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Commit 195331d7 authored by Wim Van Sebroeck's avatar Wim Van Sebroeck
Browse files

[WATCHDOG] pcwd_pci.c add debug module_param 



Add debugging code for the pcwd_pci driver.

Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent a0800f6d

drivers/char/watchdog/pcwd_pci.c

+64 −0
Original line number Diff line number Diff line
@@ -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;

	}