[source] ramips: add support for Vonets VAR11N-300

LEDE Commits lede-commits at lists.infradead.org
Wed Dec 20 16:06:22 PST 2017 

mkresin pushed a commit to source.git, branch master:
https://git.lede-project.org/fe6f298b07941758a759354c6751188c825c5ffb

commit fe6f298b07941758a759354c6751188c825c5ffb
Author: Andrew Crawley <acrawley at gmail.com>
AuthorDate: Thu Nov 23 23:52:13 2017 +0000

    ramips: add support for Vonets VAR11N-300
    
    The VAR11N-300 is a tiny wireless-N device with a hardwired Ethernet
    cable, one extra Ethernet port, and an internal antenna, based on the
    MediaTek MT7620n chipset.
    
    Specs:
    - MT7620n WiSoC @ 600MHz
    - 32 MB SDRAM
    - 4 MB SPI flash
    - 2T2R 2.4GHz WiFi-N
    - 1 attached 10/100 Ethernet cable (LAN)
    - 1 10/100 Ethernet port (WAN)
    - 1 attached USB / barrel 5vdc power cable
    - 5 LEDs (see notes below)
    - 1 reset button
    - 1 UART (3 pads on board)
    
    Installation:
    
    The stock firmware does not support uploading new firmware directly,
    only checking the manufacturer's site for updates.  This process may be
    possible to spoof, but the update check uses some kind of homebrew
    encryption that I didn't investigate.  Instead, you can install via a
    backdoor:
    
    1. Set up a TFTP server to serve the firmware binary
    (lede-ramips-mt7620-var11n-300-squashfs-sysupgrade.bin)
    2. Factory reset the device by holding the reset button for a few
    seconds.
    3. Open the web interface (default IP: 192.168.253.254)
    4. Log in with the "super admin" credentials: username `vonets`,
    password `vonets26642519`.
    5. On the "Operative Status" page, click the text "System Uptime", then
    quickly click the uptime value.
    6. If successful, an alert dialog will appear reading "Ated start", and
    the device will now accept telnet connections.  If the alert does not
    appear, repeat step 5 until it works (the timing is a bit tricky).
    7. Telnet to the device using credentials "admin / admin"
    8. Retrieve the firmware binary from the tftp server: `tftp -l lede.bin
    -r lede-ramips-mt7620-var11n-300-squashfs-sysupgrade.bin -g
    <tftp-server-ip>`
    9. Write the firmware to flash: `mtd_write write lede.bin /dev/mtd4`
    10. Reboot
    
    Tested:
    - LAN / WAN ethernet
    - WiFi
    - LAN / WAN / status LED GPIOs (see notes below)
    - Reset button
    - Sysupgrade
    
    Notes:
    
    LEDs:
    
    The board has 5 LEDs - two green LEDs for LAN / WAN activity, one blue
    LED for WiFi, and a pair of "status" LEDs connected to the same GPIO
    (the blue LED lights when the GPIO is low, and the green when it's
    high).  I was unable to determine how to operate the WiFi LED, as it
    does not appear to be controlled by a GPIO directly.
    
    Recovery:
    
    The default U-boot installation will only boot from flash due to a
    missing environment block.  I generated a valid 4KB env block using
    U-boot's `fw_setenv` tool and wrote it to flash at 0x30000 using an
    external programmer.  After this, it was possible to enter the U-boot
    commandline interface and download a new image via TFTP (`tftpboot
    81b00000 <image-filename>`), but while I could boot this image
    sucessfully (`bootm`), writing it to flash (`cp.linux`) just corrupted
    the flash chip.  The sysupgrade file can be written to flash at 0x50000
    using an external programmer.
    
