ar71xx: add support for ALFA Network AP91-5G

ALFA Network AP91-5G is a 5 GHz outdoor AP/CPE board, based on Atheros
AR7240 + AR9280.

Specification:

- 400/400/200 MHz (CPU/DDR/AHB)
- 32 MB of RAM (DDR1)
- 8 MB of FLASH (SPI NOR)
- 1x 10/100 Mbps Ethernet, with passive PoE support (24 V)
- 1T1R 5 GHz (AR9280), with ext. PA (SE5004L) and LNA, up to 27 dBm
- 6x LED (5 are driven by GPIO)
- 1x button (reset)
- external h/w watchdog (EM6324QYSP5B, disabled and not used)
- header for optional 802.3at/af PoE module
- DC jack for main power input (optional, not installed by default)
- UART and LEDs headers on PCB

Flash instruction:

Use "factory" image in vendor GUI (in case of problems, make sure your
board has up to date firmware). Alternatively, TFTP in U-Boot can be
used: select option "2. Load system code then write to Flash via TFTP"
during early boot and use "sysupgrade" image.

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

4 files changed, 129 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 1198fcb74b..f2717e86e9 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -225,6 +225,15 @@ config ATH79_MACH_AP90Q
 	select ATH79_DEV_M25P80
 	select ATH79_DEV_WMAC
 
+config ATH79_MACH_AP91_5G
+	bool "ALFA Network AP91-5G support"
+	select SOC_AR724X
+	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
+
 config ATH79_MACH_AP96
 	bool "Atheros AP96 board support"
 	select SOC_AR71XX
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Makefile b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
index 455af762e3..0e581005d7 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Makefile
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Makefile
@@ -57,6 +57,7 @@ obj-$(CONFIG_ATH79_MACH_AP147)			+= mach-ap147.o
 obj-$(CONFIG_ATH79_MACH_AP152)			+= mach-ap152.o
 obj-$(CONFIG_ATH79_MACH_AP531B0)		+= mach-ap531b0.o
 obj-$(CONFIG_ATH79_MACH_AP90Q)			+= mach-ap90q.o
+obj-$(CONFIG_ATH79_MACH_AP91_5G)		+= mach-ap91-5g.o
 obj-$(CONFIG_ATH79_MACH_AP96)			+= mach-ap96.o
 obj-$(CONFIG_ATH79_MACH_ARCHER_C25_V1)		+= mach-archer-c25-v1.o
 obj-$(CONFIG_ATH79_MACH_ARCHER_C58_V1)		+= mach-archer-c59-v1.o
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-ap91-5g.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-ap91-5g.c
new file mode 100644
index 0000000000..64b9430381
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-ap91-5g.c
@@ -0,0 +1,118 @@
+/*
+ * ALFA Network AP91-5G 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/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 "machtypes.h"
+
+#define AP91_5G_GPIO_LED_LAN		17
+#define AP91_5G_GPIO_LED_SIGNAL1	12
+#define AP91_5G_GPIO_LED_SIGNAL2	8
+#define AP91_5G_GPIO_LED_SIGNAL3	6
+#define AP91_5G_GPIO_LED_SIGNAL4	7
+
+#define AP91_5G_GPIO_WDT_EN		1
+#define AP91_5G_GPIO_WDT_IN		0
+
+#define AP91_5G_GPIO_BTN_RESET		11
+
+#define AP91_5G_KEYS_POLL_INTERVAL	20
+#define AP91_5G_KEYS_DEBOUNCE_INTERVAL	(3 * AP91_5G_KEYS_POLL_INTERVAL)
+
+#define AP91_5G_WMAC_CALDATA_OFFSET	0x1000
+
+static struct gpio_led ap91_5g_leds_gpio[] __initdata = {
+	{
+		.name		= "ap91-5g:green:lan",
+		.gpio		= AP91_5G_GPIO_LED_LAN,
+		.active_low	= 1,
+	}, {
+		.name		= "ap91-5g:red:signal1",
+		.gpio		= AP91_5G_GPIO_LED_SIGNAL1,
+		.active_low	= 1,
+	}, {
+		.name		= "ap91-5g:orange:signal2",
+		.gpio		= AP91_5G_GPIO_LED_SIGNAL2,
+		.active_low	= 1,
+	}, {
+		.name		= "ap91-5g:green:signal3",
+		.gpio		= AP91_5G_GPIO_LED_SIGNAL3,
+		.active_low	= 1,
+	}, {
+		.name		= "ap91-5g:green:signal4",
+		.gpio		= AP91_5G_GPIO_LED_SIGNAL4,
+		.active_low	= 1,
+	},
+};
+
+static struct gpio_keys_button ap91_5g_gpio_keys[] __initdata = {
+	{
+		.desc			= "reset",
+		.type			= EV_KEY,
+		.code			= KEY_RESTART,
+		.debounce_interval	= AP91_5G_KEYS_DEBOUNCE_INTERVAL,
+		.gpio			= AP91_5G_GPIO_BTN_RESET,
+		.active_low		= 1,
+	},
+};
+
+static void __init ap91_5g_setup(void)
+{
+	u8 *art = (u8 *) KSEG1ADDR(0x1fff0000);
+
+	ath79_gpio_function_setup(AR724X_GPIO_FUNC_JTAG_DISABLE,
+				  AR724X_GPIO_FUNC_ETH_SWITCH_LED4_EN);
+
+	gpio_set_value(AP91_5G_GPIO_LED_LAN, 1);
+	gpio_set_value(AP91_5G_GPIO_LED_SIGNAL3, 1);
+	gpio_set_value(AP91_5G_GPIO_LED_SIGNAL4, 1);
+
+	ath79_register_m25p80(NULL);
+
+	ath79_register_mdio(0, 0x0);
+
+	/* LAN */
+	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, 0);
+	ath79_register_eth(0);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(ap91_5g_leds_gpio),
+				 ap91_5g_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1, AP91_5G_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(ap91_5g_gpio_keys),
+					ap91_5g_gpio_keys);
+
+	gpio_request_one(AP91_5G_GPIO_WDT_IN,
+			 GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED,
+			 "WDT input");
+
+	gpio_request_one(AP91_5G_GPIO_WDT_EN,
+			 GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED,
+			 "WDT enable");
+
+	ap91_pci_init(art + AP91_5G_WMAC_CALDATA_OFFSET, NULL);
+}
+
+MIPS_MACHINE(ATH79_MACH_AP91_5G, "AP91-5G", "ALFA Network AP91-5G",
+	     ap91_5g_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 0f536f0ec5..c2cb8b6126 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -41,6 +41,7 @@ enum ath79_mach_type {
 	ATH79_MACH_AP152,			/* Atheros AP152 reference board */
 	ATH79_MACH_AP531B0,			/* Rockeetech AP531B0 */
 	ATH79_MACH_AP90Q,			/* YunCore AP90Q */
+	ATH79_MACH_AP91_5G,			/* ALFA Network AP91-5G */
 	ATH79_MACH_AP96,			/* Atheros AP96 */
 	ATH79_MACH_ARCHER_C25_V1,		/* TP-LINK Archer C25 V1 board */
 	ATH79_MACH_ARCHER_C5,			/* TP-LINK Archer C5 board */