ar71xx: add support for Teltonika RUT900

Teltonika RUT900 is an industrial 3G router based on Atheros AR9344.

There are available 3 other models in RUT9xx series: RUT905, RUT950 and
RUT955, which differ in availability of additional I/O ports, built-in
GSM modem type, GPS antenna and other features. FCC ID of the RUT950
model (LTE module built-in): 2AET4-RUT950.

This patch adds support for the RUT900 model only but can be easily
extended to cover whole series. Also, as there are several different
3/4G modules (Huawei, Quectel, Telit) used in whole series, packages
required for WWAN support are not included by default. It is up to the
user to install required software for built-in modem.

Specification:

- 550/400/200 MHz (CPU/DDR/AHB)
- 128 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 4x 10/100 Mbps Ethernet, with passive PoE support on LAN1
- 2T2R 2,4 GHz (AR9344), with ext. PA (MGA-22103) and LNA
- built-in 3G module (example: Telit HE910-D)
- 2x miniSIM slot
- 2x RP-SMA/F (Wi-Fi), 2x SMA/F (3G)
- PCA9539 16-bit GPIO I2C expander
- 12x LED (4 are driven by AR9344, 7 by PCA9539)
- 1x button (reset)
- DC jack for main power input (9-30 V)
- UART available on PCB edge connector

Serial console pinout:

- RX: pin1 (square) on top side of the main PCB (AR9344 is on top)
- TX: pin1 (square) on bottom side

Flash instruction:

Vendor firmware is based on OpenWrt CC release. Use the "factory" image
directly in GUI (make sure to uncheck "keep settings") or in U-Boot web
based recovery. To avoid any problems, make sure to first update vendor
firmware to latest version - "factory" image was successfully tested on
device running "RUT9XX_R_00.03.960" firmware and U-Boot "3.0.1".

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

4 files changed, 204 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 43096463c2..2b7e086e2c 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -1281,6 +1281,17 @@ config ATH79_MACH_RE450
 	select ATH79_DEV_M25P80
 	select ATH79_DEV_WMAC
 
