X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fchar%2Fwatchdog%2Fpcwd.c;h=6d44ca68312dff82e3ef867a94feedce5e148752;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=592dca1088662cad7cabaaaf7ef984caa5877951;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/drivers/char/watchdog/pcwd.c b/drivers/char/watchdog/pcwd.c index 592dca108..6d44ca683 100644 --- a/drivers/char/watchdog/pcwd.c +++ b/drivers/char/watchdog/pcwd.c @@ -49,29 +49,35 @@ * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/ */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define WD_VER "1.16 (06/12/2004)" -#define PFX "pcwd: " +#include /* For CONFIG_WATCHDOG_NOWAYOUT/... */ +#include /* For module specific items */ +#include /* For new moduleparam's */ +#include /* For standard types (like size_t) */ +#include /* For the -ENODEV/... values */ +#include /* For printk/panic/... */ +#include /* For mdelay function */ +#include /* For timer related operations */ +#include /* For jiffies stuff */ +#include /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ +#include /* For the watchdog specific items */ +#include /* For notifier support */ +#include /* For reboot_notifier stuff */ +#include /* For __init/__exit/... */ +#include /* For file operations */ +#include /* For io-port access */ +#include /* For spin_lock/spin_unlock/... */ + +#include /* For copy_to_user/put_user/... */ +#include /* For inb/outb/... */ + +/* Module and version information */ +#define WATCHDOG_VERSION "1.17" +#define WATCHDOG_DATE "12 Feb 2006" +#define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog" +#define WATCHDOG_NAME "pcwd" +#define PFX WATCHDOG_NAME ": " +#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n" +#define WD_VER WATCHDOG_VERSION " (" WATCHDOG_DATE ")" /* * It should be noted that PCWD_REVISION_B was removed because A and B @@ -85,36 +91,47 @@ /* * These are the defines that describe the control status bits 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 */ - -/* - * These are the defines that describe the control status bits 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 */ + * 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 */ +/* 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? */ +/* Port 2 : Control Status #2 */ +#define WD_WDIS 0x10 /* Watchdog Disabled */ +#define WD_ENTP 0x20 /* Watchdog Enable Temperature Trip */ +#define WD_SSEL 0x40 /* Watchdog Switch Select (1:SW1 <-> 0:SW2) */ +#define WD_WCMD 0x80 /* Watchdog Command Mode */ /* max. time we give an ISA watchdog card to process a command */ /* 500ms for each 4 bit response (according to spec.) */ #define ISA_COMMAND_TIMEOUT 1000 /* Watchdog's internal commands */ -#define CMD_ISA_IDLE 0x00 -#define CMD_ISA_VERSION_INTEGER 0x01 -#define CMD_ISA_VERSION_TENTH 0x02 -#define CMD_ISA_VERSION_HUNDRETH 0x03 -#define CMD_ISA_VERSION_MINOR 0x04 -#define CMD_ISA_SWITCH_SETTINGS 0x05 -#define CMD_ISA_DELAY_TIME_2SECS 0x0A -#define CMD_ISA_DELAY_TIME_4SECS 0x0B -#define CMD_ISA_DELAY_TIME_8SECS 0x0C +#define CMD_ISA_IDLE 0x00 +#define CMD_ISA_VERSION_INTEGER 0x01 +#define CMD_ISA_VERSION_TENTH 0x02 +#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 @@ -130,28 +147,33 @@ static int cards_found; /* internal variables */ static atomic_t open_allowed = ATOMIC_INIT(1); static char expect_close; -static struct timer_list timer; -static unsigned long next_heartbeat; static int temp_panic; -static int revision; /* The card's revision */ -static int supports_temp; /* Wether or not the card has a temperature device */ -static int command_mode; /* Wether or not the card is in command mode */ -static int initial_status; /* The card's boot status */ -static int current_readport; /* The cards I/O address */ -static spinlock_t io_lock; +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 */ + int boot_status; /* The card's boot status */ + int io_addr; /* The cards I/O address */ + spinlock_t io_lock; /* the lock for io operations */ + struct timer_list timer; /* The timer that pings the watchdog */ + unsigned long next_heartbeat; /* the next_heartbeat for the timer */ +} 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); MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<=heartbeat<=7200, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); @@ -165,15 +187,19 @@ static int send_isa_command(int cmd) 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) | 0x80; - outb_p(control_status, current_readport + 2); + control_status = (cmd & 0x0F) | WD_WCMD; + outb_p(control_status, pcwd_private.io_addr + 2); udelay(ISA_COMMAND_TIMEOUT); - port0 = inb_p(current_readport); + port0 = inb_p(pcwd_private.io_addr); for (i = 0; i < 25; ++i) { last_port0 = port0; - port0 = inb_p(current_readport); + port0 = inb_p(pcwd_private.io_addr); if (port0 == last_port0) break; /* Data is stable */ @@ -181,6 +207,10 @@ static int send_isa_command(int cmd) 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; } @@ -189,7 +219,7 @@ static int set_command_mode(void) int i, found=0, count=0; /* Set the card into command mode */ - spin_lock(&io_lock); + spin_lock(&pcwd_private.io_lock); while ((!found) && (count < 3)) { i = send_isa_command(CMD_ISA_IDLE); @@ -197,15 +227,19 @@ static int set_command_mode(void) found = 1; else if (i == 0xF3) { /* Card does not like what we've done to it */ - outb_p(0x00, current_readport + 2); + outb_p(0x00, pcwd_private.io_addr + 2); udelay(1200); /* Spec says wait 1ms */ - outb_p(0x00, current_readport + 2); + outb_p(0x00, pcwd_private.io_addr + 2); udelay(ISA_COMMAND_TIMEOUT); } count++; } - spin_unlock(&io_lock); - command_mode = found; + 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); } @@ -213,12 +247,92 @@ static int set_command_mode(void) static void unset_command_mode(void) { /* Set the card into normal mode */ - spin_lock(&io_lock); - outb_p(0x00, current_readport + 2); + spin_lock(&pcwd_private.io_lock); + outb_p(0x00, pcwd_private.io_addr + 2); udelay(ISA_COMMAND_TIMEOUT); - spin_unlock(&io_lock); + 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) +{ + if (inb(pcwd_private.io_addr) != 0xF0) + pcwd_private.supports_temp = 1; +} + +static inline void pcwd_get_firmware(void) +{ + int one, ten, hund, minor; + + strcpy(pcwd_private.fw_ver_str, "ERROR"); + + 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); + } + unset_command_mode(); + + return; +} + +static inline int pcwd_get_option_switches(void) +{ + int option_switches=0; + + if (set_command_mode()) { + /* Get switch settings */ + option_switches = send_isa_command(CMD_ISA_SWITCH_SETTINGS); + } - command_mode = 0; + unset_command_mode(); + return(option_switches); +} + +static void pcwd_show_card_info(void) +{ + 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(); + 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); + 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, + ((option_switches & 0x10) ? "ON" : "OFF"), + ((option_switches & 0x08) ? "ON" : "OFF")); + + /* Reprogram internal heartbeat to 2 seconds */ + if (set_command_mode()) { + send_isa_command(CMD_ISA_DELAY_TIME_2SECS); + unset_command_mode(); + } + } + + if (pcwd_private.supports_temp) + printk(KERN_INFO PFX "Temperature Option Detected\n"); + + if (pcwd_private.boot_status & WDIOF_CARDRESET) + printk(KERN_INFO PFX "Previous reboot was caused by the card\n"); + + if (pcwd_private.boot_status & WDIOF_OVERHEAT) { + printk(KERN_EMERG PFX "Card senses a CPU Overheat. Panicking!\n"); + printk(KERN_EMERG PFX "CPU Overheat\n"); + } + + if (pcwd_private.boot_status == 0) + printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n"); } static void pcwd_timer_ping(unsigned long data) @@ -227,25 +341,25 @@ static void pcwd_timer_ping(unsigned long data) /* If we got a heartbeat pulse within the WDT_INTERVAL * we agree to ping the WDT */ - if(time_before(jiffies, next_heartbeat)) { + if(time_before(jiffies, pcwd_private.next_heartbeat)) { /* Ping the watchdog */ - spin_lock(&io_lock); - if (revision == PCWD_REVISION_A) { + spin_lock(&pcwd_private.io_lock); + if (pcwd_private.revision == PCWD_REVISION_A) { /* Rev A cards are reset by setting the WD_WDRST bit in register 1 */ - wdrst_stat = inb_p(current_readport); + wdrst_stat = inb_p(pcwd_private.io_addr); wdrst_stat &= 0x0F; wdrst_stat |= WD_WDRST; - outb_p(wdrst_stat, current_readport + 1); + outb_p(wdrst_stat, pcwd_private.io_addr + 1); } else { /* Re-trigger watchdog by writing to port 0 */ - outb_p(0x00, current_readport); + outb_p(0x00, pcwd_private.io_addr); } /* Re-set the timer interval */ - mod_timer(&timer, jiffies + WDT_INTERVAL); + mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL); - spin_unlock(&io_lock); + spin_unlock(&pcwd_private.io_lock); } else { printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n"); } @@ -255,23 +369,27 @@ static int pcwd_start(void) { int stat_reg; - next_heartbeat = jiffies + (heartbeat * HZ); + pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ); /* Start the timer */ - mod_timer(&timer, jiffies + WDT_INTERVAL); + mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL); /* Enable the port */ - if (revision == PCWD_REVISION_C) { - spin_lock(&io_lock); - outb_p(0x00, current_readport + 3); + if (pcwd_private.revision == PCWD_REVISION_C) { + spin_lock(&pcwd_private.io_lock); + outb_p(0x00, pcwd_private.io_addr + 3); udelay(ISA_COMMAND_TIMEOUT); - stat_reg = inb_p(current_readport + 2); - spin_unlock(&io_lock); - if (stat_reg & 0x10) { + stat_reg = inb_p(pcwd_private.io_addr + 2); + spin_unlock(&pcwd_private.io_lock); + if (stat_reg & WD_WDIS) { printk(KERN_INFO PFX "Could not start watchdog\n"); return -EIO; } } + + if (debug >= VERBOSE) + printk(KERN_DEBUG PFX "Watchdog started\n"); + return 0; } @@ -280,29 +398,37 @@ static int pcwd_stop(void) int stat_reg; /* Stop the timer */ - del_timer(&timer); + del_timer(&pcwd_private.timer); /* Disable the board */ - if (revision == PCWD_REVISION_C) { - spin_lock(&io_lock); - outb_p(0xA5, current_readport + 3); + if (pcwd_private.revision == PCWD_REVISION_C) { + spin_lock(&pcwd_private.io_lock); + outb_p(0xA5, pcwd_private.io_addr + 3); udelay(ISA_COMMAND_TIMEOUT); - outb_p(0xA5, current_readport + 3); + outb_p(0xA5, pcwd_private.io_addr + 3); udelay(ISA_COMMAND_TIMEOUT); - stat_reg = inb_p(current_readport + 2); - spin_unlock(&io_lock); - if ((stat_reg & 0x10) == 0) { + stat_reg = inb_p(pcwd_private.io_addr + 2); + spin_unlock(&pcwd_private.io_lock); + if ((stat_reg & WD_WDIS) == 0) { printk(KERN_INFO PFX "Could not stop watchdog\n"); return -EIO; } } + + if (debug >= VERBOSE) + printk(KERN_DEBUG PFX "Watchdog stopped\n"); + return 0; } static int pcwd_keepalive(void) { /* user land ping */ - next_heartbeat = jiffies + (heartbeat * HZ); + pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ); + + if (debug >= DEBUG) + printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); + return 0; } @@ -312,50 +438,57 @@ static int pcwd_set_heartbeat(int t) 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 card_status; + int control_status; *status=0; - spin_lock(&io_lock); - if (revision == PCWD_REVISION_A) + spin_lock(&pcwd_private.io_lock); + if (pcwd_private.revision == PCWD_REVISION_A) /* Rev A cards return status information from * the base register, which is used for the * temperature in other cards. */ - card_status = inb(current_readport); + control_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. */ - card_status = inb(current_readport + 1); + control_status = inb(pcwd_private.io_addr + 1); } - spin_unlock(&io_lock); + spin_unlock(&pcwd_private.io_lock); - if (revision == PCWD_REVISION_A) { - if (card_status & WD_WDRST) + if (pcwd_private.revision == PCWD_REVISION_A) { + if (control_status & WD_WDRST) *status |= WDIOF_CARDRESET; - if (card_status & WD_T110) { + if (control_status & WD_T110) { *status |= WDIOF_OVERHEAT; if (temp_panic) { printk (KERN_INFO PFX "Temperature overheat trip!\n"); - machine_power_off(); + kernel_power_off(); + /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */ } } } else { - if (card_status & WD_REVC_WTRP) + if (control_status & WD_REVC_WTRP) *status |= WDIOF_CARDRESET; - if (card_status & WD_REVC_TTRP) { + if (control_status & WD_REVC_TTRP) { *status |= WDIOF_OVERHEAT; if (temp_panic) { printk (KERN_INFO PFX "Temperature overheat trip!