ar71xx: add support for GL.iNet GL-AR750

GL.iNet GL-AR750 is a small size, dual-band (AC750) router, based on
Qualcomm/Atheros QCA9531 v2 + QCA9887. FCC ID: 2AFIW-AR750.

Specification:

- 650/597/216 MHz (CPU/DDR/AHB)
- 128 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 3x 10/100 Mbps Ethernet
- 2T2R 2.4 GHz (QCA9531)
- 1T1R 5 GHz (QCA9887)
- 1x USB 2.0 (power controlled by GPIO)
- 1x microSD (GL857L)
- 3x LED (all driven by GPIO)
- 1x button (reset)
- 1x 2-pos switch
- header for optional PoE module
- 1x micro USB for main power input
- UART + I2C header on PCB

Flash instruction:

Vendor firmware is based on OpenWrt/LEDE. GUI or sysupgrade can be used
to flash OpenWrt/LEDE firmware.

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

4 files changed, 159 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 dae68d0fb7..3ca77550bc 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -770,6 +770,17 @@ config ATH79_MACH_GL_AR300M
 	select ATH79_DEV_USB
 	select ATH79_DEV_WMAC
 
+config ATH79_MACH_GL_AR750
+	bool "GL.iNet GL-AR750 support"
+	select SOC_QCA953X
+	select ATH79_DEV_AP9X_PCI if PCI
+	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_GL_DOMINO
 	bool "DOMINO support"
 	select SOC_AR933X
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index b7caa5a770..e9f4d9852b 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -122,6 +122,7 @@ obj-$(CONFIG_ATH79_MACH_FRITZ300E)		+= mach-fritz300e.o
 obj-$(CONFIG_ATH79_MACH_GL_AR150)		+= mach-gl-ar150.o
 obj-$(CONFIG_ATH79_MACH_GL_AR300)		+= mach-gl-ar300.o
 obj-$(CONFIG_ATH79_MACH_GL_AR300M)		+= mach-gl-ar300m.o
+obj-$(CONFIG_ATH79_MACH_GL_AR750)		+= mach-gl-ar750.o
 obj-$(CONFIG_ATH79_MACH_GL_DOMINO)		+= mach-gl-domino.o
 obj-$(CONFIG_ATH79_MACH_GL_INET)		+= mach-gl-inet.o
 obj-$(CONFIG_ATH79_MACH_GL_MIFI)		+= mach-gl-mifi.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-gl-ar750.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-gl-ar750.c
new file mode 100644
index 0000000000..9ee6e29c02
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-gl-ar750.c
@@ -0,0 +1,146 @@
+/*
+ * GL.iNet GL-AR750 board support
+ *
+ * Copyright (C) 2018 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/i2c.h>
+#include <linux/i2c-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 GL_AR750_GPIO_LED_POWER		12
+#define GL_AR750_GPIO_LED_WLAN2G	14
+#define GL_AR750_GPIO_LED_WLAN5G	13
+
+#define GL_AR750_GPIO_BTN_RESET		3
+#define GL_AR750_GPIO_BTN_SW1		0
+
+#define GL_AR750_GPIO_I2C_SCL		16
+#define GL_AR750_GPIO_I2C_SDA		17
+
+#define GL_AR750_GPIO_USB_POWER		2
+
+#define GL_AR750_KEYS_POLL_INTERVAL	20
+#define GL_AR750_KEYS_DEBOUNCE_INTERVAL	(3 * GL_AR750_KEYS_POLL_INTERVAL)
+
+#define GL_AR750_MAC0_OFFSET		0
+#define GL_AR750_WMAC2G_CALDATA_OFFSET	0x1000
+#define GL_AR750_WMAC5G_CALDATA_OFFSET	0x5000
+
+static struct gpio_led gl_ar750_leds_gpio[] __initdata = {
+	{
+		.name		= "gl-ar750:white:power",
+		.gpio		= GL_AR750_GPIO_LED_POWER,
