* More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
*/
+#include <linux/config.h> /* For CONFIG_WATCHDOG_NOWAYOUT/... */
#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/fs.h> /* For file operations */
#include <linux/ioport.h> /* For io-port access */
#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
+#include <linux/sched.h> /* TASK_INTERRUPTIBLE, set_current_state() and friends */
+#include <linux/slab.h> /* For kmalloc */
#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
#include <asm/io.h> /* For inb/outb/... */
/* Module and version information */
-#define WATCHDOG_VERSION "1.17"
-#define WATCHDOG_DATE "12 Feb 2006"
+#define WATCHDOG_VERSION "1.16"
+#define WATCHDOG_DATE "03 Jan 2006"
#define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog"
#define WATCHDOG_NAME "pcwd"
#define PFX WATCHDOG_NAME ": "
* PCI-PC Watchdog card.
*/
/* Port 1 : Control Status #1 for the PC Watchdog card, revision A. */
-#define WD_WDRST 0x01 /* Previously reset state */
-#define WD_T110 0x02 /* Temperature overheat sense */
-#define WD_HRTBT 0x04 /* Heartbeat sense */
-#define WD_RLY2 0x08 /* External relay triggered */
-#define WD_SRLY2 0x80 /* Software external relay triggered */
+#define WD_WDRST 0x01 /* Previously reset state */
+#define WD_T110 0x02 /* Temperature overheat sense */
+#define WD_HRTBT 0x04 /* Heartbeat sense */
+#define WD_RLY2 0x08 /* External relay triggered */
+#define WD_SRLY2 0x80 /* Software external relay triggered */
/* Port 1 : Control Status #1 for the PC Watchdog card, revision C. */
-#define WD_REVC_WTRP 0x01 /* Watchdog Trip status */
-#define WD_REVC_HRBT 0x02 /* Watchdog Heartbeat */
-#define WD_REVC_TTRP 0x04 /* Temperature Trip status */
-#define WD_REVC_RL2A 0x08 /* Relay 2 activated by on-board processor */
-#define WD_REVC_RL1A 0x10 /* Relay 1 active */
-#define WD_REVC_R2DS 0x40 /* Relay 2 disable */
-#define WD_REVC_RLY2 0x80 /* Relay 2 activated? */
+#define WD_REVC_WTRP 0x01 /* Watchdog Trip status */
+#define WD_REVC_HRBT 0x02 /* Watchdog Heartbeat */
+#define WD_REVC_TTRP 0x04 /* Temperature Trip status */
/* Port 2 : Control Status #2 */
#define WD_WDIS 0x10 /* Watchdog Disabled */
#define WD_ENTP 0x20 /* Watchdog Enable Temperature Trip */
#define CMD_ISA_VERSION_HUNDRETH 0x03
#define CMD_ISA_VERSION_MINOR 0x04
#define CMD_ISA_SWITCH_SETTINGS 0x05
-#define CMD_ISA_RESET_PC 0x06
-#define CMD_ISA_ARM_0 0x07
-#define CMD_ISA_ARM_30 0x08
-#define CMD_ISA_ARM_60 0x09
#define CMD_ISA_DELAY_TIME_2SECS 0x0A
#define CMD_ISA_DELAY_TIME_4SECS 0x0B
#define CMD_ISA_DELAY_TIME_8SECS 0x0C
-#define CMD_ISA_RESET_RELAYS 0x0D
/*
* We are using an kernel timer to do the pinging of the watchdog
static char expect_close;
static int temp_panic;
static struct { /* this is private data for each ISA-PC watchdog card */
- char fw_ver_str[6]; /* The cards firmware version */
int revision; /* The card's revision */
int supports_temp; /* Wether or not the card has a temperature device */
int command_mode; /* Wether or not the card is in command mode */
} pcwd_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 60 /* 60 sec default heartbeat */
static int heartbeat = WATCHDOG_HEARTBEAT;
module_param(heartbeat, int, 0);
int control_status;
int port0, last_port0; /* Double read for stabilising */
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "sending following data cmd=0x%02x\n",
- cmd);
-
/* The WCMD bit must be 1 and the command is only 4 bits in size */
control_status = (cmd & 0x0F) | WD_WCMD;
outb_p(control_status, pcwd_private.io_addr + 2);
udelay (250);
}
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: port0=0x%02x last_port0=0x%02x\n",
- cmd, port0, last_port0);
-
return port0;
}
spin_unlock(&pcwd_private.io_lock);
pcwd_private.command_mode = found;
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "command_mode=%d\n",
- pcwd_private.command_mode);
-
return(found);
}
spin_unlock(&pcwd_private.io_lock);
pcwd_private.command_mode = 0;
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "command_mode=%d\n",
- pcwd_private.command_mode);
}
static inline void pcwd_check_temperature_support(void)
pcwd_private.supports_temp = 1;
}
-static inline void pcwd_get_firmware(void)
+static inline char *get_firmware(void)
{
int one, ten, hund, minor;
+ char *ret;
- strcpy(pcwd_private.fw_ver_str, "ERROR");
+ ret = kmalloc(6, GFP_KERNEL);
+ if(ret == NULL)
+ return NULL;
if (set_command_mode()) {
one = send_isa_command(CMD_ISA_VERSION_INTEGER);
ten = send_isa_command(CMD_ISA_VERSION_TENTH);
hund = send_isa_command(CMD_ISA_VERSION_HUNDRETH);
