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-rw-r--r--target/linux/danube/files/drivers/char/watchdog/danube_wdt.c155
1 files changed, 50 insertions, 105 deletions
diff --git a/target/linux/danube/files/drivers/char/watchdog/danube_wdt.c b/target/linux/danube/files/drivers/char/watchdog/danube_wdt.c
index 036a4ece49..59901b7bec 100644
--- a/target/linux/danube/files/drivers/char/watchdog/danube_wdt.c
+++ b/target/linux/danube/files/drivers/char/watchdog/danube_wdt.c
@@ -50,40 +50,12 @@ danube_wdt_enable (unsigned int timeout)
{
unsigned int wdt_cr = 0;
unsigned int wdt_reload = 0;
- unsigned int wdt_clkdiv, clkdiv, wdt_pwl, pwl, ffpi;
+ unsigned int wdt_clkdiv, wdt_pwl, ffpi;
+ int retval = 0;
/* clock divider & prewarning limit */
- switch (clkdiv = DANUBE_BIU_WDT_CR_CLKDIV_GET(readl(DANUBE_BIU_WDT_CR)))
- {
- case 0:
- wdt_clkdiv = 1;
- break;
- case 1:
- wdt_clkdiv = 64;
- break;
- case 2:
- wdt_clkdiv = 4096;
- break;
- case 3:
- wdt_clkdiv = 262144;
- break;
- }
-
- switch (pwl = DANUBE_BIU_WDT_CR_PWL_GET (readl(DANUBE_BIU_WDT_CR)))
- {
- case 0:
- wdt_pwl = 0x8000;
- break;
- case 1:
- wdt_pwl = 0x4000;
- break;
- case 2:
- wdt_pwl = 0x2000;
- break;
- case 3:
- wdt_pwl = 0x1000;
- break;
- }
+ wdt_clkdiv = 1 << (7 * DANUBE_BIU_WDT_CR_CLKDIV_GET(readl(DANUBE_BIU_WDT_CR)));
+ wdt_pwl = 0x8000 >> DANUBE_BIU_WDT_CR_PWL_GET(readl(DANUBE_BIU_WDT_CR));
//TODO
printk("WARNING FUNCTION CALL MISSING!!!");
@@ -96,30 +68,34 @@ danube_wdt_enable (unsigned int timeout)
printk("wdt_pwl=0x%x, wdt_clkdiv=%d, ffpi=%d, wdt_reload = 0x%x\n",
wdt_pwl, wdt_clkdiv, ffpi, wdt_reload);
- if (wdt_reload > 0xFFFF) {
+ if (wdt_reload > 0xFFFF)
+ {
printk ("timeout too large %d\n", timeout);
- return -EINVAL;
+ retval = -EINVAL;
+ goto out;
}
/* Write first part of password access */
- *DANUBE_BIU_WDT_CR = DANUBE_BIU_WDT_CR_PW_SET (DANUBE_WDT_PW1);
-
- wdt_cr = *DANUBE_BIU_WDT_CR;
- wdt_cr &= (!DANUBE_BIU_WDT_CR_PW_SET (0xff) &
- !DANUBE_BIU_WDT_CR_PWL_SET (0x3) &
- !DANUBE_BIU_WDT_CR_CLKDIV_SET (0x3) &
- !DANUBE_BIU_WDT_CR_RELOAD_SET (0xffff));
-
- wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET (DANUBE_WDT_PW2) |
- DANUBE_BIU_WDT_CR_PWL_SET (pwl) |
- DANUBE_BIU_WDT_CR_CLKDIV_SET (clkdiv) |
- DANUBE_BIU_WDT_CR_RELOAD_SET (wdt_reload) |
+ writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
+
+ wdt_cr = readl(DANUBE_BIU_WDT_CR);
+ wdt_cr &= (!DANUBE_BIU_WDT_CR_PW_SET(0xff) &
+ !DANUBE_BIU_WDT_CR_PWL_SET(0x3) &
+ !DANUBE_BIU_WDT_CR_CLKDIV_SET(0x3) &
+ !DANUBE_BIU_WDT_CR_RELOAD_SET(0xffff));
+
+ wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) |
