ar71xx: add support for EnGenius ENS202EXT

EnGenius ENS202EXT is an outdoor wireless access point with
2-port 10/100 switch, detachable antennas and proprietery PoE.

The device is based on Qualcomm/Atheros AR9341 v1.

Specifications:
- 535/400/200 MHz (CPU/DDR/AHB)
- 64 MB of RAM
- 16 MB of FLASH
- UART (J1) header on PCB (unpopulated)
- 2x 10/100 Mbps Ethernet
- 2.4 GHz, up to 26dBm
- 2x external, detachable antennas
- 7x LED, 1x button

Flash instructions:

You have three options:

- Use the vendor firmware upgrade page on the web interface and give
it the factory.img. This is the easiest way to go about it.

- If you have serial access during u-boot, interrupt the normal boot
(any key before timeout) and run 'run failsafe_boot'; this will bring
you to a minimal openwrt luci image on ip 192.168.1.1 useful if you've
bricked the normal firmware.

- Use the vendor's management cli, which can be accessed via telnet
with the same credentials as the web login (default admin:admin), then
issue the following commands:

*** Hi admin, welcome to use cli(V-1.6.7) ***
---========= Commands Help =========---
      stat -- Status
       sys -- System
    wless2 -- 2.4G-Wireless
      mgmt -- Management
      tree -- Tree
      help -- Help
    reboot -- Reboot
ens202ext>mgmt
  Management
---========= Commands Help =========---
     admin -- Administration
     mvlan -- Management VLAN settings
      snmp -- SNMP settings
    backup -- Backup/Restore settings
    autorb -- Auto reboot settings
   fwgrade -- Firmware upgrade
      time -- Time settings
   wifisch -- Wifi schedule
       log -- Log
      diag -- Diagnostics
      disc -- Device Discovery
    logout -- Logout
      help -- Help
      exit -- Exit
ens202ext/mgmt>fwgrade
  Management --> Firmware upgrade
---========= Commands Help =========---
      fwup -- Firmware upgrade
      help -- Help
      exit -- Exit
ens202ext/mgmt/fwgrade>fwup http://web.server/lede-ar71xx-generic-ens202ext-squashfs-factory.bin

Signed-off-by: Marty Plummer <ntzrmtthihu777@gmail.com>

4 files changed, 135 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 70c27a65be..c18eec557d 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -767,6 +767,15 @@ config ATH79_MACH_EAP120
 	select ATH79_DEV_M25P80
 	select ATH79_DEV_WMAC
 
