diff options
Diffstat (limited to 'target/linux/cns3xxx/patches-2.6.31/209-cns3xxx_watchdog_support.patch')
-rw-r--r-- | target/linux/cns3xxx/patches-2.6.31/209-cns3xxx_watchdog_support.patch | 496 |
1 files changed, 0 insertions, 496 deletions
diff --git a/target/linux/cns3xxx/patches-2.6.31/209-cns3xxx_watchdog_support.patch b/target/linux/cns3xxx/patches-2.6.31/209-cns3xxx_watchdog_support.patch deleted file mode 100644 index af9a60152f..0000000000 --- a/target/linux/cns3xxx/patches-2.6.31/209-cns3xxx_watchdog_support.patch +++ /dev/null @@ -1,496 +0,0 @@ ---- /dev/null -+++ b/drivers/watchdog/cns3xxx_wdt.c -@@ -0,0 +1,465 @@ -+/******************************************************************************* -+ * -+ * drivers/watchdog/cns3xxx_wdt.c -+ * -+ * Watchdog timer driver for the CNS3XXX SOCs -+ * -+ * Author: Scott Shu -+ * -+ * Copyright (c) 2008 Cavium Networks -+ * -+ * This file 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. -+ * -+ * This file is distributed in the hope that it will be useful, -+ * but AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or -+ * NONINFRINGEMENT. See the GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this file; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA or -+ * visit http://www.gnu.org/licenses/. -+ * -+ * This file may also be available under a different license from Cavium. -+ * Contact Cavium Networks for more information -+ * -+ ******************************************************************************/ -+ -+#include <linux/module.h> -+#include <linux/moduleparam.h> -+#include <linux/types.h> -+#include <linux/miscdevice.h> -+#include <linux/watchdog.h> -+#include <linux/fs.h> -+#include <linux/reboot.h> -+#include <linux/init.h> -+#include <linux/interrupt.h> -+#include <linux/platform_device.h> -+#include <linux/io.h> -+#include <linux/uaccess.h> -+ -+#include <asm/hardware/arm_twd.h> -+ -+struct cns3xxx_wdt { -+ unsigned long timer_alive; -+ struct device *dev; -+ void __iomem *base; -+ int irq; -+ unsigned int perturb; -+ char expect_close; -+}; -+ -+static struct platform_device *cns3xxx_wdt_dev; -+extern unsigned int twd_timer_rate; -+static spinlock_t wdt_lock; -+ -+#define TIMER_MARGIN 60 -+static int cns3xxx_margin = TIMER_MARGIN; -+module_param(cns3xxx_margin, int, 0); -+MODULE_PARM_DESC(cns3xxx_margin, -+ "CNS3XXX timer margin in seconds. (0 < cns3xxx_margin < 65536, default=" -+ __MODULE_STRING(TIMER_MARGIN) ")"); -+ -+static int nowayout = WATCHDOG_NOWAYOUT; -+module_param(nowayout, int, 0); -+MODULE_PARM_DESC(nowayout, -+ "Watchdog cannot be stopped once started (default=" -+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); -+ -+#define ONLY_TESTING 0 -+static int cns3xxx_noboot = ONLY_TESTING; -+module_param(cns3xxx_noboot, int, 0); -+MODULE_PARM_DESC(cns3xxx_noboot, "CNS3XXX watchdog action, " -+ "set to 1 to ignore reboots, 0 to reboot (default=" -+ __MODULE_STRING(ONLY_TESTING) ")"); -+ -+/* -+ * This is the interrupt handler. Note that we only use this -+ * in testing mode, so don't actually do a reboot here. -+ */ -+static irqreturn_t cns3xxx_wdt_fire(int irq, void *arg) -+{ -+ struct cns3xxx_wdt *wdt = arg; -+ -+ /* Check it really was our interrupt */ -+ if (readl(wdt->base + TWD_WDOG_INTSTAT)) { -+ dev_printk(KERN_CRIT, wdt->dev, -+ "Triggered - Reboot ignored.