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ath79: add support for Arduino Yun
Arduino Yun is a microcontroller development board, based on Atmel ATmega32u4 and Atheros AR9331. Specifications: - MCU: ATmega32U4 - SoC: AR9331 - RAM: DDR2 64MB - Flash: SPI NOR 16MB - WiFi: - 2.4GHz: SoC internal - Ethernet: 1x 10/100Mbps - USB: 1x 2.0 - MicroSD: 1x SDHC Notes: - Stock firmware is based on OpenWrt AA. - The SoC UART can be accessed only through the MCU. YunSerialTerminal is recommended for access to serial console. - Stock firmware uses non-standard 250000 baudrate by default. - The MCU can be reprogrammed from the SoC with avrdude linuxgpio. Installation: 1. Update U-Boot environment variables to adapt to new partition scheme. > setenv bootcmd "run addboard; run addtty; run addparts; run addrootfs; bootm 0x9f050000 || bootm 0x9fea0000" > setenv mtdparts "spi0.0:256k(u-boot)ro,64k(u-boot-env),15936k(firmware),64k(nvram),64k(art)ro" > saveenv 2. Boot into stock firmware normally and perform sysupgrade with sysupgrade image. # sysupgrade -n -F /tmp/sysupgrade.bin Signed-off-by: Sungbo Eo <mans0n@gorani.run>
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@ -14,6 +14,7 @@ board=$(board_name)
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case "$board" in
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alfa-network,ap121f|\
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arduino,yun|\
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buffalo,bhr-4grv2|\
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devolo,magic-2-wifi|\
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engenius,ecb1750|\
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223
target/linux/ath79/dts/ar9331_arduino_yun.dts
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target/linux/ath79/dts/ar9331_arduino_yun.dts
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@ -0,0 +1,223 @@
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// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
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/dts-v1/;
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/input/input.h>
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#include "ar9331.dtsi"
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/ {
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model = "Arduino Yun";
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compatible = "arduino,yun", "qca,ar9331";
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aliases {
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serial0 = &uart;
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};
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chosen {
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bootargs = "console=ttyATH0,250000";
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};
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ahb {
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apb {
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pinmux_extended: pinmux@18040030 {
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compatible = "pinctrl-single";
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reg = <0x18040030 0x4>;
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pinctrl-single,bit-per-mux;
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pinctrl-single,register-width = <32>;
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pinctrl-single,function-mask = <0x1>;
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#pinctrl-cells = <2>;
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enable_gpio11: pinmux_enable_gpio11 {
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pinctrl-single,bits = <0x0 0x200 0x200>;
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};
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};
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pinmux_bootstrap: pinmux@180600ac {
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compatible = "pinctrl-single";
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reg = <0x180600ac 0x4>;
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pinctrl-single,bit-per-mux;
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pinctrl-single,register-width = <32>;
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pinctrl-single,function-mask = <0x1>;
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#pinctrl-cells = <2>;
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enable_gpio26_gpio27: pinmux_enable_gpio26_gpio27 {
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pinctrl-single,bits = <0x0 0x40000 0x40000>;
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};
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};
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};
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};
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leds {
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compatible = "gpio-leds";
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wlan {
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label = "yun:blue:wlan";
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gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
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linux,default-trigger = "phy0tpt";
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};
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usb {
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label = "yun:white:usb";
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gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
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trigger-sources = <&hub_port1>;
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linux,default-trigger = "usbport";
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};
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};
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keys {
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compatible = "gpio-keys";
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config {
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label = "config";
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linux,code = <BTN_0>;
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gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
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};
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};
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gpio-export {
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compatible = "gpio-export";
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gpio_spi_enable {
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gpio-export,name = "yun:oe:spi";
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gpio-export,output = <0>;
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gpios = <&gpio 21 GPIO_ACTIVE_HIGH>;
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};
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gpio_handshake_enable {
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gpio-export,name = "yun:oe:hs";
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gpio-export,output = <0>;
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gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
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};
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gpio_uart_enable {
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gpio-export,name = "yun:oe:uart";
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gpio-export,output = <0>;
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gpios = <&gpio 23 GPIO_ACTIVE_LOW>;
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};
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};
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reg_usb_vbus: reg_usb_vbus {
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compatible = "regulator-fixed";
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regulator-name = "usb_vbus";
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regulator-min-microvolt = <5000000>;
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regulator-max-microvolt = <5000000>;
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enable-active-high;
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};
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};
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&uart {
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status = "okay";
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};
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&gpio {
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status = "okay";
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};
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&pinmux {
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pinctrl-names = "default";
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pinctrl-0 = <&jtag_disable_pins &switch_led_disable_pins>;
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};
