diff options
Diffstat (limited to 'drivers/watchdog/mpc8xxx_wdt.c')
-rw-r--r-- | drivers/watchdog/mpc8xxx_wdt.c | 104 |
1 files changed, 52 insertions, 52 deletions
diff --git a/drivers/watchdog/mpc8xxx_wdt.c b/drivers/watchdog/mpc8xxx_wdt.c index fa82ec99ba81..8b82b91caee7 100644 --- a/drivers/watchdog/mpc8xxx_wdt.c +++ b/drivers/watchdog/mpc8xxx_wdt.c | |||
@@ -1,5 +1,5 @@ | |||
1 | /* | 1 | /* |
2 | * mpc83xx_wdt.c - MPC83xx/MPC86xx watchdog userspace interface | 2 | * mpc8xxx_wdt.c - MPC83xx/MPC86xx watchdog userspace interface |
3 | * | 3 | * |
4 | * Authors: Dave Updegraff <dave@cray.org> | 4 | * Authors: Dave Updegraff <dave@cray.org> |
5 | * Kumar Gala <galak@kernel.crashing.org> | 5 | * Kumar Gala <galak@kernel.crashing.org> |
@@ -29,7 +29,7 @@ | |||
29 | #include <linux/uaccess.h> | 29 | #include <linux/uaccess.h> |
30 | #include <sysdev/fsl_soc.h> | 30 | #include <sysdev/fsl_soc.h> |
31 | 31 | ||
32 | struct mpc83xx_wdt { | 32 | struct mpc8xxx_wdt { |
33 | __be32 res0; | 33 | __be32 res0; |
34 | __be32 swcrr; /* System watchdog control register */ | 34 | __be32 swcrr; /* System watchdog control register */ |
35 | #define SWCRR_SWTC 0xFFFF0000 /* Software Watchdog Time Count. */ | 35 | #define SWCRR_SWTC 0xFFFF0000 /* Software Watchdog Time Count. */ |
@@ -42,12 +42,12 @@ struct mpc83xx_wdt { | |||
42 | u8 res2[0xF0]; | 42 | u8 res2[0xF0]; |
43 | }; | 43 | }; |
44 | 44 | ||
45 | struct mpc83xx_wdt_type { | 45 | struct mpc8xxx_wdt_type { |
46 | int prescaler; | 46 | int prescaler; |
47 | bool hw_enabled; | 47 | bool hw_enabled; |
48 | }; | 48 | }; |
49 | 49 | ||
50 | static struct mpc83xx_wdt __iomem *wd_base; | 50 | static struct mpc8xxx_wdt __iomem *wd_base; |
51 | 51 | ||
52 | static u16 timeout = 0xffff; | 52 | static u16 timeout = 0xffff; |
53 | module_param(timeout, ushort, 0); | 53 | module_param(timeout, ushort, 0); |
@@ -74,7 +74,7 @@ static unsigned int timeout_sec; | |||
74 | static unsigned long wdt_is_open; | 74 | static unsigned long wdt_is_open; |
75 | static DEFINE_SPINLOCK(wdt_spinlock); | 75 | static DEFINE_SPINLOCK(wdt_spinlock); |
76 | 76 | ||
77 | static void mpc83xx_wdt_keepalive(void) | 77 | static void mpc8xxx_wdt_keepalive(void) |
78 | { | 78 | { |
79 | /* Ping the WDT */ | 79 | /* Ping the WDT */ |
80 | spin_lock(&wdt_spinlock); | 80 | spin_lock(&wdt_spinlock); |
@@ -83,31 +83,31 @@ static void mpc83xx_wdt_keepalive(void) | |||
83 | spin_unlock(&wdt_spinlock); | 83 | spin_unlock(&wdt_spinlock); |
84 | } | 84 | } |
85 | 85 | ||
86 | static void mpc83xx_wdt_timer_ping(unsigned long arg); | 86 | static void mpc8xxx_wdt_timer_ping(unsigned long arg); |
87 | static DEFINE_TIMER(wdt_timer, mpc83xx_wdt_timer_ping, 0, 0); | 87 | static DEFINE_TIMER(wdt_timer, mpc8xxx_wdt_timer_ping, 0, 0); |
88 | 88 | ||
89 | static void mpc83xx_wdt_timer_ping(unsigned long arg) | 89 | static void mpc8xxx_wdt_timer_ping(unsigned long arg) |
90 | { | 90 | { |
91 | mpc83xx_wdt_keepalive(); | 91 | mpc8xxx_wdt_keepalive(); |
92 | /* We're pinging it twice faster than needed, just to be sure. */ | 92 | /* We're pinging it twice faster than needed, just to be sure. */ |
93 | mod_timer(&wdt_timer, jiffies + HZ * timeout_sec / 2); | 93 | mod_timer(&wdt_timer, jiffies + HZ * timeout_sec / 2); |
94 | } | 94 | } |
95 | 95 | ||
96 | static void mpc83xx_wdt_pr_warn(const char *msg) | 96 | static void mpc8xxx_wdt_pr_warn(const char *msg) |
