diff options
Diffstat (limited to 'target/linux/ath25/patches-4.4/130-watchdog.patch')
| -rw-r--r-- | target/linux/ath25/patches-4.4/130-watchdog.patch | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/target/linux/ath25/patches-4.4/130-watchdog.patch b/target/linux/ath25/patches-4.4/130-watchdog.patch new file mode 100644 index 0000000000..251768f735 --- /dev/null +++ b/target/linux/ath25/patches-4.4/130-watchdog.patch @@ -0,0 +1,277 @@ +--- /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; |