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>hifive-unleashed-5.1
Florian Fainelli
Ingo Molnar
parent
0acf8e3447
commit
5e3a77e9a9
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@ -291,6 +291,18 @@ config X86_ES7000
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Only choose this option if you have such a system, otherwise you
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should say N here.
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config X86_RDC321X
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bool "RDC R-321x SoC"
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depends on X86_32
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select M486
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select X86_REBOOTFIXUPS
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select GENERIC_GPIO
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select LEDS_GPIO
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help
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This option is needed for RDC R-321x system-on-chip, also known
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as R-8610-(G).
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If you don't have one of these chips, you should say N here.
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config X86_VSMP
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bool "Support for ScaleMP vSMP"
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depends on X86_64 && PCI
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@ -637,7 +649,7 @@ config X86_REBOOTFIXUPS
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system.
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Currently, the only fixup is for the Geode machines using
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CS5530A and CS5536 chipsets.
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CS5530A and CS5536 chipsets and the RDC R-321x SoC.
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Say Y if you want to enable the fixup. Currently, it's safe to
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enable this option even if you don't need it.
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@ -139,6 +139,11 @@ mflags-$(CONFIG_X86_ES7000) := -Iinclude/asm-x86/mach-es7000
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fcore-$(CONFIG_X86_ES7000) := arch/x86/mach-es7000/
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mcore-$(CONFIG_X86_ES7000) := arch/x86/mach-default/
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# RDC R-321x subarch support
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mflags-$(CONFIG_X86_RDC321X) := -Iinclude/asm-x86/mach-rdc321x
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mcore-$(CONFIG_X86_RDC321X) := arch/x86/mach-default
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core-$(CONFIG_X86_RDC321X) += arch/x86/mach-rdc321x/
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# default subarch .h files
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mflags-y += -Iinclude/asm-x86/mach-default
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@ -0,0 +1,5 @@
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#
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# Makefile for the RDC321x specific parts of the kernel
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#
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obj-$(CONFIG_X86_RDC321X) := gpio.o platform.o wdt.o
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@ -0,0 +1,91 @@
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/*
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* Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
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* RDC321x architecture specific GPIO support
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/autoconf.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <asm/mach-rdc321x/rdc321x_defs.h>
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static inline int rdc_gpio_is_valid(unsigned gpio)
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{
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return (gpio <= RDC_MAX_GPIO);
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}
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static unsigned int rdc_gpio_read(unsigned gpio)
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{
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unsigned int val;
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val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x84:0x48));
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outl(val, RDC3210_CFGREG_ADDR);
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udelay(10);
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val = inl(RDC3210_CFGREG_DATA);
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val |= (0x1 << (gpio & 0x1F));
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outl(val, RDC3210_CFGREG_DATA);
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udelay(10);
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val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x88:0x4C));
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outl(val, RDC3210_CFGREG_ADDR);
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udelay(10);
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val = inl(RDC3210_CFGREG_DATA);
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return val;
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}
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static void rdc_gpio_write(unsigned int val)
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{
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if (val) {
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outl(val, RDC3210_CFGREG_DATA);
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udelay(10);
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}
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}
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int rdc_gpio_get_value(unsigned gpio)
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{
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if (rdc_gpio_is_valid(gpio))
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return (int)rdc_gpio_read(gpio);
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else
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return -EINVAL;
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}
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EXPORT_SYMBOL(rdc_gpio_get_value);
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void rdc_gpio_set_value(unsigned gpio, int value)
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{
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unsigned int val;
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if (!rdc_gpio_is_valid(gpio))
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return;
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val = rdc_gpio_read(gpio);
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if (value)
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val &= ~(0x1 << (gpio & 0x1F));
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else
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val |= (0x1 << (gpio & 0x1F));
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rdc_gpio_write(val);
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}
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EXPORT_SYMBOL(rdc_gpio_set_value);
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int rdc_gpio_direction_input(unsigned gpio)
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{
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return 0;
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}
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EXPORT_SYMBOL(rdc_gpio_direction_input);
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int rdc_gpio_direction_output(unsigned gpio, int value)
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{
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return 0;
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}
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EXPORT_SYMBOL(rdc_gpio_direction_output);
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@ -0,0 +1,68 @@
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/*
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* Generic RDC321x platform devices
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*
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* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/version.h>
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#include <linux/leds.h>
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#include <asm/gpio.h>
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/* LEDS */
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static struct gpio_led default_leds[] = {
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{ .name = "rdc:dmz", .gpio = 1, },
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};
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static struct gpio_led_platform_data rdc321x_led_data = {
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.num_leds = ARRAY_SIZE(default_leds),