97 | { | 97 | { |
98 | pr_crit("mpc83xx_wdt: %s, expect the %s soon!\n", msg, | 98 | pr_crit("mpc8xxx_wdt: %s, expect the %s soon!\n", msg, |
99 | reset ? "reset" : "machine check exception"); | 99 | reset ? "reset" : "machine check exception"); |
100 | } | 100 | } |
101 | 101 | ||
102 | static ssize_t mpc83xx_wdt_write(struct file *file, const char __user *buf, | 102 | static ssize_t mpc8xxx_wdt_write(struct file *file, const char __user *buf, |
103 | size_t count, loff_t *ppos) | 103 | size_t count, loff_t *ppos) |
104 | { | 104 | { |
105 | if (count) | 105 | if (count) |
106 | mpc83xx_wdt_keepalive(); | 106 | mpc8xxx_wdt_keepalive(); |
107 | return count; | 107 | return count; |
108 | } | 108 | } |
109 | 109 | ||
110 | static int mpc83xx_wdt_open(struct inode *inode, struct file *file) | 110 | static int mpc8xxx_wdt_open(struct inode *inode, struct file *file) |
111 | { | 111 | { |
112 | u32 tmp = SWCRR_SWEN; | 112 | u32 tmp = SWCRR_SWEN; |
113 | if (test_and_set_bit(0, &wdt_is_open)) | 113 | if (test_and_set_bit(0, &wdt_is_open)) |
@@ -132,17 +132,17 @@ static int mpc83xx_wdt_open(struct inode *inode, struct file *file) | |||
132 | return nonseekable_open(inode, file); | 132 | return nonseekable_open(inode, file); |
133 | } | 133 | } |
134 | 134 | ||
135 | static int mpc83xx_wdt_release(struct inode *inode, struct file *file) | 135 | static int mpc8xxx_wdt_release(struct inode *inode, struct file *file) |
136 | { | 136 | { |
137 | if (!nowayout) | 137 | if (!nowayout) |
138 | mpc83xx_wdt_timer_ping(0); | 138 | mpc8xxx_wdt_timer_ping(0); |
139 | else | 139 | else |
140 | mpc83xx_wdt_pr_warn("watchdog closed"); | 140 | mpc8xxx_wdt_pr_warn("watchdog closed"); |
141 | clear_bit(0, &wdt_is_open); | 141 | clear_bit(0, &wdt_is_open); |
142 | return 0; | 142 | return 0; |
143 | } | 143 | } |
144 | 144 | ||
145 | static long mpc83xx_wdt_ioctl(struct file *file, unsigned int cmd, | 145 | static long mpc8xxx_wdt_ioctl(struct inode *inode, struct file *file, |
146 | unsigned long arg) | 146 | unsigned long arg) |
147 | { | 147 | { |
148 | void __user *argp = (void __user *)arg; | 148 | void __user *argp = (void __user *)arg; |
@@ -150,7 +150,7 @@ static long mpc83xx_wdt_ioctl(struct file *file, unsigned int cmd, | |||
150 | static struct watchdog_info ident = { | 150 | static struct watchdog_info ident = { |
151 | .options = WDIOF_KEEPALIVEPING, | 151 | .options = WDIOF_KEEPALIVEPING, |
152 | .firmware_version = 1, | 152 | .firmware_version = 1, |
153 | .identity = "MPC83xx", | 153 | .identity = "MPC8xxx", |
154 | }; | 154 | }; |
155 | 155 | ||
156 | switch (cmd) { | 156 | switch (cmd) { |
@@ -160,7 +160,7 @@ static long mpc83xx_wdt_ioctl(struct file *file, unsigned int cmd, | |||
160 | case WDIOC_GETBOOTSTATUS: | 160 | case WDIOC_GETBOOTSTATUS: |
161 | return put_user(0, p); | 161 | return put_user(0, p); |
162 | case WDIOC_KEEPALIVE: | 162 | case WDIOC_KEEPALIVE: |
163 | mpc83xx_wdt_keepalive(); | 163 | mpc8xxx_wdt_keepalive(); |
164 | return 0; | 164 | return 0; |
165 | case WDIOC_GETTIMEOUT: | 165 | case WDIOC_GETTIMEOUT: |
166 | return put_user(timeout_sec, p); | 166 | return put_user(timeout_sec, p); |
@@ -169,27 +169,27 @@ static long mpc83xx_wdt_ioctl(struct file *file, unsigned int cmd, | |||
169 | } | 169 | } |
170 | } | 170 | } |
171 | 171 | ||
172 | static const struct file_operations mpc83xx_wdt_fops = { | 172 | static const struct file_operations mpc8xxx_wdt_fops = { |
