[WATCHDOG] pcwd.c add debug info
Add debugging info for the pcwd.c module.
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/drivers/char/watchdog/pcwd.c b/drivers/char/watchdog/pcwd.c
index e952c9b..0e4b3df 100644
--- a/drivers/char/watchdog/pcwd.c
+++ b/drivers/char/watchdog/pcwd.c
@@ -158,6 +158,13 @@
} pcwd_private;
/* module parameters */
+#define QUIET 0 /* Default */
+#define VERBOSE 1 /* Verbose */
+#define DEBUG 2 /* print fancy stuff too */
+static int debug = QUIET;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
+
#define WATCHDOG_HEARTBEAT 60 /* 60 sec default heartbeat */
static int heartbeat = WATCHDOG_HEARTBEAT;
module_param(heartbeat, int, 0);
@@ -177,6 +184,10 @@
int control_status;
int port0, last_port0; /* Double read for stabilising */
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "sending following data cmd=0x%02x\n",
+ cmd);
+
/* The WCMD bit must be 1 and the command is only 4 bits in size */
control_status = (cmd & 0x0F) | WD_WCMD;
outb_p(control_status, pcwd_private.io_addr + 2);
@@ -193,6 +204,10 @@
udelay (250);
}
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: port0=0x%02x last_port0=0x%02x\n",
+ cmd, port0, last_port0);
+
return port0;
}
@@ -219,6 +234,10 @@
spin_unlock(&pcwd_private.io_lock);
pcwd_private.command_mode = found;
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "command_mode=%d\n",
+ pcwd_private.command_mode);
+
return(found);
}
@@ -231,6 +250,10 @@
spin_unlock(&pcwd_private.io_lock);
pcwd_private.command_mode = 0;
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "command_mode=%d\n",
+ pcwd_private.command_mode);
}
static inline void pcwd_check_temperature_support(void)
@@ -360,6 +383,10 @@
return -EIO;
}
}
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "Watchdog started\n");
+
return 0;
}
@@ -384,6 +411,10 @@
return -EIO;
}
}
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "Watchdog stopped\n");
+
return 0;
}
@@ -391,6 +422,10 @@
{
/* user land ping */
pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ);
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
+
return 0;
}
@@ -400,6 +435,11 @@
return -EINVAL;
heartbeat = t;
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "New heartbeat: %d\n",
+ heartbeat);
+
return 0;
}
@@ -458,8 +498,17 @@
if (pcwd_private.revision == PCWD_REVISION_C) {
spin_lock(&pcwd_private.io_lock);
+ if (debug >= VERBOSE)
+ printk(KERN_INFO PFX "clearing watchdog trip status\n");
+
control_status = inb_p(pcwd_private.io_addr + 1);
+ if (debug >= DEBUG) {
+ printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
+ printk(KERN_DEBUG PFX "sending: 0x%02x\n",
+ (control_status & WD_REVC_R2DS));
+ }
+
/* clear reset status & Keep Relay 2 disable state as it is */
outb_p((control_status & WD_REVC_R2DS), pcwd_private.io_addr + 1);
@@ -486,6 +535,11 @@
*temperature = ((inb(pcwd_private.io_addr)) * 9 / 5) + 32;
spin_unlock(&pcwd_private.io_lock);
+ if (debug >= DEBUG) {
+ printk(KERN_DEBUG PFX "temperature is: %d F\n",
+ *temperature);
+ }
+
return 0;
}
@@ -604,6 +658,8 @@
static int pcwd_open(struct inode *inode, struct file *file)
{
if (!atomic_dec_and_test(&open_allowed) ) {
+ if (debug >= VERBOSE)
+ printk(KERN_ERR PFX "Attempt to open already opened device.\n");
atomic_inc( &open_allowed );
return -EBUSY;
}