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Code

cleanup danube watchdog timer

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9730 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
blogic 2007-12-13 20:02:52 +00:00
parent e68c9c6464
commit 72c2e437fa
1 changed files with 17 additions and 27 deletions
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44
target/linux/danube/files/drivers/char/watchdog/danube_wdt.c
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@ -18,28 +18,17 @@
* *
*/ */
#include <linux/module.h> #include <asm/uaccess.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/fs.h>
#include <linux/errno.h> #include <linux/errno.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/tty.h>
#include <linux/selection.h>
#include <linux/kmod.h>
#include <linux/vmalloc.h>
#include <linux/kdev_t.h>
#include <linux/ioctl.h> #include <linux/ioctl.h>
#include <asm/uaccess.h> #include <linux/module.h>
#include <asm/system.h>
#include <asm-mips/danube/danube_wdt.h> #include <asm-mips/danube/danube_wdt.h>
#include <asm-mips/danube/danube.h> #include <asm-mips/danube/danube.h>
// TODO remove magic numbers and weirdo macros
extern unsigned int danube_get_fpi_hz (void); extern unsigned int danube_get_fpi_hz (void);
static int danube_wdt_inuse = 0; static int danube_wdt_inuse = 0;
@ -90,8 +79,8 @@ danube_wdt_enable (unsigned int timeout)
DANUBE_BIU_WDT_CR_RELOAD_SET(wdt_reload) | DANUBE_BIU_WDT_CR_RELOAD_SET(wdt_reload) |
DANUBE_BIU_WDT_CR_GEN); DANUBE_BIU_WDT_CR_GEN);
/* Set reload value in second password access */
writel(wdt_cr, DANUBE_BIU_WDT_CR); writel(wdt_cr, DANUBE_BIU_WDT_CR);
printk("watchdog enabled\n"); printk("watchdog enabled\n");
out: out:
@ -101,11 +90,10 @@ out:
void void
danube_wdt_disable (void) danube_wdt_disable (void)
{ {
/* Write first part of password access */
writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR); writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
/* Disable the watchdog in second password access (GEN=0) */
writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2), DANUBE_BIU_WDT_CR); writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2), DANUBE_BIU_WDT_CR);
printk("watchdog disabled\n");
} }
/* passed LPEN or DSEN */ /* passed LPEN or DSEN */
@ -127,7 +115,6 @@ danube_wdt_enable_feature (int en, int type)
wdt_cr |= DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2); wdt_cr |= DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2);
} }
/* Set reload value in second password access */
writel(wdt_cr, DANUBE_BIU_WDT_CR); writel(wdt_cr, DANUBE_BIU_WDT_CR);
} }
@ -140,8 +127,7 @@ danube_wdt_prewarning_limit (int pwl)
writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR); writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
wdt_cr &= 0xf300ffff; wdt_cr &= 0xf300ffff;
wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) | wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) | DANUBE_BIU_WDT_CR_PWL_SET(pwl));
DANUBE_BIU_WDT_CR_PWL_SET(pwl));
/* Set reload value in second password access */ /* Set reload value in second password access */
writel(wdt_cr, DANUBE_BIU_WDT_CR); writel(wdt_cr, DANUBE_BIU_WDT_CR);
@ -156,8 +142,7 @@ danube_wdt_set_clkdiv (int clkdiv)
writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR); writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
wdt_cr &= 0xfc00ffff; wdt_cr &= 0xfc00ffff;
wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) | wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) | DANUBE_BIU_WDT_CR_CLKDIV_SET(clkdiv));
DANUBE_BIU_WDT_CR_CLKDIV_SET(clkdiv));
/* Set reload value in second password access */ /* Set reload value in second password access */
writel(wdt_cr, DANUBE_BIU_WDT_CR); writel(wdt_cr, DANUBE_BIU_WDT_CR);
@ -173,14 +158,15 @@ danube_wdt_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
if ((cmd != DANUBE_WDT_IOC_STOP) && (cmd != DANUBE_WDT_IOC_PING) && (cmd != DANUBE_WDT_IOC_GET_STATUS)) if ((cmd != DANUBE_WDT_IOC_STOP) && (cmd != DANUBE_WDT_IOC_PING) && (cmd != DANUBE_WDT_IOC_GET_STATUS))
{ {
if (copy_from_user((void *) &user_arg, (void *) arg, sizeof (int))) if (copy_from_user((void *) &user_arg, (void *) arg, sizeof (int))){
result = -EINVAL; result = -EINVAL;
goto out;
}
} }
switch (cmd) switch (cmd)
{ {
case DANUBE_WDT_IOC_START: case DANUBE_WDT_IOC_START:
printk("enable watch dog timer!\n");
if ((result = danube_wdt_enable(user_arg)) < 0) if ((result = danube_wdt_enable(user_arg)) < 0)
timeout = -1; timeout = -1;
else else
@ -219,8 +205,12 @@ danube_wdt_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
case DANUBE_WDT_IOC_SET_CLKDIV: case DANUBE_WDT_IOC_SET_CLKDIV:
danube_wdt_set_clkdiv(user_arg); danube_wdt_set_clkdiv(user_arg);
break; break;
default:
printk("unknown watchdog iotcl\n");
} }
out:
return result; return result;
} }