Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog

1 files changed, 172 insertions, 67 deletions

diff --git a/drivers/char/watchdog/pcwd_pci.c b/drivers/char/watchdog/pcwd_pci.c
index 5a80adbf8032..0b8e493be045 100644
--- a/drivers/char/watchdog/pcwd_pci.c
+++ b/drivers/char/watchdog/pcwd_pci.c
@@ -50,8 +50,8 @@
 #include <asm/io.h>             /* For inb/outb/... */
 
 /* Module and version information */
-#define WATCHDOG_VERSION "1.01"
-#define WATCHDOG_DATE "02 Sep 2005"
+#define WATCHDOG_VERSION "1.02"
+#define WATCHDOG_DATE "03 Sep 2005"
 #define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
 #define WATCHDOG_NAME "pcwd_pci"
 #define PFX WATCHDOG_NAME ": "
@@ -70,19 +70,30 @@
  * These are the defines that describe the control status bits for the
  * PCI-PC Watchdog card.
  */
-#define WD_PCI_WTRP             0x01    /* Watchdog Trip status */
-#define WD_PCI_HRBT             0x02    /* Watchdog Heartbeat */
-#define WD_PCI_TTRP             0x04    /* Temperature Trip status */
+/* Port 1 : Control Status #1 */
+#define WD_PCI_WTRP             0x01    /* Watchdog Trip status */
+#define WD_PCI_HRBT             0x02    /* Watchdog Heartbeat */
+#define WD_PCI_TTRP             0x04    /* Temperature Trip status */
+#define WD_PCI_RL2A             0x08    /* Relay 2 Active */
+#define WD_PCI_RL1A             0x10    /* Relay 1 Active */
+#define WD_PCI_R2DS             0x40    /* Relay 2 Disable Temperature-trip/reset */
+#define WD_PCI_RLY2             0x80    /* Activate Relay 2 on the board */
+/* Port 2 : Control Status #2 */
+#define WD_PCI_WDIS             0x10    /* Watchdog Disable */
+#define WD_PCI_ENTP             0x20    /* Enable Temperature Trip Reset */
+#define WD_PCI_WRSP             0x40    /* Watchdog wrote response */
+#define WD_PCI_PCMD             0x80    /* PC has sent command */
 
 /* according to documentation max. time to process a command for the pci
  * watchdog card is 100 ms, so we give it 150 ms to do it's job */
 #define PCI_COMMAND_TIMEOUT     150
 
 /* Watchdog's internal commands */
-#define CMD_GET_STATUS                  0x04
-#define CMD_GET_FIRMWARE_VERSION        0x08
-#define CMD_READ_WATCHDOG_TIMEOUT       0x18
-#define CMD_WRITE_WATCHDOG_TIMEOUT      0x19
+#define CMD_GET_STATUS                          0x04
+#define CMD_GET_FIRMWARE_VERSION                0x08
+#define CMD_READ_WATCHDOG_TIMEOUT               0x18
+#define CMD_WRITE_WATCHDOG_TIMEOUT              0x19
+#define CMD_GET_CLEAR_RESET_COUNT               0x84
 
 /* We can only use 1 card due to the /dev/watchdog restriction */
 static int cards_found;
@@ -91,15 +102,22 @@ static int cards_found;
 static int temp_panic;
 static unsigned long is_active;
 static char expect_release;
-static struct {
-        int supports_temp;      /* Wether or not the card has a temperature device */
-        int boot_status;        /* The card's boot status */
-        unsigned long io_addr;  /* The cards I/O address */
-        spinlock_t io_lock;
-        struct pci_dev *pdev;
+static struct {                         /* this is private data for each PCI-PC watchdog card */
+        int supports_temp;              /* Wether or not the card has a temperature device */
+        int boot_status;                /* The card's boot status */
+        unsigned long io_addr;          /* The cards I/O address */
+        spinlock_t io_lock;             /* the lock for io operations */
+        struct pci_dev *pdev;           /* the PCI-device */
 } pcipcwd_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 2    /* 2 sec default heartbeat */
 static int heartbeat = WATCHDOG_HEARTBEAT;
 module_param(heartbeat, int, 0);
@@ -117,6 +135,10 @@ static int send_command(int cmd, int *msb, int *lsb)
 {
         int got_response, count;
 
