/*
* Berkshire USB-PC Watchdog Card Driver
*
- * (c) Copyright 2004 Wim Van Sebroeck <wim@iguana.be>.
+ * (c) Copyright 2004-2007 Wim Van Sebroeck <wim@iguana.be>.
*
* Based on source code of the following authors:
* Ken Hollis <kenji@bitgate.com>,
* http://www.berkprod.com/ or http://www.pcwatchdog.com/
*/
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/delay.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/fs.h>
-#include <linux/smp_lock.h>
-#include <linux/completion.h>
-#include <asm/uaccess.h>
-#include <linux/usb.h>
-#include <linux/mutex.h>
+#include <linux/module.h> /* For module specific items */
+#include <linux/moduleparam.h> /* For new moduleparam's */
+#include <linux/types.h> /* For standard types (like size_t) */
+#include <linux/errno.h> /* For the -ENODEV/... values */
+#include <linux/kernel.h> /* For printk/panic/... */
+#include <linux/delay.h> /* For mdelay function */
+#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
+#include <linux/watchdog.h> /* For the watchdog specific items */
+#include <linux/notifier.h> /* For notifier support */
+#include <linux/reboot.h> /* For reboot_notifier stuff */
+#include <linux/init.h> /* For __init/__exit/... */
+#include <linux/fs.h> /* For file operations */
+#include <linux/usb.h> /* For USB functions */
+#include <linux/slab.h> /* For kmalloc, ... */
+#include <linux/mutex.h> /* For mutex locking */
#include <linux/hid.h> /* For HID_REQ_SET_REPORT & HID_DT_REPORT */
+#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
+
#ifdef CONFIG_USB_DEBUG
static int debug = 1;
/* Module and Version Information */
-#define DRIVER_VERSION "1.01"
-#define DRIVER_DATE "15 Mar 2005"
+#define DRIVER_VERSION "1.02"
+#define DRIVER_DATE "21 Jan 2007"
#define DRIVER_AUTHOR "Wim Van Sebroeck <wim@iguana.be>"
#define DRIVER_DESC "Berkshire USB-PC Watchdog driver"
#define DRIVER_LICENSE "GPL"
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug enabled or not");
-#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);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/* The vendor and product id's for the USB-PC Watchdog card */
#define USB_PCWD_VENDOR_ID 0x0c98
#define CMD_ENABLE_WATCHDOG 0x30 /* Enable / Disable Watchdog */
#define CMD_DISABLE_WATCHDOG CMD_ENABLE_WATCHDOG
+/* 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;
atomic_t cmd_received; /* true if we received a report after a command */
int exists; /* Wether or not the device exists */
- struct semaphore sem; /* locks this structure */
+ struct mutex mtx; /* locks this structure */
};
static struct usb_pcwd_private *usb_pcwd_device;
maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
/* allocate memory for our device and initialize it */
- usb_pcwd = kmalloc (sizeof(struct usb_pcwd_private), GFP_KERNEL);
+ usb_pcwd = kzalloc (sizeof(struct usb_pcwd_private), GFP_KERNEL);
if (usb_pcwd == NULL) {
printk(KERN_ERR PFX "Out of memory\n");
goto error;
}
- memset (usb_pcwd, 0x00, sizeof (*usb_pcwd));
usb_pcwd_device = usb_pcwd;
- init_MUTEX (&usb_pcwd->sem);
+ mutex_init(&usb_pcwd->mtx);
usb_pcwd->udev = udev;
usb_pcwd->interface = interface;
usb_pcwd->interface_number = iface_desc->desc.bInterfaceNumber;
((option_switches & 0x10) ? "ON" : "OFF"),
((option_switches & 0x08) ? "ON" : "OFF"));
+ /* If heartbeat = 0 then we use the heartbeat from the dip-switches */
+ if (heartbeat == 0)
+ heartbeat = heartbeat_tbl[(option_switches & 0x07)];
+
/* Check that the heartbeat value is within it's range ; if not reset to the default */
if (usb_pcwd_set_heartbeat(usb_pcwd, heartbeat)) {
usb_pcwd_set_heartbeat(usb_pcwd, WATCHDOG_HEARTBEAT);
usb_pcwd = usb_get_intfdata (interface);
usb_set_intfdata (interface, NULL);
- down (&usb_pcwd->sem);
+ mutex_lock(&usb_pcwd->mtx);
/* Stop the timer before we leave */
if (!nowayout)
misc_deregister(&usb_pcwd_temperature_miscdev);
unregister_reboot_notifier(&usb_pcwd_notifier);
- up (&usb_pcwd->sem);
+ mutex_unlock(&usb_pcwd->mtx);
/* Delete the USB PCWD device */
usb_pcwd_delete(usb_pcwd);
git.openpandora.org / pandora-kernel.git / blobdiff