diff options
Diffstat (limited to 'drivers/watchdog/pcwd_pci.c')
| -rw-r--r-- | drivers/watchdog/pcwd_pci.c | 832 |
1 files changed, 832 insertions, 0 deletions
diff --git a/drivers/watchdog/pcwd_pci.c b/drivers/watchdog/pcwd_pci.c new file mode 100644 index 0000000..61a89e9 --- /dev/null +++ b/drivers/watchdog/pcwd_pci.c @@ -0,0 +1,832 @@ +/* + * Berkshire PCI-PC Watchdog Card Driver + * + * (c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>. + * + * Based on source code of the following authors: + * Ken Hollis <kenji@bitgate.com>, + * Lindsay Harris <lindsay@bluegum.com>, + * Alan Cox <alan@redhat.com>, + * Matt Domsch <Matt_Domsch@dell.com>, + * Rob Radez <rob@osinvestor.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor + * provide warranty for any of this software. This material is + * provided "AS-IS" and at no charge. + */ + +/* + * A bells and whistles driver is available from: + * http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/ + * + * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/ + */ + +/* + * Includes, defines, variables, module parameters, ... + */ + +#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/pci.h> /* For pci functions */ +#include <linux/ioport.h> /* For io-port access */ +#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */ + +#include <asm/uaccess.h> /* For copy_to_user/put_user/... */ +#include <asm/io.h> /* For inb/outb/... */ + +/* Module and version information */ +#define WATCHDOG_VERSION "1.03" +#define WATCHDOG_DATE "21 Jan 2007" +#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog" +#define WATCHDOG_NAME "pcwd_pci" +#define PFX WATCHDOG_NAME ": " +#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n" + +/* Stuff for the PCI ID's */ +#ifndef PCI_VENDOR_ID_QUICKLOGIC +#define PCI_VENDOR_ID_QUICKLOGIC 0x11e3 +#endif + +#ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD +#define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030 +#endif + +/* + * These are the defines that describe the control status bits for the + * PCI-PC Watchdog card. + */ +/* 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_CLEAR_RESET_COUNT 0x84 + +/* 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; + +/* internal variables */ +static int temp_panic; +static unsigned long is_active; +static char expect_release; +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 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 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=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); + +/* + * Internal functions + */ + +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. + * Commands with 16 bits of data, should be written as LSB to port 4 + * and MSB to port 5. + * After the required data has been written then write the command to + * port 6. */ + outb_p(*lsb, pcipcwd_private.io_addr + 4); + outb_p(*msb, pcipcwd_private.io_addr + 5); + outb_p(cmd, pcipcwd_private.io_addr + 6); + + /* 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) & WD_PCI_WRSP; + for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) { + mdelay(1); + 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) { + /* read back response */ + *lsb = inb_p(pcipcwd_private.io_addr + 4); + *msb = inb_p(pcipcwd_private.io_addr + 5); + + /* 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; + + spin_lock(&pcipcwd_private.io_lock); + outb_p(0x00, pcipcwd_private.io_addr + 3); + udelay(1000); + + stat_reg = inb_p(pcipcwd_private.io_addr + 2); + spin_unlock(&pcipcwd_private.io_lock); + + 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; +} + +static int pcipcwd_stop(void) +{ + int stat_reg; + + spin_lock(&pcipcwd_private.io_lock); + outb_p(0xA5, pcipcwd_private.io_addr + 3); + udelay(1000); + + outb_p(0xA5, pcipcwd_private.io_addr + 3); + udelay(1000); + + stat_reg = inb_p(pcipcwd_private.io_addr + 2); + spin_unlock(&pcipcwd_private.io_lock); + + 