+        if (debug >= DEBUG)
+                printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
+                cmd, *msb, *lsb);
+
         spin_lock(&pcipcwd_private.io_lock);
         /* If a command requires data it should be written first.
          * Data for commands with 8 bits of data should be written to port 4.
@@ -131,10 +153,19 @@ static int send_command(int cmd, int *msb, int *lsb)
         /* wait till the pci card processed the command, signaled by
          * the WRSP bit in port 2 and give it a max. timeout of
          * PCI_COMMAND_TIMEOUT to process */
-        got_response = inb_p(pcipcwd_private.io_addr + 2) & 0x40;
+        got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
         for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) {
                 mdelay(1);
-                got_response = inb_p(pcipcwd_private.io_addr + 2) & 0x40;
+                got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
+        }
+
+        if (debug >= DEBUG) {
+                if (got_response) {
+                        printk(KERN_DEBUG PFX "time to process command was: %d ms\n",
+                                count);
+                } else {
+                        printk(KERN_DEBUG PFX "card did not respond on command!\n");
+                }
         }
 
         if (got_response) {
@@ -144,12 +175,66 @@ static int send_command(int cmd, int *msb, int *lsb)
 
                 /* clear WRSP bit */
                 inb_p(pcipcwd_private.io_addr + 6);
+
+                if (debug >= DEBUG)
+                        printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
+                                cmd, *msb, *lsb);
         }
+
         spin_unlock(&pcipcwd_private.io_lock);
 
         return got_response;
 }
 
+static inline void pcipcwd_check_temperature_support(void)
+{
+        if (inb_p(pcipcwd_private.io_addr) != 0xF0)
+                pcipcwd_private.supports_temp = 1;
+}
+
+static int pcipcwd_get_option_switches(void)
+{
+        int option_switches;
+
+        option_switches = inb_p(pcipcwd_private.io_addr + 3);
+        return option_switches;
+}
+
+static void pcipcwd_show_card_info(void)
+{
+        int got_fw_rev, fw_rev_major, fw_rev_minor;
+        char fw_ver_str[20];            /* The cards firmware version */
+        int option_switches;
+
+        got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
+        if (got_fw_rev) {
+                sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
+        } else {
+                sprintf(fw_ver_str, "<card no answer>");
+        }
+
+        /* Get switch settings */
+        option_switches = pcipcwd_get_option_switches();
+
+        printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
+                (int) pcipcwd_private.io_addr, fw_ver_str,
+                (pcipcwd_private.supports_temp ? "with" : "without"));
+
+        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"));
+
+        if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
+                printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
+
+        if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
+                printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
+
+        if (pcipcwd_private.boot_status == 0)
+                printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
+}
+
 static int pcipcwd_start(void)
 {
         int stat_reg;
@@ -161,11 +246,14 @@ static int pcipcwd_start(void)
         stat_reg = inb_p(pcipcwd_private.io_addr + 2);
         spin_unlock(&pcipcwd_private.io_lock);
 
-        if (stat_reg & 0x10) {
+        if (stat_reg & WD_PCI_WDIS) {
                 printk(KERN_ERR PFX "Card timer not enabled\n");
                 return -1;
         }
 
+        if (debug >= VERBOSE)
+                printk(KERN_DEBUG PFX "Watchdog started\n");
+
         return 0;
 }
 
@@ -183,18 +271,25 @@ static int pcipcwd_stop(void)
         stat_reg = inb_p(pcipcwd_private.io_addr + 2);
         spin_unlock(&pcipcwd_private.io_lock);
 
-        if (!(stat_reg & 0x10)) {
+        if (!(stat_reg & WD_PCI_WDIS)) {
                 printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
                 return -1;
         }
 
+        if (debug >= VERBOSE)
+                printk(KERN_DEBUG PFX "Watchdog stopped\n");
+
         return 0;
 }
 
 static int pcipcwd_keepalive(void)
 {
         /* Re-trigger watchdog by writing to port 0 */
-        outb_p(0x42, pcipcwd_private.io_addr);
+        outb_p(0x42, pcipcwd_private.io_addr);  /* send out any data */
+
+        if (debug >= DEBUG)
+                printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
+
         return 0;
 }
 
@@ -210,29 +305,64 @@ static int pcipcwd_set_heartbeat(int t)
         send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
 
         heartbeat = t;
+        if (debug >= VERBOSE)
+                printk(KERN_DEBUG PFX "New heartbeat: %d\n",
+                       heartbeat);
+
         return 0;
 }
 
 static int pcipcwd_get_status(int *status)
 {
-        int new_status;
+        int control_status;
 
         *status=0;
-        new_status = inb_p(pcipcwd_private.io_addr + 1);
-        if (new_status & WD_PCI_WTRP)
+        control_status = inb_p(pcipcwd_private.io_addr + 1);
+        if (control_status & WD_PCI_WTRP)
                 *status |= WDIOF_CARDRESET;
-        if (new_status & WD_PCI_TTRP) {
+        if (control_status & WD_PCI_TTRP) {
                 *status |= WDIOF_OVERHEAT;
                 if (temp_panic)
                         panic(PFX "Temperature overheat trip!\n");
         }
 