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&switch_led_disable_pins {
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pinctrl-single,bits = <0x0 0x80 0xf8>;
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};
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&pinmux_extended {
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pinctrl-names = "default";
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pinctrl-0 = <&enable_gpio11>;
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};
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&pinmux_bootstrap {
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pinctrl-names = "default";
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pinctrl-0 = <&enable_gpio26_gpio27>;
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};
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&usb {
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status = "okay";
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#address-cells = <1>;
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#size-cells = <0>;
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dr_mode = "host";
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vbus-supply = <®_usb_vbus>;
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port@1 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <1>;
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#trigger-source-cells = <0>;
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hub_port1: port@1 {
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reg = <1>;
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#trigger-source-cells = <0>;
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};
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};
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};
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&usb_phy {
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status = "okay";
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};
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&spi {
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status = "okay";
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num-cs = <1>;
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flash@0 {
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compatible = "jedec,spi-nor";
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reg = <0>;
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spi-max-frequency = <50000000>;
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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partition@0 {
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label = "u-boot";
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reg = <0x0 0x40000>;
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read-only;
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};
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partition@40000 {
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label = "u-boot-env";
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reg = <0x40000 0x10000>;
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};
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partition@50000 {
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compatible = "denx,uimage";
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label = "firmware";
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reg = <0x50000 0xf90000>;
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};
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partition@fe0000 {
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label = "nvram";
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reg = <0xfe0000 0x10000>;
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};
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art: partition@ff0000 {
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label = "art";
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reg = <0xff0000 0x10000>;
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read-only;
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};
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};
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};
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};
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ð0 {
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status = "okay";
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};
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ð1 {
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status = "okay";
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compatible = "syscon", "simple-mfd";
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};
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&wmac {
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status = "okay";
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mtd-cal-data = <&art 0x1000>;
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};
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@ -12,6 +12,7 @@ ath79_setup_interfaces()
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adtran,bsap1800-v2|\
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adtran,bsap1840|\
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alfa-network,ap121f|\
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arduino,yun|\
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aruba,ap-105|\
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avm,fritz1750e|\
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avm,fritz300e|\
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@ -361,6 +362,11 @@ ath79_setup_macs()
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alfa-network,ap121f)
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label_mac=$(mtd_get_mac_binary art 0x1002)
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;;
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arduino,yun)
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base_mac=$(mtd_get_mac_binary art 0x1002)
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lan_mac=$(macaddr_setbit $base_mac 29)
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[ $lan_mac = $base_mac ] && lan_mac=$(macaddr_unsetbit $base_mac 29)
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;;
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avm,fritz1750e|\
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avm,fritz450e|\
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avm,fritzdvbc)
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@ -5,6 +5,9 @@ board=$(board_name)
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boardonly="${board##*,}"
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case "$board" in
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arduino,yun)
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migrate_leds "arduino:=yun:"
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;;
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engenius,epg5000)
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migrate_leds ":wlan-2g=:wlan2g" ":wlan-5g=:wlan5g"
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;;
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@ -210,6 +210,17 @@ define Device/alfa-network_ap121f
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endef
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TARGET_DEVICES += alfa-network_ap121f
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define Device/arduino_yun
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SOC := ar9331
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DEVICE_VENDOR := Arduino
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DEVICE_MODEL := Yun
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DEVICE_PACKAGES := kmod-usb2 kmod-usb-chipidea2 kmod-usb-ledtrig-usbport \
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kmod-usb-storage block-mount -swconfig
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IMAGE_SIZE := 15936k
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SUPPORTED_DEVICES += arduino-yun
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endef
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TARGET_DEVICES += arduino_yun
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define Device/aruba_ap-105
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SOC := ar7161
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DEVICE_VENDOR := Aruba
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@ -0,0 +1,54 @@
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From 4d3c17975c7814884a721fe693b3adf5c426d759 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Tue, 10 Nov 2015 22:18:39 +0100
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Subject: [RFC] serial: core: add support for boot console with arbitrary
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baud rates
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The Arduino Yun uses a baud rate of 250000 by default. The serial is
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going over the Atmel ATmega and is used to connect to this chip.
