Initial: BESser umbrella for BES2600 driver mainlining

Sets up the BES2600 mainlining work tree with:

- README: project overview, hardware target, driver lineage
  (CW1200 -> Bestechnic -> arjan-vlek -> Mobian/danctnix), patch series
  status, repo map, build/deploy workflow.

- patches/: c1 patch generated by git format-patch from
  marfrit/bes2600-dkms branch bes2600/factory-request-firmware
  (checkpatch.pl --no-tree --strict: 0 errors / 0 warnings / 0 checks).

- scripts/: build-bes2600-on-ohm.sh, deploy-c1-to-ohm.sh,
  backup-ohm-kernel.sh - reproducible build + deploy + backup.

- fw-analysis/: per-blob strings.txt + fnnames.txt extracted from the
  4 firmware blobs pulled from ohm 2026-04-21. Source binaries NOT
  committed (Bestechnic-proprietary).

- notes/: observed-bugs.md (4 known bug surfaces with file:line +
  patch-series cross-reference), source-map.md (every public driver
  source variant + their canonical role).

Companion work tree: marfrit/bes2600-dkms (Mobian DKMS fork) at
git.reauktion.de.

Signed-off-by: Markus Fritsche <fritsche.markus@gmail.com>

notes/source-map.md

@@ -0,0 +1,77 @@
+# BES2600 driver source map
+
+Inventory of every public driver source variant we found (2026-04-21), their relationships, and where each fits in the patch workflow.
+
+## The trees
+
+### TuxThePenguin0 — pre-removal Android-provenance snapshot
+- **URL**: `gitlab.com/TuxThePenguin0/bes2600`
+- **Files**: 53, flat layout (no subdir)
+- **HEAD**: `5316ef0 Merge branch 'master' into 'master'` (2023-07-14)
+- **Provenance markers** (Android-only files):
+  - `bes2600_cfgvendor.c/.h` — Android nl80211 vendor-cmd HAL interface
+  - `bes2600_driver_mode.h` — Android normal/factory/cali mode switch
+  - `bes2600_log.c/.h` — Android-style ALOGx logger
+- **Use**: reference for "what was originally shipped before community cleanup"
+
+### arjan-vlek — historical home (sources removed)
+- **URL**: `gitlab.com/arjanvlek/bes2600`
+- **master tip**: `3230fbd Simplify README.md` (2024-10) — README only
+- Sources removed in `e5055a3 "Removed sources from main branch"` (2024-10)
+- Pre-removal tip: `a184728 Merge branch 'checkpatch-fixes' into 'master'` (same SHA as TuxThePenguin0's history point)
+
+### Mobian DKMS — active maintained, primary PR target
+- **URL upstream**: `salsa.debian.org/Mobian-team/devices/bes2600-dkms`
+- **Our fork**: `git.reauktion.de/marfrit/bes2600-dkms`
+- **Default branch**: `mobian`
+- **Files**: 61 (Debian packaging layout: `Makefile.dkms` at root + `bes2600/*` source + `debian/`)
+- **HEAD**: `fe73571 d/control: Fix packagename of fw dependency` (2025-12)
+- Adds `Kconfig`, `Makefile`, `bes_pwr.c`, `itp.c`, `bes_log.h`, `bes_nl80211_testmode_msg.h` over TuxThePenguin0
+- Drops Android-provenance files (cfgvendor, driver_mode, ALOG-style logger)
+- **PR mechanism**: salsa.debian.org merge requests
+
+### danctnix in-kernel
+- **URL**: `codeberg.org/DanctNIX/linux-pinetab2`
+- **Tag**: `v6.19.10-danctnix1` matches the running kernel on ohm
+- **Path**: `drivers/staging/bes2600/` (54 files)
+- Adds `bes2600_btuart.c` (Dang Huynh, 2025) + `h4_recv.h` (Intel mainline copy) + `wifi_testmode_cmd.c`
+- Same factory.c / bes_pwr.c / bes2600_sdio.c content as Mobian (verified 0-hunk diffs)
+- **Use**: build target for in-kernel deployment via `/lib/modules/<ver>/extra/`
+
+### CW1200 mainline — ancestor
+- **URL**: `github.com/torvalds/linux/tree/master/drivers/net/wireless/st/cw1200`
+- 27 files, mainline-quality staging-cleaned
+- Same author (Dmitry Tarnyagin / ST-Ericsson)
+- Reference for upstream patterns; some BES2600 bugs may already be fixed in CW1200
+
+### OpenHarmony device_soc_bestechnic — Chinese-ecosystem reference
+- **URL**: `gitee.com/openharmony/device_soc_bestechnic`
+- Apache-2.0 (CANNOT direct-copy to GPL kernel)
+- LiteOS-M + HDF framework, not Linux driver
+- **Use**: register-level reference, firmware interaction protocol docs
+
+### Firmware mirrors (binary blobs only)
+- `github.com/Herrie82/bes2600-firmware` — 2 blobs (boot + sdio main), v0.3.5_2023.0209
+- `gitlab.com/pine64-org/bes2600-firmware` — same blobs
+- **On ohm**: 5 files at `/lib/firmware/bes2600/` (adds `btrf` + `nosignal` variants + `bes2600_factory.txt`)
+
+## Filename-level set diff
+
+43 driver C/H files common across TuxThePenguin0 + Mobian + danctnix
+(the CW1200-descended shared core).
+
+| File | Status |
+|------|--------|
+| `bes2600_cfgvendor.c/.h` | TuxThePenguin0 only (Android HAL) |
+| `bes2600_driver_mode.h` | TuxThePenguin0 only |
+| `bes2600_log.c/.h` | TuxThePenguin0 (renamed → `bes_log.h` in Mobian + danctnix) |
+| `dkms.conf`, `Kconfig` | Mobian only |
+| `bes2600_btuart.c`, `h4_recv.h` | danctnix only (BT integrated in same dir) |
+
+## Workflow
+
+| Goal | Tree | Branch | PR via |
+|------|------|--------|--------|
+| Per-patch dev | `marfrit/bes2600-dkms` | `bes2600/<name>` | salsa MR to upstream Mobian |
+| Live test on ohm | `~/bes2600-build/` (tar from danctnix tree, builds against `linux-pinetab2-headers`) | none | install to `/lib/modules/<ver>/extra/` |
+| Eventual mainline | (rewrite as drivers/staging/bes2600/) | `staging-bes2600` | linux-wireless mailing list RFC |