diff options
| -rw-r--r-- | drivers/char/watchdog/pcwd.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/char/watchdog/pcwd.c b/drivers/char/watchdog/pcwd.c index e952c9bc12b..0e4b3dfa008 100644 --- a/drivers/char/watchdog/pcwd.c +++ b/drivers/char/watchdog/pcwd.c @@ -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; } |