    Signed-off-by: Andrew Crawley <acrawley at gmail.com>
---
 .../linux/ramips/base-files/etc/board.d/02_network |  4 +
 target/linux/ramips/base-files/etc/diag.sh         |  3 +-
 .../ramips/base-files/lib/upgrade/platform.sh      |  1 +
 target/linux/ramips/dts/VAR11N-300.dts             | 90 ++++++++++++++++++++++
 target/linux/ramips/image/mt7620.mk                |  8 ++
 5 files changed, 105 insertions(+), 1 deletion(-)

diff --git a/target/linux/ramips/base-files/etc/board.d/02_network b/target/linux/ramips/base-files/etc/board.d/02_network
index e47a43e..947b0dd 100755
--- a/target/linux/ramips/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/base-files/etc/board.d/02_network
@@ -313,6 +313,10 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"1:lan" "2:lan" "3:lan" "4:lan" "5:wan" "0 at eth0"
 		;;
+	vonets,var11n-300)
+		ucidef_add_switch "switch0" \
+			"0:lan" "4:wan" "6 at eth0"
+		;;
 	vocore2|\
 	vocore2lite)
 		ucidef_add_switch "switch0" \
diff --git a/target/linux/ramips/base-files/etc/diag.sh b/target/linux/ramips/base-files/etc/diag.sh
index 570fba2..1d4b0ef 100644
--- a/target/linux/ramips/base-files/etc/diag.sh
+++ b/target/linux/ramips/base-files/etc/diag.sh
@@ -160,7 +160,8 @@ get_status_led() {
 	jhr-n805r|\
 	jhr-n926r|\
 	mlw221|\
-	mlwg2)
+	mlwg2|\
+	vonets,var11n-300)
 		status_led="$boardname:blue:system"
 		;;
 	hc5962)
diff --git a/target/linux/ramips/base-files/lib/upgrade/platform.sh b/target/linux/ramips/base-files/lib/upgrade/platform.sh
index 5f2c4a0..d95dcfe 100755
--- a/target/linux/ramips/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ramips/base-files/lib/upgrade/platform.sh
@@ -150,6 +150,7 @@ platform_check_image() {
 	ur-326n4g|\
 	ur-336un|\
 	v22rw-2x2|\
+	vonets,var11n-300|\
 	vocore-8M|\
 	vocore-16M|\
 	vocore2|\
diff --git a/target/linux/ramips/dts/VAR11N-300.dts b/target/linux/ramips/dts/VAR11N-300.dts
new file mode 100644
index 0000000..54bcb3d
--- /dev/null
+++ b/target/linux/ramips/dts/VAR11N-300.dts
@@ -0,0 +1,90 @@
+/dts-v1/;
+
+#include "mt7620n.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "vonets,var11n-300", "ralink,mt7620n-soc";
+	model = "Vonets VAR11N-300";
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		system {
+			label = "var11n-300:blue:system";
+			gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+
+	m25p80 at 0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+
+		partition at 0 {
+			label = "u-boot";
+			reg = <0x0 0x30000>;
+			read-only;
+		};
+
+		partition at 30000 {
+			label = "u-boot-env";
+			reg = <0x30000 0x10000>;
+			read-only;
+		};
+
+		factory: partition at 40000 {
+			label = "factory";
+			reg = <0x40000 0x10000>;
+			read-only;
+		};
+
+		partition at 50000 {
+			label = "firmware";
+			reg = <0x50000 0x3b0000>;
+		};
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0x4>;
+	mediatek,portmap = "llllw";
+};
+
+&wmac {
+	ralink,mtd-eeprom = <&factory 0>;
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		default {
+			ralink,group = "i2c";
+			ralink,function = "gpio";
+		};
+	};
+};
diff --git a/target/linux/ramips/image/mt7620.mk b/target/linux/ramips/image/mt7620.mk
index 229ccf8..902677f 100644
--- a/target/linux/ramips/image/mt7620.mk
+++ b/target/linux/ramips/image/mt7620.mk
@@ -424,6 +424,14 @@ define Device/tiny-ac
 endef
 TARGET_DEVICES += tiny-ac
 
+define Device/vonets_var11n-300
+  DTS := VAR11N-300
+  IMAGE_SIZE := $(ralink_default_fw_size_4M)
+  BLOCKSIZE := 4k
+  DEVICE_TITLE := Vonets VAR11N-300
+endef
+TARGET_DEVICES += vonets_var11n-300
+
 define Device/whr-1166d
   DTS := WHR-1166D
   IMAGE_SIZE := 15040k

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