[WATCHDOG] pcwd.c private data struct patch
authorWim Van Sebroeck <wim@iguana.be>
Mon, 9 Jan 2006 20:53:33 +0000 (21:53 +0100)
committerWim Van Sebroeck <wim@iguana.be>
Sun, 12 Feb 2006 13:46:25 +0000 (14:46 +0100)
more private data of the card to one struct.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
drivers/char/watchdog/pcwd.c

index 3329cbffdb34a5e4d4f67fca91d737404d138702..1112ec8e61f36449d44c593e08cfff544d1533b5 100644 (file)
@@ -73,7 +73,7 @@
 #include <asm/io.h>            /* For inb/outb/... */
 
 /* Module and version information */
-#define WD_VER                  "1.16 (06/12/2004)"
+#define WD_VER                  "1.16 (03/01/2006)"
 #define PFX                    "pcwd: "
 
 /*
@@ -133,15 +133,17 @@ 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 */
+       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 WATCHDOG_HEARTBEAT 60          /* 60 sec default heartbeat */
@@ -165,13 +167,13 @@ static int send_isa_command(int 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);
+       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 */
@@ -187,7 +189,7 @@ 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);
 
@@ -195,15 +197,15 @@ 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;
 
        return(found);
 }
@@ -211,12 +213,12 @@ 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);
 
-       command_mode = 0;
+       pcwd_private.command_mode = 0;
 }
 
 static void pcwd_timer_ping(unsigned long data)
@@ -225,25 +227,25 @@ 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");
        }
@@ -253,18 +255,18 @@ 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);
+               stat_reg = inb_p(pcwd_private.io_addr + 2);
+               spin_unlock(&pcwd_private.io_lock);
                if (stat_reg & 0x10) {
                        printk(KERN_INFO PFX "Could not start watchdog\n");
                        return -EIO;
@@ -278,17 +280,17 @@ 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);
+               stat_reg = inb_p(pcwd_private.io_addr + 2);
+               spin_unlock(&pcwd_private.io_lock);
                if ((stat_reg & 0x10) == 0) {
                        printk(KERN_INFO PFX "Could not stop watchdog\n");
                        return -EIO;
@@ -300,7 +302,7 @@ static int pcwd_stop(void)
 static int pcwd_keepalive(void)
 {
        /* user land ping */
-       next_heartbeat = jiffies + (heartbeat * HZ);
+       pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ);
        return 0;
 }
 
@@ -318,23 +320,23 @@ static int pcwd_get_status(int *status)
        int card_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);
+               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. */
-               card_status = inb(current_readport + 1);
+               card_status = inb(pcwd_private.io_addr + 1);
        }
-       spin_unlock(&io_lock);
+       spin_unlock(&pcwd_private.io_lock);
 
-       if (revision == PCWD_REVISION_A) {
+       if (pcwd_private.revision == PCWD_REVISION_A) {
                if (card_status & WD_WDRST)
                        *status |= WDIOF_CARDRESET;
 
@@ -363,10 +365,10 @@ 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);
+       if (pcwd_private.revision == PCWD_REVISION_C) {
+               spin_lock(&pcwd_private.io_lock);
+               outb_p(0x00, pcwd_private.io_addr + 1); /* clear reset status */
+               spin_unlock(&pcwd_private.io_lock);
        }
        return 0;
 }
@@ -374,20 +376,20 @@ 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);
 
        return 0;
 }
@@ -428,7 +430,7 @@ 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))
@@ -437,7 +439,7 @@ 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;
@@ -553,7 +555,7 @@ 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);
@@ -621,21 +623,21 @@ static struct notifier_block pcwd_notifier = {
 
 static inline void get_support(void)
 {
-       if (inb(current_readport) != 0xF0)
-               supports_temp = 1;
+       if (inb(pcwd_private.io_addr) != 0xF0)
+               pcwd_private.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;
 }
@@ -695,32 +697,32 @@ 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();
@@ -729,12 +731,12 @@ static int __devinit pcwatchdog_init(int base_addr)
        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) {
+       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) {
                firmware = get_firmware();
                printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n",
-                       current_readport, firmware);
+                       pcwd_private.io_addr, 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",
@@ -750,23 +752,23 @@ static int __devinit pcwatchdog_init(int base_addr)
        } 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;
+               release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
+               pcwd_private.io_addr = 0x0000;
                return -1;
        }
 
-       if (supports_temp)
+       if (pcwd_private.supports_temp)
                printk(KERN_INFO PFX "Temperature Option Detected\n");
 
-       if (initial_status & WDIOF_CARDRESET)
+       if (pcwd_private.boot_status & WDIOF_CARDRESET)
                printk(KERN_INFO PFX "Previous reboot was caused by the card\n");
 
-       if (initial_status & WDIOF_OVERHEAT) {
+       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 (initial_status == 0)
+       if (pcwd_private.boot_status == 0)
                printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
 
        /* Check that the heartbeat value is within it's range ; if not reset to the default */
@@ -780,19 +782,19 @@ static int __devinit pcwatchdog_init(int base_addr)
        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;
                }
        }
@@ -801,11 +803,11 @@ 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;
        }
 
@@ -823,11 +825,11 @@ 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--;
 }
 
@@ -891,7 +893,7 @@ 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])) {
@@ -910,7 +912,7 @@ 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;
 }