+++ /dev/null
---- /dev/null
-+++ b/drivers/watchdog/ar2315-wtd.c
-@@ -0,0 +1,209 @@
-+/*
-+ * 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, see <http://www.gnu.org/licenses/>.
-+ *
-+ * Copyright (C) 2008 John Crispin <blogic@openwrt.org>
-+ * Based on EP93xx and ifxmips wdt driver
-+ */
-+
-+#include <linux/interrupt.h>
-+#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/ioport.h>
-+#include <linux/notifier.h>
-+#include <linux/reboot.h>
-+#include <linux/init.h>
-+#include <linux/platform_device.h>
-+#include <linux/io.h>
-+#include <linux/uaccess.h>
-+
-+#define DRIVER_NAME "ar2315-wdt"
-+
-+#define CLOCK_RATE 40000000
-+#define HEARTBEAT(x) (x < 1 || x > 90 ? 20 : x)
-+
-+#define WDT_REG_TIMER 0x00
-+#define WDT_REG_CTRL 0x04
-+
-+#define WDT_CTRL_ACT_NONE 0x00000000 /* No action */
-+#define WDT_CTRL_ACT_NMI 0x00000001 /* NMI on watchdog */
-+#define WDT_CTRL_ACT_RESET 0x00000002 /* reset on watchdog */
-+
-+static int wdt_timeout = 20;
-+static int started;
-+static int in_use;
-+static void __iomem *wdt_base;
-+
-+static inline void ar2315_wdt_wr(unsigned reg, u32 val)
-+{
-+ iowrite32(val, wdt_base + reg);
-+}
-+
-+static void
-+ar2315_wdt_enable(void)
-+{
-+ ar2315_wdt_wr(WDT_REG_TIMER, wdt_timeout * CLOCK_RATE);
-+}
-+
-+static ssize_t
-+ar2315_wdt_write(struct file *file, const char __user *data, size_t len,
-+ loff_t *ppos)
-+{
-+ if (len)
-+ ar2315_wdt_enable();
-+ return len;
-+}
-+
-+static int
-+ar2315_wdt_open(struct inode *inode, struct file *file)
-+{
-+ if (in_use)
-+ return -EBUSY;
-+ ar2315_wdt_enable();
-+ in_use = 1;
-+ started = 1;
-+ return nonseekable_open(inode, file);
-+}
-+
-+static int
-+ar2315_wdt_release(struct inode *inode, struct file *file)
-+{
-+ in_use = 0;
-+ return 0;
-+}
-+
-+static irqreturn_t
-+ar2315_wdt_interrupt(int irq, void *dev)
-+{
-+ struct platform_device *pdev = (struct platform_device *)dev;
-+
-+ if (started) {
-+ dev_crit(&pdev->dev, "watchdog expired, rebooting system\n");
-+ emergency_restart();
-+ } else {
-+ ar2315_wdt_wr(WDT_REG_CTRL, 0);
-+ ar2315_wdt_wr(WDT_REG_TIMER, 0);
-+ }
-+ return IRQ_HANDLED;
-+}
-+
-+static struct watchdog_info ident = {
-+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
-+ .identity = "ar2315 Watchdog",
-+};
-+
-+static long
-+ar2315_wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-+{
-+ int new_wdt_timeout;
-+ int ret = -ENOIOCTLCMD;
-+
-+ switch (cmd) {
-+ case WDIOC_GETSUPPORT:
-+ ret = copy_to_user((void __user *)arg, &ident, sizeof(ident)) ?