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Without this patch Linux wants to switch the console to 9600 Baud.
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With this patch Linux will use the configured baud rate and not a
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default one specified in uart_register_driver().
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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[rebased to 4.14, slightly reworded commit message]
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Signed-off-by: Sungbo Eo <mans0n@gorani.run>
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---
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drivers/tty/serial/serial_core.c | 6 +++++-
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include/linux/console.h | 1 +
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2 files changed, 6 insertions(+), 1 deletions(-)
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--- a/drivers/tty/serial/serial_core.c
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+++ b/drivers/tty/serial/serial_core.c
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@@ -219,6 +219,8 @@ static int uart_port_startup(struct tty_
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if (retval == 0) {
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if (uart_console(uport) && uport->cons->cflag) {
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tty->termios.c_cflag = uport->cons->cflag;
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+ tty->termios.c_ospeed = uport->cons->baud;
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+ tty->termios.c_ispeed = uport->cons->baud;
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uport->cons->cflag = 0;
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}
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/*
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@@ -2058,8 +2060,10 @@ uart_set_options(struct uart_port *port,
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* Allow the setting of the UART parameters with a NULL console
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* too:
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*/
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- if (co)
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+ if (co) {
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co->cflag = termios.c_cflag;
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+ co->baud = baud;
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+ }
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return 0;
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}
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--- a/include/linux/console.h
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+++ b/include/linux/console.h
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@@ -153,6 +153,7 @@ struct console {
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short flags;
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short index;
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int cflag;
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+ int baud;
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void *data;
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struct console *next;
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};
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@ -0,0 +1,54 @@
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From 4d3c17975c7814884a721fe693b3adf5c426d759 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Tue, 10 Nov 2015 22:18:39 +0100
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Subject: [RFC] serial: core: add support for boot console with arbitrary
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baud rates
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The Arduino Yun uses a baud rate of 250000 by default. The serial is
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going over the Atmel ATmega and is used to connect to this chip.
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Without this patch Linux wants to switch the console to 9600 Baud.
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With this patch Linux will use the configured baud rate and not a
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default one specified in uart_register_driver().
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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[rebased to 4.14, slightly reworded commit message]
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Signed-off-by: Sungbo Eo <mans0n@gorani.run>
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---
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drivers/tty/serial/serial_core.c | 6 +++++-
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include/linux/console.h | 1 +
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2 files changed, 6 insertions(+), 1 deletions(-)
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--- a/drivers/tty/serial/serial_core.c
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+++ b/drivers/tty/serial/serial_core.c
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@@ -220,6 +220,8 @@ static int uart_port_startup(struct tty_
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if (retval == 0) {
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if (uart_console(uport) && uport->cons->cflag) {
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tty->termios.c_cflag = uport->cons->cflag;
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+ tty->termios.c_ospeed = uport->cons->baud;
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+ tty->termios.c_ispeed = uport->cons->baud;
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uport->cons->cflag = 0;
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}
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/*
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@@ -2104,8 +2106,10 @@ uart_set_options(struct uart_port *port,
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* Allow the setting of the UART parameters with a NULL console
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* too:
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*/
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- if (co)
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+ if (co) {
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co->cflag = termios.c_cflag;
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+ co->baud = baud;
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+ }
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return 0;
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}
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--- a/include/linux/console.h
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+++ b/include/linux/console.h
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@@ -153,6 +153,7 @@ struct console {
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short flags;
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short index;
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int cflag;
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+ int baud;
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void *data;
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struct console *next;
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};
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