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Diffstat (limited to 'target/linux/ramips/files/drivers/watchdog')
-rw-r--r--target/linux/ramips/files/drivers/watchdog/ramips_wdt.c355
1 files changed, 0 insertions, 355 deletions
diff --git a/target/linux/ramips/files/drivers/watchdog/ramips_wdt.c b/target/linux/ramips/files/drivers/watchdog/ramips_wdt.c
deleted file mode 100644
index fa7e9e85ef..0000000000
--- a/target/linux/ramips/files/drivers/watchdog/ramips_wdt.c
+++ /dev/null
@@ -1,355 +0,0 @@
-/*
- * Ralink RT288X/RT305X built-in hardware watchdog timer
- *
- * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
- *
- * This driver was based on: drivers/watchdog/ixp4xx_wdt.c
- * Author: Deepak Saxena <dsaxena@plexity.net>
- * Copyright 2004 (c) MontaVista, Software, Inc.
- *
- * which again was based on sa1100 driver,
- * Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
- *
- * parts of the driver are based on Ralink's 2.6.21 BSP
- *
- * This program 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.
- */
-
-#include <linux/bitops.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-
-#define DRIVER_NAME "ramips-wdt"
-
-#define RAMIPS_WDT_TIMEOUT 0 /* seconds */
-#define RAMIPS_WDT_PRESCALE 65536
-
-#define TIMER_REG_TMRSTAT 0x00
-#define TIMER_REG_TMR1LOAD 0x20
-#define TIMER_REG_TMR1CTL 0x28
-
-#define TMRSTAT_TMR1RST BIT(5)
-
-#define TMR1CTL_ENABLE BIT(7)
-#define TMR1CTL_MODE_SHIFT 4
-#define TMR1CTL_MODE_MASK 0x3
-#define TMR1CTL_MODE_FREE_RUNNING 0x0
-#define TMR1CTL_MODE_PERIODIC 0x1
-#define TMR1CTL_MODE_TIMEOUT 0x2
-#define TMR1CTL_MODE_WDT 0x3
-#define TMR1CTL_PRESCALE_MASK 0xf
-#define TMR1CTL_PRESCALE_65536 0xf
-
-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) ")");
-
-static int ramips_wdt_timeout = RAMIPS_WDT_TIMEOUT;
-module_param_named(timeout, ramips_wdt_timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds, 0 means use maximum "
- "(default=" __MODULE_STRING(RAMIPS_WDT_TIMEOUT) "s)");
-
-static unsigned long ramips_wdt_flags;
-
-#define WDT_FLAGS_BUSY 0
-#define WDT_FLAGS_EXPECT_CLOSE 1
-
-static struct clk *ramips_wdt_clk;
-static unsigned long ramips_wdt_freq;
-static int ramips_wdt_max_timeout;
-static void __iomem *ramips_wdt_base;
-
-static inline void ramips_wdt_wr(unsigned reg, u32 val)
-{
- __raw_writel(val, ramips_wdt_base + reg);
-}
-
-static inline u32 ramips_wdt_rr(unsigned reg)
-{
- return __raw_readl(ramips_wdt_base + reg);
-}
-
-static inline void ramips_wdt_keepalive(void)
-{
- ramips_wdt_wr(TIMER_REG_TMR1LOAD, ramips_wdt_timeout * ramips_wdt_freq);
-}
-
-static inline void ramips_wdt_enable(void)
-{
- u32 t;
-
- ramips_wdt_keepalive();
-
- t = ramips_wdt_rr(TIMER_REG_TMR1CTL);
- t |= TMR1CTL_ENABLE;
- ramips_wdt_wr(TIMER_REG_TMR1CTL, t);
-}
-
-static inline void ramips_wdt_disable(void)
-{
- u32 t;
-
- ramips_wdt_keepalive();
-
- t = ramips_wdt_rr(TIMER_REG_TMR1CTL);
- t &= ~TMR1CTL_ENABLE;
- ramips_wdt_wr(TIMER_REG_TMR1CTL, t);
-}
-
-static int ramips_wdt_set_timeout(int val)
-{
- if (val < 1 || val > ramips_wdt_max_timeout) {
- pr_warn(DRIVER_NAME
- ": timeout value %d must be 0 < timeout <= %d, using %d\n",
- val, ramips_wdt_max_timeout, ramips_wdt_timeout);
- return -EINVAL;
- }
-
- ramips_wdt_timeout = val;
- ramips_wdt_keepalive();
-
- return 0;
-}
-
-static int ramips_wdt_open(struct inode *inode, struct file *file)
-{
- u32 t;
-
- if (test_and_set_bit(WDT_FLAGS_BUSY, &ramips_wdt_flags))
- return -EBUSY;
-
- clear_bit(WDT_FLAGS_EXPECT_CLOSE, &ramips_wdt_flags);
-
- t = ramips_wdt_rr(TIMER_REG_TMR1CTL);
- t &= ~(TMR1CTL_MODE_MASK << TMR1CTL_MODE_SHIFT |
- TMR1CTL_PRESCALE_MASK);
- t |= (TMR1CTL_MODE_WDT << TMR1CTL_MODE_SHIFT |
- TMR1CTL_PRESCALE_65536);
- ramips_wdt_wr(TIMER_REG_TMR1CTL, t);
-
- ramips_wdt_enable();
-
- return nonseekable_open(inode, file);
-}
-
-static int ramips_wdt_release(struct inode *inode, struct file *file)
-{
- if (test_bit(WDT_FLAGS_EXPECT_CLOSE, &ramips_wdt_flags))
- ramips_wdt_disable();
- else {
