drivers/aic8800d80
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feat: unify Bluetooth support and add ZLP quirk

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Shen Mintao
2026-07-25 15:49:53 +08:00
parent 6550131e18
commit 13baa9b0b1
14 changed files with 267 additions and 101 deletions
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README.md
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@@ -10,8 +10,8 @@ This driver is for the AIC8800D80 chipset, supported by devices such as the Tend
> to avoid the deterministic firmware upload timeout at `0x170400`. Use
> `main` when `chip_mcu_id=0` or when the MCU revision is unknown.
>
> Hardware revision takes precedence over the Bluetooth feature branch. MCU1
> devices should remain on `legacy-mcu1`, which initializes Bluetooth for the
> Hardware revision determines the firmware branch. MCU1 devices should use
> `legacy-mcu1`, which also initializes Bluetooth for the
> kernel's standard `btusb` driver. After switching branches, rerun
> `sudo ./install.sh` and reboot; switching the Git branch alone does not
> replace the firmware already installed under `/lib/firmware`.
@@ -25,6 +25,13 @@ adapters. On combo devices, `aic_load_fw` uploads the AIC firmware and the
standard Linux `btusb` driver handles the Bluetooth HCI interface. The obsolete
custom `aic_btusb` module is not used.
USB device `368b:8d81` also uses the bundled `aic_zlp_quirk` companion module.
It adds the Bluetooth ACL bulk TX zero-length-packet behavior validated in
[issue #63](https://github.com/shenmintao/aic8800d80/issues/63), while leaving
the distribution's original `btusb.ko` installed and bound to the device. The
quirk is filtered to that VID:PID and fails closed when the required kernel
probe support is unavailable.
### Disclaimer
I did not develop this software, The code is sourced from the Tenda U11 driver. I only made some modifications to the code to adapt it to newer kernel versions. Apart from compilation issues, I am unable to address other problems.
@@ -126,7 +133,7 @@ interface, so the Bluetooth path remains inactive.
Verify the expected modules and controller with:
```bash
lsmod | grep -E 'aic_load_fw|aic8800_fdrv|btusb'
lsmod | grep -E 'aic_load_fw|aic8800_fdrv|aic_zlp_quirk|btusb'
lsusb -t
bluetoothctl list
```
@@ -152,3 +159,16 @@ The installer removes active references to the retired `aic_btusb` integration.
It does not force-load `btusb` or globally change the Bluetooth rfkill state;
normal kernel device matching and the user's system policy remain in control.
For `368b:8d81`, verify the ZLP hook and its injection counter while Bluetooth
traffic is active:
```bash
cat /sys/module/aic_zlp_quirk/parameters/hook
cat /sys/module/aic_zlp_quirk/parameters/injections
```
The Wi-Fi-reset recovery behavior tracked in
[issue #53](https://github.com/shenmintao/aic8800d80/issues/53) remains a known
limitation: after an airplane-mode or hotspot reset, Bluetooth may require a
physical unplug/replug of the adapter.