ar71xx: add support for ALFA Network N5Q

ALFA Network N5Q is a successor of previous model, the N5 (outdoor
CPE/AP, based on Atheros AR7240 + AR9280). New version is based on
Atheros AR9344.

Specification:

- 550/400/200 MHz (CPU/DDR/AHB)
- 64 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 2x 10/100 Mbps Ethernet, with passive PoE support (24 V)
- 2T2R 5 GHz (AR9344), with ext. PA (RFPA5542) and LNA, up to 27 dBm
- 8x LED (7 are driven by GPIO)
- 1x button (reset)
- external h/w watchdog (EM6324QYSP5B, disabled and not used)
- header for optional 802.3at/af PoE module
- DC jack for main power input (optional, not installed by default)
- UART header on PCB

Flash instruction:

You can use sysupgrade image directly in vendor firmare which is based
on OpenWrt/LEDE. Alternatively, you can use web recovery mode in U-Boot:

1. Configure PC with static IP 192.168.1.2/24.
2. Connect PC with one of RJ45 ports, press the reset button, power up
   device, wait for first blink of all LEDs (indicates network setup),
   then keep button for 3 following blinks and release it.
3. Open 192.168.1.1 address in your browser and upload sysupgrade image.

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

4 files changed, 142 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 f2717e86e9..43096463c2 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -2008,6 +2008,14 @@ config ATH79_MACH_ZCN_1523H
 	select ATH79_DEV_LEDS_GPIO
 	select ATH79_DEV_M25P80
 
+config ATH79_MACH_N5Q
+	bool "ALFA Network N5Q support"
+	select SOC_AR934X
+	select ATH79_DEV_ETH
+	select ATH79_DEV_GPIO_BUTTONS
+	select ATH79_DEV_LEDS_GPIO
+	select ATH79_DEV_WMAC
+
 config ATH79_MACH_NBG460N
 	bool "Zyxel NBG460N/550N/550NH board support"
 	select SOC_AR913X
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index 0e581005d7..53edaac712 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -147,6 +147,7 @@ obj-$(CONFIG_ATH79_MACH_MYNET_N750)		+= mach-mynet-n750.o
 obj-$(CONFIG_ATH79_MACH_MYNET_REXT)		+= mach-mynet-rext.o
 obj-$(CONFIG_ATH79_MACH_MZK_W04NU)		+= mach-mzk-w04nu.o
 obj-$(CONFIG_ATH79_MACH_MZK_W300NH)		+= mach-mzk-w300nh.o
+obj-$(CONFIG_ATH79_MACH_N5Q)			+= mach-n5q.o
 obj-$(CONFIG_ATH79_MACH_NBG460N)		+= mach-nbg460n.o
 obj-$(CONFIG_ATH79_MACH_NBG6716)		+= mach-nbg6716.o
 obj-$(CONFIG_ATH79_MACH_RAMBUTAN)		+= mach-rambutan.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-n5q.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-n5q.c
new file mode 100644
index 0000000000..895fc32933
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-n5q.c
@@ -0,0 +1,132 @@
+/*
+ * ALFA Network N5Q 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-wmac.h"
+#include "machtypes.h"
+
+#define N5Q_GPIO_LED_LAN	19
+#define N5Q_GPIO_LED_SIGNAL1	0
+#define N5Q_GPIO_LED_SIGNAL2	1
+#define N5Q_GPIO_LED_SIGNAL3	2
+#define N5Q_GPIO_LED_SIGNAL4	3
+#define N5Q_GPIO_LED_WAN	18
+#define N5Q_GPIO_LED_WLAN	12
+
+#define N5Q_GPIO_WDT_EN		16
+#define N5Q_GPIO_WDT_IN		17
+
+#define N5Q_GPIO_BTN_RESET	11
+
+#define N5Q_MAC0_OFFSET		0
+#define N5Q_MAC1_OFFSET		6
+#define N5Q_WMAC_CALDATA_OFFSET	0x1000
+
+#define N5Q_KEYS_POLL_INTERVAL		20
+#define N5Q_KEYS_DEBOUNCE_INTERVAL	(3 * N5Q_KEYS_POLL_INTERVAL)
+
+static struct gpio_led n5q_leds_gpio[] __initdata = {
+	{
+		.name		= "n5q:green:lan",
+		.gpio		= N5Q_GPIO_LED_LAN,
+		.active_low	= 1,
+	}, {
+		.name		= "n5q:red:signal1",
+		.gpio		= N5Q_GPIO_LED_SIGNAL1,
+		.active_low	= 1,
+	}, {
+		.name		= "n5q:orange:signal2",
+		.gpio		= N5Q_GPIO_LED_SIGNAL2,
+		.active_low	= 1,
+	}, {
+		.name		= "n5q:green:signal3",
+		.gpio		= N5Q_GPIO_LED_SIGNAL3,
+		.active_low	= 1,
+	}, {
+		.name		= "n5q:green:signal4",
+		.gpio		= N5Q_GPIO_LED_SIGNAL4,
+		.active_low	= 1,
+	}, {
+		.name		= "n5q:green:wan",
+		.gpio		= N5Q_GPIO_LED_WAN,
+		.active_low	= 1,
+	}, {
+		.name		= "n5q:green:wlan",
+		.gpio		= N5Q_GPIO_LED_WLAN,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button n5q_gpio_keys[] __initdata = {
+	{
+		.desc			= "reset",
+		.type			= EV_KEY,
+		.code			= KEY_RESTART,
+		.debounce_interval	= N5Q_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= N5Q_GPIO_BTN_RESET,
+		.active_low		= 1,
+	},
+};
+
+static void __init n5q_setup(void)
+{
+	u8 *art = (u8 *) KSEG1ADDR(0x1f070000);
+
+	ath79_register_m25p80(NULL);
+
+	ath79_register_mdio(1, 0x0);
+
+	ath79_switch_data.phy4_mii_en = 1;
+	ath79_switch_data.phy_poll_mask = 0xf7;
+
+	/* 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, art + N5Q_MAC1_OFFSET, 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, art + N5Q_MAC0_OFFSET, 0);
+	ath79_register_eth(0);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(n5q_leds_gpio),
+				 n5q_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1, N5Q_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(n5q_gpio_keys),
+					n5q_gpio_keys);
+
+	gpio_request_one(N5Q_GPIO_WDT_IN,
+			 GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED,
+			 "WDT input");
+
+	gpio_request_one(N5Q_GPIO_WDT_EN,
+			 GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED,
+			 "WDT enable");
+
+	ath79_register_wmac(art + N5Q_WMAC_CALDATA_OFFSET, NULL);
+}
+
+MIPS_MACHINE(ATH79_MACH_N5Q, "N5Q", "ALFA Network N5Q", n5q_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index c2cb8b6126..06fa4768c1 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -143,6 +143,7 @@ enum ath79_mach_type {
 	ATH79_MACH_MYNET_REXT,			/* WD My Net Wi-Fi Range Extender */
 	ATH79_MACH_MZK_W04NU,			/* Planex MZK-W04NU */
 	ATH79_MACH_MZK_W300NH,			/* Planex MZK-W300NH */
+	ATH79_MACH_N5Q,				/* ALFA Network N5Q */
 	ATH79_MACH_NBG460N,			/* Zyxel NBG460N/550N/550NH */
 	ATH79_MACH_NBG6616,			/* Zyxel NBG6616 */
 	ATH79_MACH_NBG6716,			/* Zyxel NBG6716 */