diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig | 14 | ||||
| -rw-r--r-- | arch/x86/Makefile | 5 | ||||
| -rw-r--r-- | arch/x86/mach-rdc321x/Makefile | 5 | ||||
| -rw-r--r-- | arch/x86/mach-rdc321x/gpio.c | 91 | ||||
| -rw-r--r-- | arch/x86/mach-rdc321x/platform.c | 68 | ||||
| -rw-r--r-- | arch/x86/mach-rdc321x/wdt.c | 275 |
6 files changed, 457 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 32e267186035..92dc919c7640 100644 --- a/arch/x86/Kconfig +++ b/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. diff --git a/arch/x86/Makefile b/arch/x86/Makefile index e2ffccfd6af6..b08f18261df6 100644 --- a/arch/x86/Makefile +++ b/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 diff --git a/arch/x86/mach-rdc321x/Makefile b/arch/x86/mach-rdc321x/Makefile new file mode 100644 index 000000000000..1faac8125e3d --- /dev/null +++ b/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 + diff --git a/arch/x86/mach-rdc321x/gpio.c b/arch/x86/mach-rdc321x/gpio.c new file mode 100644 index 000000000000..031269163bd6 --- /dev/null +++ b/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); + + diff --git a/arch/x86/mach-rdc321x/platform.c b/arch/x86/mach-rdc321x/platform.c new file mode 100644 index 000000000000..dda6024a5862 --- /dev/null +++ b/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); diff --git a/arch/x86/mach-rdc321x/wdt.c b/arch/x86/mach-rdc321x/wdt.c new file mode 100644 index 000000000000..ec5625ae7061 --- /dev/null +++ b/arch/x86/mach-rdc321x/wdt.c @@ -0,0 +1,275 @@ +/* + * RDC321x watchdog driver + * + * Copyright (C) 2007 Florian Fainelli <florian@openwrt.org> + * + * This driver is highly inspired from the cpu5_wdt driver + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/miscdevice.h> +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/timer.h> +#include <linux/completion.h> +#include <linux/jiffies.h> +#include <linux/platform_device.h> +#include <linux/watchdog.h> +#include <linux/io.h> +#include <linux/uaccess.h> + +#include <asm/mach-rdc321x/rdc321x_defs.h> + +#define RDC_WDT_MASK 0x80000000 /* Mask */ +#define RDC_WDT_EN 0x00800000 /* Enable bit */ +#define RDC_WDT_WTI 0x00200000 /* Generate CPU reset/NMI/WDT on timeout */ +#define RDC_WDT_RST 0x00100000 /* Reset bit */ +#define RDC_WDT_WIF 0x00040000 /* WDT IRQ Flag */ +#define RDC_WDT_IRT 0x00000100 /* IRQ Routing table */ +#define RDC_WDT_CNT 0x00000001 /* WDT count */ + +#define RDC_CLS_TMR 0x80003844 /* Clear timer */ + +#define RDC_WDT_INTERVAL (HZ/10+1) + +int nowayout = WATCHDOG_NOWAYOUT; +module_param(nowayout, int, 0); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); + +static int ticks = 1000; + +/* some device data */ + +static struct { + struct completion stop; + volatile int running; + struct timer_list timer; + volatile int queue; + int default_ticks; + unsigned long inuse; +} rdc321x_wdt_device; + +/* generic helper functions */ + +static void rdc321x_wdt_trigger(unsigned long unused) +{ + if (rdc321x_wdt_device.running) + ticks--; + + /* keep watchdog alive */ + outl(RDC_WDT_EN|inl(RDC3210_CFGREG_DATA), RDC3210_CFGREG_DATA); + + /* requeue?? */ + if (rdc321x_wdt_device.queue && ticks) + mod_timer(&rdc321x_wdt_device.timer, + jiffies + RDC_WDT_INTERVAL); + else { + /* ticks doesn't matter anyway */ + complete(&rdc321x_wdt_device.stop); + } + +} + +static void rdc321x_wdt_reset(void) +{ + ticks = rdc321x_wdt_device.default_ticks; +} + +static void rdc321x_wdt_start(void) +{ + if (!rdc321x_wdt_device.queue) { + rdc321x_wdt_device.queue = 1; + + /* Clear the timer */ + outl(RDC_CLS_TMR, RDC3210_CFGREG_ADDR); + + /* Enable watchdog and set the timeout to 81.92 us */ + outl(RDC_WDT_EN|RDC_WDT_CNT, RDC3210_CFGREG_DATA); + + mod_timer(&rdc321x_wdt_device.timer, + jiffies + RDC_WDT_INTERVAL); + } + + /* if process dies, counter is not decremented */ + rdc321x_wdt_device.running++; +} + +static int rdc321x_wdt_stop(void) +{ + if (rdc321x_wdt_device.running) + rdc321x_wdt_device.running = 0; + + ticks = rdc321x_wdt_device.default_ticks; + + return -EIO; +} + +/* filesystem operations */ + +static int rdc321x_wdt_open(struct inode *inode, struct file *file) +{ + if (test_and_set_bit(0, &rdc321x_wdt_device.inuse)) + return -EBUSY; + + return nonseekable_open(inode, file); +} + +static int rdc321x_wdt_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &rdc321x_wdt_device.inuse); + return 0; +} + +static int rdc321x_wdt_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + unsigned int value; + static struct watchdog_info ident = { + .options = WDIOF_CARDRESET, + .identity = "RDC321x WDT", + }; + + switch (cmd) { + case WDIOC_KEEPALIVE: + rdc321x_wdt_reset(); + break; + case WDIOC_GETSTATUS: + /* Read the value from the DATA register */ + value = inl(RDC3210_CFGREG_DATA); + if (copy_to_user(argp, &value, sizeof(int))) + return -EFAULT; + break; + case WDIOC_GETSUPPORT: + if (copy_to_user(argp, &ident, sizeof(ident))) + return -EFAULT; + break; + case WDIOC_SETOPTIONS: + if (copy_from_user(&value, argp, sizeof(int))) + return -EFAULT; + switch (value) { + case WDIOS_ENABLECARD: + rdc321x_wdt_start(); + break; + case WDIOS_DISABLECARD: + return rdc321x_wdt_stop(); + default: + return -EINVAL; + } + break; + default: + return -ENOTTY; + } + return 0; +} + +static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + if (!count) + return -EIO; + + rdc321x_wdt_reset(); + + return count; +} + +static const struct file_operations rdc321x_wdt_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .ioctl = rdc321x_wdt_ioctl, + .open = rdc321x_wdt_open, + .write = rdc321x_wdt_write, + .release = rdc321x_wdt_release, +}; + +static struct miscdevice rdc321x_wdt_misc = { + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &rdc321x_wdt_fops, +}; + +static int __devinit rdc321x_wdt_probe(struct platform_device *pdev) +{ + int err; + + err = misc_register(&rdc321x_wdt_misc); + if (err < 0) { + printk(KERN_ERR PFX "watchdog misc_register failed\n"); + return err; + } + + /* Reset the watchdog */ + outl(RDC_WDT_RST, RDC3210_CFGREG_DATA); + + init_completion(&rdc321x_wdt_device.stop); + rdc321x_wdt_device.queue = 0; + + clear_bit(0, &rdc321x_wdt_device.inuse); + + setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_trigger, 0); + + rdc321x_wdt_device.default_ticks = ticks; + + printk(KERN_INFO PFX "watchdog init success\n"); + + return 0; +} + +static int rdc321x_wdt_remove(struct platform_device *pdev) +{ + if (rdc321x_wdt_device.queue) { + rdc321x_wdt_device.queue = 0; + wait_for_completion(&rdc321x_wdt_device.stop); + } + + misc_deregister(&rdc321x_wdt_misc); + + return 0; +} + +static struct platform_driver rdc321x_wdt_driver = { + .probe = rdc321x_wdt_probe, + .remove = rdc321x_wdt_remove, + .driver = { + .owner = THIS_MODULE, + .name = "rdc321x-wdt", + }, +}; + +static int __init rdc321x_wdt_init(void) +{ + return platform_driver_register(&rdc321x_wdt_driver); +} + +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); |