[WATCHDOG] pcwd_pci.c add debug module_param
Add debugging code for the pcwd_pci driver. Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Wim Van Sebroeck
Родитель
a0800f6da7
Коммит
195331d7c9
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@ -111,6 +111,13 @@ static struct { /* this is private data for each PCI-PC watchdog card */
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} pcipcwd_private;
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/* module parameters */
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#define QUIET 0 /* Default */
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#define VERBOSE 1 /* Verbose */
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#define DEBUG 2 /* print fancy stuff too */
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static int debug = QUIET;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
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#define WATCHDOG_HEARTBEAT 2 /* 2 sec default heartbeat */
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static int heartbeat = WATCHDOG_HEARTBEAT;
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module_param(heartbeat, int, 0);
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@ -128,6 +135,10 @@ static int send_command(int cmd, int *msb, int *lsb)
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{
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int got_response, count;
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if (debug >= DEBUG)
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printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
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cmd, *msb, *lsb);
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spin_lock(&pcipcwd_private.io_lock);
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/* If a command requires data it should be written first.
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* Data for commands with 8 bits of data should be written to port 4.
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@ -148,6 +159,15 @@ static int send_command(int cmd, int *msb, int *lsb)
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got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
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}
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if (debug >= DEBUG) {
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if (got_response) {
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printk(KERN_DEBUG PFX "time to process command was: %d ms\n",
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count);
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} else {
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printk(KERN_DEBUG PFX "card did not respond on command!\n");
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}
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}
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if (got_response) {
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/* read back response */
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*lsb = inb_p(pcipcwd_private.io_addr + 4);
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@ -155,7 +175,12 @@ static int send_command(int cmd, int *msb, int *lsb)
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/* clear WRSP bit */
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inb_p(pcipcwd_private.io_addr + 6);
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if (debug >= DEBUG)
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printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
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cmd, *msb, *lsb);
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}
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spin_unlock(&pcipcwd_private.io_lock);
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return got_response;
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@ -226,6 +251,9 @@ static int pcipcwd_start(void)
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return -1;
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}
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if (debug >= VERBOSE)
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printk(KERN_DEBUG PFX "Watchdog started\n");
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return 0;
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}
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@ -248,6 +276,9 @@ static int pcipcwd_stop(void)
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return -1;
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}
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if (debug >= VERBOSE)
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printk(KERN_DEBUG PFX "Watchdog stopped\n");
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return 0;
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}
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@ -255,6 +286,10 @@ static int pcipcwd_keepalive(void)
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{
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/* Re-trigger watchdog by writing to port 0 */
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outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */
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if (debug >= DEBUG)
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printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
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return 0;
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}
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@ -270,6 +305,10 @@ static int pcipcwd_set_heartbeat(int t)
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send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
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heartbeat = t;
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if (debug >= VERBOSE)
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printk(KERN_DEBUG PFX "New heartbeat: %d\n",
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heartbeat);
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return 0;
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}
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@ -287,6 +326,10 @@ static int pcipcwd_get_status(int *status)
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panic(PFX "Temperature overheat trip!\n");
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}
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if (debug >= DEBUG)
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printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n",
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control_status);
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return 0;
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}
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@ -296,8 +339,17 @@ static int pcipcwd_clear_status(void)
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int msb;
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int reset_counter;
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if (debug >= VERBOSE)
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printk(KERN_INFO PFX "clearing watchdog trip status & LED\n");
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control_status = inb_p(pcipcwd_private.io_addr + 1);
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if (debug >= DEBUG) {
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printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
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printk(KERN_DEBUG PFX "sending: 0x%02x\n",
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(control_status & WD_PCI_R2DS) | WD_PCI_WTRP);
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}
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/* clear trip status & LED and keep mode of relay 2 */
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outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1);
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@ -306,6 +358,11 @@ static int pcipcwd_clear_status(void)
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reset_counter=0xff;
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send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
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if (debug >= DEBUG) {
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printk(KERN_DEBUG PFX "reset count was: 0x%02x\n",
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reset_counter);
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}
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return 0;
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}
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@ -323,6 +380,11 @@ static int pcipcwd_get_temperature(int *temperature)
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*/
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*temperature = (*temperature * 9 / 5) + 32;
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if (debug >= DEBUG) {
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printk(KERN_DEBUG PFX "temperature is: %d F\n",
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*temperature);
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}
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return 0;
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}
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@ -457,6 +519,8 @@ static int pcipcwd_open(struct inode *inode, struct file *file)
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{
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/* /dev/watchdog can only be opened once */
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if (test_and_set_bit(0, &is_active)) {
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if (debug >= VERBOSE)
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printk(KERN_ERR PFX "Attempt to open already opened device.\n");
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return -EBUSY;
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}
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