ramips: add support for unbranded XDX-RN502J board

This patch adds support for routers using a PCB marked XDX-RN502J
V2.0, such as some unbranded routers like this:

http://www.mediafire.com/?8acv87h6snn9fj6
http://www.mediafire.com/?do7xonw7scor4kn
http://www.mediafire.com/?1ad49zvx3e7jyix
http://www.mediafire.com/?i46cqiq66maa197

http://www.aliexpress.com/product-fm/516397994-Free-Shipping-300M-3G-WAN-Wireless-N-WiFi-USB-AP-Router-2-Antennas-wholesalers.html

some reports also state the Aceex 22Y uses the same board.

more information can be found in the following openwrt forum post
https://forum.openwrt.org/viewtopic.php?id=34878

[juhosg: fix checkpatch warnings, use the GENERIC_4M template]

Signed-off-by: bruno schwander <bruno@tinkerbox.org>

SVN-Revision: 30809

4 files changed, 86 insertions, 0 deletions

diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/machine.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/machine.h
index cfb6bc61aa..8234164424 100644
--- a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/machine.h
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/machine.h
@@ -49,6 +49,7 @@ enum ramips_mach_type {
 	RAMIPS_MACH_WL351,		/* Sitecom WL-351 v1 002 */
 	RAMIPS_MACH_WR512_3GN,		/* SH-WR512NU/WS-WR512N1-like 3GN*/
 	RAMIPS_MACH_WR6202,		/* Accton WR6202 */
+	RAMIPS_MACH_XDXRN502J,          /* unknown XDX-RN502J */
 
 	/* RT3662 based machines */
 	RAMIPS_MACH_RT_N56U,		/* Asus RT-N56U */
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt305x/Kconfig b/target/linux/ramips/files/arch/mips/ralink/rt305x/Kconfig
index ae05190ec4..1bf960f7eb 100644
--- a/target/linux/ramips/files/arch/mips/ralink/rt305x/Kconfig
+++ b/target/linux/ramips/files/arch/mips/ralink/rt305x/Kconfig
@@ -121,6 +121,11 @@ config RT305X_MACH_NBG_419N
 	select RALINK_DEV_GPIO_BUTTONS
 	select RALINK_DEV_GPIO_LEDS
 
+config RT305X_MACH_XDX_RN502J
+	bool "Unknown board XDX-RN502J"
+	select RALINK_DEV_GPIO_BUTTONS
+	select RALINK_DEV_GPIO_LEDS
+
 endmenu
 
 endif
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt305x/Makefile b/target/linux/ramips/files/arch/mips/ralink/rt305x/Makefile
index ce1d568237..aec57a0116 100644
--- a/target/linux/ramips/files/arch/mips/ralink/rt305x/Makefile
+++ b/target/linux/ramips/files/arch/mips/ralink/rt305x/Makefile
@@ -35,3 +35,4 @@ obj-$(CONFIG_RT305X_MACH_WR512_3GN)	+= mach-wr512-3gn.o
 obj-$(CONFIG_RT305X_MACH_WL341V3)	+= mach-wl341v3.o
 obj-$(CONFIG_RT305X_MACH_WL351)		+= mach-wl351.o
 obj-$(CONFIG_RT305X_MACH_WR6202)	+= mach-wr6202.o
+obj-$(CONFIG_RT305X_MACH_XDX_RN502J)    += mach-xdx-rn502j.o
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt305x/mach-xdx-rn502j.c b/target/linux/ramips/files/arch/mips/ralink/rt305x/mach-xdx-rn502j.c
new file mode 100644
index 0000000000..f7ef353262
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt305x/mach-xdx-rn502j.c
@@ -0,0 +1,79 @@
+/*
+ *  Unknown router name/model, PCB marked with XDX-RN502J
+ *
+ *  Copyright (C) 2011 Bruno Schwander bruno@tinkerbox.org
+ *
+ *  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/init.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-ralink/machine.h>
+#include <asm/mach-ralink/dev-gpio-buttons.h>
+#include <asm/mach-ralink/dev-gpio-leds.h>
+#include <asm/mach-ralink/rt305x.h>
+#include <asm/mach-ralink/rt305x_regs.h>
+
+#include "devices.h"
+
+#define XDXRN502J_GPIO_BUTTON_RESET	12
+#define XDXRN502J_GPIO_LED_WIFI		7
+#define XDXRN502J_GPIO_LED_POWER	9
+
+#define XDXRN502J_BUTTONS_POLL_INTERVAL	20
+#define XDXRN502J_BUTTONS_DEBOUNCE_INTERVAL (3 * XDXRN502J_BUTTONS_POLL_INTERVAL)
+
+
+static struct gpio_led xdxrn502j_leds_gpio[] __initdata = {
+	{
+		.name		= "xdxrn502j:green:wifi",
+		.gpio		= XDXRN502J_GPIO_LED_WIFI,
+		.active_low	= 1,
+	}, {
+		.name		= "xdxrn502j:green:power",
+		.gpio		= XDXRN502J_GPIO_LED_POWER,
+		.active_low	= 1,
+	}
+};
+
+static struct gpio_keys_button xdxrn502j_gpio_buttons[] __initdata = {
+	{
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = XDXRN502J_BUTTONS_DEBOUNCE_INTERVAL,
+		.gpio		= XDXRN502J_GPIO_BUTTON_RESET,
+		.active_low	= 1,
+	}
+};
+
+#define XDXRN502J_GPIO_MODE \
+	((RT305X_GPIO_MODE_GPIO << RT305X_GPIO_MODE_UART0_SHIFT) | \
+	 RT305X_GPIO_MODE_MDIO)
+
+static void __init xdxrn502j_init(void)
+{
+	rt305x_gpio_init(XDXRN502J_GPIO_MODE);
+
+	rt305x_register_flash(0);
+
+	rt305x_esw_data.vlan_config = RT305X_ESW_VLAN_CONFIG_WLLLL;
+	rt305x_register_ethernet();
+
+	ramips_register_gpio_leds(-1, ARRAY_SIZE(xdxrn502j_leds_gpio),
+				  xdxrn502j_leds_gpio);
+
+	ramips_register_gpio_buttons(-1, XDXRN502J_BUTTONS_POLL_INTERVAL,
+				     ARRAY_SIZE(xdxrn502j_gpio_buttons),
+				     xdxrn502j_gpio_buttons);
+
+	rt305x_register_wifi();
+	rt305x_register_wdt();
+	rt305x_register_usb();
+}
+
+MIPS_MACHINE(RAMIPS_MACH_XDXRN502J, "XDXRN502J", "XDX RN502J",
+	     xdxrn502j_init);