ar71xx: add support for TP-Link TL-WR902AC v1

TP-Link TL-WR902AC v1 is a pocket-size, dual-band (AC750), successor of
TL-MR3020 (both devices use very similar enclosure, in same size). New
device is based on Qualcomm QCA9531 v2 + QCA9887. FCC ID: TE7WR902AC.

Specification:

- 650/391/216 MHz (CPU/DDR/AHB)
- 1x 10/100 Mbps Ethernet
- 1x USB 2.0 (GPIO-controlled power)
- 64 MB of RAM (DDR2)
- 8 MB of FLASH
- 2T2R 2.4 GHz (QCA9531)
- 1T1R 5 GHz (QCA9887)
- 5x LED (GPIO-controlled), 2x button, 1x 3-pos switch
- UART pads on PCB (TP1 -> TX, TP2 -> RX, TP3 -> GND, TP4 -> 3V3, jumper
  resitors are missing on TX/RX lines)
- 1x micro USB (for power only)

Flash instructions:

Use "factory" image under vendor GUI.

Recovery instructions:

This device contains tftp recovery mode inside U-Boot. You can use it to
flash LEDE (use "factory" image) or vendor firmware.

1. Configure PC with static IP 192.168.0.66/24 and tftp server.
2. Rename "lede-ar71xx-generic-tl-wr902ac-v1-squashfs-factory.bin"
   to "wr902acv1_un_tp_recovery.bin" and place it in tftp server dir.
3. Connect PC with LAN port, press the reset button, power up the router
   and keep button pressed until WPS LED lights up.
4. Router will download file from server, write it to flash and reboot.

Root access over serial line in vendor firmware: root/sohoadmin.

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

1 files changed, 140 insertions, 0 deletions

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr902ac-v1.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr902ac-v1.c
new file mode 100644
index 0000000000..5d7582232c
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr902ac-v1.c
@@ -0,0 +1,140 @@
+/*
+ * TP-Link TL-WR902AC v1 board support
+ *
+ * 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
+ * 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-ap9x-pci.h"
+#include "dev-eth.h"
+#include "dev-gpio-buttons.h"
+#include "dev-leds-gpio.h"
+#include "dev-m25p80.h"
+#include "dev-usb.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+
+
+#define TL_WR902AC_V1_GPIO_LED_LAN	12
+#define TL_WR902AC_V1_GPIO_LED_POWER	13
+#define TL_WR902AC_V1_GPIO_LED_USB	4
+#define TL_WR902AC_V1_GPIO_LED_WLAN2G	11
+#define TL_WR902AC_V1_GPIO_LED_WPS	0
+
+#define TL_WR902AC_V1_GPIO_BTN_RESET	3
+#define TL_WR902AC_V1_GPIO_BTN_SW1	17
+#define TL_WR902AC_V1_GPIO_BTN_SW2	14
+#define TL_WR902AC_V1_GPIO_BTN_WPS	2
+
+#define TL_WR902AC_V1_GPIO_USB_POWER	1
+
+#define TL_WR902AC_V1_KEYS_POLL_INTERVAL	20 /* msecs */
+#define TL_WR902AC_V1_KEYS_DEBOUNCE_INTERVAL	\
+	(3 * TL_WR902AC_V1_KEYS_POLL_INTERVAL)
+
+static struct gpio_led tl_wr902ac_v1_leds_gpio[] __initdata = {
+	{
+		.name		= "tl-wr902ac-v1:green:lan",
+		.gpio		= TL_WR902AC_V1_GPIO_LED_LAN,
+		.active_low	= 1,
+	}, {
+		.name		= "tl-wr902ac-v1:green:power",
+		.gpio		= TL_WR902AC_V1_GPIO_LED_POWER,
+		.active_low	= 0,
+	}, {
+		.name		= "tl-wr902ac-v1:green:usb",
+		.gpio		= TL_WR902AC_V1_GPIO_LED_USB,
+		.active_low	= 0,
+	}, {
+		.name		= "tl-wr902ac-v1:green:wlan2g",
+		.gpio		= TL_WR902AC_V1_GPIO_LED_WLAN2G,
+		.active_low	= 1,
+	}, {
+		.name		= "tl-wr902ac-v1:green:wps",
+		.gpio		= TL_WR902AC_V1_GPIO_LED_WPS,
+		.active_low	= 1,
+	}
+};
+
+static struct gpio_keys_button tl_wr902ac_v1_gpio_keys[] __initdata = {
+	{
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = TL_WR902AC_V1_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_WR902AC_V1_GPIO_BTN_RESET,
+		.active_low	= 1,
+	}, {
+		.desc		= "sw1",
+		.type		= EV_KEY,
+		.code		= BTN_0,
+		.debounce_interval = TL_WR902AC_V1_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_WR902AC_V1_GPIO_BTN_SW1,
+		.active_low	= 1,
+	}, {
+		.desc		= "sw2",
+		.type		= EV_KEY,
+		.code		= BTN_1,
+		.debounce_interval = TL_WR902AC_V1_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_WR902AC_V1_GPIO_BTN_SW2,
+		.active_low	= 1,
+	}, {
+		.desc		= "wps",
+		.type		= EV_KEY,
+		.code		= KEY_WPS_BUTTON,
+		.debounce_interval = TL_WR902AC_V1_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_WR902AC_V1_GPIO_BTN_WPS,
+		.active_low	= 1,
+	}
+};
+
+static void __init tl_wr902ac_v1_setup(void)
+{
+	u8 *art = (u8 *) KSEG1ADDR(0x1f7f0000);
+	u8 *mac = (u8 *) KSEG1ADDR(0x1f750008);
+
+	ath79_register_m25p80(NULL);
+
+	ath79_setup_ar933x_phy4_switch(false, false);
+	ath79_register_mdio(0, 0x0);
+
+	/* LAN */
+	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, 1);
+	ath79_register_eth(0);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(tl_wr902ac_v1_leds_gpio),
+				 tl_wr902ac_v1_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1, TL_WR902AC_V1_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(tl_wr902ac_v1_gpio_keys),
+					tl_wr902ac_v1_gpio_keys);
+
+	gpio_request_one(TL_WR902AC_V1_GPIO_USB_POWER,
+			 GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+			 "USB power");
+
+	ath79_register_usb();
+
+	ath79_register_wmac(art + 0x1000, mac);
+
+	ap91_pci_init(art + 0x5000, NULL);
+}
+
+MIPS_MACHINE(ATH79_MACH_TL_WR902AC_V1, "TL-WR902AC-V1", "TP-LINK TL-WR902AC v1",
+	     tl_wr902ac_v1_setup);