173 | .owner = THIS_MODULE, | 173 | .owner = THIS_MODULE, |
174 | .llseek = no_llseek, | 174 | .llseek = no_llseek, |
175 | .write = mpc83xx_wdt_write, | 175 | .write = mpc8xxx_wdt_write, |
176 | .unlocked_ioctl = mpc83xx_wdt_ioctl, | 176 | .unlocked_ioctl = mpc8xxx_wdt_ioctl, |
177 | .open = mpc83xx_wdt_open, | 177 | .open = mpc8xxx_wdt_open, |
178 | .release = mpc83xx_wdt_release, | 178 | .release = mpc8xxx_wdt_release, |
179 | }; | 179 | }; |
180 | 180 | ||
181 | static struct miscdevice mpc83xx_wdt_miscdev = { | 181 | static struct miscdevice mpc8xxx_wdt_miscdev = { |
182 | .minor = WATCHDOG_MINOR, | 182 | .minor = WATCHDOG_MINOR, |
183 | .name = "watchdog", | 183 | .name = "watchdog", |
184 | .fops = &mpc83xx_wdt_fops, | 184 | .fops = &mpc8xxx_wdt_fops, |
185 | }; | 185 | }; |
186 | 186 | ||
187 | static int __devinit mpc83xx_wdt_probe(struct of_device *ofdev, | 187 | static int __devinit mpc8xxx_wdt_probe(struct of_device *ofdev, |
188 | const struct of_device_id *match) | 188 | const struct of_device_id *match) |
189 | { | 189 | { |
190 | int ret; | 190 | int ret; |
191 | struct device_node *np = ofdev->node; | 191 | struct device_node *np = ofdev->node; |
192 | struct mpc83xx_wdt_type *wdt_type = match->data; | 192 | struct mpc8xxx_wdt_type *wdt_type = match->data; |
193 | u32 freq = fsl_get_sys_freq(); | 193 | u32 freq = fsl_get_sys_freq(); |
194 | bool enabled; | 194 | bool enabled; |
195 | 195 | ||
@@ -202,12 +202,12 @@ static int __devinit mpc83xx_wdt_probe(struct of_device *ofdev, | |||
202 | 202 | ||
203 | enabled = in_be32(&wd_base->swcrr) & SWCRR_SWEN; | 203 | enabled = in_be32(&wd_base->swcrr) & SWCRR_SWEN; |
204 | if (!enabled && wdt_type->hw_enabled) { | 204 | if (!enabled && wdt_type->hw_enabled) { |
205 | pr_info("mpc83xx_wdt: could not be enabled in software\n"); | 205 | pr_info("mpc8xxx_wdt: could not be enabled in software\n"); |
206 | ret = -ENOSYS; | 206 | ret = -ENOSYS; |
207 | goto err_unmap; | 207 | goto err_unmap; |
208 | } | 208 | } |
209 | 209 | ||
210 | ret = misc_register(&mpc83xx_wdt_miscdev); | 210 | ret = misc_register(&mpc8xxx_wdt_miscdev); |
211 | if (ret) { | 211 | if (ret) { |
212 | pr_err("cannot register miscdev on minor=%d (err=%d)\n", | 212 | pr_err("cannot register miscdev on minor=%d (err=%d)\n", |
213 | WATCHDOG_MINOR, ret); | 213 | WATCHDOG_MINOR, ret); |
@@ -220,73 +220,73 @@ static int __devinit mpc83xx_wdt_probe(struct of_device *ofdev, | |||
220 | else | 220 | else |
221 | timeout_sec = timeout / freq; | 221 | timeout_sec = timeout / freq; |
222 | 222 | ||
223 | pr_info("WDT driver for MPC83xx initialized. mode:%s timeout=%d " | 223 | pr_info("WDT driver for MPC8xxx initialized. mode:%s timeout=%d " |
224 | "(%d seconds)\n", reset ? "reset" : "interrupt", timeout, | 224 | "(%d seconds)\n", reset ? "reset" : "interrupt", timeout, |
225 | timeout_sec); | 225 | timeout_sec); |
226 | 226 | ||
227 | /* | 227 | /* |
228 | * If the watchdog was previously enabled or we're running on | 228 | * If the watchdog was previously enabled or we're running on |
229 | * MPC86xx, we should ping the wdt from the kernel until the | 229 | * MPC8xxx, we should ping the wdt from the kernel until the |
230 | * userspace handles it. | 230 | * userspace handles it. |
231 | */ | 231 | */ |
232 | if (enabled) | 232 | if (enabled) |
