ar71xx: add support for TP-Link TL-WA850RE v2

TP-Link TL-WA850RE v2 is a wall-plug N300 Wi-Fi range extender,
based on Qualcomm/Atheros QCA9533 v2.

Short specification:

- 550/391/195 MHz (CPU/DDR/AHB)
- 1x 10/100 Mbps Ethernet
- 32 MB of RAM (DDR1)
- 4 MB of FLASH
- 2T2R 2.4 GHz
- 2x internal antennas (embedded on PCB)
- 9x LED (all can be turned off with GPIO15), 2x button
- UART (J3) header on PCB

Flash instruction: use "factory" image directly in vendor GUI.

Warning: this device does not include any kind of recovery mechanism
in the bootloader and disassembling process is not trivial.

You can access vendor firmware over serial line using:
- login: root
- password: sohoadmin

Image was tested only in US version of the device, but should work
also with the same device version sold in other countries.

Available FLASH space, with LEDE trunk, is only 240 KB.

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

4 files changed, 112 insertions, 2 deletions

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
index 873befaec8..14490e27f7 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -1395,6 +1395,15 @@ config ATH79_MACH_TL_WA830RE_V2
 	select ATH79_DEV_USB
 	select ATH79_DEV_WMAC
 
+config ATH79_MACH_TL_WA850RE_V2
+	bool "TP-LINK TL-WA850RE v2 support"
+	select SOC_QCA953X
+	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_TL_WA901ND
 	bool "TP-LINK TL-WA901ND/TL-WA7510N 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 5baa77d3aa..aab8d6e8d0 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -176,6 +176,7 @@ obj-$(CONFIG_ATH79_MACH_TL_WA701ND_V2)		+= mach-tl-wa701nd-v2.o
 obj-$(CONFIG_ATH79_MACH_TL_WA7210N_V2)		+= mach-tl-wa7210n-v2.o
 obj-$(CONFIG_ATH79_MACH_TL_WA801ND_V3)		+= mach-tl-wa801nd-v3.o
 obj-$(CONFIG_ATH79_MACH_TL_WA830RE_V2)		+= mach-tl-wa830re-v2.o
+obj-$(CONFIG_ATH79_MACH_TL_WA850RE_V2)		+= mach-tl-wax50re.o
 obj-$(CONFIG_ATH79_MACH_TL_WA901ND)		+= mach-tl-wa901nd.o
 obj-$(CONFIG_ATH79_MACH_TL_WA901ND_V2)		+= mach-tl-wa901nd-v2.o
 obj-$(CONFIG_ATH79_MACH_TL_WA901ND_V4)		+= mach-tl-wa901nd-v4.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wax50re.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wax50re.c
index 965b1cd3b8..d7a1af4e2c 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wax50re.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wax50re.c
@@ -1,9 +1,13 @@
 /*
- *  TP-LINK TL-WA750RE v1/TL-WA801ND v2/TL-WA850RE v1/TL-WA901ND v3
- *  board support
+ *  Support for TP-Link boards:
+ *  - TL-WA750RE v1
+ *  - TL-WA801ND v2
+ *  - TL-WA850RE v1/v2
+ *  - TL-WA901ND v3
  *
  *  Copyright (C) 2013 Martijn Zilverschoon <thefriedzombie@gmail.com>
  *  Copyright (C) 2013 Jiri Pirko <jiri@resnulli.us>
+ *  Copyright (C) 2017 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
@@ -33,6 +37,17 @@
 #define TL_WAX50RE_GPIO_LED_SIGNAL4	3
 #define TL_WAX50RE_GPIO_LED_SIGNAL5	4
 
+#define TL_WA850RE_V2_GPIO_LED_LAN	14
+#define TL_WA850RE_V2_GPIO_LED_RE	12
+#define TL_WA850RE_V2_GPIO_LED_SIGNAL1	0
+#define TL_WA850RE_V2_GPIO_LED_SIGNAL2	1
+#define TL_WA850RE_V2_GPIO_LED_SIGNAL3	2
+#define TL_WA850RE_V2_GPIO_LED_SIGNAL4	3
+#define TL_WA850RE_V2_GPIO_LED_SIGNAL5	4
+#define TL_WA850RE_V2_GPIO_LED_WLAN	13
+
+#define TL_WA850RE_V2_GPIO_ENABLE_LEDS	15
+
 #define TL_WA860RE_GPIO_LED_WLAN_ORANGE	0
 #define TL_WA860RE_GPIO_LED_WLAN_GREEN	2
 #define TL_WA860RE_GPIO_LED_POWER_ORANGE	12
@@ -133,6 +148,42 @@ static struct gpio_led tl_wa850re_leds_gpio[] __initdata = {
 	},
 };
 
