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path: root/drivers/watchdog/mpc8xx_wdt.c
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Diffstat (limited to 'drivers/watchdog/mpc8xx_wdt.c')
-rw-r--r--drivers/watchdog/mpc8xx_wdt.c170
1 files changed, 0 insertions, 170 deletions
diff --git a/drivers/watchdog/mpc8xx_wdt.c b/drivers/watchdog/mpc8xx_wdt.c
deleted file mode 100644
index 1336425acf20..000000000000
--- a/drivers/watchdog/mpc8xx_wdt.c
+++ /dev/null
@@ -1,170 +0,0 @@
1/*
2 * mpc8xx_wdt.c - MPC8xx watchdog userspace interface
3 *
4 * Author: Florian Schirmer <jolt@tuxbox.org>
5 *
6 * 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
9 * or implied.
10 */
11
12#include <linux/fs.h>
13#include <linux/init.h>
14#include <linux/kernel.h>
15#include <linux/miscdevice.h>
16#include <linux/module.h>
17#include <linux/watchdog.h>
18#include <asm/8xx_immap.h>
19#include <linux/uaccess.h>
20#include <linux/io.h>
21#include <syslib/m8xx_wdt.h>
22
23static unsigned long wdt_opened;
24static int wdt_status;
25static spinlock_t wdt_lock;
26
27static void mpc8xx_wdt_handler_disable(void)
28{
29 volatile uint __iomem *piscr;
30 piscr = (uint *)&((immap_t *)IMAP_ADDR)->im_sit.sit_piscr;
31
32 if (!m8xx_has_internal_rtc)
33 m8xx_wdt_stop_timer();
34 else
35 out_be32(piscr, in_be32(piscr) & ~(PISCR_PIE | PISCR_PTE));
36 printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler deactivated\n");
37}
38
39static void mpc8xx_wdt_handler_enable(void)
40{
41 volatile uint __iomem *piscr;
42 piscr = (uint *)&((immap_t *)IMAP_ADDR)->im_sit.sit_piscr;
43
44 if (!m8xx_has_internal_rtc)
45 m8xx_wdt_install_timer();
46 else
47 out_be32(piscr, in_be32(piscr) | PISCR_PIE | PISCR_PTE);
48 printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler activated\n");
49}
50
51static int mpc8xx_wdt_open(struct inode *inode, struct file *file)
52{
53 if (test_and_set_bit(0, &wdt_opened))
54 return -EBUSY;
55 m8xx_wdt_reset();
56 mpc8xx_wdt_handler_disable();
57 return nonseekable_open(inode, file);
58}
59
60static int mpc8xx_wdt_release(struct inode *inode, struct file *file)
61{
62 m8xx_wdt_reset();
63#if !defined(CONFIG_WATCHDOG_NOWAYOUT)
64 mpc8xx_wdt_handler_enable();
65#endif
66 clear_bit(0, &wdt_opened);
67 return 0;
68}
69
70static ssize_t mpc8xx_wdt_write(struct file *file, const char *data,
71 size_t len, loff_t *ppos)
72{
73 if (len) {
74 spin_lock(&wdt_lock);
75 m8xx_wdt_reset();
76 spin_unlock(&wdt_lock);
77 }
78 return len;
79}
80
81static long mpc8xx_wdt_ioctl(struct file *file,
82 unsigned int cmd, unsigned long arg)
83{
84 int timeout;
85 static struct watchdog_info info = {
86 .options = WDIOF_KEEPALIVEPING,
87 .firmware_version = 0,
88 .identity = "MPC8xx watchdog",
89 };
90
91 switch (cmd) {
92 case WDIOC_GETSUPPORT:
93 if (copy_to_user((void *)arg, &info, sizeof(info)))
94 return -EFAULT;
95 break;
96
97 case WDIOC_GETSTATUS:
98 case WDIOC_GETBOOTSTATUS:
99 if (put_user(wdt_status, (int *)arg))
100 return -EFAULT;
101 wdt_status &= ~WDIOF_KEEPALIVEPING;
102 break;
103
104 case WDIOC_GETTEMP:
105 return -EOPNOTSUPP;
106
107 case WDIOC_SETOPTIONS:
108 return -EOPNOTSUPP;
109
110 case WDIOC_KEEPALIVE:
111 spin_lock(&wdt_lock);
112 m8xx_wdt_reset();
113 wdt_status |= WDIOF_KEEPALIVEPING;
114 spin_unlock(&wdt_lock);
115 break;
116
117 case WDIOC_SETTIMEOUT:
118 return -EOPNOTSUPP;
119
120 case WDIOC_GETTIMEOUT:
121 spin_lock(&wdt_lock);
122 timeout = m8xx_wdt_get_timeout();
123 spin_unlock(&wdt_lock);
124 if (put_user(timeout, (int *)arg))
125 return -EFAULT;
126 break;
127
128 default:
129 return -ENOTTY;
130 }
131
132 return 0;
133}
134
135static const struct file_operations mpc8xx_wdt_fops = {
136 .owner = THIS_MODULE,
137 .llseek = no_llseek,
138 .write = mpc8xx_wdt_write,
139 .unlocked_ioctl = mpc8xx_wdt_ioctl,
140 .open = mpc8xx_wdt_open,
141 .release = mpc8xx_wdt_release,
142};
143
144static struct miscdevice mpc8xx_wdt_miscdev = {
145 .minor = WATCHDOG_MINOR,
146 .name = "watchdog",
147 .fops = &mpc8xx_wdt_fops,
148};
149
150static int __init mpc8xx_wdt_init(void)
151{
152 spin_lock_init(&wdt_lock);
153 return misc_register(&mpc8xx_wdt_miscdev);
154}
155
156static void __exit mpc8xx_wdt_exit(void)
157{
158 misc_deregister(&mpc8xx_wdt_miscdev);
159
160 m8xx_wdt_reset();
161 mpc8xx_wdt_handler_enable();
162}
163
164module_init(mpc8xx_wdt_init);
165module_exit(mpc8xx_wdt_exit);
166
167MODULE_AUTHOR("Florian Schirmer <jolt@tuxbox.org>");
168MODULE_DESCRIPTION("MPC8xx watchdog driver");
169MODULE_LICENSE("GPL");
170MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-20 22:48:08 -0400