- pr_crit(DRIVER_NAME ": device closed unexpectedly, "
- "watchdog timer will not stop!\n");
- ramips_wdt_keepalive();
- }
-
- clear_bit(WDT_FLAGS_BUSY, &ramips_wdt_flags);
- clear_bit(WDT_FLAGS_EXPECT_CLOSE, &ramips_wdt_flags);
-
- return 0;
-}
-
-static ssize_t ramips_wdt_write(struct file *file, const char *data,
- size_t len, loff_t *ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- clear_bit(WDT_FLAGS_EXPECT_CLOSE, &ramips_wdt_flags);
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
-
- if (c == 'V')
- set_bit(WDT_FLAGS_EXPECT_CLOSE,
- &ramips_wdt_flags);
- }
- }
-
- ramips_wdt_keepalive();
- }
-
- return len;
-}
-
-static const struct watchdog_info ramips_wdt_info = {
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = "RAMIPS watchdog",
-};
-
-static long ramips_wdt_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int err;
- int t;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- err = copy_to_user(argp, &ramips_wdt_info,
- sizeof(ramips_wdt_info)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- err = put_user(0, p);
- break;
-
- case WDIOC_KEEPALIVE:
- ramips_wdt_keepalive();
- err = 0;
- break;
-
- case WDIOC_SETTIMEOUT:
- err = get_user(t, p);
- if (err)
- break;
-
- err = ramips_wdt_set_timeout(t);
- if (err)
- break;
-
- /* fallthrough */
- case WDIOC_GETTIMEOUT:
- err = put_user(ramips_wdt_timeout, p);
- break;
-
- default:
- err = -ENOTTY;
- break;
- }
-
- return err;
-}
-
-static const struct file_operations ramips_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = ramips_wdt_write,
- .unlocked_ioctl = ramips_wdt_ioctl,
- .open = ramips_wdt_open,
- .release = ramips_wdt_release,
-};
-
-static struct miscdevice ramips_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &ramips_wdt_fops,
-};
-
-static int ramips_wdt_probe(struct platform_device *pdev)
-{
- struct resource *res;
- int err;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no memory resource found\n");
- return -EINVAL;
- }
-
- ramips_wdt_base = ioremap(res->start, resource_size(res));
- if (!ramips_wdt_base)
- return -ENOMEM;
-
- ramips_wdt_clk = clk_get(&pdev->dev, "wdt");
- if (IS_ERR(ramips_wdt_clk)) {
- err = PTR_ERR(ramips_wdt_clk);
- goto err_unmap;
- }
-
- err = clk_enable(ramips_wdt_clk);
- if (err)
- goto err_clk_put;
-
- ramips_wdt_freq = clk_get_rate(ramips_wdt_clk) / RAMIPS_WDT_PRESCALE;
- if (!ramips_wdt_freq) {
- err = -EINVAL;
- goto err_clk_disable;
- }
-
- ramips_wdt_max_timeout = (0xfffful / ramips_wdt_freq);
- if (ramips_wdt_timeout < 1 ||
- ramips_wdt_timeout > ramips_wdt_max_timeout) {
- ramips_wdt_timeout = ramips_wdt_max_timeout;
- dev_info(&pdev->dev,
- "timeout value must be 0 < timeout <= %d, using %d\n",
- ramips_wdt_max_timeout, ramips_wdt_timeout);
- }
-
- err = misc_register(&ramips_wdt_miscdev);
- if (err) {
- dev_err(&pdev->dev,
- "unable to register misc device, err=%d\n", err);
- goto err_clk_disable;
- }
-
- return 0;
-
-err_clk_disable:
- clk_disable(ramips_wdt_clk);
-err_clk_put:
- clk_put(ramips_wdt_clk);
-err_unmap:
- iounmap(ramips_wdt_base);
- return err;
-}
-
-static int ramips_wdt_remove(struct platform_device *pdev)
-{
- misc_deregister(&ramips_wdt_miscdev);
- clk_disable(ramips_wdt_clk);
- clk_put(ramips_wdt_clk);
- iounmap(ramips_wdt_base);
- return 0;
-}
-
-static void ramips_wdt_shutdown(struct platform_device *pdev)
-{
- ramips_wdt_disable();
-}
-
-static struct platform_driver ramips_wdt_driver = {
- .remove = ramips_wdt_remove,
- .shutdown = ramips_wdt_shutdown,
- .driver = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init ramips_wdt_init(void)
-{
- return platform_driver_probe(&ramips_wdt_driver, ramips_wdt_probe);
-}
-module_init(ramips_wdt_init);
-
-static void __exit ramips_wdt_exit(void)
-{
- platform_driver_unregister(&ramips_wdt_driver);
-}
-module_exit(ramips_wdt_exit);
-
-MODULE_DESCRIPTION("Ralink RT288X/RT305X hardware watchdog driver");
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRIVER_NAME);
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 09:50:50 +0000