\n"); - machine_power_off(); + kernel_power_off(); + /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */ } } } @@ -365,10 +498,26 @@ static int pcwd_get_status(int *status) static int pcwd_clear_status(void) { - if (revision == PCWD_REVISION_C) { - spin_lock(&io_lock); - outb_p(0x00, current_readport + 1); /* clear reset status */ - spin_unlock(&io_lock); + 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); + + spin_unlock(&pcwd_private.io_lock); } return 0; } @@ -376,20 +525,25 @@ static int pcwd_clear_status(void) static int pcwd_get_temperature(int *temperature) { /* check that port 0 gives temperature info and no command results */ - if (command_mode) + if (pcwd_private.command_mode) return -1; *temperature = 0; - if (!supports_temp) + if (!pcwd_private.supports_temp) return -ENODEV; /* * Convert celsius to fahrenheit, since this was * the decided 'standard' for this return value. */ - spin_lock(&io_lock); - *temperature = ((inb(current_readport)) * 9 / 5) + 32; - spin_unlock(&io_lock); + spin_lock(&pcwd_private.io_lock); + *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; } @@ -430,7 +584,7 @@ static int pcwd_ioctl(struct inode *inode, struct file *file, return put_user(status, argp); case WDIOC_GETBOOTSTATUS: - return put_user(initial_status, argp); + return put_user(pcwd_private.boot_status, argp); case WDIOC_GETTEMP: if (pcwd_get_temperature(&temperature)) @@ -439,7 +593,7 @@ static int pcwd_ioctl(struct inode *inode, struct file *file, return put_user(temperature, argp); case WDIOC_SETOPTIONS: - if (revision == PCWD_REVISION_C) + if (pcwd_private.revision == PCWD_REVISION_C) { if(copy_from_user(&rv, argp, sizeof(int))) return -EFAULT; @@ -509,6 +663,8 @@ static ssize_t pcwd_write(struct file *file, const char __user *buf, size_t len, 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; } @@ -555,7 +711,7 @@ static ssize_t pcwd_temp_read(struct file *file, char __user *buf, size_t count, static int pcwd_temp_open(struct inode *inode, struct file *file) { - if (!supports_temp) + if (!pcwd_private.supports_temp) return -ENODEV; return nonseekable_open(inode, file); @@ -621,68 +777,24 @@ static struct notifier_block pcwd_notifier = { * Init & exit routines */ -static inline void get_support(void) -{ - if (inb(current_readport) != 0xF0) - supports_temp = 1; -} - static inline int get_revision(void) { int r = PCWD_REVISION_C; - spin_lock(&io_lock); + spin_lock(&pcwd_private.io_lock); /* REV A cards use only 2 io ports; test * presumes a floating bus reads as 0xff. */ - if ((inb(current_readport + 2) == 0xFF) || - (inb(current_readport + 3) == 0xFF)) + if ((inb(pcwd_private.io_addr + 2) == 0xFF) || + (inb(pcwd_private.io_addr + 3) == 0xFF)) r=PCWD_REVISION_A; - spin_unlock(&io_lock); + spin_unlock(&pcwd_private.io_lock); return r; } -static inline char *get_firmware(void) -{ - int one, ten, hund, minor; - char *ret; - - 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(ret, "%c.%c%c%c", one, ten, hund, minor); - } - else - sprintf(ret, "ERROR"); - - unset_command_mode(); - return(ret); -} - -static inline int get_option_switches(void) -{ - int rv=0; - - if (set_command_mode()) { - /* Get switch settings */ - rv = send_isa_command(CMD_ISA_SWITCH_SETTINGS); - } - - unset_command_mode(); - return(rv); -} - static int __devinit pcwatchdog_init(int base_addr) { int ret; - char *firmware; - int option_switches; cards_found++; if (cards_found == 1) @@ -697,104 +809,66 @@ static int __devinit pcwatchdog_init(int base_addr) printk(KERN_ERR PFX "No I/O-Address for card detected\n"); return -ENODEV; } - current_readport = base_addr; + pcwd_private.io_addr = base_addr; /* Check card's revision */ - revision = get_revision(); + pcwd_private.revision = get_revision(); - if (!request_region(current_readport, (revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) { + if (!request_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) { printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", - current_readport); - current_readport = 0x0000; + pcwd_private.io_addr); + pcwd_private.io_addr = 0x0000; return -EIO; } /* Initial variables */ - supports_temp = 0; + pcwd_private.supports_temp = 0; temp_panic = 0; - initial_status = 0x0000; + pcwd_private.boot_status = 0x0000; /* get the boot_status */ - pcwd_get_status(&initial_status); + pcwd_get_status(&pcwd_private.boot_status); /* clear the "card caused reboot" flag */ pcwd_clear_status(); - init_timer(&timer); - timer.function = pcwd_timer_ping; - timer.data = 0; + init_timer(&pcwd_private.timer); + pcwd_private.timer.function = pcwd_timer_ping; + pcwd_private.timer.data = 0; /* Disable the board */ pcwd_stop(); /* Check whether or not the card supports the temperature device */ - get_support(); - - /* Get some extra info from