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Diffstat (limited to 'drivers/sbus/char/riowatchdog.c')
-rw-r--r--drivers/sbus/char/riowatchdog.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/drivers/sbus/char/riowatchdog.c b/drivers/sbus/char/riowatchdog.c
deleted file mode 100644
index b53af832a3af..000000000000
--- a/drivers/sbus/char/riowatchdog.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/* riowatchdog.c - driver for hw watchdog inside Super I/O of RIO
- *
- * Copyright (C) 2001, 2008 David S. Miller (davem@davemloft.net)
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/fs.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/miscdevice.h>
-#include <linux/smp_lock.h>
-#include <linux/watchdog.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-
-/* RIO uses the NatSemi Super I/O power management logical device
- * as its' watchdog.
- *
- * When the watchdog triggers, it asserts a line to the BBC (Boot Bus
- * Controller) of the machine. The BBC can only be configured to
- * trigger a power-on reset when the signal is asserted. The BBC
- * can be configured to ignore the signal entirely as well.
- *
- * The only Super I/O device register we care about is at index
- * 0x05 (WDTO_INDEX) which is the watchdog time-out in minutes (1-255).
- * If set to zero, this disables the watchdog. When set, the system
- * must periodically (before watchdog expires) clear (set to zero) and
- * re-set the watchdog else it will trigger.
- *
- * There are two other indexed watchdog registers inside this Super I/O
- * logical device, but they are unused. The first, at index 0x06 is
- * the watchdog control and can be used to make the watchdog timer re-set
- * when the PS/2 mouse or serial lines show activity. The second, at
- * index 0x07 is merely a sampling of the line from the watchdog to the
- * BBC.
- *
- * The watchdog device generates no interrupts.
- */
-
-MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
-MODULE_DESCRIPTION("Hardware watchdog driver for Sun RIO");
-MODULE_SUPPORTED_DEVICE("watchdog");
-MODULE_LICENSE("GPL");
-
-#define RIOWD_NAME "pmc"
-#define PFX RIOWD_NAME ": "
-
-struct riowd {
- void __iomem *regs;
- spinlock_t lock;
-};
-
-static struct riowd *riowd_device;
-
-#define WDTO_INDEX 0x05
-
-static int riowd_timeout = 1; /* in minutes */
-module_param(riowd_timeout, int, 0);
-MODULE_PARM_DESC(riowd_timeout, "Watchdog timeout in minutes");
-
-static void riowd_writereg(struct riowd *p, u8 val, int index)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&p->lock, flags);
- writeb(index, p->regs + 0);
- writeb(val, p->regs + 1);
- spin_unlock_irqrestore(&p->lock, flags);
-}
-
-static int riowd_open(struct inode *inode, struct file *filp)
-{
- cycle_kernel_lock();
- nonseekable_open(inode, filp);
- return 0;
-}
-
-static int riowd_release(struct inode *inode, struct file *filp)
-{
- return 0;
-}
-
-static int riowd_ioctl(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- static struct watchdog_info info = {
- .options = WDIOF_SETTIMEOUT,
- .firmware_version = 1,
- .identity = "riowd",
- };
- void __user *argp = (void __user *)arg;
- struct riowd *p = riowd_device;
- unsigned int options;
- int new_margin;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &info, sizeof(info)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- if (put_user(0, (int __user *)argp))
- return -EFAULT;
- break;
-
- case WDIOC_KEEPALIVE:
- riowd_writereg(p, riowd_timeout, WDTO_INDEX);
- break;
-
- case WDIOC_SETOPTIONS:
- if (copy_from_user(&options, argp, sizeof(options)))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD)
- riowd_writereg(p, 0, WDTO_INDEX);
- else if (options & WDIOS_ENABLECARD)
- riowd_writereg(p, riowd_timeout, WDTO_INDEX);
- else
- return -EINVAL;
-
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, (int __user *)argp))
- return -EFAULT;
- if ((new_margin < 60) || (new_margin > (255 * 60)))
- return -EINVAL;
- riowd_timeout = (new_margin + 59) / 60;
- riowd_writereg(p, riowd_timeout, WDTO_INDEX);
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(riowd_timeout * 60, (int __user *)argp);
-
- default:
- return -EINVAL;
- };
-
- return 0;
-}
-
-static ssize_t riowd_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- struct riowd *p = riowd_device;
-
- if (count) {
- riowd_writereg(p, riowd_timeout, WDTO_INDEX);
- return 1;
- }
-
- return 0;
-}
-
-static const struct file_operations riowd_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .ioctl = riowd_ioctl,
- .open = riowd_open,
- .write = riowd_write,
- .release = riowd_release,
-};
-
-static struct miscdevice riowd_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &riowd_fops
-};
-
-static int __devinit riowd_probe(struct of_device *op,
- const struct of_device_id *match)
-{
- struct riowd *p;
- int err = -EINVAL;
-
- if (riowd_device)
- goto out;
-
- err = -ENOMEM;
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- goto out;
-
- spin_lock_init(&p->lock);
-
- p->regs = of_ioremap(&op->resource[0], 0, 2, "riowd");
- if (!p->regs) {
- printk(KERN_ERR PFX "Cannot map registers.\n");
- goto out_free;
- }
-
- err = misc_register(&riowd_miscdev);
- if (err) {
- printk(KERN_ERR PFX "Cannot register watchdog misc device.\n");
- goto out_iounmap;
- }
-
- printk(KERN_INFO PFX "Hardware watchdog [%i minutes], "
- "regs at %p\n", riowd_timeout, p->regs);
-
- dev_set_drvdata(&op->dev, p);
- riowd_device = p;
- err = 0;
-
-out_iounmap:
- of_iounmap(&op->resource[0], p->regs, 2);
-
-out_free:
- kfree(p);
-
-out:
- return err;
-}
-
-static int __devexit riowd_remove(struct of_device *op)
-{
- struct riowd *p = dev_get_drvdata(&op->dev);
-
- misc_deregister(&riowd_miscdev);
- of_iounmap(&op->resource[0], p->regs, 2);
- kfree(p);
-
- return 0;
-}
-
-static struct of_device_id riowd_match[] = {
- {
- .name = "pmc",
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, riowd_match);
-
-static struct of_platform_driver riowd_driver = {
- .name = "riowd",
- .match_table = riowd_match,
- .probe = riowd_probe,
- .remove = __devexit_p(riowd_remove),
-};
-
-static int __init riowd_init(void)
-{
- return of_register_driver(&riowd_driver, &of_bus_type);
-}
-
-static void __exit riowd_exit(void)
-{
- of_unregister_driver(&riowd_driver);
-}
-
-module_init(riowd_init);
-module_exit(riowd_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 18:11:05 +0100