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ath79: add support for Arduino Yun

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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>
master
Sungbo Eo 4 years ago committed by Petr Štetiar
parent dc61e3b7ff
commit 358aec7775
7 changed files with 352 additions and 0 deletions
Show Stats Download Patch File Download Diff File

1
package/boot/uboot-envtools/files/ath79
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@ -14,6 +14,7 @@ board=$(board_name)
case "$board" in
alfa-network,ap121f|\
arduino,yun|\
buffalo,bhr-4grv2|\
devolo,magic-2-wifi|\
engenius,ecb1750|\

223
target/linux/ath79/dts/ar9331_arduino_yun.dts
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@ -0,0 +1,223 @@
// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
/dts-v1/;
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include "ar9331.dtsi"
/ {
model = "Arduino Yun";
compatible = "arduino,yun", "qca,ar9331";
aliases {
serial0 = &uart;
};
chosen {
bootargs = "console=ttyATH0,250000";
};
ahb {
apb {
pinmux_extended: pinmux@18040030 {
compatible = "pinctrl-single";
reg = <0x18040030 0x4>;
pinctrl-single,bit-per-mux;
pinctrl-single,register-width = <32>;
pinctrl-single,function-mask = <0x1>;
#pinctrl-cells = <2>;
enable_gpio11: pinmux_enable_gpio11 {
pinctrl-single,bits = <0x0 0x200 0x200>;
};
};
pinmux_bootstrap: pinmux@180600ac {
compatible = "pinctrl-single";
reg = <0x180600ac 0x4>;
pinctrl-single,bit-per-mux;
pinctrl-single,register-width = <32>;
pinctrl-single,function-mask = <0x1>;
#pinctrl-cells = <2>;
enable_gpio26_gpio27: pinmux_enable_gpio26_gpio27 {
pinctrl-single,bits = <0x0 0x40000 0x40000>;
};
};
};
};
leds {
compatible = "gpio-leds";
wlan {
label = "yun:blue:wlan";
gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "phy0tpt";
};
usb {
label = "yun:white:usb";
gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
trigger-sources = <&hub_port1>;
linux,default-trigger = "usbport";
};
};
keys {
compatible = "gpio-keys";
config {
label = "config";
linux,code = <BTN_0>;
gpios = <&gpio 20 GPIO_ACTIVE_LOW>;
};
};
gpio-export {
compatible = "gpio-export";
gpio_spi_enable {
gpio-export,name = "yun:oe:spi";
gpio-export,output = <0>;
gpios = <&gpio 21 GPIO_ACTIVE_HIGH>;
};
gpio_handshake_enable {
gpio-export,name = "yun:oe:hs";
gpio-export,output = <0>;
gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
};
gpio_uart_enable {
gpio-export,name = "yun:oe:uart";
gpio-export,output = <0>;
gpios = <&gpio 23 GPIO_ACTIVE_LOW>;
};
};
reg_usb_vbus: reg_usb_vbus {
compatible = "regulator-fixed";
regulator-name = "usb_vbus";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
enable-active-high;
};
};
&uart {
status = "okay";
};
&gpio {
status = "okay";
};
&pinmux {
pinctrl-names = "default";
pinctrl-0 = <&jtag_disable_pins &switch_led_disable_pins>;
};
&switch_led_disable_pins {
pinctrl-single,bits = <0x0 0x80 0xf8>;
};
&pinmux_extended {
pinctrl-names = "default";
pinctrl-0 = <&enable_gpio11>;
};
&pinmux_bootstrap {
pinctrl-names = "default";
pinctrl-0 = <&enable_gpio26_gpio27>;
};
&usb {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
dr_mode = "host";
vbus-supply = <&reg_usb_vbus>;
port@1 {
#address-cells = <1>;
#size-cells = <0>;
reg = <1>;
#trigger-source-cells = <0>;
hub_port1: port@1 {
reg = <1>;
#trigger-source-cells = <0>;
};
};
};
&usb_phy {
status = "okay";
};
&spi {
status = "okay";
num-cs = <1>;
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <50000000>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "u-boot";
reg = <0x0 0x40000>;
read-only;
};
partition@40000 {
label = "u-boot-env";
reg = <0x40000 0x10000>;
};
partition@50000 {
compatible = "denx,uimage";
label = "firmware";
reg = <0x50000 0xf90000>;
};
partition@fe0000 {
label = "nvram";
reg = <0xfe0000 0x10000>;
};
art: partition@ff0000 {
label = "art";
reg = <0xff0000 0x10000>;
read-only;
};
};
};
};
&eth0 {
status = "okay";
};
&eth1 {
status = "okay";
compatible = "syscon", "simple-mfd";
};
&wmac {
status = "okay";
mtd-cal-data = <&art 0x1000>;
};