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.leds = default_leds,
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};
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static struct platform_device rdc321x_leds = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &rdc321x_led_data,
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}
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};
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/* Watchdog */
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static struct platform_device rdc321x_wdt = {
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.name = "rdc321x-wdt",
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.id = -1,
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.num_resources = 0,
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};
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static struct platform_device *rdc321x_devs[] = {
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&rdc321x_leds,
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&rdc321x_wdt
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};
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static int __init rdc_board_setup(void)
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{
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return platform_add_devices(rdc321x_devs, ARRAY_SIZE(rdc321x_devs));
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}
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arch_initcall(rdc_board_setup);
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@ -0,0 +1,275 @@
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/*
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* RDC321x watchdog driver
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*
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* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
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*
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* This driver is highly inspired from the cpu5_wdt driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/miscdevice.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/timer.h>
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#include <linux/completion.h>
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#include <linux/jiffies.h>
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#include <linux/platform_device.h>
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#include <linux/watchdog.h>
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#include <linux/io.h>
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#include <linux/uaccess.h>
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#include <asm/mach-rdc321x/rdc321x_defs.h>
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#define RDC_WDT_MASK 0x80000000 /* Mask */
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#define RDC_WDT_EN 0x00800000 /* Enable bit */
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#define RDC_WDT_WTI 0x00200000 /* Generate CPU reset/NMI/WDT on timeout */
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#define RDC_WDT_RST 0x00100000 /* Reset bit */
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#define RDC_WDT_WIF 0x00040000 /* WDT IRQ Flag */
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#define RDC_WDT_IRT 0x00000100 /* IRQ Routing table */
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#define RDC_WDT_CNT 0x00000001 /* WDT count */
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#define RDC_CLS_TMR 0x80003844 /* Clear timer */
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#define RDC_WDT_INTERVAL (HZ/10+1)
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int nowayout = WATCHDOG_NOWAYOUT;
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module_param(nowayout, int, 0);
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MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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static int ticks = 1000;
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/* some device data */
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static struct {
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struct completion stop;
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volatile int running;
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struct timer_list timer;
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volatile int queue;
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int default_ticks;
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unsigned long inuse;
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} rdc321x_wdt_device;
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/* generic helper functions */
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static void rdc321x_wdt_trigger(unsigned long unused)
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{
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if (rdc321x_wdt_device.running)
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ticks--;
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/* keep watchdog alive */
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outl(RDC_WDT_EN|inl(RDC3210_CFGREG_DATA), RDC3210_CFGREG_DATA);
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/* requeue?? */
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if (rdc321x_wdt_device.queue && ticks)
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mod_timer(&rdc321x_wdt_device.timer,
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jiffies + RDC_WDT_INTERVAL);
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else {
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/* ticks doesn't matter anyway */
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complete(&rdc321x_wdt_device.stop);
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}
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}
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static void rdc321x_wdt_reset(void)
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{
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ticks = rdc321x_wdt_device.default_ticks;
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}
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static void rdc321x_wdt_start(void)
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{
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if (!rdc321x_wdt_device.queue) {
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rdc321x_wdt_device.queue = 1;
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/* Clear the timer */
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outl(RDC_CLS_TMR, RDC3210_CFGREG_ADDR);
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/* Enable watchdog and set the timeout to 81.92 us */
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outl(RDC_WDT_EN|RDC_WDT_CNT, RDC3210_CFGREG_DATA);
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mod_timer(&rdc321x_wdt_device.timer,
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jiffies + RDC_WDT_INTERVAL);
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}
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/* if process dies, counter is not decremented */
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rdc321x_wdt_device.running++;
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}
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static int rdc321x_wdt_stop(void)
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{
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if (rdc321x_wdt_device.running)
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rdc321x_wdt_device.running = 0;
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ticks = rdc321x_wdt_device.default_ticks;
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return -EIO;
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}
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/* filesystem operations */
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static int rdc321x_wdt_open(struct inode *inode, struct file *file)
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{
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if (test_and_set_bit(0, &rdc321x_wdt_device.inuse))
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return -EBUSY;
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return nonseekable_open(inode, file);
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}
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static int rdc321x_wdt_release(struct inode *inode, struct file *file)
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{
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clear_bit(0, &rdc321x_wdt_device.inuse);
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return 0;
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}
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static int rdc321x_wdt_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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void __user *argp = (void __user *)arg;
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unsigned int value;
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static struct watchdog_info ident = {