+ DANUBE_BIU_WDT_CR_PWL_SET(DANUBE_BIU_WDT_CR_PWL_GET(readl(DANUBE_BIU_WDT_CR))) |
+ DANUBE_BIU_WDT_CR_CLKDIV_SET(DANUBE_BIU_WDT_CR_CLKDIV_GET(readl(DANUBE_BIU_WDT_CR))) |
+ DANUBE_BIU_WDT_CR_RELOAD_SET(wdt_reload) |
DANUBE_BIU_WDT_CR_GEN);
/* Set reload value in second password access */
- *DANUBE_BIU_WDT_CR = wdt_cr;
- printk ("enabled\n");
- return 0;
+ writel(wdt_cr, DANUBE_BIU_WDT_CR);
+ printk("watchdog enabled\n");
+
+out:
+ return retval;
}
void
@@ -132,8 +108,9 @@ danube_wdt_disable (void)
writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2), DANUBE_BIU_WDT_CR);
}
+/* passed LPEN or DSEN */
void
-danube_wdt_low_power (int en)
+danube_wdt_low_power_or_debug (int en, int type)
{
unsigned int wdt_cr = 0;
@@ -143,40 +120,11 @@ danube_wdt_low_power (int en)
if (en)
{
- wdt_cr &= (!DANUBE_BIU_WDT_CR_PW_SET(0xff));
- wdt_cr |=
- (DANUBE_BIU_WDT_CR_PW_SET (DANUBE_WDT_PW2) |
- DANUBE_BIU_WDT_CR_LPEN);
- }
- else {
- wdt_cr &= (!DANUBE_BIU_WDT_CR_PW_SET (0xff) &
- !DANUBE_BIU_WDT_CR_LPEN);
- 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);
-}
-
-void
-danube_wdt_debug_suspend (int en)
-{
- unsigned int wdt_cr = 0;
-
- writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
-
- wdt_cr = readl(DANUBE_BIU_WDT_CR);
- if (en)
- {
- wdt_cr &= (!DANUBE_BIU_WDT_CR_PW_SET (0xff));
- wdt_cr |=
- (DANUBE_BIU_WDT_CR_PW_SET (DANUBE_WDT_PW2) |
- DANUBE_BIU_WDT_CR_DSEN);
- }
- else {
- wdt_cr &= (!DANUBE_BIU_WDT_CR_PW_SET (0xff) &
- !DANUBE_BIU_WDT_CR_DSEN);
- wdt_cr |= DANUBE_BIU_WDT_CR_PW_SET (DANUBE_WDT_PW2);
+ wdt_cr &= (~DANUBE_BIU_WDT_CR_PW_SET(0xff));
+ wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) | type);
+ } else {
+ wdt_cr &= (~DANUBE_BIU_WDT_CR_PW_SET(0xff) & ~type);
+ wdt_cr |= DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2);
}
/* Set reload value in second password access */
@@ -191,10 +139,9 @@ danube_wdt_prewarning_limit (int pwl)
wdt_cr = readl(DANUBE_BIU_WDT_CR);
writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
- wdt_cr &= 0xff00ffff; //(!DANUBE_BIU_WDT_CR_PW_SET(0xff));
- wdt_cr &= 0xf3ffffff; //(!DANUBE_BIU_WDT_CR_PWL_SET(3));
- wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET (DANUBE_WDT_PW2) |
- DANUBE_BIU_WDT_CR_PWL_SET (pwl));
+ wdt_cr &= 0xf300ffff;
+ wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) |
+ DANUBE_BIU_WDT_CR_PWL_SET(pwl));
/* Set reload value in second password access */
writel(wdt_cr, DANUBE_BIU_WDT_CR);
@@ -208,10 +155,9 @@ danube_wdt_set_clkdiv (int clkdiv)
wdt_cr = readl(DANUBE_BIU_WDT_CR);
writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