+config ATH79_MACH_ENS202EXT
+	bool "EnGenius ENS202EXT 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_WMAC
+
 config ATH79_MACH_EAP300V2
 	bool "EnGenius EAP300 v2 support"
 	select SOC_AR934X
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index bc3f6819be..55c5a2a939 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -104,6 +104,7 @@ obj-$(CONFIG_ATH79_MACH_EAP300V2)		+= mach-eap300v2.o
 obj-$(CONFIG_ATH79_MACH_EAP7660D)		+= mach-eap7660d.o
 obj-$(CONFIG_ATH79_MACH_EL_M150)		+= mach-el-m150.o
 obj-$(CONFIG_ATH79_MACH_EL_MINI)		+= mach-el-mini.o
+obj-$(CONFIG_ATH79_MACH_ENS202EXT)		+= mach-ens202ext.o
 obj-$(CONFIG_ATH79_MACH_EPG5000)		+= mach-epg5000.o
 obj-$(CONFIG_ATH79_MACH_ESR1750)		+= mach-esr1750.o
 obj-$(CONFIG_ATH79_MACH_ESR900)			+= mach-esr900.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-ens202ext.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-ens202ext.c
new file mode 100644
index 0000000000..07dbc2e69d
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-ens202ext.c
@@ -0,0 +1,124 @@
+/*
+ * EnGenius ENS202EXT board support
+ *
+ * Copyright (C) 2017 Marty Plummer <netz.kernel@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/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-ath79/ar71xx_regs.h>
+#include <asm/mach-ath79/ath79.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"
+#include "nvram.h"
+
+#define ENS202_GPIO_LED_WLAN4		0
+#define ENS202_GPIO_LED_POWER		14
+#define ENS202_GPIO_LED_WLAN2		16
+#define ENS202_GPIO_LED_WLAN3		17
+#define ENS202_GPIO_LED_WLAN1		18
+
+#define ENS202_GPIO_BTN_RESET		1
+
+#define ENS202_KEYS_POLL_INTERVAL	20	/* msecs */
+#define ENS202_KEYS_DEBOUNCE_INTERVAL	(3 * ENS202_KEYS_POLL_INTERVAL)
+
+static struct gpio_led ens202_leds_gpio[] __initdata = {
+	{
+		.name		= "engenius:amber:wlan1",
+		.gpio		= ENS202_GPIO_LED_WLAN1,
+		.active_low	= 1,
+	}, {
+		.name		= "engenius:red:wlan2",
+		.gpio		= ENS202_GPIO_LED_WLAN2,
+		.active_low	= 1,
+	}, {
+		.name		= "engenius:amber:wlan3",
+		.gpio		= ENS202_GPIO_LED_WLAN3,
+		.active_low	= 1,
+	}, {
+		.name		= "engenius:green:wlan4",
+		.gpio		= ENS202_GPIO_LED_WLAN4,
+		.active_low	= 1,
+	}, {
+		.name		= "engenius:amber:power",
+		.gpio		= ENS202_GPIO_LED_POWER,
+		.active_low	= 1,
+	}
+};
+
+static struct gpio_keys_button ens202_gpio_keys[] __initdata = {
+	{
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = ENS202_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= ENS202_GPIO_BTN_RESET,
+		.active_low	= 1,
+	}
+};
+
+static void __init ens202_setup(void)
+{
+	const char *nvram = (char *) KSEG1ADDR(0x1f040000);
+	u8 mac_buff[6];
+	u8 *mac = NULL;
+	u8 *art = (u8 *) KSEG1ADDR(0x1fff0000);
+
+	if (ath79_nvram_parse_mac_addr(nvram, 0x10000,
+				       "ethaddr=", mac_buff) == 0) {
+		ath79_init_mac(ath79_eth0_data.mac_addr, mac_buff, 0);
+		ath79_init_mac(ath79_eth1_data.mac_addr, mac_buff, 1);
+		mac = mac_buff;
+	}
+
+	ath79_gpio_function_enable(AR934X_GPIO_FUNC_JTAG_DISABLE);
+
+	ath79_gpio_output_select(ENS202_GPIO_LED_POWER, AR934X_GPIO_OUT_GPIO);
+	ath79_gpio_output_select(ENS202_GPIO_LED_WLAN1, AR934X_GPIO_OUT_GPIO);
+	ath79_gpio_output_select(ENS202_GPIO_LED_WLAN2, AR934X_GPIO_OUT_GPIO);
+	ath79_gpio_output_select(ENS202_GPIO_LED_WLAN3, AR934X_GPIO_OUT_GPIO);
+	ath79_gpio_output_select(ENS202_GPIO_LED_WLAN4, AR934X_GPIO_OUT_GPIO);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(ens202_leds_gpio),
+				 ens202_leds_gpio);
+	ath79_register_gpio_keys_polled(-1, ENS202_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(ens202_gpio_keys),
+					ens202_gpio_keys);
+
+	ath79_register_m25p80(NULL);
+
+	ath79_register_wmac(art + 0x1000, NULL);
+
+	ath79_register_mdio(1, 0);
+
+	ath79_setup_ar934x_eth_cfg(AR934X_ETH_CFG_RGMII_GMAC0 |
+				   AR934X_ETH_CFG_SW_ONLY_MODE);
+	ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_MII;
+	ath79_eth0_data.phy_mask = BIT(0);
+	ath79_eth0_data.mii_bus_dev = &ath79_mdio1_device.dev;
+	ath79_eth0_pll_data.pll_1000 = 0x06000000;
+
+	ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_GMII;
+	ath79_eth1_data.speed = SPEED_1000;
+	ath79_eth1_data.duplex = DUPLEX_FULL;
+
+	ath79_register_eth(0);
+	ath79_register_eth(1);
+}
+
+MIPS_MACHINE(ATH79_MACH_ENS202EXT, "ENS202EXT", "EnGenius ENS202EXT",
+	     ens202_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index ddb91ad46d..0d05086a1c 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -95,6 +95,7 @@ enum ath79_mach_type {
 	ATH79_MACH_EBR_2310_C1,			/* D-link EBR-2310 rev. C1 */
 	ATH79_MACH_EL_M150,			/* EasyLink EL-M150 */
 	ATH79_MACH_EL_MINI,			/* EasyLink EL-MINI */
+	ATH79_MACH_ENS202EXT,			/* EnGenius ENS202EXT */
 	ATH79_MACH_EPG5000,			/* EnGenius EPG5000 */
 	ATH79_MACH_ESR1750,			/* EnGenius ESR1750 */
 	ATH79_MACH_ESR900,			/* EnGenius ESR900 */