[WATCHDOG] pcwd_pci.c - get heartbeat from dip switches

The PCWD cards normally use the heartbeat that is set via
the dip-switches of the card. There are only 3 switches,
thus 8 combinations that each have a certain heartbeat.
The card can however be programmed with a heartbeat from
1 till 65535 seconds. This is what our driver does: it
programs the heartbeat on the card.

There are however a lot of people that don't know that
we set the heartbeat of the watchdog card to the value
provided by the heartbeat module parameter. Instead they
think that the heartbeat value is the same as set by the
dip-switches.

This patch changes the driver so that at startup you can
take the heartbeat from the dip-switches. You do this
by setting the heartbeat module parameter to 0. This
patch also makes this the default behaviour.
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/char/watchdog/pcwd_pci.c

 /*
  *	Berkshire PCI-PC Watchdog Card Driver
  *
- *	(c) Copyright 2003-2005 Wim Van Sebroeck <wim@iguana.be>.
+ *	(c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>.
  *
  *	Based on source code of the following authors:
  *	  Ken Hollis <kenji@bitgate.com>,
@@ -51,8 +51,8 @@
 #include <asm/io.h>		/* For inb/outb/... */
 
 /* Module and version information */
-#define WATCHDOG_VERSION "1.02"
-#define WATCHDOG_DATE "03 Sep 2005"
+#define WATCHDOG_VERSION "1.03"
+#define WATCHDOG_DATE "06 Jan 2007"
 #define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
 #define WATCHDOG_NAME "pcwd_pci"
 #define PFX WATCHDOG_NAME ": "
@@ -96,6 +96,18 @@
 #define CMD_WRITE_WATCHDOG_TIMEOUT		0x19
 #define CMD_GET_CLEAR_RESET_COUNT		0x84
 
+/* Watchdog's Dip Switch heartbeat values */
+static const int heartbeat_tbl [] = {
+	5,	/* OFF-OFF-OFF	=  5 Sec  */
+	10,	/* OFF-OFF-ON	= 10 Sec  */
+	30,	/* OFF-ON-OFF	= 30 Sec  */
+	60,	/* OFF-ON-ON	=  1 Min  */
+	300,	/* ON-OFF-OFF	=  5 Min  */
+	600,	/* ON-OFF-ON	= 10 Min  */
+	1800,	/* ON-ON-OFF	= 30 Min  */
+	3600,	/* ON-ON-ON	=  1 hour */
+};
+
 /* We can only use 1 card due to the /dev/watchdog restriction */
 static int cards_found;
 
@@ -119,10 +131,10 @@ 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 */
+#define WATCHDOG_HEARTBEAT 0	/* default heartbeat = delay-time from dip-switches */
 static int heartbeat = WATCHDOG_HEARTBEAT;
 module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
 
 static int nowayout = WATCHDOG_NOWAYOUT;
 module_param(nowayout, int, 0);
@@ -711,6 +723,10 @@ static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
 	/* Show info about the card itself */
 	pcipcwd_show_card_info();
 
+	/* If heartbeat = 0 then we use the heartbeat from the dip-switches */
+	if (heartbeat == 0)
+		heartbeat = heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)];
+
 	/* Check that the heartbeat value is within it's range ; if not reset to the default */
 	if (pcipcwd_set_heartbeat(heartbeat)) {
 		pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT);