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authorAlan Cox <alan@redhat.com>2008-05-19 09:05:19 -0400
committerWim Van Sebroeck <wim@iguana.be>2008-05-27 11:26:44 -0400
commit2760600da2a13d5a2a335ba012d0f3ad5df4c098 (patch)
tree2ac7f7df2e5c498683c50986f2d3580e9014d10e /drivers/watchdog/at91rm9200_wdt.c
parenta6be8e5ff95e12190fd5e5158eb553255677292f (diff)
[WATCHDOG 06/57] at91: watchdog to unlocked_ioctl
Review and switch to unlocked_ioctl Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/at91rm9200_wdt.c')
-rw-r--r--drivers/watchdog/at91rm9200_wdt.c108
1 files changed, 54 insertions, 54 deletions
diff --git a/drivers/watchdog/at91rm9200_wdt.c b/drivers/watchdog/at91rm9200_wdt.c
index 9ff9a9565320..bb79f649dc7e 100644
--- a/drivers/watchdog/at91rm9200_wdt.c
+++ b/drivers/watchdog/at91rm9200_wdt.c
@@ -20,7 +20,7 @@
20#include <linux/platform_device.h> 20#include <linux/platform_device.h>
21#include <linux/types.h> 21#include <linux/types.h>
22#include <linux/watchdog.h> 22#include <linux/watchdog.h>
23#include <asm/uaccess.h> 23#include <linux/uaccess.h>
24#include <asm/arch/at91_st.h> 24#include <asm/arch/at91_st.h>
25 25
26 26
@@ -31,11 +31,14 @@ static int wdt_time = WDT_DEFAULT_TIME;
31static int nowayout = WATCHDOG_NOWAYOUT; 31static int nowayout = WATCHDOG_NOWAYOUT;
32 32
33module_param(wdt_time, int, 0); 33module_param(wdt_time, int, 0);
34MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")"); 34MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="
35 __MODULE_STRING(WDT_DEFAULT_TIME) ")");
35 36
36#ifdef CONFIG_WATCHDOG_NOWAYOUT 37#ifdef CONFIG_WATCHDOG_NOWAYOUT
37module_param(nowayout, int, 0); 38module_param(nowayout, int, 0);
38MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); 39MODULE_PARM_DESC(nowayout,
40 "Watchdog cannot be stopped once started (default="
41 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
39#endif 42#endif
40 43
41 44
@@ -46,7 +49,7 @@ static unsigned long at91wdt_busy;
46/* 49/*
47 * Disable the watchdog. 50 * Disable the watchdog.
48 */ 51 */
49static void inline at91_wdt_stop(void) 52static inline void at91_wdt_stop(void)
50{ 53{
51 at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN); 54 at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN);
52} 55}
@@ -54,16 +57,17 @@ static void inline at91_wdt_stop(void)
54/* 57/*
55 * Enable and reset the watchdog. 58 * Enable and reset the watchdog.
56 */ 59 */
57static void inline at91_wdt_start(void) 60static inline void at91_wdt_start(void)
58{ 61{
59 at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN | AT91_ST_RSTEN | (((65536 * wdt_time) >> 8) & AT91_ST_WDV)); 62 at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN | AT91_ST_RSTEN |
63 (((65536 * wdt_time) >> 8) & AT91_ST_WDV));
60 at91_sys_write(AT91_ST_CR, AT91_ST_WDRST); 64 at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
61} 65}
62 66
63/* 67/*
64 * Reload the watchdog timer. (ie, pat the watchdog) 68 * Reload the watchdog timer. (ie, pat the watchdog)
65 */ 69 */
66static void inline at91_wdt_reload(void) 70static inline void at91_wdt_reload(void)
67{ 71{
68 at91_sys_write(AT91_ST_CR, AT91_ST_WDRST); 72 at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
69} 73}
@@ -89,8 +93,9 @@ static int at91_wdt_open(struct inode *inode, struct file *file)
89 */ 93 */
90static int at91_wdt_close(struct inode *inode, struct file *file) 94static int at91_wdt_close(struct inode *inode, struct file *file)
91{ 95{
96 /* Disable the watchdog when file is closed */
92 if (!nowayout) 97 if (!nowayout)
93 at91_wdt_stop(); /* Disable the watchdog when file is closed */ 98 at91_wdt_stop();
94 99
95 clear_bit(0, &at91wdt_busy); 100 clear_bit(0, &at91wdt_busy);
96 return 0; 101 return 0;
@@ -110,7 +115,8 @@ static int at91_wdt_settimeout(int new_time)
110 if ((new_time <= 0) || (new_time > WDT_MAX_TIME)) 115 if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
111 return -EINVAL; 116 return -EINVAL;
112 117
113 /* Set new watchdog time. It will be used when at91_wdt_start() is called. */ 118 /* Set new watchdog time. It will be used when
119 at91_wdt_start() is called. */
114 wdt_time = new_time; 120 wdt_time = new_time;
115 return 0; 121 return 0;
116} 122}
@@ -123,60 +129,52 @@ static struct watchdog_info at91_wdt_info = {
123/* 129/*
124 * Handle commands from user-space. 130 * Handle commands from user-space.
