[PATCH] ramips: add support for D-Link DAP-X1860 A1

[Hauke Mehrtens]

On 12/13/22 23:15, Sebastian Schaper wrote:
> The DAP-X1860 is a wall-plug AX1800 repeater.
> 
> Specifications:
> - MT7621, 256 MiB RAM, 128 MiB SPI NAND
> - MT7915 + MT7975 2x2 802.11ax (DBDC)
> - Ethernet: 1 port 10/100/1000
> - LED RSSI bargraph (2x green, 1x red/green),
>    incorrectly populated red/orange status LEDs
>    (should be red/green according to documentation)
> 
> Installation:
> - Keep reset button pressed during plug-in
> - Web Recovery Updater is at 192.168.0.50
> - Upload factory.bin, confirm flashing
>    (seems to work best with Chromium-based browsers)
> 
> Revert to OEM firmware:
> - tar -xvf DAP-X1860_RevA_Firmware_101b94.bin
> - openssl enc -d -md md5 -aes-256-cbc -in FWImage.st2 \
>    -out FWImage.st1 -k MB0dBx62oXJXDvt12lETWQ==
> - tar -xvf FWImage.st1
> - flash kernel_DAP-X1860.bin via Recovery
> 
> Signed-off-by: Sebastian Schaper <openwrt at sebastianschaper.net>
> ---
> 
> I am not quite happy with the 4096K fixed-size kernel partition,
> but this is consistent with many other devices using UBI.
> If one day the kernel image will grow larger, this could be addressed
> simultaneously (e.g. using lzma-loader) for all devices.
> 
> Do we even need UBI when there is NMBM? But probably better for redundancy.
> 
> I see there are further options available for `mediatek,nmbm` in dts, i.e.
> `bmt-max-ratio` and `bmt-remap-range`, only used by those two NMBM devices.
> Do we need to set these as well, and how should the values be determined?
> 
> RSSI bargraph is configured for the 5GHz interface `wlan1` to be consistent
> with other devices using the `rssileds` package, however in current master
> this is no longer working, since individual interfaces (e.g. `phy1-sta0`)
> will be created when connecting to a network. It seems this needs to be
> resolved within `rssileds`, rather than individually for this device.
> 
> `uImage-relocate` is based on openwrt/staging/nbd from
> 977e37c0f23e ramips: add work-in-progress support for D-Link DIR-X1860
> 
> 
>   .../ramips/dts/mt7621_dlink_dap-x1860-a1.dts  | 197 ++++++++++++++++++
>   target/linux/ramips/image/mt7621.mk           |  37 ++++
>   .../mt7621/base-files/etc/board.d/01_leds     |   7 +
>   .../mt7621/base-files/etc/board.d/02_network  |   1 +
>   .../etc/hotplug.d/ieee80211/10_fix_wifi_mac   |   7 +
>   .../mt7621/base-files/lib/upgrade/platform.sh |   1 +
>   6 files changed, 250 insertions(+)
>   create mode 100644 target/linux/ramips/dts/mt7621_dlink_dap-x1860-a1.dts
> 
....
> diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
> index 08aa592be8..beae1f929a 100644
> --- a/target/linux/ramips/image/mt7621.mk
> +++ b/target/linux/ramips/image/mt7621.mk
> @@ -14,6 +14,23 @@ ifdef CONFIG_LINUX_5_10
>     DTS_CPPFLAGS += -DDTS_LEGACY
>   endif
>   
> +RELOCATE_LOADADDR = 0x81000000
> +
> +define Build/uImage-relocate
> +	mkimage \
> +		-A $(LINUX_KARCH) \
> +		-O linux \
> +		-T kernel \
> +		-C $(word 1,$(1)) \
> +		-a $(RELOCATE_LOADADDR) \
> +		-e $(RELOCATE_LOADADDR) \
> +		-n '$(if $(UIMAGE_NAME),$(UIMAGE_NAME),$(call toupper,$(LINUX_KARCH)) $(VERSION_DIST) Linux-$(LINUX_VERSION))' \
> +		$(if $(UIMAGE_MAGIC),-M $(UIMAGE_MAGIC)) \
> +		$(wordlist 2,$(words $(1)),$(1)) \
> +		-d $@ $@.new
> +	mv $@.new $@
> +endef
> +

Why do you need uImage-relocate and can not use the standard Build/uImage?
You have to set KERNEL_LOADADDR to  0x81000000.

>   define Build/arcadyan-trx
>   	echo -ne "hsqs" > $@.hsqs
>   	$(eval trx_magic=$(word 1,$(1)))
> @@ -470,6 +487,26 @@ define Device/cudy_x6
>   endef
>   TARGET_DEVICES += cudy_x6
>   
> +define Device/dlink_dap-x1860-a1
> +  $(Device/dsa-migration)
> +  IMAGE_SIZE := 53248k
> +  DEVICE_VENDOR := D-Link
> +  DEVICE_MODEL := DAP-X1860
> +  DEVICE_VARIANT := A1
> +  UBINIZE_OPTS := -E 5
> +  BLOCKSIZE := 128k
> +  PAGESIZE := 2048
> +  KERNEL_SIZE := 4096k
> +  KERNEL := kernel-bin | append-dtb | relocate-kernel | lzma | \
> +	uImage-relocate lzma
> +  IMAGES += factory.bin
> +  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
> +  IMAGE/factory.bin := append-kernel | pad-to $$(KERNEL_SIZE) | append-ubi | \
> +	check-size | elx-header 011b0060 8844A2D168B45A2D
> +  DEVICE_PACKAGES := kmod-mt7915e rssileds
> +endef
> +TARGET_DEVICES += dlink_dap-x1860-a1
> +
>   define Device/dlink_dir-8xx-a1
>     $(Device/dsa-migration)
>     IMAGE_SIZE := 16000k