+		.default_state	= LEDS_GPIO_DEFSTATE_KEEP,
+		.active_low	= 1,
+	}, {
+		.name		= "gl-ar750:white:wlan2g",
+		.gpio		= GL_AR750_GPIO_LED_WLAN2G,
+		.active_low	= 1,
+	}, {
+		.name		= "gl-ar750:white:wlan5g",
+		.gpio		= GL_AR750_GPIO_LED_WLAN5G,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button gl_ar750_gpio_keys[] __initdata = {
+	{
+		.desc			= "reset",
+		.type			= EV_KEY,
+		.code			= KEY_RESTART,
+		.debounce_interval	= GL_AR750_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= GL_AR750_GPIO_BTN_RESET,
+		.active_low		= 1,
+	}, {
+		.desc			= "sw1",
+		.type			= EV_KEY,
+		.code			= BTN_0,
+		.debounce_interval	= GL_AR750_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= GL_AR750_GPIO_BTN_SW1,
+		.active_low		= 1,
+	},
+};
+
+static struct i2c_gpio_platform_data gl_ar750_i2c_gpio_data = {
+	.sda_pin = GL_AR750_GPIO_I2C_SDA,
+	.scl_pin = GL_AR750_GPIO_I2C_SCL,
+};
+
+static struct platform_device gl_ar750_i2c_gpio = {
+	.name	= "i2c-gpio",
+	.id	= 0,
+	.dev	= {
+		.platform_data = &gl_ar750_i2c_gpio_data,
+	},
+};
+
+static void __init gl_ar750_setup(void)
+{
+	u8 *art = (u8 *) KSEG1ADDR(0x1f050000);
+
+	ath79_register_m25p80(NULL);
+
+	ath79_setup_ar933x_phy4_switch(false, false);
+	ath79_register_mdio(0, 0x0);
+
+	ath79_switch_data.phy4_mii_en = 1;
+	ath79_switch_data.phy_poll_mask = 0xfc;
+
+	/* WAN */
+	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, art + GL_AR750_MAC0_OFFSET, 0);
+	ath79_register_eth(0);
+
+	/* LAN */
+	ath79_eth1_data.duplex = DUPLEX_FULL;
+	ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_GMII;
+	ath79_init_mac(ath79_eth1_data.mac_addr, art + GL_AR750_MAC0_OFFSET, 1);
+	ath79_register_eth(1);
+
+	/* Disable JTAG (enables GPIO0-3) */
+	ath79_gpio_function_enable(AR934X_GPIO_FUNC_JTAG_DISABLE);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(gl_ar750_leds_gpio),
+				 gl_ar750_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1, GL_AR750_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(gl_ar750_gpio_keys),
+					gl_ar750_gpio_keys);
+
+	gpio_request_one(GL_AR750_GPIO_USB_POWER,
+			 GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
+			 "USB power");
+
+	platform_device_register(&gl_ar750_i2c_gpio);
+
+	ath79_register_usb();
+
+	ath79_register_wmac(art + GL_AR750_WMAC2G_CALDATA_OFFSET, NULL);
+
+	ap91_pci_init(art + GL_AR750_WMAC5G_CALDATA_OFFSET, NULL);
+}
+
+MIPS_MACHINE(ATH79_MACH_GL_AR750, "GL-AR750", "GL.iNet GL-AR750",
+	     gl_ar750_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 4afda05638..1a2c0386f8 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -114,6 +114,7 @@ enum ath79_mach_type {
 	ATH79_MACH_GL_AR150,			/* GL-AR150 support */
 	ATH79_MACH_GL_AR300,			/* GL-AR300 */
 	ATH79_MACH_GL_AR300M,			/* GL-AR300M */
+	ATH79_MACH_GL_AR750,			/* GL.iNet GL-AR750 */
 	ATH79_MACH_GL_DOMINO,			/* Domino */
 	ATH79_MACH_GL_INET,			/* GL-CONNECT GL-INET */
 	ATH79_MACH_GL_MIFI,			/* GL-MIFI support */