-+ -EFAULT : 0;
-+ break;
-+ case WDIOC_KEEPALIVE:
-+ ar2315_wdt_enable();
-+ ret = 0;
-+ break;
-+ case WDIOC_SETTIMEOUT:
-+ ret = get_user(new_wdt_timeout, (int __user *)arg);
-+ if (ret)
-+ break;
-+ wdt_timeout = HEARTBEAT(new_wdt_timeout);
-+ ar2315_wdt_enable();
-+ break;
-+ case WDIOC_GETTIMEOUT:
-+ ret = put_user(wdt_timeout, (int __user *)arg);
-+ break;
-+ }
-+ return ret;
-+}
-+
-+static const struct file_operations ar2315_wdt_fops = {
-+ .owner = THIS_MODULE,
-+ .llseek = no_llseek,
-+ .write = ar2315_wdt_write,
-+ .unlocked_ioctl = ar2315_wdt_ioctl,
-+ .open = ar2315_wdt_open,
-+ .release = ar2315_wdt_release,
-+};
-+
-+static struct miscdevice ar2315_wdt_miscdev = {
-+ .minor = WATCHDOG_MINOR,
-+ .name = "watchdog",
-+ .fops = &ar2315_wdt_fops,
-+};
-+
-+static int
-+ar2315_wdt_probe(struct platform_device *dev)
-+{
-+ struct resource *mem_res, *irq_res;
-+ int ret = 0;
-+
-+ if (wdt_base)
-+ return -EBUSY;
-+
-+ irq_res = platform_get_resource(dev, IORESOURCE_IRQ, 0);
-+ if (!irq_res) {
-+ dev_err(&dev->dev, "no IRQ resource\n");
-+ return -ENOENT;
-+ }
-+
-+ mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
-+ wdt_base = devm_ioremap_resource(&dev->dev, mem_res);
-+ if (IS_ERR(wdt_base))
-+ return PTR_ERR(wdt_base);
-+
-+ ret = devm_request_irq(&dev->dev, irq_res->start, ar2315_wdt_interrupt,
-+ IRQF_DISABLED, DRIVER_NAME, dev);
-+ if (ret) {
-+ dev_err(&dev->dev, "failed to register inetrrupt\n");
-+ goto out;
-+ }
-+
-+ ret = misc_register(&ar2315_wdt_miscdev);
-+ if (ret)
-+ dev_err(&dev->dev, "failed to register miscdev\n");
-+
-+out:
-+ return ret;
-+}
-+
-+static int
-+ar2315_wdt_remove(struct platform_device *dev)
-+{
-+ misc_deregister(&ar2315_wdt_miscdev);
-+ return 0;
-+}
-+
-+static struct platform_driver ar2315_wdt_driver = {
-+ .probe = ar2315_wdt_probe,
-+ .remove = ar2315_wdt_remove,
-+ .driver = {
-+ .name = DRIVER_NAME,
-+ .owner = THIS_MODULE,
-+ },
-+};
-+
-+module_platform_driver(ar2315_wdt_driver);
-+
-+MODULE_DESCRIPTION("Atheros AR2315 hardware watchdog driver");
-+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
-+MODULE_LICENSE("GPL");
-+MODULE_ALIAS("platform:" DRIVER_NAME);
---- a/drivers/watchdog/Kconfig
-+++ b/drivers/watchdog/Kconfig
-@@ -1202,6 +1202,13 @@ config RALINK_WDT
- help
- Hardware driver for the Ralink SoC Watchdog Timer.
-
-+config AR2315_WDT
-+ tristate "Atheros AR2315+ WiSoCs Watchdog Timer"
-+ depends on ATHEROS_AR231X
-+ help
-+ Hardware driver for the built-in watchdog timer on the Atheros
-+ AR2315/AR2316 WiSoCs.
-+
- # PARISC Architecture
-
- # POWERPC Architecture
---- a/drivers/watchdog/Makefile
-+++ b/drivers/watchdog/Makefile
-@@ -134,6 +134,7 @@ obj-$(CONFIG_GPIO_WDT) += old_gpio_wdt.o
- obj-$(CONFIG_PNX833X_WDT) += pnx833x_wdt.o
- obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
- obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
-+obj-$(CONFIG_AR2315_WDT) += ar2315-wtd.o
- obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
- obj-$(CONFIG_OCTEON_WDT) += octeon-wdt.o
- octeon-wdt-y := octeon-wdt-main.o octeon-wdt-nmi.o
projects / openwrt / svn-archive / archive.git / blobdiff