x86: add support for the RDC R-321x SoC

This patch adds support for the RDC R-321x system-on-chip,
also known as R-861x-(G). It uses the generic GPIO API and
has support for the on-chip hardware watchdog.

Build-fix from: Randy Dunlap <randy.dunlap@oracle.com>

Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/Kconfig

@@ -291,6 +291,18 @@ config X86_ES7000
 	  Only choose this option if you have such a system, otherwise you
 	  should say N here.
 
+config X86_RDC321X
+	bool "RDC R-321x SoC"
+	depends on X86_32
+	select M486
+	select X86_REBOOTFIXUPS
+	select GENERIC_GPIO
+	select LEDS_GPIO
+	help
+	  This option is needed for RDC R-321x system-on-chip, also known
+	  as R-8610-(G).
+	  If you don't have one of these chips, you should say N here.
+
 config X86_VSMP
 	bool "Support for ScaleMP vSMP"
 	depends on X86_64 && PCI
@@ -637,7 +649,7 @@ config X86_REBOOTFIXUPS
 	  system.
 
 	  Currently, the only fixup is for the Geode machines using
-	  CS5530A and CS5536 chipsets.
+	  CS5530A and CS5536 chipsets and the RDC R-321x SoC.
 
 	  Say Y if you want to enable the fixup. Currently, it's safe to
 	  enable this option even if you don't need it.

arch/x86/Makefile

@@ -139,6 +139,11 @@ mflags-$(CONFIG_X86_ES7000)	:= -Iinclude/asm-x86/mach-es7000
 fcore-$(CONFIG_X86_ES7000)	:= arch/x86/mach-es7000/
 mcore-$(CONFIG_X86_ES7000)	:= arch/x86/mach-default/
 
+# RDC R-321x subarch support
+mflags-$(CONFIG_X86_RDC321X)	:= -Iinclude/asm-x86/mach-rdc321x
+mcore-$(CONFIG_X86_RDC321X)	:= arch/x86/mach-default
+core-$(CONFIG_X86_RDC321X)	+= arch/x86/mach-rdc321x/
+
 # default subarch .h files
 mflags-y += -Iinclude/asm-x86/mach-default
 

arch/x86/mach-rdc321x/Makefile

@@ -0,0 +1,5 @@
+#
+# Makefile for the RDC321x specific parts of the kernel
+#
+obj-$(CONFIG_X86_RDC321X)        := gpio.o platform.o wdt.o
+

arch/x86/mach-rdc321x/gpio.c

@@ -0,0 +1,91 @@
+/*
+ *  Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
+ *  	RDC321x architecture specific GPIO support
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ */
+
+#include <linux/autoconf.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+
+#include <asm/mach-rdc321x/rdc321x_defs.h>
+
+static inline int rdc_gpio_is_valid(unsigned gpio)
+{
+	return (gpio <= RDC_MAX_GPIO);
+}
+
+static unsigned int rdc_gpio_read(unsigned gpio)
+{
+	unsigned int val;
+
+	val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x84:0x48));
+	outl(val, RDC3210_CFGREG_ADDR);
+	udelay(10);
+	val = inl(RDC3210_CFGREG_DATA);
+	val |= (0x1 << (gpio & 0x1F));
+	outl(val, RDC3210_CFGREG_DATA);
+	udelay(10);
+	val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x88:0x4C));
+	outl(val, RDC3210_CFGREG_ADDR);
+	udelay(10);
+	val = inl(RDC3210_CFGREG_DATA);
+
+	return val;
+}
+
+static void rdc_gpio_write(unsigned int val)
+{
+	if (val) {
+		outl(val, RDC3210_CFGREG_DATA);
+		udelay(10);
+	}
+}
+
+int rdc_gpio_get_value(unsigned gpio)
+{
+	if (rdc_gpio_is_valid(gpio))
+		return (int)rdc_gpio_read(gpio);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL(rdc_gpio_get_value);
+
+void rdc_gpio_set_value(unsigned gpio, int value)
+{
+	unsigned int val;
+
+	if (!rdc_gpio_is_valid(gpio))
+		return;
+
+	val = rdc_gpio_read(gpio);
+
+	if (value)
+		val &= ~(0x1 << (gpio & 0x1F));
+	else
+		val |= (0x1 << (gpio & 0x1F));
+
+	rdc_gpio_write(val);
+}
+EXPORT_SYMBOL(rdc_gpio_set_value);
+
+int rdc_gpio_direction_input(unsigned gpio)
+{
+	return 0;
+}
+EXPORT_SYMBOL(rdc_gpio_direction_input);
+
+int rdc_gpio_direction_output(unsigned gpio, int value)
+{
+	return 0;
+}
+EXPORT_SYMBOL(rdc_gpio_direction_output);
+
+

arch/x86/mach-rdc321x/platform.c

@@ -0,0 +1,68 @@
+/*
+ *  Generic RDC321x platform devices
+ *
+ *  Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the
+ *  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA  02110-1301, USA.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/version.h>
+#include <linux/leds.h>
+
+#include <asm/gpio.h>
+
+/* LEDS */
+static struct gpio_led default_leds[] = {
+	{ .name = "rdc:dmz", .gpio = 1, },
+};
+
+static struct gpio_led_platform_data rdc321x_led_data = {
+	.num_leds = ARRAY_SIZE(default_leds),
+	.leds = default_leds,
+};
+
+static struct platform_device rdc321x_leds = {
+	.name = "leds-gpio",
+	.id = -1,
+	.dev = {
+		.platform_data = &rdc321x_led_data,
+	}
+};
+
+/* Watchdog */
+static struct platform_device rdc321x_wdt = {
+	.name = "rdc321x-wdt",
+	.id = -1,
+	.num_resources = 0,
+};
+
+static struct platform_device *rdc321x_devs[] = {
+	&rdc321x_leds,
+	&rdc321x_wdt
+};
+
+static int __init rdc_board_setup(void)
+{
+	return platform_add_devices(rdc321x_devs, ARRAY_SIZE(rdc321x_devs));
+}
+
+arch_initcall(rdc_board_setup);