\n"); -+ /* Clear the interrupt on the watchdog */ -+ writel(1, wdt->base + TWD_WDOG_INTSTAT); -+ return IRQ_HANDLED; -+ } -+ return IRQ_NONE; -+} -+ -+/* -+ * cns3xxx_wdt_keepalive - reload the timer -+ * -+ * Note that the spec says a DIFFERENT value must be written to the reload -+ * register each time. The "perturb" variable deals with this by adding 1 -+ * to the count every other time the function is called. -+ */ -+static void cns3xxx_wdt_keepalive(struct cns3xxx_wdt *wdt) -+{ -+ unsigned int count; -+ -+ /* Assume prescale is set to 256 */ -+ count = (twd_timer_rate / 256) * cns3xxx_margin; -+ -+ /* Reload the counter */ -+ spin_lock(&wdt_lock); -+ writel(count + wdt->perturb, wdt->base + TWD_WDOG_LOAD); -+ wdt->perturb = wdt->perturb ? 0 : 1; -+ spin_unlock(&wdt_lock); -+} -+ -+static void cns3xxx_wdt_stop(struct cns3xxx_wdt *wdt) -+{ -+ spin_lock(&wdt_lock); -+ writel(0x12345678, wdt->base + TWD_WDOG_DISABLE); -+ writel(0x87654321, wdt->base + TWD_WDOG_DISABLE); -+ writel(0x0, wdt->base + TWD_WDOG_CONTROL); -+ spin_unlock(&wdt_lock); -+} -+ -+static void cns3xxx_wdt_start(struct cns3xxx_wdt *wdt) -+{ -+ dev_printk(KERN_INFO, wdt->dev, "enabling watchdog.\n"); -+ -+ //spin_lock(&wdt_lock); -+ /* This loads the count register but does NOT start the count yet */ -+ cns3xxx_wdt_keepalive(wdt); -+ spin_lock(&wdt_lock); -+ -+ if (cns3xxx_noboot) { -+ /* Enable watchdog - prescale=256, watchdog mode=0, enable=1 */ -+ writel(0x0000FF01, wdt->base + TWD_WDOG_CONTROL); -+ } else { -+ /* Enable watchdog - prescale=256, watchdog mode=1, enable=1 */ -+ writel(0x0000FF09, wdt->base + TWD_WDOG_CONTROL); -+ } -+ spin_unlock(&wdt_lock); -+} -+ -+static int cns3xxx_wdt_set_heartbeat(int t) -+{ -+ if (t < 0x0001 || t > 0xFFFF) -+ return -EINVAL; -+ -+ cns3xxx_margin = t; -+ return 0; -+} -+ -+/* -+ * /dev/watchdog handling -+ */ -+static int cns3xxx_wdt_open(struct inode *inode, struct file *file) -+{ -+ struct cns3xxx_wdt *wdt = platform_get_drvdata(cns3xxx_wdt_dev); -+ -+ if (test_and_set_bit(0, &wdt->timer_alive)) -+ return -EBUSY; -+ -+ if (nowayout) -+ __module_get(THIS_MODULE); -+ -+ file->private_data = wdt; -+ -+ /* -+ * Activate timer -+ */ -+ cns3xxx_wdt_start(wdt); -+ -+ return nonseekable_open(inode, file); -+} -+ -+static int cns3xxx_wdt_release(struct inode *inode, struct file *file) -+{ -+ struct cns3xxx_wdt *wdt = file->private_data; -+ -+ /* -+ * Shut off the timer. -+ * Lock it in if it's a module and we set nowayout -+ */ -+ if (wdt->expect_close == 42) -+ cns3xxx_wdt_stop(wdt); -+ else { -+ dev_printk(KERN_CRIT, wdt->dev, -+ "unexpected close, not stopping watchdog!\n"); -+ cns3xxx_wdt_keepalive(wdt); -+ } -+ clear_bit(0, &wdt->timer_alive); -+ wdt->expect_close = 0; -+ return 0; -+} -+ -+static ssize_t cns3xxx_wdt_write(struct file *file, const char *data, -+ size_t len, loff_t *ppos) -+{ -+ struct cns3xxx_wdt *wdt = file->private_data; -+ -+ /* -+ * Refresh the timer. -+ */ -+ if (len) { -+ if (!nowayout) { -+ size_t i; -+ -+ /* In case it was set long ago */ -+ wdt->expect_close = 0; -+ -+ for (i = 0; i != len; i++) { -+ char c; -+ -+ if (get_user(c, data + i)) -+ return -EFAULT; -+ if (c == 