233 | mpc83xx_wdt_timer_ping(0); | 233 | mpc8xxx_wdt_timer_ping(0); |
234 | return 0; | 234 | return 0; |
235 | err_unmap: | 235 | err_unmap: |
236 | iounmap(wd_base); | 236 | iounmap(wd_base); |
237 | return ret; | 237 | return ret; |
238 | } | 238 | } |
239 | 239 | ||
240 | static int __devexit mpc83xx_wdt_remove(struct of_device *ofdev) | 240 | static int __devexit mpc8xxx_wdt_remove(struct of_device *ofdev) |
241 | { | 241 | { |
242 | mpc83xx_wdt_pr_warn("watchdog removed"); | 242 | mpc8xxx_wdt_pr_warn("watchdog removed"); |
243 | del_timer_sync(&wdt_timer); | 243 | del_timer_sync(&wdt_timer); |
244 | misc_deregister(&mpc83xx_wdt_miscdev); | 244 | misc_deregister(&mpc8xxx_wdt_miscdev); |
245 | iounmap(wd_base); | 245 | iounmap(wd_base); |
246 | 246 | ||
247 | return 0; | 247 | return 0; |
248 | } | 248 | } |
249 | 249 | ||
250 | static const struct of_device_id mpc83xx_wdt_match[] = { | 250 | static const struct of_device_id mpc8xxx_wdt_match[] = { |
251 | { | 251 | { |
252 | .compatible = "mpc83xx_wdt", | 252 | .compatible = "mpc83xx_wdt", |
253 | .data = &(struct mpc83xx_wdt_type) { | 253 | .data = &(struct mpc8xxx_wdt_type) { |
254 | .prescaler = 0x10000, | 254 | .prescaler = 0x10000, |
255 | }, | 255 | }, |
256 | }, | 256 | }, |
257 | { | 257 | { |
258 | .compatible = "fsl,mpc8610-wdt", | 258 | .compatible = "fsl,mpc8610-wdt", |
259 | .data = &(struct mpc83xx_wdt_type) { | 259 | .data = &(struct mpc8xxx_wdt_type) { |
260 | .prescaler = 0x10000, | 260 | .prescaler = 0x10000, |
261 | .hw_enabled = true, | 261 | .hw_enabled = true, |
262 | }, | 262 | }, |
263 | }, | 263 | }, |
264 | {}, | 264 | {}, |
265 | }; | 265 | }; |
266 | MODULE_DEVICE_TABLE(of, mpc83xx_wdt_match); | 266 | MODULE_DEVICE_TABLE(of, mpc8xxx_wdt_match); |
267 | 267 | ||
268 | static struct of_platform_driver mpc83xx_wdt_driver = { | 268 | static struct of_platform_driver mpc8xxx_wdt_driver = { |
269 | .match_table = mpc83xx_wdt_match, | 269 | .match_table = mpc8xxx_wdt_match, |
270 | .probe = mpc83xx_wdt_probe, | 270 | .probe = mpc8xxx_wdt_probe, |
271 | .remove = __devexit_p(mpc83xx_wdt_remove), | 271 | .remove = __devexit_p(mpc8xxx_wdt_remove), |
272 | .driver = { | 272 | .driver = { |
273 | .name = "mpc83xx_wdt", | 273 | .name = "mpc8xxx_wdt", |
274 | .owner = THIS_MODULE, | 274 | .owner = THIS_MODULE, |
275 | }, | 275 | }, |
276 | }; | 276 | }; |
277 | 277 | ||
278 | static int __init mpc83xx_wdt_init(void) | 278 | static int __init mpc8xxx_wdt_init(void) |
279 | { | 279 | { |
280 | return of_register_platform_driver(&mpc83xx_wdt_driver); | 280 | return of_register_platform_driver(&mpc8xxx_wdt_driver); |
281 | } | 281 | } |
282 | 282 | ||
283 | static void __exit mpc83xx_wdt_exit(void) | 283 | static void __exit mpc8xxx_wdt_exit(void) |
284 | { | 284 | { |
285 | of_unregister_platform_driver(&mpc83xx_wdt_driver); | 285 | of_unregister_platform_driver(&mpc8xxx_wdt_driver); |
286 | } | 286 | } |
287 | 287 | ||
288 | subsys_initcall(mpc83xx_wdt_init); | 288 | subsys_initcall(mpc8xxx_wdt_init); |
289 | module_exit(mpc83xx_wdt_exit); | 289 | module_exit(mpc8xxx_wdt_exit); |
290 | 290 | ||
291 | MODULE_AUTHOR("Dave Updegraff, Kumar Gala"); | 291 | MODULE_AUTHOR("Dave Updegraff, Kumar Gala"); |
292 | MODULE_DESCRIPTION("Driver for watchdog timer in MPC83xx/MPC86xx uProcessors"); | 292 | MODULE_DESCRIPTION("Driver for watchdog timer in MPC83xx/MPC86xx uProcessors"); |