+        if (debug >= DEBUG)
+                printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n",
+                       control_status);
+
         return 0;
 }
 
 static int pcipcwd_clear_status(void)
 {
-        outb_p(0x01, pcipcwd_private.io_addr + 1);
+        int control_status;
+        int msb;
+        int reset_counter;
+
+        if (debug >= VERBOSE)
+                printk(KERN_INFO PFX "clearing watchdog trip status & LED\n");
+
+        control_status = inb_p(pcipcwd_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_PCI_R2DS) | WD_PCI_WTRP);
+        }
+
+        /* clear trip status & LED and keep mode of relay 2 */
+        outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1);
+
+        /* clear reset counter */
+        msb=0;
+        reset_counter=0xff;
+        send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
+
+        if (debug >= DEBUG) {
+                printk(KERN_DEBUG PFX "reset count was: 0x%02x\n",
+                       reset_counter);
+        }
+
         return 0;
 }
 
@@ -242,11 +372,18 @@ static int pcipcwd_get_temperature(int *temperature)
         if (!pcipcwd_private.supports_temp)
                 return -ENODEV;
 
+        *temperature = inb_p(pcipcwd_private.io_addr);
+
         /*
          * Convert celsius to fahrenheit, since this was
          * the decided 'standard' for this return value.
          */
-        *temperature = ((inb_p(pcipcwd_private.io_addr)) * 9 / 5) + 32;
+        *temperature = (*temperature * 9 / 5) + 32;
+
+        if (debug >= DEBUG) {
+                printk(KERN_DEBUG PFX "temperature is: %d F\n",
+                       *temperature);
+        }
 
         return 0;
 }
@@ -256,7 +393,7 @@ static int pcipcwd_get_temperature(int *temperature)
  */
 
 static ssize_t pcipcwd_write(struct file *file, const char __user *data,
-                              size_t len, loff_t *ppos)
+                             size_t len, loff_t *ppos)
 {
         /* See if we got the magic character 'V' and reload the timer */
         if (len) {
@@ -381,8 +518,11 @@ static int pcipcwd_ioctl(struct inode *inode, struct file *file,
 static int pcipcwd_open(struct inode *inode, struct file *file)
 {
         /* /dev/watchdog can only be opened once */
-        if (test_and_set_bit(0, &is_active))
+        if (test_and_set_bit(0, &is_active)) {
+                if (debug >= VERBOSE)
+                        printk(KERN_ERR PFX "Attempt to open already opened device.\n");
                 return -EBUSY;
+        }
 
         /* Activate */
         pcipcwd_start();
@@ -492,19 +632,10 @@ static struct notifier_block pcipcwd_notifier = {
  *      Init & exit routines
  */
 
-static inline void check_temperature_support(void)
-{
-        if (inb_p(pcipcwd_private.io_addr) != 0xF0)
-                pcipcwd_private.supports_temp = 1;
-}
-
 static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
                 const struct pci_device_id *ent)
 {
         int ret = -EIO;
-        int got_fw_rev, fw_rev_major, fw_rev_minor;
-        char fw_ver_str[20];
-        char option_switches;
 
         cards_found++;
         if (cards_found == 1)
@@ -546,36 +677,10 @@ static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
         pcipcwd_stop();
 
         /* Check whether or not the card supports the temperature device */
-        check_temperature_support();
-
-        /* Get the Firmware Version */
-        got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
-        if (got_fw_rev) {
-                sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
-        } else {
-                sprintf(fw_ver_str, "<card no answer>");
-        }
+        pcipcwd_check_temperature_support();
 
-        /* Get switch settings */
-        option_switches = inb_p(pcipcwd_private.io_addr + 3);
-
-        printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
-                (int) pcipcwd_private.io_addr, fw_ver_str,
-                (pcipcwd_private.supports_temp ? "with" : "without"));
-
-        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"));
-
-        if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
-                printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
-
-        if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
-                printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
-
-        if (pcipcwd_private.boot_status == 0)
-                printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
+        /* Show info about the card itself */
+        pcipcwd_show_card_info();
 
         /* Check that the heartbeat value is within it's range ; if not reset to the default */
         if (pcipcwd_set_heartbeat(heartbeat)) {
@@ -656,7 +761,7 @@ static struct pci_driver pcipcwd_driver = {
 
 static int __init pcipcwd_init_module(void)
 {
-        spin_lock_init (&pcipcwd_private.io_lock);
+        spin_lock_init(&pcipcwd_private.io_lock);
 
         return pci_register_driver(&pcipcwd_driver);
 }