6
target/linux/ath79/generic/base-files/etc/board.d/02_network
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@ -12,6 +12,7 @@ ath79_setup_interfaces()
adtran,bsap1800-v2|\
adtran,bsap1840|\
alfa-network,ap121f|\
arduino,yun|\
aruba,ap-105|\
avm,fritz1750e|\
avm,fritz300e|\
@ -361,6 +362,11 @@ ath79_setup_macs()
alfa-network,ap121f)
label_mac=$(mtd_get_mac_binary art 0x1002)
;;
arduino,yun)
base_mac=$(mtd_get_mac_binary art 0x1002)
lan_mac=$(macaddr_setbit $base_mac 29)
[ $lan_mac = $base_mac ] && lan_mac=$(macaddr_unsetbit $base_mac 29)
;;
avm,fritz1750e|\
avm,fritz450e|\
avm,fritzdvbc)

3
target/linux/ath79/generic/base-files/etc/uci-defaults/04_led_migration
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@ -5,6 +5,9 @@ board=$(board_name)
boardonly="${board##*,}"
case "$board" in
arduino,yun)
migrate_leds "arduino:=yun:"
;;
engenius,epg5000)
migrate_leds ":wlan-2g=:wlan2g" ":wlan-5g=:wlan5g"
;;

11
target/linux/ath79/image/generic.mk
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@ -210,6 +210,17 @@ define Device/alfa-network_ap121f
endef
TARGET_DEVICES += alfa-network_ap121f
define Device/arduino_yun
SOC := ar9331
DEVICE_VENDOR := Arduino
DEVICE_MODEL := Yun
DEVICE_PACKAGES := kmod-usb2 kmod-usb-chipidea2 kmod-usb-ledtrig-usbport \
kmod-usb-storage block-mount -swconfig
IMAGE_SIZE := 15936k
SUPPORTED_DEVICES += arduino-yun
endef
TARGET_DEVICES += arduino_yun
define Device/aruba_ap-105
SOC := ar7161
DEVICE_VENDOR := Aruba

54
target/linux/ath79/patches-4.19/921-serial-core-add-support-for-boot-console-with-arbitr.patch
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@ -0,0 +1,54 @@
From 4d3c17975c7814884a721fe693b3adf5c426d759 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Tue, 10 Nov 2015 22:18:39 +0100
Subject: [RFC] serial: core: add support for boot console with arbitrary
baud rates
The Arduino Yun uses a baud rate of 250000 by default. The serial is
going over the Atmel ATmega and is used to connect to this chip.
Without this patch Linux wants to switch the console to 9600 Baud.
With this patch Linux will use the configured baud rate and not a
default one specified in uart_register_driver().
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
[rebased to 4.14, slightly reworded commit message]
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
---
drivers/tty/serial/serial_core.c | 6 +++++-
include/linux/console.h | 1 +
2 files changed, 6 insertions(+), 1 deletions(-)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -219,6 +219,8 @@ static int uart_port_startup(struct tty_
if (retval == 0) {
if (uart_console(uport) && uport->cons->cflag) {
tty->termios.c_cflag = uport->cons->cflag;
+ tty->termios.c_ospeed = uport->cons->baud;
+ tty->termios.c_ispeed = uport->cons->baud;
uport->cons->cflag = 0;
}
/*
@@ -2058,8 +2060,10 @@ uart_set_options(struct uart_port *port,
* Allow the setting of the UART parameters with a NULL console
* too:
*/
- if (co)
+ if (co) {
co->cflag = termios.c_cflag;
+ co->baud = baud;
+ }
return 0;
}
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -153,6 +153,7 @@ struct console {
short flags;
short index;
int cflag;
+ int baud;
void *data;
struct console *next;
};

54
target/linux/ath79/patches-5.4/921-serial-core-add-support-for-boot-console-with-arbitr.patch
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@ -0,0 +1,54 @@
From 4d3c17975c7814884a721fe693b3adf5c426d759 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Tue, 10 Nov 2015 22:18:39 +0100
Subject: [RFC] serial: core: add support for boot console with arbitrary
baud rates
The Arduino Yun uses a baud rate of 250000 by default. The serial is
going over the Atmel ATmega and is used to connect to this chip.
Without this patch Linux wants to switch the console to 9600 Baud.
With this patch Linux will use the configured baud rate and not a
default one specified in uart_register_driver().
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
[rebased to 4.14, slightly reworded commit message]
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
---
drivers/tty/serial/serial_core.c | 6 +++++-
include/linux/console.h | 1 +
2 files changed, 6 insertions(+), 1 deletions(-)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -220,6 +220,8 @@ static int uart_port_startup(struct tty_
if (retval == 0) {
if (uart_console(uport) && uport->cons->cflag) {
tty->termios.c_cflag = uport->cons->cflag;
+ tty->termios.c_ospeed = uport->cons->baud;
+ tty->termios.c_ispeed = uport->cons->baud;
uport->cons->cflag = 0;
}
/*
@@ -2104,8 +2106,10 @@ uart_set_options(struct uart_port *port,
* Allow the setting of the UART parameters with a NULL console
* too:
*/
- if (co)
+ if (co) {
co->cflag = termios.c_cflag;
+ co->baud = baud;
+ }
return 0;
}
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -153,6 +153,7 @@ struct console {
short flags;
short index;
int cflag;
+ int baud;
void *data;
struct console *next;
};
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