mirror of https://github.com/hak5/openwrt.git
278 lines
7.0 KiB
Diff
278 lines
7.0 KiB
Diff
--- /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,
|
|
+ 0, 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
|
|
@@ -1345,6 +1345,13 @@ config RALINK_WDT
|
|
help
|
|
Hardware driver for the Ralink SoC Watchdog Timer.
|
|
|
|
+config AR2315_WDT
|
|
+ tristate "Atheros AR2315+ WiSoCs Watchdog Timer"
|
|
+ depends on ATH25
|
|
+ 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
|
|
@@ -143,6 +143,7 @@ obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
|
|
obj-$(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
|
|
--- a/arch/mips/ath25/ar2315.c
|
|
+++ b/arch/mips/ath25/ar2315.c
|
|
@@ -220,6 +220,24 @@ static struct platform_device ar2315_gpi
|
|
.num_resources = ARRAY_SIZE(ar2315_gpio_res)
|
|
};
|
|
|
|
+static struct resource ar2315_wdt_res[] = {
|
|
+ {
|
|
+ .flags = IORESOURCE_MEM,
|
|
+ .start = AR2315_RST_BASE + AR2315_WDT_TIMER,
|
|
+ .end = AR2315_RST_BASE + AR2315_WDT_TIMER + 8 - 1,
|
|
+ },
|
|
+ {
|
|
+ .flags = IORESOURCE_IRQ,
|
|
+ }
|
|
+};
|
|
+
|
|
+static struct platform_device ar2315_wdt = {
|
|
+ .id = 0,
|
|
+ .name = "ar2315-wdt",
|
|
+ .resource = ar2315_wdt_res,
|
|
+ .num_resources = ARRAY_SIZE(ar2315_wdt_res)
|
|
+};
|
|
+
|
|
static struct resource ar2315_spiflash_res[] = {
|
|
{
|
|
.name = "spiflash_read",
|
|
@@ -252,6 +270,11 @@ void __init ar2315_init_devices(void)
|
|
ar2315_gpio_res[1].end = ar2315_gpio_res[1].start;
|
|
platform_device_register(&ar2315_gpio);
|
|
|
|
+ ar2315_wdt_res[1].start = irq_create_mapping(ar2315_misc_irq_domain,
|
|
+ AR2315_MISC_IRQ_WATCHDOG);
|
|
+ ar2315_wdt_res[1].end = ar2315_wdt_res[1].start;
|
|
+ platform_device_register(&ar2315_wdt);
|
|
+
|
|
platform_device_register(&ar2315_spiflash);
|
|
|
|
ar2315_eth_data.macaddr = ath25_board.config->enet0_mac;
|