ar71xx: add support for TL-WR802N Version 2

This patch adds support for the TP-Link TL-WR802N Version 2.

Specification:
- SoC: Qualcomm Atheros QCA9533 (560 MHz, MIPS 24Kc)
- RAM: 32 MiB
- Storage: 4 MiB of FLash on board
- Wireless: Built into QCA9533 (Honey Bee), PHY modes b/g/n
- Ethernet: 1x100M (port0)

Installation through OEM Web Interface:
- Connect to TL-WR802N by Ethernet or Wi-Fi
- Go to http://192.168.0.1 (default user is "admin" & password is "admin)
- Go to "System Tools -> Firmware Upgrade"
- Browse for firmware "*.factory-us.bin" or  "*.factory-eu.bin" for eu model
- Click upgrade

Installation through tftp:
Note: T_OUT, T_IN and GND on the board must be connected to USB TTL
      Serial Configuration 115200 8n1

- Boot the TL-WR802N
- When "Autobooting in 1 seconds" appears type "tpl" followed by enter
- Connect to the board Ethernet port
    (IPADDR: 192.168.1.1, ServerIP: 192.168.1.10)
- tftpboot 0x80000000 <Firmware Image Name>
- Record the result of "printenv bootcmd"
- Enter "erase <Result of 'printenv bootcmd'> +0x3c0000"
    (e.g erase 0x9f020000 +0x3c0000)
- Enter "cp.b 0x80000000 <Result of 'printenv bootcmd'> 0x3c0000"
    (e.g cp.b 0x80000000 0x9f020000 0x3c0000)
- Enter "bootm <Result of 'printenv bootcmd'>"
    (e.g bootm 0x9f020000)

Signed-off-by: Thomas Roberts <tom.p.roberts@gmail.com>

4 files changed, 107 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 44f754c2bc..514d05d6de 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -1533,6 +1533,14 @@ config ATH79_MACH_TL_WR802N_V1
 	select ATH79_DEV_LEDS_GPIO
 	select ATH79_DEV_M25P80
 
+config ATH79_MACH_TL_WR802N_V2
+	bool "TP-LINK TL-WR802N v2 support"
+	select SOC_QCA953X
+	select ATH79_DEV_ETH
+	select ATH79_DEV_GPIO_BUTTONS
+	select ATH79_DEV_LEDS_GPIO
+	select ATH79_DEV_M25P80
+
 config ATH79_MACH_TL_WR810N
 	bool "TP-LINK TL-WR810N support"
 	select SOC_QCA953X
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index f402463dfc..64752591d5 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -198,6 +198,7 @@ obj-$(CONFIG_ATH79_MACH_TL_WR720N_V3)		+= mach-tl-wr720n-v3.o
 obj-$(CONFIG_ATH79_MACH_TL_WR741ND)		+= mach-tl-wr741nd.o
 obj-$(CONFIG_ATH79_MACH_TL_WR741ND_V4)		+= mach-tl-wr741nd-v4.o
 obj-$(CONFIG_ATH79_MACH_TL_WR802N_V1)		+= mach-tl-wr802n.o
+obj-$(CONFIG_ATH79_MACH_TL_WR802N_V2)		+= mach-tl-wr802n-v2.o
 obj-$(CONFIG_ATH79_MACH_TL_WR810N)		+= mach-tl-wr810n.o
 obj-$(CONFIG_ATH79_MACH_TL_WR841N_V1)		+= mach-tl-wr841n.o
 obj-$(CONFIG_ATH79_MACH_TL_WR841N_V8)		+= mach-tl-wr841n-v8.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr802n-v2.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr802n-v2.c
new file mode 100644
index 0000000000..10e0c595a6
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr802n-v2.c
@@ -0,0 +1,97 @@
+/*
+ *  TP-LINK TL-WR802N v2
+ *
+ *  Copyright (C) 2016 Thomas Roberts <tom.p.roberts@gmail.com <mailto:tom.p.roberts@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 TL_WR802N_V2_GPIO_LED_SYSTEM	13
+#define TL_WR802N_V2_GPIO_BTN_RESET	11
+
+#define TL_WR802N_V2_KEYS_POLL_INTERVAL	20	/* msecs */
+#define TL_WR802N_V2_KEYS_DEBOUNCE_INTERVAL	(3 * TL_WR802N_V2_KEYS_POLL_INTERVAL)
+
+static const char *tl_wr802n_v2_part_probes[] = {
+	"tp-link",
+	NULL,
+};
+
+static struct flash_platform_data tl_wr802n_v2_flash_data = {
+	.part_probes	= tl_wr802n_v2_part_probes,
+};
+
+static struct gpio_led tl_wr802n_v2_leds_gpio[] __initdata = {
+	{
+		.name		= "tl-wr802n-v2:green:system",
+		.gpio		= TL_WR802N_V2_GPIO_LED_SYSTEM,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button tl_wr802n_v2_gpio_keys[] __initdata = {
+	{
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = TL_WR802N_V2_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_WR802N_V2_GPIO_BTN_RESET,
+		.active_low	= 0,
+	}
+};
+
+static void __init tl_ap143_setup(void)
+{
+		u8 *mac = (u8 *) KSEG1ADDR(0x1f01fc00);
+		u8 *ee = (u8 *) KSEG1ADDR(0x1fff1000);
+		u8 tmpmac[ETH_ALEN];
+
+		ath79_register_m25p80(&tl_wr802n_v2_flash_data);
+
+		ath79_setup_ar933x_phy4_switch(false, false);
+
+		ath79_register_mdio(0, 0x0);
+
+		/* LAN */
+		ath79_switch_data.phy4_mii_en = 1;
+		ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_MII;
+		ath79_eth0_data.duplex = DUPLEX_FULL;
+		ath79_eth0_data.speed = SPEED_100;
+		ath79_eth0_data.phy_mask = BIT(4);
+		ath79_init_mac(ath79_eth0_data.mac_addr, mac, 1);
+		ath79_register_eth(0);
+
+		ath79_init_mac(tmpmac, mac, 0);
+		ath79_register_wmac(ee, tmpmac);
+};
+
+static void __init tl_wr802n_v2_setup(void)
+{
+	tl_ap143_setup();
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(tl_wr802n_v2_leds_gpio),
+		tl_wr802n_v2_leds_gpio);
+
+	ath79_register_gpio_keys_polled(1, TL_WR802N_V2_KEYS_POLL_INTERVAL,
+		ARRAY_SIZE(tl_wr802n_v2_gpio_keys),
+		tl_wr802n_v2_gpio_keys);
+}
+
+MIPS_MACHINE(ATH79_MACH_TL_WR802N_V2, "TL-WR802N-v2", "TP-LINK TL-WR802N v2",
+		tl_wr802n_v2_setup);
\ No newline at end of file
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 39a80fc6fb..4cad6287a8 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -237,6 +237,7 @@ enum ath79_mach_type {
 	ATH79_MACH_TL_WR741ND,			/* TP-LINK TL-WR741ND */
 	ATH79_MACH_TL_WR741ND_V4,		/* TP-LINK TL-WR741ND v4 */
 	ATH79_MACH_TL_WR802N_V1,		/* TP-LINK TL-WR802N v1 */
+	ATH79_MACH_TL_WR802N_V2,		/* TP-LINK TL-WR802N v2 */
 	ATH79_MACH_TL_WR810N,			/* TP-LINK TL-WR810N */
 	ATH79_MACH_TL_WR841N_V1,		/* TP-LINK TL-WR841N v1 */
 	ATH79_MACH_TL_WR841N_V11,		/* TP-LINK TL-WR841N/ND v11 */