+static struct gpio_led tl_wa850re_v2_leds_gpio[] __initdata = {
+	{
+		.name		= "tp-link:blue:lan",
+		.gpio		= TL_WA850RE_V2_GPIO_LED_LAN,
+		.active_low	= 1,
+	}, {
+		.name		= "tp-link:blue:re",
+		.gpio		= TL_WA850RE_V2_GPIO_LED_RE,
+		.active_low	= 1,
+	}, {
+		.name		= "tp-link:blue:signal1",
+		.gpio		= TL_WA850RE_V2_GPIO_LED_SIGNAL1,
+		.active_low	= 1,
+	}, {
+		.name		= "tp-link:blue:signal2",
+		.gpio		= TL_WA850RE_V2_GPIO_LED_SIGNAL2,
+		.active_low	= 1,
+	}, {
+		.name		= "tp-link:blue:signal3",
+		.gpio		= TL_WA850RE_V2_GPIO_LED_SIGNAL3,
+		.active_low	= 1,
+	}, {
+		.name		= "tp-link:blue:signal4",
+		.gpio		= TL_WA850RE_V2_GPIO_LED_SIGNAL4,
+		.active_low	= 1,
+	}, {
+		.name		= "tp-link:blue:signal5",
+		.gpio		= TL_WA850RE_V2_GPIO_LED_SIGNAL5,
+		.active_low	= 1,
+	}, {
+		.name		= "tp-link:blue:wlan",
+		.gpio		= TL_WA850RE_V2_GPIO_LED_WLAN,
+		.active_low	= 1,
+	},
+};
+
 static struct gpio_led tl_wa860re_leds_gpio[] __initdata = {
 	{
 		.name		= "tp-link:green:lan",
@@ -242,6 +293,30 @@ static void __init tl_ap123_setup(void)
 	ath79_register_wmac(ee, mac);
 }
 
+static void __init tl_ap143_setup(void)
+{
+	u8 *mac = (u8 *) KSEG1ADDR(0x1f3c0008);
+	u8 *ee = (u8 *) KSEG1ADDR(0x1fff1000);
+	u8 tmpmac[ETH_ALEN];
+
+	ath79_register_m25p80(NULL);
+
+	ath79_setup_ar933x_phy4_switch(false, false);
+
+	ath79_register_mdio(0, 0x0);
+
+	ath79_switch_data.phy4_mii_en = 1;
+	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, -2);
+	ath79_register_eth(0);
+
+	ath79_init_mac(tmpmac, mac, 0);
+	ath79_register_wmac(ee, mac);
+}
+
 static void  __init tl_wa750re_setup(void)
 {
 	tl_ap123_setup();
@@ -284,6 +359,30 @@ static void  __init tl_wa850re_setup(void)
 MIPS_MACHINE(ATH79_MACH_TL_WA850RE, "TL-WA850RE", "TP-LINK TL-WA850RE",
 	     tl_wa850re_setup);
 
+static void  __init tl_wa850re_v2_setup(void)
+{
+	tl_ap143_setup();
+
+	/* For GPIO 0~4 */
+	ath79_gpio_function_setup(AR934X_GPIO_FUNC_JTAG_DISABLE,
+				  AR934X_GPIO_FUNC_CLK_OBS4_EN);
+
+	/* Allow to enable/disable all LEDs from userspace */
+	gpio_request_one(TL_WA850RE_V2_GPIO_ENABLE_LEDS,
+			 GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+			 "LEDs enable");
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(tl_wa850re_v2_leds_gpio),
+				 tl_wa850re_v2_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1, TL_WAX50RE_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(tl_wax50re_gpio_keys),
+					tl_wax50re_gpio_keys);
+}
+
+MIPS_MACHINE(ATH79_MACH_TL_WA850RE_V2, "TL-WA850RE-V2",
+	     "TP-LINK TL-WA850RE v2", tl_wa850re_v2_setup);
+
 static void  __init tl_wa860re_setup(void)
 {
 	tl_ap123_setup();
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 2a8d3398fd..446631f14b 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -206,6 +206,7 @@ enum ath79_mach_type {
 	ATH79_MACH_TL_WA801ND_V3,		/* TP-LINK TL-WA801ND v3 */
 	ATH79_MACH_TL_WA830RE_V2,		/* TP-LINK TL-WA830RE v2 */
 	ATH79_MACH_TL_WA850RE,			/* TP-LINK TL-WA850RE */
+	ATH79_MACH_TL_WA850RE_V2,		/* TP-LINK TL-WA850RE v2 */
 	ATH79_MACH_TL_WA860RE,			/* TP-LINK TL-WA860RE */
 	ATH79_MACH_TL_WA901ND,			/* TP-LINK TL-WA901ND */
 	ATH79_MACH_TL_WA901ND_V2,		/* TP-LINK TL-WA901ND v2 */