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[WATCHDOG] pcwd.c add debug info

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Add debugging info for the pcwd.c module.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Wim Van Sebroeck 2006-02-12 17:12:55 +01:00
parent 69f83d5216
commit c324ab4281
1 changed files with 56 additions and 0 deletions
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56
drivers/char/watchdog/pcwd.c
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@ -158,6 +158,13 @@ static struct { /* this is private data for each ISA-PC watchdog card */
} 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 @@ static int send_isa_command(int cmd)
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 @@ static int send_isa_command(int cmd)
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 @@ static int set_command_mode(void)
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 @@ static void unset_command_mode(void)
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 @@ static int pcwd_start(void)
return -EIO;
}
}
if (debug >= VERBOSE)
printk(KERN_DEBUG PFX "Watchdog started\n");
return 0;
}
@ -384,6 +411,10 @@ static int pcwd_stop(void)
return -EIO;
}
}
if (debug >= VERBOSE)
printk(KERN_DEBUG PFX "Watchdog stopped\n");
return 0;
}
@ -391,6 +422,10 @@ static int pcwd_keepalive(void)
{
/* 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 @@ static int pcwd_set_heartbeat(int t)
return -EINVAL;
heartbeat = t;
if (debug >= VERBOSE)
printk(KERN_DEBUG PFX "New heartbeat: %d\n",
heartbeat);
return 0;
}
@ -458,8 +498,17 @@ static int pcwd_clear_status(void)
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 @@ static int pcwd_get_temperature(int *temperature)
*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 ssize_t pcwd_write(struct file *file, const char __user *buf, size_t len,
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;
}