ar71xx: Add support for TP-Link MR6400

You can flash via tftp recovery (serve factory image as /mr6400_tp_recovery.bin
on 192.168.0.66/24, connect to any ethernet port and power on device while
holding the reset button). Flashing via OEM web interface does not work.

Hardware Specification (v1.0 EU):
 - SoC: QCA9531
 - Flash: Winbond W25Q64FV (8MiB)
 - RAM: EtronTech EM6AB160TSE-5G (64MiB)
 - Wireless: SoC platform only (2.4GHz b/g/n, 2x internal antenna)
 - Ethernet: 2NIC (3x100M + 1x100M)
 - WWAN: TP-LINK LTE MODULE (2x external detachable antenna)
 - Power: DC 12V 1A

Signed-off-by: Filip Moc <lede@moc6.cz>

4 files changed, 163 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 9030954c27..813d01a569 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -1417,6 +1417,16 @@ config ATH79_MACH_TL_MR3X20
 	select ATH79_DEV_M25P80
 	select ATH79_DEV_USB
 
+config ATH79_MACH_TL_MR6400
+	bool "TP-LINK TL-MR6400 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_USB
+	select ATH79_DEV_WMAC
+
 config ATH79_MACH_TL_WAX50RE
 	bool "TP-LINK TL-WA750/850RE 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 2868adcaef..bc3f6819be 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -179,6 +179,7 @@ obj-$(CONFIG_ATH79_MACH_TL_MR11U)		+= mach-tl-mr11u.o
 obj-$(CONFIG_ATH79_MACH_TL_MR13U)		+= mach-tl-mr13u.o
 obj-$(CONFIG_ATH79_MACH_TL_MR3020)		+= mach-tl-mr3020.o
 obj-$(CONFIG_ATH79_MACH_TL_MR3X20)		+= mach-tl-mr3x20.o
+obj-$(CONFIG_ATH79_MACH_TL_MR6400)		+= mach-tl-mr6400.o
 obj-$(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
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-mr6400.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-mr6400.c
new file mode 100644
index 0000000000..be49c89cab
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-mr6400.c
@@ -0,0 +1,151 @@
+/*
+ * TP-LINK TL-MR6400 board support
+ *
+ *  Copyright (C) 2017 Filip Moc <lede@moc6.cz>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * The name of the author may not be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE.
+ */
+
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+#include "common.h"
+#include "dev-gpio-buttons.h"
+#include "dev-eth.h"
+#include "dev-leds-gpio.h"
+#include "dev-m25p80.h"
+#include "dev-usb.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+
+#define TL_MR6400_GPIO_LTE_POWER	4
+#define TL_MR6400_GPIO_BTN_RESET	12	/* SW2 */
+#define TL_MR6400_GPIO_BTN_RFKILL	14	/* SW3 */
+#define TL_MR6400_GPIO_LED_WAN		0	/* D12 */
+#define TL_MR6400_GPIO_LED_4G		1	/* D11 */
+#define TL_MR6400_GPIO_LED_WPS		3	/* D5  */
+#define TL_MR6400_GPIO_LED_WLAN		11	/* D3  */
+#define TL_MR6400_GPIO_LED_POWER	13	/* D2  */
+#define TL_MR6400_GPIO_LED_LAN		16	/* D4  */
+
+#define TL_MR6400_KEYS_POLL_INTERVAL	20 /* msecs */
+#define TL_MR6400_KEYS_DEBOUNCE_INTERVAL (3 * TL_MR6400_KEYS_POLL_INTERVAL)
+
+#define TL_MR6400_WMAC_CALDATA_OFFSET	0x1000
+
+static const char *tl_mr6400_part_probes[] = {
+	"tp-link",
+	NULL,
+};
+
+static struct flash_platform_data tl_mr6400_flash_data = {
+	.part_probes	= tl_mr6400_part_probes,