125 */ 131 */
126static int at91_wdt_ioctl(struct inode *inode, struct file *file, 132static long at91_wdt_ioct(struct file *file,
127 unsigned int cmd, unsigned long arg) 133 unsigned int cmd, unsigned long arg)
128{ 134{
129 void __user *argp = (void __user *)arg; 135 void __user *argp = (void __user *)arg;
130 int __user *p = argp; 136 int __user *p = argp;
131 int new_value; 137 int new_value;
132 138
133 switch(cmd) { 139 switch (cmd) {
134 case WDIOC_KEEPALIVE: 140 case WDIOC_KEEPALIVE:
135 at91_wdt_reload(); /* pat the watchdog */ 141 at91_wdt_reload(); /* pat the watchdog */
136 return 0; 142 return 0;
137 143 case WDIOC_GETSUPPORT:
138 case WDIOC_GETSUPPORT: 144 return copy_to_user(argp, &at91_wdt_info,
139 return copy_to_user(argp, &at91_wdt_info, sizeof(at91_wdt_info)) ? -EFAULT : 0; 145 sizeof(at91_wdt_info)) ? -EFAULT : 0;
140 146 case WDIOC_SETTIMEOUT:
141 case WDIOC_SETTIMEOUT: 147 if (get_user(new_value, p))
142 if (get_user(new_value, p)) 148 return -EFAULT;
143 return -EFAULT; 149 if (at91_wdt_settimeout(new_value))
144 150 return -EINVAL;
145 if (at91_wdt_settimeout(new_value)) 151 /* Enable new time value */
146 return -EINVAL; 152 at91_wdt_start();
147 153 /* Return current value */
148 /* Enable new time value */ 154 return put_user(wdt_time, p);
155 case WDIOC_GETTIMEOUT:
156 return put_user(wdt_time, p);
157 case WDIOC_GETSTATUS:
158 case WDIOC_GETBOOTSTATUS:
159 return put_user(0, p);
160 case WDIOC_SETOPTIONS:
161 if (get_user(new_value, p))
162 return -EFAULT;
163 if (new_value & WDIOS_DISABLECARD)
164 at91_wdt_stop();
165 if (new_value & WDIOS_ENABLECARD)
149 at91_wdt_start(); 166 at91_wdt_start();
150 167 return 0;
151 /* Return current value */ 168 default:
152 return put_user(wdt_time, p); 169 return -ENOTTY;
153
154 case WDIOC_GETTIMEOUT:
155 return put_user(wdt_time, p);
156
157 case WDIOC_GETSTATUS:
158 case WDIOC_GETBOOTSTATUS:
159 return put_user(0, p);
160
161 case WDIOC_SETOPTIONS:
162 if (get_user(new_value, p))
163 return -EFAULT;
164
165 if (new_value & WDIOS_DISABLECARD)
166 at91_wdt_stop();
167 if (new_value & WDIOS_ENABLECARD)
168 at91_wdt_start();
169 return 0;
170
171 default:
172 return -ENOTTY;
173 } 170 }
174} 171}
175 172
176/* 173/*
177 * Pat the watchdog whenever device is written to. 174 * Pat the watchdog whenever device is written to.
178 */ 175 */
179static ssize_t at91_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos) 176static ssize_t at91_wdt_write(struct file *file, const char *data,
177 size_t len, loff_t *ppos)
180{ 178{
181 at91_wdt_reload(); /* pat the watchdog */ 179 at91_wdt_reload(); /* pat the watchdog */
182 return len; 180 return len;
@@ -187,7 +185,7 @@ static ssize_t at91_wdt_write(struct file *file, const char *data, size_t len, l
187static const struct file_operations at91wdt_fops = { 185static const struct file_operations at91wdt_fops = {
188 .owner = THIS_MODULE, 186 .owner = THIS_MODULE,
189 .llseek = no_llseek, 187 .llseek = no_llseek,
190 .ioctl = at91_wdt_ioctl, 188 .unlocked_ioctl = at91_wdt_ioctl,
191 .open = at91_wdt_open, 189 .open = at91_wdt_open,
192 .release = at91_wdt_close, 190 .release = at91_wdt_close,
193 .write = at91_wdt_write, 191 .write = at91_wdt_write,
@@ -211,7 +209,8 @@ static int __init at91wdt_probe(struct platform_device *pdev)
211 if (res) 209 if (res)
212 return res; 210 return res;
213 211
214 printk("AT91 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : ""); 212 printk(KERN_INFO "AT91 Watchdog Timer enabled (%d seconds%s)\n",
213 wdt_time, nowayout ? ", nowayout" : "");
215 return 0; 214 return 0;
216} 215}
217 216
@@ -265,7 +264,8 @@ static struct platform_driver at91wdt_driver = {
265 264
266static int __init at91_wdt_init(void) 265static int __init at91_wdt_init(void)
267{ 266{
268 /* Check that the heartbeat value is within range; if not reset to the default */ 267 /* Check that the heartbeat value is within range;
268 if not reset to the default */
269 if (at91_wdt_settimeout(wdt_time)) { 269 if (at91_wdt_settimeout(wdt_time)) {
270 at91_wdt_settimeout(WDT_DEFAULT_TIME); 270 at91_wdt_settimeout(WDT_DEFAULT_TIME);
271 pr_info("at91_wdt: wdt_time value must be 1 <= wdt_time <= 256, using %d\n", wdt_time); 271 pr_info("at91_wdt: wdt_time value must be 1 <= wdt_time <= 256, using %d\n", wdt_time);