diff options
Diffstat (limited to 'drivers/char/watchdog/pcwd_pci.c')
| -rw-r--r-- | drivers/char/watchdog/pcwd_pci.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/char/watchdog/pcwd_pci.c b/drivers/char/watchdog/pcwd_pci.c index 0cb62e39e58..0b8e493be04 100644 --- a/drivers/char/watchdog/pcwd_pci.c +++ b/drivers/char/watchdog/pcwd_pci.c @@ -111,6 +111,13 @@ static struct { /* this is private data for each PCI-PC watchdog card */ } pcipcwd_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 2 /* 2 sec default heartbeat */ static int heartbeat = WATCHDOG_HEARTBEAT; module_param(heartbeat, int, 0); @@ -128,6 +135,10 @@ static int send_command(int cmd, int *msb, int *lsb) { int got_response, count; + if (debug >= DEBUG) + printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n", + cmd, *msb, *lsb); + spin_lock(&pcipcwd_private.io_lock); /* If a command requires data it should be written first. * Data for commands with 8 bits of data should be written to port 4. @@ -148,6 +159,15 @@ static int send_command(int cmd, int *msb, int *lsb) got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; } + if (debug >= DEBUG) { + if (got_response) { + printk(KERN_DEBUG PFX "time to process command was: %d ms\n", + count); + } else { + printk(KERN_DEBUG PFX "card did not respond on command!\n"); + } + } + if (got_response) { /* read back response */ *lsb = inb_p(pcipcwd_private.io_addr + 4); @@ -155,7 +175,12 @@ static int send_command(int cmd, int *msb, int *lsb) /* clear WRSP bit */ inb_p(pcipcwd_private.io_addr + 6); + + if (debug >= DEBUG) + printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n", + cmd, *msb, *lsb); } + spin_unlock(&pcipcwd_private.io_lock); return got_response; @@ -226,6 +251,9 @@ static int pcipcwd_start(void) return -1; } + if (debug >= VERBOSE) + printk(KERN_DEBUG PFX "Watchdog started\n"); + return 0; } @@ -248,6 +276,9 @@ static int pcipcwd_stop(void) return -1; } + if (debug >= VERBOSE) + printk(KERN_DEBUG PFX "Watchdog stopped\n"); + return 0; } @@ -255,6 +286,10 @@ static int pcipcwd_keepalive(void) { /* Re-trigger watchdog by writing to port 0 */ outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */ + + if (debug >= DEBUG) + printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); + return 0; } @@ -270,6 +305,10 @@ static int pcipcwd_set_heartbeat(int t) send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb); heartbeat = t; + if (debug >= VERBOSE) + printk(KERN_DEBUG PFX "New heartbeat: %d\n", + heartbeat); + return 0; } @@ -287,6 +326,10 @@ static int pcipcwd_get_status(int *status) panic(PFX "Temperature overheat trip!\n"); } + if (debug >= DEBUG) + printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n", + control_status); + return 0; } @@ -296,8 +339,17 @@ static int pcipcwd_clear_status(void) int msb; int reset_counter; + if (debug >= VERBOSE) + printk(KERN_INFO PFX "clearing watchdog trip status & LED\n"); + control_status = inb_p(pcipcwd_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_PCI_R2DS) | WD_PCI_WTRP); + } + /* clear trip status & LED and keep mode of relay 2 */ outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1); @@ -306,6 +358,11 @@ static int pcipcwd_clear_status(void) reset_counter=0xff; send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter); + if (debug >= DEBUG) { + printk(KERN_DEBUG PFX "reset count was: 0x%02x\n", + reset_counter); + } + return 0; } @@ -323,6 +380,11 @@ static int pcipcwd_get_temperature(int *temperature) */ *temperature = (*temperature * 9 / 5) + 32; + if (debug >= DEBUG) { + printk(KERN_DEBUG PFX "temperature is: %d F\n", + *temperature); + } + return 0; } @@ -457,6 +519,8 @@ static int pcipcwd_open(struct inode *inode, struct file *file) { /* /dev/watchdog can only be opened once */ if (test_and_set_bit(0, &is_active)) { + if (debug >= VERBOSE) + printk(KERN_ERR PFX "Attempt to open already opened device.\n"); return -EBUSY; } |