the hardware (in command/debug/diag mode) */ - if (revision == PCWD_REVISION_A) - printk(KERN_INFO PFX "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n", current_readport); - else if (revision == PCWD_REVISION_C) { - firmware = get_firmware(); - printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n", - current_readport, firmware); - kfree(firmware); - option_switches = get_option_switches(); - printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n", - option_switches, - ((option_switches & 0x10) ? "ON" : "OFF"), - ((option_switches & 0x08) ? "ON" : "OFF")); - - /* Reprogram internal heartbeat to 2 seconds */ - if (set_command_mode()) { - send_isa_command(CMD_ISA_DELAY_TIME_2SECS); - unset_command_mode(); - } - } else { - /* Should NEVER happen, unless get_revision() fails. */ - printk(KERN_INFO PFX "Unable to get revision\n"); - release_region(current_readport, (revision == PCWD_REVISION_A) ? 2 : 4); - current_readport = 0x0000; - return -1; - } - - if (supports_temp) - printk(KERN_INFO PFX "Temperature Option Detected\n"); + pcwd_check_temperature_support(); - if (initial_status & WDIOF_CARDRESET) - printk(KERN_INFO PFX "Previous reboot was caused by the card\n"); - - if (initial_status & WDIOF_OVERHEAT) { - printk(KERN_EMERG PFX "Card senses a CPU Overheat. Panicking!\n"); - printk(KERN_EMERG PFX "CPU Overheat\n"); - } - - if (initial_status == 0) - printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n"); + /* Show info about the card itself */ + pcwd_show_card_info(); /* Check that the heartbeat value is within it's range ; if not reset to the default */ - if (pcwd_set_heartbeat(heartbeat)) { - pcwd_set_heartbeat(WATCHDOG_HEARTBEAT); - printk(KERN_INFO PFX "heartbeat value must be 2<=heartbeat<=7200, using %d\n", - WATCHDOG_HEARTBEAT); + if (pcwd_set_heartbeat(heartbeat)) { + pcwd_set_heartbeat(WATCHDOG_HEARTBEAT); + printk(KERN_INFO PFX "heartbeat value must be 2<=heartbeat<=7200, using %d\n", + WATCHDOG_HEARTBEAT); } ret = register_reboot_notifier(&pcwd_notifier); if (ret) { printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret); - release_region(current_readport, (revision == PCWD_REVISION_A) ? 2 : 4); - current_readport = 0x0000; + release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); + pcwd_private.io_addr = 0x0000; return ret; } - if (supports_temp) { + if (pcwd_private.supports_temp) { ret = misc_register(&temp_miscdev); if (ret) { printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", TEMP_MINOR, ret); unregister_reboot_notifier(&pcwd_notifier); - release_region(current_readport, (revision == PCWD_REVISION_A) ? 2 : 4); - current_readport = 0x0000; + release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); + pcwd_private.io_addr = 0x0000; return ret; } } @@ -803,11 +877,11 @@ static int __devinit pcwatchdog_init(int base_addr) if (ret) { printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", WATCHDOG_MINOR, ret); - if (supports_temp) + if (pcwd_private.supports_temp) misc_deregister(&temp_miscdev); unregister_reboot_notifier(&pcwd_notifier); - release_region(current_readport, (revision == PCWD_REVISION_A) ? 2 : 4); - current_readport = 0x0000; + release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); + pcwd_private.io_addr = 0x0000; return ret; } @@ -825,11 +899,12 @@ static void __devexit pcwatchdog_exit(void) /* Deregister */ misc_deregister(&pcwd_miscdev); - if (supports_temp) + if (pcwd_private.supports_temp) misc_deregister(&temp_miscdev); unregister_reboot_notifier(&pcwd_notifier); - release_region(current_readport, (revision == PCWD_REVISION_A) ? 2 : 4); - current_readport = 0x0000; + release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); + pcwd_private.io_addr = 0x0000; + cards_found--; } /* @@ -892,7 +967,7 @@ static int __init pcwd_init_module(void) { int i, found = 0; - spin_lock_init(&io_lock); + spin_lock_init(&pcwd_private.io_lock); for (i = 0; pcwd_ioports[i] != 0; i++) { if (pcwd_checkcard(pcwd_ioports[i])) { @@ -911,9 +986,10 @@ static int __init pcwd_init_module(void) static void __exit pcwd_cleanup_module(void) { - if (current_readport) + if (pcwd_private.io_addr) pcwatchdog_exit(); - return; + + printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); } module_init(pcwd_init_module);