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authorWim Van Sebroeck <wim@iguana.be>2007-08-17 04:38:02 -0400
committerWim Van Sebroeck <wim@iguana.be>2007-10-18 06:39:03 -0400
commitb7e04f8c61a46d742de23af5d7ca2b41b33e40ac (patch)
treec52a7ea568648e2d8ed0d423098b42298de2058b /drivers/char/watchdog/mixcomwd.c
parentd85714d81cc0408daddb68c10f7fd69eafe7c213 (diff)
mv watchdog tree under drivers
move watchdog tree from drivers/char/watchdog to drivers/watchdog. Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/char/watchdog/mixcomwd.c')
-rw-r--r--drivers/char/watchdog/mixcomwd.c330
1 files changed, 0 insertions, 330 deletions
diff --git a/drivers/char/watchdog/mixcomwd.c b/drivers/char/watchdog/mixcomwd.c
deleted file mode 100644
index 1adf1d56027d..000000000000
--- a/drivers/char/watchdog/mixcomwd.c
+++ /dev/null
@@ -1,330 +0,0 @@
1/*
2 * MixCom Watchdog: A Simple Hardware Watchdog Device
3 * Based on Softdog driver by Alan Cox and PC Watchdog driver by Ken Hollis
4 *
5 * Author: Gergely Madarasz <gorgo@itc.hu>
6 *
7 * Copyright (c) 1999 ITConsult-Pro Co. <info@itc.hu>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 *
14 * Version 0.1 (99/04/15):
15 * - first version
16 *
17 * Version 0.2 (99/06/16):
18 * - added kernel timer watchdog ping after close
19 * since the hardware does not support watchdog shutdown
20 *
21 * Version 0.3 (99/06/21):
22 * - added WDIOC_GETSTATUS and WDIOC_GETSUPPORT ioctl calls
23 *
24 * Version 0.3.1 (99/06/22):
25 * - allow module removal while internal timer is active,
26 * print warning about probable reset
27 *
28 * Version 0.4 (99/11/15):
29 * - support for one more type board
30 *
31 * Version 0.5 (2001/12/14) Matt Domsch <Matt_Domsch@dell.com>
32 * - added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
33 *
34 * Version 0.6 (2002/04/12): Rob Radez <rob@osinvestor.com>
35 * - make mixcomwd_opened unsigned,
36 * removed lock_kernel/unlock_kernel from mixcomwd_release,
37 * modified ioctl a bit to conform to API
38 *
39 */
40
41#define VERSION "0.6"
42#define WATCHDOG_NAME "mixcomwd"
43#define PFX WATCHDOG_NAME ": "
44
45#include <linux/module.h>
46#include <linux/moduleparam.h>
47#include <linux/types.h>
48#include <linux/miscdevice.h>
49#include <linux/ioport.h>
50#include <linux/watchdog.h>
51#include <linux/fs.h>
52#include <linux/reboot.h>
53#include <linux/init.h>
54#include <linux/jiffies.h>
55#include <linux/timer.h>
56#include <asm/uaccess.h>
57#include <asm/io.h>
58
59/*
60 * We have two types of cards that can be probed:
61 * 1) The Mixcom cards: these cards can be found at addresses
62 * 0x180, 0x280, 0x380 with an additional offset of 0xc10.
63 * (Or 0xd90, 0xe90, 0xf90).
64 * 2) The FlashCOM cards: these cards can be set up at
65 * 0x300 -> 0x378, in 0x8 jumps with an offset of 0x04.
66 * (Or 0x304 -> 0x37c in 0x8 jumps).
67 * Each card has it's own ID.
68 */
69#define MIXCOM_ID 0x11
70#define FLASHCOM_ID 0x18
71static struct {
72 int ioport;
73 int id;
74} mixcomwd_io_info[] __devinitdata = {
75 /* The Mixcom cards */
76 {0x0d90, MIXCOM_ID},
77 {0x0e90, MIXCOM_ID},
78 {0x0f90, MIXCOM_ID},
79 /* The FlashCOM cards */
80 {0x0304, FLASHCOM_ID},
81 {0x030c, FLASHCOM_ID},
82 {0x0314, FLASHCOM_ID},
83 {0x031c, FLASHCOM_ID},
84 {0x0324, FLASHCOM_ID},
85 {0x032c, FLASHCOM_ID},
86 {0x0334, FLASHCOM_ID},
87 {0x033c, FLASHCOM_ID},
88 {0x0344, FLASHCOM_ID},
89 {0x034c, FLASHCOM_ID},
90 {0x0354, FLASHCOM_ID},
91 {0x035c, FLASHCOM_ID},
92 {0x0364, FLASHCOM_ID},
93 {0x036c, FLASHCOM_ID},
94 {0x0374, FLASHCOM_ID},
95 {0x037c, FLASHCOM_ID},
96 /* The end of the list */
97 {0x0000, 0},
98};
99
100static void mixcomwd_timerfun(unsigned long d);
101
102static unsigned long mixcomwd_opened; /* long req'd for setbit --RR */
103
104static int watchdog_port;
105static int mixcomwd_timer_alive;
106static DEFINE_TIMER(mixcomwd_timer, mixcomwd_timerfun, 0, 0);
107static char expect_close;
108
109static int nowayout = WATCHDOG_NOWAYOUT;
110module_param(nowayout, int, 0);
111MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
112
113static void mixcomwd_ping(void)
114{
115 outb_p(55,watchdog_port);
116 return;
117}
118
119static void mixcomwd_timerfun(unsigned long d)
120{
121 mixcomwd_ping();
122
123 mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
124}
125
126/*
127 * Allow only one person to hold it open
128 */
129
130static int mixcomwd_open(struct inode *inode, struct file *file)
131{
132 if(test_and_set_bit(0,&mixcomwd_opened)) {
133 return -EBUSY;
134 }
135 mixcomwd_ping();
136
137 if (nowayout) {
138 /*
139 * fops_get() code via open() has already done
140 * a try_module_get() so it is safe to do the
141 * __module_get().