+	.type		= "w25q64",
+};
+
+static struct gpio_led tl_mr6400_leds_gpio[] __initdata = {
+	{
+		.name		= "tp-link:white:wan",
+		.gpio		= TL_MR6400_GPIO_LED_WAN,
+		.active_low	= 0,
+	},
+	{
+		.name		= "tp-link:white:4g",
+		.gpio		= TL_MR6400_GPIO_LED_4G,
+		.active_low	= 0,
+	},
+	{
+		.name		= "tp-link:white:wps",
+		.gpio		= TL_MR6400_GPIO_LED_WPS,
+		.active_low	= 0,
+	},
+	{
+		.name		= "tp-link:white:wlan",
+		.gpio		= TL_MR6400_GPIO_LED_WLAN,
+		.active_low	= 0,
+	},
+	{
+		.name		= "tp-link:white:power",
+		.gpio		= TL_MR6400_GPIO_LED_POWER,
+		.active_low	= 0,
+	},
+	{
+		.name		= "tp-link:white:lan",
+		.gpio		= TL_MR6400_GPIO_LED_LAN,
+		.active_low	= 0,
+	},
+};
+
+static struct gpio_keys_button tl_mr6400_gpio_keys[] __initdata = {
+	{
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = TL_MR6400_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_MR6400_GPIO_BTN_RESET,
+		.active_low	= 1,
+	},
+	{
+		.desc		= "rfkill",
+		.type		= EV_KEY,
+		.code		= KEY_RFKILL,
+		.debounce_interval = TL_MR6400_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_MR6400_GPIO_BTN_RFKILL,
+		.active_low	= 1,
+	},
+};
+
+static void __init tl_mr6400_setup(void)
+{
+	u8 *mac = (u8 *) KSEG1ADDR(0x1f01fc00);
+	u8 *art = (u8 *) KSEG1ADDR(0x1fff0000);
+
+	ath79_register_m25p80(&tl_mr6400_flash_data);
+
+	ath79_register_mdio(0, 0x0);
+
+	/* LAN1, LAN2, LAN3 */
+	ath79_switch_data.phy4_mii_en = 1;
+	ath79_switch_data.phy_poll_mask |= BIT(0);
+	ath79_eth1_data.duplex = DUPLEX_FULL;
+	ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_GMII;
+	ath79_eth1_data.speed = SPEED_1000;
+	ath79_init_mac(ath79_eth1_data.mac_addr, mac, -1);
+	ath79_register_eth(1);
+
+	/* LAN4 / WAN */
+	ath79_eth0_data.phy_mask = BIT(0);
+	ath79_eth0_data.duplex = DUPLEX_FULL;
+	ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_MII;
+	ath79_eth0_data.speed = SPEED_100;
+	ath79_init_mac(ath79_eth0_data.mac_addr, mac, 1);
+	ath79_register_eth(0);
+
+	ath79_register_wmac(art + TL_MR6400_WMAC_CALDATA_OFFSET, mac);
+
+	ath79_register_leds_gpio(-1,
+				 ARRAY_SIZE(tl_mr6400_leds_gpio),
+				 tl_mr6400_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1,
+					TL_MR6400_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(tl_mr6400_gpio_keys),
+					tl_mr6400_gpio_keys);
+
+	gpio_request_one(TL_MR6400_GPIO_LTE_POWER,
+			 GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED | GPIOF_ACTIVE_LOW,
+			 "LTE power");
+	ath79_register_usb();
+}
+
+MIPS_MACHINE(ATH79_MACH_TL_MR6400, "TL-MR6400", "TP-LINK TL-MR6400",
+	     tl_mr6400_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 18033acd12..841badc14f 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -213,6 +213,7 @@ enum ath79_mach_type {
 	ATH79_MACH_TL_MR3220_V2,		/* TP-LINK TL-MR3220 v2 */
 	ATH79_MACH_TL_MR3420,			/* TP-LINK TL-MR3420 */
 	ATH79_MACH_TL_MR3420_V2,		/* TP-LINK TL-MR3420 v2 */
+	ATH79_MACH_TL_MR6400,			/* TP-LINK TL-MR6400 */
 	ATH79_MACH_TL_WA701ND_V2,		/* TP-LINK TL-WA701ND v2 */
 	ATH79_MACH_TL_WA7210N_V2,		/* TP-LINK TL-WA7210N v2 */
 	ATH79_MACH_TL_WA750RE,			/* TP-LINK TL-WA750RE */