'V') -+ wdt->expect_close = 42; -+ } -+ } -+ cns3xxx_wdt_keepalive(wdt); -+ } -+ return len; -+} -+ -+static struct watchdog_info ident = { -+ .options = WDIOF_SETTIMEOUT | -+ WDIOF_KEEPALIVEPING | -+ WDIOF_MAGICCLOSE, -+ .identity = "CNS3XXX Watchdog", -+}; -+ -+static long cns3xxx_wdt_ioctl(struct file *file, unsigned int cmd, -+ unsigned long arg) -+{ -+ struct cns3xxx_wdt *wdt = file->private_data; -+ int ret; -+ union { -+ struct watchdog_info ident; -+ int i; -+ } uarg; -+ -+ if (_IOC_DIR(cmd) && _IOC_SIZE(cmd) > sizeof(uarg)) -+ return -ENOTTY; -+ -+ if (_IOC_DIR(cmd) & _IOC_WRITE) { -+ ret = copy_from_user(&uarg, (void __user *)arg, _IOC_SIZE(cmd)); -+ if (ret) -+ return -EFAULT; -+ } -+ -+ switch (cmd) { -+ case WDIOC_GETSUPPORT: -+ uarg.ident = ident; -+ ret = 0; -+ break; -+ -+ case WDIOC_GETSTATUS: -+ case WDIOC_GETBOOTSTATUS: -+ uarg.i = 0; -+ ret = 0; -+ break; -+ -+ case WDIOC_SETOPTIONS: -+ ret = -EINVAL; -+ if (uarg.i & WDIOS_DISABLECARD) { -+ cns3xxx_wdt_stop(wdt); -+ ret = 0; -+ } -+ if (uarg.i & WDIOS_ENABLECARD) { -+ cns3xxx_wdt_start(wdt); -+ ret = 0; -+ } -+ break; -+ -+ case WDIOC_KEEPALIVE: -+ cns3xxx_wdt_keepalive(wdt); -+ ret = 0; -+ break; -+ -+ case WDIOC_SETTIMEOUT: -+ ret = cns3xxx_wdt_set_heartbeat(uarg.i); -+ if (ret) -+ break; -+ -+ cns3xxx_wdt_keepalive(wdt); -+ /* Fall */ -+ case WDIOC_GETTIMEOUT: -+ uarg.i = cns3xxx_margin; -+ ret = 0; -+ break; -+ -+ default: -+ return -ENOTTY; -+ } -+ -+ if (ret == 0 && _IOC_DIR(cmd) & _IOC_READ) { -+ ret = copy_to_user((void __user *)arg, &uarg, _IOC_SIZE(cmd)); -+ if (ret) -+ ret = -EFAULT; -+ } -+ return ret; -+} -+ -+/* -+ * System shutdown handler. Turn off the watchdog if we're -+ * restarting or halting the system. -+ */ -+static void cns3xxx_wdt_shutdown(struct platform_device *dev) -+{ -+ struct cns3xxx_wdt *wdt = platform_get_drvdata(dev); -+ -+ if (system_state == SYSTEM_RESTART || system_state == SYSTEM_HALT) -+ cns3xxx_wdt_stop(wdt); -+} -+ -+/* -+ * Kernel Interfaces -+ */ -+static const struct file_operations cns3xxx_wdt_fops = { -+ .owner = THIS_MODULE, -+ .llseek = no_llseek, -+ .write = cns3xxx_wdt_write, -+ .unlocked_ioctl = cns3xxx_wdt_ioctl, -+ .open = cns3xxx_wdt_open, -+ .release = cns3xxx_wdt_release, -+}; -+ -+static struct miscdevice cns3xxx_wdt_miscdev = { -+ .minor = WATCHDOG_MINOR, -+ .name = "watchdog", -+ .fops = &cns3xxx_wdt_fops, -+}; -+ -+static int __devinit cns3xxx_wdt_probe(struct platform_device *dev) -+{ -+ struct cns3xxx_wdt *wdt; -+ struct resource *res; -+ int ret; -+ -+ /* We only accept one device, and it must have an id of -1 */ -+ if (dev->id != -1) -+ return -ENODEV; -+ -+ res = platform_get_resource(dev, IORESOURCE_MEM, 0); -+ if (!res) { -+ ret = -ENODEV; -+ goto err_out; -+ } -+ -+ wdt = kzalloc(sizeof(struct cns3xxx_wdt), GFP_KERNEL); -+ if (!wdt) { -+ ret = -ENOMEM; -+ goto err_out; -+ } -+ -+ wdt->dev = &dev->dev; -+ wdt->irq = platform_get_irq(dev, 0); -+ if (wdt->irq < 0) { -+ ret = -ENXIO; -+ goto err_free; -+ } -+ wdt->base = ioremap(res->start, res->end - res->start + 1); -+ if (!wdt->base) { -+ ret = -ENOMEM; -+ goto err_free; -+ } -+ -+ cns3xxx_wdt_miscdev.parent = &dev->dev; -+ ret = misc_register(&cns3xxx_wdt_miscdev); -+ if (ret) { -+ dev_printk(KERN_ERR, wdt->dev, -+ "cannot register miscdev on minor=%d (err=%d)\n", -+ WATCHDOG_MINOR, ret); -+ goto err_misc; -+ } -+ -+ ret = request_irq(wdt->irq, cns3xxx_wdt_fire, IRQF_DISABLED, -+ dev->name, wdt); -+ if (ret) { -+ dev_printk(KERN_ERR, wdt->dev, -+ "cannot register IRQ%d for watchdog\n", wdt->irq); -+ goto err_irq; -+ } -+ -+ cns3xxx_wdt_stop(wdt); -+ platform_set_drvdata(dev, wdt); -+ cns3xxx_wdt_dev = dev; -+ -+ return 0; -+ -+err_irq: -+ misc_deregister(&cns3xxx_wdt_miscdev); -+err_misc: -+ platform_set_drvdata(dev, NULL); -+ iounmap(wdt->base); -+err_free: -+ kfree(wdt); -+err_out: -+ return ret; -+} -+ -+static int __devexit cns3xxx_wdt_remove(struct platform_device *dev) -+{ -+ struct cns3xxx_wdt *wdt = platform_get_drvdata(dev); -+ -+ platform_set_drvdata(dev, NULL); -+ -+ misc_deregister(&cns3xxx_wdt_miscdev); -+ -+ cns3xxx_wdt_dev = NULL; -+ -+ free_irq(wdt->irq, wdt); -+ iounmap(wdt->base); -+ kfree(wdt); -+ return 0; -+} -+ -+ -+static struct platform_driver cns3xxx_wdt_driver = { -+ .probe = cns3xxx_wdt_probe, -+ .remove = __devexit_p(cns3xxx_wdt_remove), -+ .shutdown = cns3xxx_wdt_shutdown, -+ .driver = { -+ .owner = THIS_MODULE, -+ .name = "cns3xxx-wdt", -+ }, -+}; -+ -+static char banner[] __initdata = KERN_INFO -+ "CNS3XXX Watchdog Timer, noboot=%d margin=%d sec (nowayout= %d)\n"; -+ -+static int __init cns3xxx_wdt_init(void) -+{ -+ /* -+ * Check that the margin value is within it's range; -+ * if not reset to the default -+ */ -+ if (cns3xxx_wdt_set_heartbeat(cns3xxx_margin)) { -+ cns3xxx_wdt_set_heartbeat(TIMER_MARGIN); -+ printk(KERN_INFO "cns3xxx_margin value must be 0 < cns3xxx_margin < 65536, using %d\n", -+ TIMER_MARGIN); -+ } -+ -+ printk(banner, cns3xxx_noboot, cns3xxx_margin, nowayout); -+ -+ spin_lock_init(&wdt_lock); -+ -+ return platform_driver_register(&cns3xxx_wdt_driver); -+} -+ -+static void __exit cns3xxx_wdt_exit(void) -+{ -+ platform_driver_unregister(&cns3xxx_wdt_driver); -+} -+ -+module_init(cns3xxx_wdt_init); -+module_exit(cns3xxx_wdt_exit); -+ -+MODULE_AUTHOR("Scott Shu"); -+MODULE_DESCRIPTION("CNS3XXX Watchdog Device Driver"); -+MODULE_LICENSE("GPL"); -+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); -+MODULE_ALIAS("platform:cns3xxx-wdt"); ---- a/drivers/watchdog/Kconfig -+++ b/drivers/watchdog/Kconfig -@@ -231,6 +231,15 @@ config DAVINCI_WATCHDOG - NOTE: once enabled, this timer cannot be disabled. - Say N if you are unsure. - -+config CNS3XXX_WATCHDOG -+ tristate "CNS3XXX watchdog" -+ depends on ARCH_CNS3XXX && LOCAL_TIMERS -+ help -+ Watchdog timer embedded into the CNS3XXX SoCs system. -+ -+ To compile this driver as a module, choose M here: the -+ module will be called cns3xxx_wdt. -+ - config ORION_WATCHDOG - tristate "Orion watchdog" - depends on ARCH_ORION5X || ARCH_KIRKWOOD ---- a/drivers/watchdog/Makefile -+++ b/drivers/watchdog/Makefile -@@ -41,6 +41,7 @@ obj-$(CONFIG_EP93XX_WATCHDOG) += ep93xx_ - obj-$(CONFIG_PNX4008_WATCHDOG) += pnx4008_wdt.o - obj-$(CONFIG_IOP_WATCHDOG) += iop_wdt.o - obj-$(CONFIG_DAVINCI_WATCHDOG) += davinci_wdt.o -+obj-$(CONFIG_CNS3XXX_WATCHDOG) += cns3xxx_wdt.o - obj-$(CONFIG_ORION_WATCHDOG) += orion_wdt.o - obj-$(CONFIG_COH901327_WATCHDOG) += coh901327_wdt.o - obj-$(CONFIG_STMP3XXX_WATCHDOG) += stmp3xxx_wdt.o |