- wdt_cr &= 0xff00ffff; //(!DANUBE_BIU_WDT_CR_PW_SET(0xff));
- wdt_cr &= 0xfcffffff; //(!DANUBE_BIU_WDT_CR_CLKDIV_SET(3));
- wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET (DANUBE_WDT_PW2) |
- DANUBE_BIU_WDT_CR_CLKDIV_SET (clkdiv));
+ wdt_cr &= 0xfc00ffff;
+ wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) |
+ DANUBE_BIU_WDT_CR_CLKDIV_SET(clkdiv));
/* Set reload value in second password access */
writel(wdt_cr, DANUBE_BIU_WDT_CR);
@@ -254,6 +200,11 @@ danube_wdt_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
result = danube_wdt_enable(timeout);
break;
+ case DANUBE_WDT_IOC_GET_STATUS:
+ istatus = readl(DANUBE_BIU_WDT_SR);
+ copy_to_user((int *) arg, (int *) &istatus, sizeof (int));
+ break;
+
case DANUBE_WDT_IOC_SET_PWL:
if (copy_from_user((void *) &pwl, (void *) arg, sizeof (int)))
result = -EINVAL;
@@ -263,24 +214,19 @@ danube_wdt_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
case DANUBE_WDT_IOC_SET_DSEN:
if (copy_from_user((void *) &en, (void *) arg, sizeof (int)))
result = -EINVAL;
- danube_wdt_debug_suspend (en);
+ danube_wdt_low_power_or_debug(en, DANUBE_BIU_WDT_CR_DSEN);
break;
case DANUBE_WDT_IOC_SET_LPEN:
if (copy_from_user((void *) &en, (void *) arg, sizeof (int)))
result = -EINVAL;
- danube_wdt_low_power(en);
+ danube_wdt_low_power_or_debug(en, DANUBE_BIU_WDT_CR_LPEN);
break;
case DANUBE_WDT_IOC_SET_CLKDIV:
if (copy_from_user((void *) &clkdiv, (void *) arg, sizeof (int)))
result = -EINVAL;
- danube_wdt_set_clkdiv (clkdiv);
- break;
-
- case DANUBE_WDT_IOC_GET_STATUS:
- istatus = readl(DANUBE_BIU_WDT_SR);
- copy_to_user((int *) arg, (int *) &istatus, sizeof (int));
+ danube_wdt_set_clkdiv(clkdiv);
break;
}
@@ -292,6 +238,7 @@ danube_wdt_open (struct inode *inode, struct file *file)
{
if (danube_wdt_inuse)
return -EBUSY;
+
danube_wdt_inuse = 1;
return 0;
@@ -310,14 +257,12 @@ danube_wdt_register_proc_read (char *buf, char **start, off_t offset, int count,
int *eof, void *data)
{
int len = 0;
- len += sprintf (buf + len, "DANUBE_BIU_WDT_PROC_READ\n");
+ len += sprintf (buf + len, "DANUBE_BIU_WDT_PROC_READ\n");
len += sprintf (buf + len, "DANUBE_BIU_WDT_CR(0x%08x) : 0x%08x\n",
- (unsigned int)DANUBE_BIU_WDT_CR,
- readl(DANUBE_BIU_WDT_CR));
+ (unsigned int)DANUBE_BIU_WDT_CR, readl(DANUBE_BIU_WDT_CR));
len += sprintf (buf + len, "DANUBE_BIU_WDT_SR(0x%08x) : 0x%08x\n",
- (unsigned int)DANUBE_BIU_WDT_SR,
- readl(DANUBE_BIU_WDT_SR));
+ (unsigned int)DANUBE_BIU_WDT_SR, readl(DANUBE_BIU_WDT_SR));
*eof = 1;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 12:43:59 +0000