mirror of
https://github.com/shenmintao/aic8800d80.git
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100 lines
3.0 KiB
Markdown
100 lines
3.0 KiB
Markdown
# Issue #58: legacy firmware test for D80 MCU revision 1
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This branch is an experimental build for
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[issue #58](https://github.com/shenmintao/aic8800d80/issues/58). It is intended
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only for AIC8800D80 devices reported as:
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```text
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chip_id=7, chip_mcu_id=1
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```
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Do not merge this branch as a general firmware downgrade. It replaces the
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complete `fw/aic8800D80` firmware set so that an affected device can test one
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specific hypothesis. Firmware for D80N, D80X2, DC, and other variants is not
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changed.
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## Hypothesis
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The affected device times out when an FMAC upload reaches address `0x170400`.
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With an upload base of `0x120000`, this suggests that the old MCU revision has
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an FMAC RAM window of about `0x50400` (328,704) bytes.
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| Firmware | Size | End address (exclusive) | Result relative to `0x170400` |
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| --- | ---: | ---: | ---: |
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| Current V5 FMAC | 358,072 bytes | `0x1776B8` | 29,368 bytes over |
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| Legacy V3 FMAC in this branch | 327,037 bytes | `0x16FD7D` | 1,667 bytes free |
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This branch uses the complete matching D80 firmware set from Radxa SDK V3,
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fixed at upstream commit
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[`254d47e6a131dbed5ba32131972f4719f3e1c7fe`](https://github.com/radxa-pkg/aic8800/commit/254d47e6a131dbed5ba32131972f4719f3e1c7fe).
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The normal FMAC file has SHA-256
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`1ec680c2b63dcaa0e5d33c5fb6d1857d030f8145c05c385e243760388a61a0da`.
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## Install the test branch
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From an existing clone:
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```bash
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git fetch origin
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git switch test/issue-58-mcu1-legacy-fw
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sudo ./install.sh
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```
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Disconnect and reconnect the USB device after installation. Reboot if the
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device does not re-enumerate cleanly.
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## Verify
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First save the complete kernel log and confirm that firmware upload passes the
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old failure address without a command timeout:
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```bash
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sudo dmesg -C
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# Disconnect and reconnect the device, then wait for initialization.
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sudo dmesg | tee issue58-legacy-fw-dmesg.txt
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sudo dmesg | grep -iE 'aic|chip_id|chip_mcu_id|fmacfw|bin upload|cmd timed-out'
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```
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Please report all of the following, even if an earlier item fails:
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1. The `chip_id` and `chip_mcu_id` lines, and whether firmware upload completes.
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2. Whether nearby SSIDs can be scanned.
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3. Whether Wi-Fi association succeeds.
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4. Whether the interface receives an address by DHCP.
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5. Whether the gateway and an Internet address can be pinged, and whether real
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traffic works.
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6. Whether Bluetooth still enumerates and works through the kernel's standard
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`btusb` driver. This test does not install or use `aic_btusb`.
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Useful commands:
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```bash
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iw dev
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nmcli device wifi list
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ip address
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ip route
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ping -c 4 "$(ip route | awk '/default/ {print $3; exit}')"
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ping -c 4 1.1.1.1
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lsusb -t
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bluetoothctl list
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```
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If NetworkManager is unavailable, identify the interface with `iw dev`, then
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replace `wlan0` below with that interface name:
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```bash
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sudo iw dev wlan0 scan | grep SSID
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```
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## Return to the current V5 firmware
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The installer replaces the firmware under `/lib/firmware`, so merely switching
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Git branches is not enough. Reinstall after returning to `main`:
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```bash
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git switch main
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git pull --ff-only
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sudo ./install.sh
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sudo reboot
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```
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