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.options = WDIOF_CARDRESET,
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.identity = "RDC321x WDT",
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};
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switch (cmd) {
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case WDIOC_KEEPALIVE:
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rdc321x_wdt_reset();
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break;
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case WDIOC_GETSTATUS:
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/* Read the value from the DATA register */
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value = inl(RDC3210_CFGREG_DATA);
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if (copy_to_user(argp, &value, sizeof(int)))
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return -EFAULT;
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break;
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case WDIOC_GETSUPPORT:
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if (copy_to_user(argp, &ident, sizeof(ident)))
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return -EFAULT;
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break;
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case WDIOC_SETOPTIONS:
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if (copy_from_user(&value, argp, sizeof(int)))
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return -EFAULT;
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switch (value) {
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case WDIOS_ENABLECARD:
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rdc321x_wdt_start();
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break;
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case WDIOS_DISABLECARD:
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return rdc321x_wdt_stop();
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default:
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return -EINVAL;
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}
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break;
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default:
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return -ENOTTY;
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}
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return 0;
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}
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static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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if (!count)
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return -EIO;
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rdc321x_wdt_reset();
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return count;
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}
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static const struct file_operations rdc321x_wdt_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.ioctl = rdc321x_wdt_ioctl,
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.open = rdc321x_wdt_open,
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.write = rdc321x_wdt_write,
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.release = rdc321x_wdt_release,
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};
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static struct miscdevice rdc321x_wdt_misc = {
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.minor = WATCHDOG_MINOR,
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.name = "watchdog",
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.fops = &rdc321x_wdt_fops,
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};
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static int __devinit rdc321x_wdt_probe(struct platform_device *pdev)
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{
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int err;
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err = misc_register(&rdc321x_wdt_misc);
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if (err < 0) {
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printk(KERN_ERR PFX "watchdog misc_register failed\n");
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return err;
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}
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/* Reset the watchdog */
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outl(RDC_WDT_RST, RDC3210_CFGREG_DATA);
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init_completion(&rdc321x_wdt_device.stop);
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rdc321x_wdt_device.queue = 0;
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clear_bit(0, &rdc321x_wdt_device.inuse);
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setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_trigger, 0);
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rdc321x_wdt_device.default_ticks = ticks;
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printk(KERN_INFO PFX "watchdog init success\n");
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return 0;
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}
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static int rdc321x_wdt_remove(struct platform_device *pdev)
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{
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if (rdc321x_wdt_device.queue) {
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rdc321x_wdt_device.queue = 0;
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wait_for_completion(&rdc321x_wdt_device.stop);
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}
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misc_deregister(&rdc321x_wdt_misc);
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return 0;
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}
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static struct platform_driver rdc321x_wdt_driver = {
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.probe = rdc321x_wdt_probe,
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.remove = rdc321x_wdt_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = "rdc321x-wdt",
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},
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};
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static int __init rdc321x_wdt_init(void)
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{
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return platform_driver_register(&rdc321x_wdt_driver);
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}
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static void __exit rdc321x_wdt_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&rdc321x_wdt_driver);
|
||||
}
|
||||
|
||||
module_init(rdc321x_wdt_init);
|
||||
module_exit(rdc321x_wdt_exit);
|
||||
|
||||
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
|
||||
MODULE_DESCRIPTION("RDC321x watchdog driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
|
|
@ -0,0 +1,56 @@
|
|||
#ifndef _RDC321X_GPIO_H
|
||||
#define _RDC321X_GPIO_H
|
||||
|
||||
extern int rdc_gpio_get_value(unsigned gpio);
|
||||
extern void rdc_gpio_set_value(unsigned gpio, int value);
|
||||
extern int rdc_gpio_direction_input(unsigned gpio);
|
||||
extern int rdc_gpio_direction_output(unsigned gpio, int value);
|
||||
|
||||
|
||||
/* Wrappers for the arch-neutral GPIO API */
|
||||
|
||||
static inline int gpio_request(unsigned gpio, const char *label)
|
||||
{
|
||||
/* Not yet implemented */
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void gpio_free(unsigned gpio)
|
||||
{
|
||||
/* Not yet implemented */
|
||||
}
|
||||
|
||||
static inline int gpio_direction_input(unsigned gpio)
|
||||
{
|
||||
return rdc_gpio_direction_input(gpio);
|
||||
}
|
||||
|
||||
static inline int gpio_direction_output(unsigned gpio, int value)
|
||||
{
|
||||
return rdc_gpio_direction_output(gpio, value);
|
||||
}
|
||||
|
||||
static inline int gpio_get_value(unsigned gpio)
|
||||
{
|
||||
return rdc_gpio_get_value(gpio);
|
||||
}
|
||||
|
||||
static inline void gpio_set_value(unsigned gpio, int value)
|
||||
{
|
||||
rdc_gpio_set_value(gpio, value);
|
||||
}
|
||||
|
||||
static inline int gpio_to_irq(unsigned gpio)
|
||||
{
|
||||
return gpio;
|
||||
}
|
||||
|
||||
static inline int irq_to_gpio(unsigned irq)
|
||||
{
|
||||
return irq;
|
||||
}
|
||||
|
||||
/* For cansleep */
|
||||
#include <asm-generic/gpio.h>
|
||||
|
||||
#endif /* _RDC321X_GPIO_H_ */
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
#define PFX "rdc321x: "
|
||||
|
||||
/* General purpose configuration and data registers */
|
||||
#define RDC3210_CFGREG_ADDR 0x0CF8
|
||||
#define RDC3210_CFGREG_DATA 0x0CFC
|
||||
#define RDC_MAX_GPIO 0x3A
|
||||
|
|
@ -7,6 +7,8 @@
|
|||
|
||||
#ifdef CONFIG_X86_ELAN
|
||||
# define PIT_TICK_RATE 1189200 /* AMD Elan has different frequency! */
|
||||
#elif defined(CONFIG_X86_RDC321X)
|
||||
# define PIT_TICK_RATE 1041667 /* Underlying HZ for R8610 */
|
||||
#else
|
||||
# define PIT_TICK_RATE 1193182 /* Underlying HZ */
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue