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-rw-r--r--target/linux/cns3xxx/patches-2.6.31/209-cns3xxx_watchdog_support.patch496
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 af9a601..0000000
--- 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
generated by cgit v1.1 at 2024-07-23 10:20:46 +0000