspend for duration: $suspend_time"
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time_start="$(date "+%s")"
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irq_start="$(cat /proc/interrupts | grep 'rtw_wifi_gpio_wakeup' | tr -s ' ' | xargs echo | cut -d' ' -f 2)"
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rtcwake -m mem -s "$suspend_time" || exit 1
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irq_end="$(cat /proc/interrupts | grep 'rtw_wifi_gpio_wakeup' | tr -s ' ' | xargs echo | cut -d' ' -f 2)"
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time_spent="$(( $(date "+%s") - time_start ))"
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echo "suspended for $time_spent seconds. wifi IRQ count: ${irq_start} -> ${irq_end}"
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sxmo_hook_postwake.sh
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