ramips: rt305x: add kernel support for the Planex MZK-W300NH2 Router

This is a Japanese market router, for details check
http://www.planex.co.jp/product/router/mzk-w300nh2/. It has only 16MB
RAM, but base OpenWRT install worked fine for days without issues.
Even an image with built-in Luci worked, but don't expect smooth
experience, due to the lack of RAM. Wifi was not extensively tested,
but seems it is working. GPIO LEDs & buttons, factory flash image and
switch config are confirmed working. Tested against revision 34882 +
this patch.

[juhosg: move user-space support and image generation changes into
separate patches]

Signed-off-by: Samir Ibradžić <sibradzic@gmail.com>
Patchwork: http://patchwork.openwrt.org/patch/3077/
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 34925

target/linux/ramips/files/arch/mips/include/asm/mach-ralink/machine.h

@@ -62,6 +62,7 @@ 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_MZKW300NH2,		/* Planex MZK-W300NH2 Router */
 	RAMIPS_MACH_XDXRN502J,          /* unknown XDX-RN502J */
 	RAMIPS_MACH_UR_336UN,		/* UPVEL ROUTER */
 

target/linux/ramips/files/arch/mips/ralink/rt305x/Kconfig

@@ -189,6 +189,11 @@ config RT305X_MACH_NBG_419N
 	select RALINK_DEV_GPIO_BUTTONS
 	select RALINK_DEV_GPIO_LEDS
 
+config RT305X_MACH_MZKW300NH2
+	bool "Planex MZK-W300NH2 Router support"
+	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

target/linux/ramips/files/arch/mips/ralink/rt305x/Makefile

@@ -49,4 +49,5 @@ obj-$(CONFIG_RT305X_MACH_WL_330N3G)	+= mach-wl-330n3g.o
 obj-$(CONFIG_RT305X_MACH_WL341V3)	+= mach-wl341v3.o
 obj-$(CONFIG_RT305X_MACH_WL351)		+= mach-wl351.o
 obj-$(CONFIG_RT305X_MACH_WR6202)	+= mach-wr6202.o
+obj-$(CONFIG_RT305X_MACH_MZKW300NH2) 	+= mach-mzk-w300nh2.o
 obj-$(CONFIG_RT305X_MACH_XDX_RN502J)    += mach-xdx-rn502j.o

target/linux/ramips/files/arch/mips/ralink/rt305x/mach-mzk-w300nh2.c

@@ -0,0 +1,94 @@
+/*
+ *  Planex MZK-W300NH2 board support
+ *
+ *  Copyright (C) 2012 Samir Ibradžić sibradzic@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/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 MZKW300NH2_GPIO_BUTTON_RESET     0	/* active low */
+#define MZKW300NH2_GPIO_BUTTON_WPS      12	/* active low */
+#define MZKW300NH2_GPIO_SWITCH_MODE_RT	13	/* active low */
+
+#define MZKW300NH2_GPIO_LED_POWER        9
+#define MZKW300NH2_GPIO_LED_WLAN        14
+#define MZKW300NH2_GPIO_LED_WPS         11
+
+#define MZKW300NH2_KEYS_POLL_INTERVAL   20
+#define MZKW300NH2_KEYS_DEBOUNCE_INTERVAL (3 * MZKW300NH2_KEYS_POLL_INTERVAL)
+
+static struct gpio_led mzkw300nh2_leds_gpio[] __initdata = {
+	{
+		.name		= "mzkw300nh2:green:power",
+		.gpio		= MZKW300NH2_GPIO_LED_POWER,
+		.active_low	= 1,
+	}, {
+		.name		= "mzkw300nh2:amber:wlan",
+		.gpio		= MZKW300NH2_GPIO_LED_WLAN,
+		.active_low	= 1,
+	}, {
+		.name		= "mzkw300nh2:amber:wps",
+		.gpio		= MZKW300NH2_GPIO_LED_WPS,
+		.active_low	= 1,
+	}
+};
+
+static struct gpio_keys_button mzkw300nh2_gpio_buttons[] __initdata = {
+	{
+		.desc		= "wps",
+		.type		= EV_KEY,
+		.code		= KEY_WPS_BUTTON,
+		.debounce_interval = MZKW300NH2_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= MZKW300NH2_GPIO_BUTTON_WPS,
+		.active_low	= 1,
+	}, {
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = MZKW300NH2_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= MZKW300NH2_GPIO_BUTTON_RESET,
+		.active_low	= 1,
+	}, {
+		.desc		= "rt",
+		.type		= EV_KEY,
+		.code		= BTN_0,
+		.debounce_interval = MZKW300NH2_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= MZKW300NH2_GPIO_SWITCH_MODE_RT,
+		.active_low	= 1,
+	}
+};
+
+static void __init mzkw300nh2_init(void)
+{
+	rt305x_gpio_init(RT305X_GPIO_MODE_UART0(RT305X_GPIO_MODE_GPIO) |
+			 RT305X_GPIO_MODE_I2C |
+			 RT305X_GPIO_MODE_SPI |
+			 RT305X_GPIO_MODE_JTAG);
+
+	rt305x_register_flash(0);
+	rt305x_esw_data.vlan_config = RT305X_ESW_VLAN_CONFIG_LLLLW;
+	rt305x_register_ethernet();
+	ramips_register_gpio_leds(-1, ARRAY_SIZE(mzkw300nh2_leds_gpio),
+				  mzkw300nh2_leds_gpio);
+	ramips_register_gpio_buttons(-1, MZKW300NH2_KEYS_POLL_INTERVAL,
+				     ARRAY_SIZE(mzkw300nh2_gpio_buttons),
+				     mzkw300nh2_gpio_buttons);
+	rt305x_register_wifi();
+	rt305x_register_wdt();
+}
+
+MIPS_MACHINE(RAMIPS_MACH_MZKW300NH2, "MZK-W300NH2", "Planex MZK-W300NH2",
+	      mzkw300nh2_init);

target/linux/ramips/rt305x/config-3.6

@@ -109,6 +109,7 @@ CONFIG_RT305X_MACH_FONERA20N=y
 CONFIG_RT305X_MACH_FREESTATION5=y
 CONFIG_RT305X_MACH_HW550_3G=y
 CONFIG_RT305X_MACH_MOFI3500_3GN=y
+CONFIG_RT305X_MACH_MZKW300NH2=y
 CONFIG_RT305X_MACH_NBG_419N=y
 CONFIG_RT305X_MACH_NW718=y
 CONFIG_RT305X_MACH_OMNI_EMB=y

target/linux/ramips/rt305x/config-3.7

@@ -119,6 +119,7 @@ CONFIG_RT305X_MACH_FONERA20N=y
 CONFIG_RT305X_MACH_FREESTATION5=y
 CONFIG_RT305X_MACH_HW550_3G=y
 CONFIG_RT305X_MACH_MOFI3500_3GN=y
+CONFIG_RT305X_MACH_MZKW300NH2=y
 CONFIG_RT305X_MACH_NBG_419N=y
 CONFIG_RT305X_MACH_NW718=y
 CONFIG_RT305X_MACH_OMNI_EMB=y