+config ATH79_MACH_RUT9XX
+	bool "Teltonika RUT900 series support"
+	select SOC_AR934X
+	select ATH79_DEV_ETH
+	select ATH79_DEV_GPIO_BUTTONS
+	select ATH79_DEV_LEDS_GPIO
+	select ATH79_DEV_M25P80
+	select ATH79_DEV_USB
+	select ATH79_DEV_WMAC
+	select GPIO_PCA953X
+
 config ATH79_MACH_RW2458N
 	bool "Redwave RW2458N board support"
 	select SOC_AR724X
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index 53edaac712..4f3bb97e33 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -174,6 +174,7 @@ obj-$(CONFIG_ATH79_MACH_RB95X)			+= mach-rb95x.o
 obj-$(CONFIG_ATH79_MACH_RBSPI)			+= mach-rbspi.o
 obj-$(CONFIG_ATH79_MACH_RBSXTLITE)		+= mach-rbsxtlite.o
 obj-$(CONFIG_ATH79_MACH_RE450)			+= mach-re450.o
+obj-$(CONFIG_ATH79_MACH_RUT9XX)			+= mach-rut9xx.o
 obj-$(CONFIG_ATH79_MACH_RW2458N)		+= mach-rw2458n.o
 obj-$(CONFIG_ATH79_MACH_SC1750)			+= mach-sc1750.o
 obj-$(CONFIG_ATH79_MACH_SC300M)			+= mach-sc300m.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-rut9xx.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-rut9xx.c
new file mode 100644
index 0000000000..43a2a78c67
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-rut9xx.c
@@ -0,0 +1,191 @@
+/*
+ * Teltonika RUT900 series boards 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/i2c.h>
+#include <linux/i2c-algo-bit.h>
+#include <linux/i2c-gpio.h>
+#include <linux/platform_data/pca953x.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 RUT9XX_GPIO_LED_LAN1		14
+#define RUT9XX_GPIO_LED_LAN2		13
+#define RUT9XX_GPIO_LED_LAN3		22
+#define RUT9XX_GPIO_LED_WAN		1
+
+#define RUT9XX_PCA9539_GPIO_BASE	32
+#define RUT9XX_PCA9539_GPIO_SIGNAL1	(0 + RUT9XX_PCA9539_GPIO_BASE)
+#define RUT9XX_PCA9539_GPIO_SIGNAL2	(1 + RUT9XX_PCA9539_GPIO_BASE)
+#define RUT9XX_PCA9539_GPIO_SIGNAL3	(2 + RUT9XX_PCA9539_GPIO_BASE)
+#define RUT9XX_PCA9539_GPIO_SIGNAL4	(3 + RUT9XX_PCA9539_GPIO_BASE)
+#define RUT9XX_PCA9539_GPIO_SIGNAL5	(4 + RUT9XX_PCA9539_GPIO_BASE)
+#define RUT9XX_PCA9539_GPIO_STATUS_R	(5 + RUT9XX_PCA9539_GPIO_BASE)
+#define RUT9XX_PCA9539_GPIO_STATUS_G	(6 + RUT9XX_PCA9539_GPIO_BASE)
+
+#define RUT9XX_GPIO_BTN_RESET		15
+
+#define RUT9XX_GPIO_I2C_SCK		16
+#define RUT9XX_GPIO_I2C_SDA		17
+
+#define RUT9XX_GPIO_EXT_LNA0		2
+
+#define RUT9XX_WMAC_CALDATA_OFFSET	0x1000
+
+#define RUT9XX_KEYS_POLL_INTERVAL	20
+#define RUT9XX_KEYS_DEBOUNCE_INTERVAL	(3 * RUT9XX_KEYS_POLL_INTERVAL)
+
+static struct gpio_led rut900_leds_gpio[] __initdata = {
+	{
+		.name		= "rut900:green:lan1",
+		.gpio		= RUT9XX_GPIO_LED_LAN1,
+		.active_low	= 1,
+	}, {
+		.name		= "rut900:green:lan2",
+		.gpio		= RUT9XX_GPIO_LED_LAN2,
+		.active_low	= 1,
+	}, {
+		.name		= "rut900:green:lan3",
+		.gpio		= RUT9XX_GPIO_LED_LAN3,
+		.active_low	= 1,
+	}, {
+		.name		= "rut900:green:signal1",
+		.gpio		= RUT9XX_PCA9539_GPIO_SIGNAL1,
+		.active_low	= 0,
+	}, {
+		.name		= "rut900:green:signal2",
+		.gpio		= RUT9XX_PCA9539_GPIO_SIGNAL2,
+		.active_low	= 0,
+	}, {
+		.name		= "rut900:green:signal3",
+		.gpio		= RUT9XX_PCA9539_GPIO_SIGNAL3,
+		.active_low	= 0,
+	}, {
+		.name		= "rut900:green:signal4",
+		.gpio		= RUT9XX_PCA9539_GPIO_SIGNAL4,
+		.active_low	= 0,
+	}, {
+		.name		= "rut900:green:signal5",
+		.gpio		= RUT9XX_PCA9539_GPIO_SIGNAL5,
+		.active_low	= 0,
+	}, {
+		.name		= "rut900:green:status",
+		.gpio		= RUT9XX_PCA9539_GPIO_STATUS_G,
+		.active_low	= 0,
+	}, {
+		.name		= "rut900:green:wan",
+		.gpio		= RUT9XX_GPIO_LED_WAN,
+		.active_low	= 1,
+	}, {
+		.name		= "rut900:red:status",
+		.gpio		= RUT9XX_PCA9539_GPIO_STATUS_R,
+		.active_low	= 0,
+	},
+};
+
+static struct gpio_keys_button rut900_gpio_keys[] __initdata = {
+	{
+		.desc			= "reset",
+		.type			= EV_KEY,
+		.code			= KEY_RESTART,
+		.debounce_interval	= RUT9XX_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= RUT9XX_GPIO_BTN_RESET,
+		.active_low		= 1,
+	},
+};
+
+static struct i2c_gpio_platform_data rut900_i2c_gpio_data = {
+	.sda_pin	= RUT9XX_GPIO_I2C_SDA,
+	.scl_pin	= RUT9XX_GPIO_I2C_SCK,
+	.udelay		= 10,
+};
+
+static struct platform_device rut900_i2c_device = {
+	.name	= "i2c-gpio",
+	.id	= 0,
+	.dev	= {
+		.platform_data = &rut900_i2c_gpio_data,
+	},
+};
+
+static struct pca953x_platform_data rut9xx_pca9539_data = {
+	.gpio_base	= RUT9XX_PCA9539_GPIO_BASE,
+	.irq_base	= -1,
+};
+
+static struct i2c_board_info rut900_i2c_devs[] __initdata = {
+	{
+		I2C_BOARD_INFO("pca9539", 0x74),
+		.platform_data = &rut9xx_pca9539_data,
+	},
+};
+
+static void __init rut900_setup(void)
+{
+	u8 *art = (u8 *) KSEG1ADDR(0x1f030000);
+	u8 *mac = (u8 *) KSEG1ADDR(0x1f020000);
+	u8  wlan_mac[ETH_ALEN];
+
+	ath79_register_m25p80(NULL);
+
+	ath79_register_mdio(1, 0x0);
+
+	ath79_switch_data.phy4_mii_en = 1;
+	ath79_switch_data.phy_poll_mask = 0xf1;
+
+	/* 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, 0);
+	ath79_register_eth(1);
+
+	/* WAN */
+	ath79_eth0_data.duplex = DUPLEX_FULL;
+	ath79_eth0_data.mii_bus_dev = &ath79_mdio1_device.dev;
+	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, 1);
+	ath79_register_eth(0);
+
+	platform_device_register(&rut900_i2c_device);
+	i2c_register_board_info(0, rut900_i2c_devs,
+				ARRAY_SIZE(rut900_i2c_devs));
+
+	/* Disable JTAG (enables GPIO0-3) */
+	ath79_gpio_function_enable(AR934X_GPIO_FUNC_JTAG_DISABLE);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(rut900_leds_gpio),
+				 rut900_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1, RUT9XX_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(rut900_gpio_keys),
+					rut900_gpio_keys);
+
+	ath79_wmac_set_ext_lna_gpio(0, RUT9XX_GPIO_EXT_LNA0);
+
+	ath79_init_mac(wlan_mac, mac, 2);
+	ath79_register_wmac(art + RUT9XX_WMAC_CALDATA_OFFSET, wlan_mac);
+
+	ath79_register_usb();
+}
+
+MIPS_MACHINE(ATH79_MACH_RUT9XX, "RUT900", "Teltonika RUT900", rut900_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 06fa4768c1..40ac034388 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -202,6 +202,7 @@ enum ath79_mach_type {
 	ATH79_MACH_RB_SXTLITE2ND,		/* Mikrotik RouterBOARD SXT Lite 2nD */
 	ATH79_MACH_RB_SXTLITE5ND,		/* Mikrotik RouterBOARD SXT Lite 5nD */
 	ATH79_MACH_RE450,			/* TP-LINK RE450 */
+	ATH79_MACH_RUT9XX,			/* Teltonika RUT900 series */
 	ATH79_MACH_RW2458N,			/* Redwave RW2458N */
 	ATH79_MACH_SC1750,			/* Abicom SC1750 */
 	ATH79_MACH_SC300M,			/* Abicom SC300M */