ar71xx: add support for YunCore T830

YunCore T830 is a simple N300 router with 5-port FE switch, detachable
antennas and USB 2.0 port.

Specification:

- 650/597/216 MHz (CPU/DDR/AHB)
- 128 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 5x 10/100 Mbps Ethernet
- 2T2R 2.4 GHz (QCA9531), with ext. PA (SKY65174-21) and LNA
- two external, detachable antennas (RP-SMA)
- 1x USB 2.0
- 8x LED (7 driven by GPIO)
- 1x button (reset)
- DC jack for main power input (12 V)
- UART and JTAG headers on PCB

Flash instruction:

1. First, gain root access to the device, following below steps:

- Login into web gui (default password/IP: admin/192.168.188.253).
- Go to "Advanced" -> "Management" -> "System" and download backup of
  configuration (bakfile.bin).
- Open the file as tar.gz archive, edit/update "shadow" file and change
  hash of root password to something known.
- Repack the archive, rename it back to "bakfile.bin" and use to
  restore configuration of the device.
- After that, device will reboot and can be accessed over SSH.

2. Then, install OpenWrt:

- Login over SSH and issue command:
  fw_setenv bootcmd "bootm 0x9f050000 || bootm 0x9fe80000"
- Upload "sysupgrade" image and install it (only if previous command
  succeeded) with command: "sysupgrade -n -F openwrt-...".

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

4 files changed, 139 insertions, 0 deletions

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
index da3cf63cef..7c0494bcc8 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -1129,6 +1129,16 @@ config ATH79_MACH_SMART_300
 	select ATH79_DEV_M25P80
 	select ATH79_DEV_WMAC
 
+config ATH79_MACH_T830
+	bool "YunCore T830 support"
+	select SOC_QCA953X
+	select ARH79_DEV_ETH
+	select ARH79_DEV_GPIO_BUTTONS
+	select ATH79_DEV_LEDS_GPIO
+	select ATH79_DEV_M25P80
+	select ATH79_DEV_USB
+	select ATH79_DEV_WMAC
+
 config ATH79_MACH_TELLSTICK_ZNET_LITE
 	bool "TellStick ZNet Lite"
 	select SOC_AR933X
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index cea297af87..181e23a37a 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -190,6 +190,7 @@ obj-$(CONFIG_ATH79_MACH_SC450)			+= mach-sc450.o
 obj-$(CONFIG_ATH79_MACH_SMART_300)		+= mach-smart-300.o
 obj-$(CONFIG_ATH79_MACH_SOM9331)		+= mach-som9331.o
 obj-$(CONFIG_ATH79_MACH_SR3200)			+= mach-sr3200.o
+obj-$(CONFIG_ATH79_MACH_T830)			+= mach-t830.o
 obj-$(CONFIG_ATH79_MACH_TELLSTICK_ZNET_LITE)	+= mach-tellstick-znet-lite.o
 obj-$(CONFIG_ATH79_MACH_TEW_632BRP)		+= mach-tew-632brp.o
 obj-$(CONFIG_ATH79_MACH_TEW_673GRU)		+= mach-tew-673gru.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-t830.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-t830.c
new file mode 100644
index 0000000000..ffdb2ca533
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-t830.c
@@ -0,0 +1,127 @@
+/*
+ * YunCore T830 board support
+ *
+ * Copyright (C) 2018 Piotr Dymacz <pepe2k@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+#include "common.h"
+#include "dev-eth.h"
+#include "dev-gpio-buttons.h"
+#include "dev-leds-gpio.h"
+#include "dev-m25p80.h"
+#include "dev-usb.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+
+#define T830_GPIO_LED_LAN1	16
+#define T830_GPIO_LED_LAN2	15
+#define T830_GPIO_LED_LAN3	14
+#define T830_GPIO_LED_LAN4	11
+#define T830_GPIO_LED_USB	13
+#define T830_GPIO_LED_WAN	4
+#define T830_GPIO_LED_WLAN	12
+
+#define T830_GPIO_BTN_RESET	17
+
+#define T830_KEYS_POLL_INTERVAL		20 /* msec */
+#define T830_KEYS_DEBOUNCE_INTERVAL	(3 * T830_KEYS_POLL_INTERVAL)
+
+#define T830_WMAC_CALDATA_OFFSET	0x1000
+
+static struct gpio_led t830_gpio_leds[] __initdata = {
+	{
+		.name		= "t830:green:lan1",
+		.gpio		= T830_GPIO_LED_LAN1,
+		.active_low	= 1,
+	}, {
+		.name		= "t830:green:lan2",
+		.gpio		= T830_GPIO_LED_LAN2,
+		.active_low	= 1,
+	}, {
+		.name		= "t830:green:lan3",
+		.gpio		= T830_GPIO_LED_LAN3,
+		.active_low	= 1,
+	}, {
+		.name		= "t830:green:lan4",
+		.gpio		= T830_GPIO_LED_LAN4,
+		.active_low	= 1,
+	}, {
+		.name		= "t830:green:usb",
+		.gpio		= T830_GPIO_LED_USB,
+		.active_low	= 1,
+		.default_state	= LEDS_GPIO_DEFSTATE_KEEP,
+	}, {
+		.name		= "t830:green:wan",
+		.gpio		= T830_GPIO_LED_WAN,
+		.active_low	= 1,
+	}, {
+		.name		= "t830:green:wlan",
+		.gpio		= T830_GPIO_LED_WLAN,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button t830_gpio_keys[] __initdata = {
+	{
+		.desc			= "reset",
+		.type			= EV_KEY,
+		.code			= KEY_RESTART,
+		.debounce_interval	= T830_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= T830_GPIO_BTN_RESET,
+		.active_low		= 1,
+	},
+};
+
+static void __init t830_setup(void)
+{
+	u8 *art = (u8 *) KSEG1ADDR(0x1fff1000);
+	u8 *mac = (u8 *) KSEG1ADDR(0x1fff0000);
+
+	ath79_register_m25p80(NULL);
+
+	ath79_setup_ar933x_phy4_switch(false, false);
+
+	ath79_register_mdio(0, 0x0);
+
+	ath79_switch_data.phy4_mii_en = 1;
+	ath79_switch_data.phy_poll_mask |= BIT(4);
+
+	/* LAN */
+	ath79_eth1_data.duplex = DUPLEX_FULL;
+	ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_GMII;
+	ath79_init_mac(ath79_eth1_data.mac_addr, mac + 6, 0);
+	ath79_register_eth(1);
+
+	/* WAN */
+	ath79_eth0_data.duplex = DUPLEX_FULL;
+	ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_MII;
+	ath79_eth0_data.phy_mask = BIT(4);
+	ath79_eth0_data.speed = SPEED_100;
+	ath79_init_mac(ath79_eth0_data.mac_addr, mac, 0);
+	ath79_register_eth(0);
+
+	ath79_gpio_function_setup(AR934X_GPIO_FUNC_JTAG_DISABLE,
+				  AR934X_GPIO_FUNC_CLK_OBS4_EN);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(t830_gpio_leds),
+				 t830_gpio_leds);
+
+	ath79_register_gpio_keys_polled(-1, T830_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(t830_gpio_keys),
+					t830_gpio_keys);
+
+	ath79_register_usb();
+	ath79_register_wmac(art, NULL);
+}
+
+MIPS_MACHINE(ATH79_MACH_T830, "T830", "YunCore T830", t830_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index dd6fe75337..da98a811e1 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -223,6 +223,7 @@ enum ath79_mach_type {
 	ATH79_MACH_SMART_300,			/* NC-LINK SMART-300 */
 	ATH79_MACH_SOM9331,			/* OpenEmbed SOM9331 */
 	ATH79_MACH_SR3200,			/* YunCore SR3200 */
+	ATH79_MACH_T830,			/* YunCore T830 */
 	ATH79_MACH_TELLSTICK_ZNET_LITE,		/* TellStick ZNet Lite */
 	ATH79_MACH_TEW_632BRP,			/* TRENDnet TEW-632BRP */
 	ATH79_MACH_TEW_673GRU,			/* TRENDnet TEW-673GRU */