142 */
143 __module_get(THIS_MODULE);
144 } else {
145 if(mixcomwd_timer_alive) {
146 del_timer(&mixcomwd_timer);
147 mixcomwd_timer_alive=0;
148 }
149 }
150 return nonseekable_open(inode, file);
151}
152
153static int mixcomwd_release(struct inode *inode, struct file *file)
154{
155 if (expect_close == 42) {
156 if(mixcomwd_timer_alive) {
157 printk(KERN_ERR PFX "release called while internal timer alive");
158 return -EBUSY;
159 }
160 mixcomwd_timer_alive=1;
161 mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
162 } else {
163 printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
164 }
165
166 clear_bit(0,&mixcomwd_opened);
167 expect_close=0;
168 return 0;
169}
170
171
172static ssize_t mixcomwd_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
173{
174 if(len)
175 {
176 if (!nowayout) {
177 size_t i;
178
179 /* In case it was set long ago */
180 expect_close = 0;
181
182 for (i = 0; i != len; i++) {
183 char c;
184 if (get_user(c, data + i))
185 return -EFAULT;
186 if (c == 'V')
187 expect_close = 42;
188 }
189 }
190 mixcomwd_ping();
191 }
192 return len;
193}
194
195static int mixcomwd_ioctl(struct inode *inode, struct file *file,
196 unsigned int cmd, unsigned long arg)
197{
198 void __user *argp = (void __user *)arg;
199 int __user *p = argp;
200 int status;
201 static struct watchdog_info ident = {
202 .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
203 .firmware_version = 1,
204 .identity = "MixCOM watchdog",
205 };
206
207 switch(cmd)
208 {
209 case WDIOC_GETSTATUS:
210 status=mixcomwd_opened;
211 if (!nowayout) {
212 status|=mixcomwd_timer_alive;
213 }
214 if (copy_to_user(p, &status, sizeof(int))) {
215 return -EFAULT;
216 }
217 break;
218 case WDIOC_GETBOOTSTATUS:
219 if (copy_to_user(p, &status, sizeof(int))) {
220 return -EFAULT;
221 }
222 break;
223 case WDIOC_GETSUPPORT:
224 if (copy_to_user(argp, &ident, sizeof(ident))) {
225 return -EFAULT;
226 }
227 break;
228 case WDIOC_KEEPALIVE:
229 mixcomwd_ping();
230 break;
231 default:
232 return -ENOTTY;
233 }
234 return 0;
235}
236
237static const struct file_operations mixcomwd_fops = {
238 .owner = THIS_MODULE,
239 .llseek = no_llseek,
240 .write = mixcomwd_write,
241 .ioctl = mixcomwd_ioctl,
242 .open = mixcomwd_open,
243 .release = mixcomwd_release,
244};
245
246static struct miscdevice mixcomwd_miscdev = {
247 .minor = WATCHDOG_MINOR,
248 .name = "watchdog",
249 .fops = &mixcomwd_fops,
250};
251
252static int __init checkcard(int port, int card_id)
253{
254 int id;
255
256 if (!request_region(port, 1, "MixCOM watchdog")) {
257 return 0;
258 }
259
260 id=inb_p(port);
261 if (card_id==MIXCOM_ID)
262 id &= 0x3f;
263
264 if (id!=card_id) {
265 release_region(port, 1);
266 return 0;
267 }
268 return 1;
269}
270
271static int __init mixcomwd_init(void)
272{
273 int i;
274 int ret;
275 int found=0;
276
277 for (i = 0; !found && mixcomwd_io_info[i].ioport != 0; i++) {
278 if (checkcard(mixcomwd_io_info[i].ioport,
279 mixcomwd_io_info[i].id)) {
280 found = 1;
281 watchdog_port = mixcomwd_io_info[i].ioport;
282 }
283 }
284
285 if (!found) {
286 printk(KERN_ERR PFX "No card detected, or port not available.\n");
287 return -ENODEV;
288 }
289
290 ret = misc_register(&mixcomwd_miscdev);
291 if (ret)
292 {
293 printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
294 WATCHDOG_MINOR, ret);
295 goto error_misc_register_watchdog;
296 }
297
298 printk(KERN_INFO "MixCOM watchdog driver v%s, watchdog port at 0x%3x\n",
299 VERSION, watchdog_port);
300
301 return 0;
302
303error_misc_register_watchdog:
304 release_region(watchdog_port, 1);
305 watchdog_port = 0x0000;
306 return ret;
307}
308
309static void __exit mixcomwd_exit(void)
310{
311 if (!nowayout) {
312 if(mixcomwd_timer_alive) {
313 printk(KERN_WARNING PFX "I quit now, hardware will"
314 " probably reboot!\n");
315 del_timer_sync(&mixcomwd_timer);
316 mixcomwd_timer_alive=0;
317 }
318 }
319 misc_deregister(&mixcomwd_miscdev);
320 release_region(watchdog_port,1);
321}
322
323module_init(mixcomwd_init);
324module_exit(mixcomwd_exit);
325
326MODULE_AUTHOR("Gergely Madarasz <gorgo@itc.hu>");
327MODULE_DESCRIPTION("MixCom Watchdog driver");
328MODULE_VERSION(VERSION);
329MODULE_LICENSE("GPL");
330MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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