minor = send_isa_command(CMD_ISA_VERSION_MINOR);
- sprintf(pcwd_private.fw_ver_str, "%c.%c%c%c", one, ten, hund, minor);
+ sprintf(ret, "%c.%c%c%c", one, ten, hund, minor);
}
- unset_command_mode();
+ else
+ sprintf(ret, "ERROR");
- return;
+ unset_command_mode();
+ return(ret);
}
static inline int pcwd_get_option_switches(void)
static void pcwd_show_card_info(void)
{
+ char *firmware;
int option_switches;
/* Get some extra info from the hardware (in command/debug/diag mode) */
if (pcwd_private.revision == PCWD_REVISION_A)
printk(KERN_INFO PFX "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n", pcwd_private.io_addr);
else if (pcwd_private.revision == PCWD_REVISION_C) {
- pcwd_get_firmware();
+ firmware = get_firmware();
printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n",
- pcwd_private.io_addr, pcwd_private.fw_ver_str);
+ pcwd_private.io_addr, firmware);
+ kfree(firmware);
option_switches = pcwd_get_option_switches();
printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
option_switches,
return -EIO;
}
}
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "Watchdog started\n");
-
return 0;
}
return -EIO;
}
}
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "Watchdog stopped\n");
-
return 0;
}
{
/* user land ping */
pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ);
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
-
return 0;
}
return -EINVAL;
heartbeat = t;
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "New heartbeat: %d\n",
- heartbeat);
-
return 0;
}
static int pcwd_get_status(int *status)
{
- int control_status;
+ int card_status;
*status=0;
spin_lock(&pcwd_private.io_lock);
/* Rev A cards return status information from
* the base register, which is used for the
* temperature in other cards. */
- control_status = inb(pcwd_private.io_addr);
+ card_status = inb(pcwd_private.io_addr);
else {
/* Rev C cards return card status in the base
* address + 1 register. And use different bits
* to indicate a card initiated reset, and an
* over-temperature condition. And the reboot
* status can be reset. */
- control_status = inb(pcwd_private.io_addr + 1);
+ card_status = inb(pcwd_private.io_addr + 1);
}
spin_unlock(&pcwd_private.io_lock);
if (pcwd_private.revision == PCWD_REVISION_A) {
- if (control_status & WD_WDRST)
+ if (card_status & WD_WDRST)
*status |= WDIOF_CARDRESET;
- if (control_status & WD_T110) {
+ if (card_status & WD_T110) {
*status |= WDIOF_OVERHEAT;
if (temp_panic) {
printk (KERN_INFO PFX "Temperature overheat trip!\n");
kernel_power_off();
- /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
}
}
} else {
- if (control_status & WD_REVC_WTRP)
+ if (card_status & WD_REVC_WTRP)
*status |= WDIOF_CARDRESET;
- if (control_status & WD_REVC_TTRP) {
+ if (card_status & WD_REVC_TTRP) {
*status |= WDIOF_OVERHEAT;
if (temp_panic) {
printk (KERN_INFO PFX "Temperature overheat trip!\n");
kernel_power_off();
- /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
}
}
}
static int pcwd_clear_status(void)
{
- int control_status;
-
if (pcwd_private.revision == PCWD_REVISION_C) {
spin_lock(&pcwd_private.io_lock);
-
- if (debug >= VERBOSE)
- printk(KERN_INFO PFX "clearing watchdog trip status\n");
-
- control_status = inb_p(pcwd_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_REVC_R2DS));
- }
-
- /* clear reset status & Keep Relay 2 disable state as it is */
- outb_p((control_status & WD_REVC_R2DS), pcwd_private.io_addr + 1);
-
+ outb_p(0x00, pcwd_private.io_addr + 1); /* clear reset status */
spin_unlock(&pcwd_private.io_lock);
}
return 0;
*temperature = ((inb(pcwd_private.io_addr)) * 9 / 5) + 32;
spin_unlock(&pcwd_private.io_lock);
- if (debug >= DEBUG) {
- printk(KERN_DEBUG PFX "temperature is: %d F\n",
- *temperature);
- }
-
return 0;
}
static int pcwd_open(struct inode *inode, struct file *file)
{
if (!atomic_dec_and_test(&open_allowed) ) {
- if (debug >= VERBOSE)
- printk(KERN_ERR PFX "Attempt to open already opened device.\n");
atomic_inc( &open_allowed );
return -EBUSY;
}
* Kernel Interfaces
*/
-static const struct file_operations pcwd_fops = {
+static struct file_operations pcwd_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = pcwd_write,
.fops = &pcwd_fops,
};
-static const struct file_operations pcwd_temp_fops = {
+static struct file_operations pcwd_temp_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = pcwd_temp_read,
{
if (pcwd_private.io_addr)
pcwatchdog_exit();
-
- printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
+ return;
}
module_init(pcwd_init_module);
git://git.onelab.eu / linux-2.6.git / blobdiff