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 */ + spin_lock(&pcipcwd_private.io_lock); + outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */ + spin_unlock(&pcipcwd_private.io_lock); + + if (debug >= DEBUG) + printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); + + return 0; +} + +static int pcipcwd_set_heartbeat(int t) +{ + int t_msb = t / 256; + int t_lsb = t % 256; + + if ((t < 0x0001) || (t > 0xFFFF)) + return -EINVAL; + + /* Write new heartbeat to watchdog */ + 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 control_status; + + *status=0; + control_status = inb_p(pcipcwd_private.io_addr + 1); + if (control_status & WD_PCI_WTRP) + *status |= WDIOF_CARDRESET; + 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) +{ + 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; +} + +static int pcipcwd_get_temperature(int *temperature) +{ + *temperature = 0; + if (!pcipcwd_private.supports_temp) + return -ENODEV; + + spin_lock(&pcipcwd_private.io_lock); + *temperature = inb_p(pcipcwd_private.io_addr); + spin_unlock(&pcipcwd_private.io_lock); + + /* + * Convert celsius to fahrenheit, since this was + * the decided 'standard' for this return value. + */ + *temperature = (*temperature * 9 / 5) + 32; + + if (debug >= DEBUG) { + printk(KERN_DEBUG PFX "temperature is: %d F\n", + *temperature); + } + + return 0; +} + +static int pcipcwd_get_timeleft(int *time_left) +{ + int msb; + int lsb; + + /* Read the time that's left before rebooting */ + /* Note: if the board is not yet armed then we will read 0xFFFF */ + send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb); + + *time_left = (msb << 8) + lsb; + + if (debug >= VERBOSE) + printk(KERN_DEBUG PFX "Time left before next reboot: %d\n", + *time_left); + + return 0; +} + +/* + * /dev/watchdog handling + */ + +static ssize_t pcipcwd_write(struct file *file, const char __user *data, + size_t len, loff_t *ppos) +{ + /* See if we got the magic character 'V' and reload the timer */ + if (len) { + if (!nowayout) { + size_t i; + + /* note: just in case someone wrote the magic character + * five months ago... */ + expect_release = 0; + + /* scan to see whether or not we got the magic character */ + for (i = 0; i != len; i++) { + char c; + if(get_user(c, data+i)) + return -EFAULT; + if (c == 'V') + expect_release = 42; + } + } + + /* someone wrote to us, we should reload the timer */ + pcipcwd_keepalive(); + } + return len; +} + +static int pcipcwd_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + int __user *p = argp; + static struct watchdog_info ident = { + .options = WDIOF_OVERHEAT | + WDIOF_CARDRESET | + WDIOF_KEEPALIVEPING | + WDIOF_SETTIMEOUT | + WDIOF_MAGICCLOSE, + .firmware_version = 1, + .identity = WATCHDOG_DRIVER_NAME, + }; + + switch (cmd) { + case WDIOC_GETSUPPORT: + return copy_to_user(argp, &ident, + sizeof (ident)) ? -EFAULT : 0; + + case WDIOC_GETSTATUS: + { + int status; + + pcipcwd_get_status(&status); + + return put_user(status, p); + } + + case WDIOC_GETBOOTSTATUS: + return put_user(pcipcwd_private.boot_status, p); + + case WDIOC_GETTEMP: + { + int temperature; + + if (pcipcwd_get_temperature(&temperature)) + return -EFAULT; + + return put_user(temperature, p); + } + + case WDIOC_KEEPALIVE: + pcipcwd_keepalive(); + return 0; + + case WDIOC_SETOPTIONS: + { + int new_options, retval = -EINVAL; + + if (get_user (new_options, p)) + return -EFAULT; + + if (new_options & WDIOS_DISABLECARD) { + if (pcipcwd_stop()) + return -EIO; + retval = 0; + } + + if (new_options & WDIOS_ENABLECARD) { + if (pcipcwd_start()) + return -EIO; + retval = 0; + } + + if (new_options & WDIOS_TEMPPANIC) { + temp_panic = 1; + retval = 0; + } + + return retval; + } + + case WDIOC_SETTIMEOUT: + { + int new_heartbeat; + + if (get_user(new_heartbeat, p)) + return -EFAULT; + + if (pcipcwd_set_heartbeat(new_heartbeat)) + return -EINVAL; + + pcipcwd_keepalive(); + /* Fall */ + } + + case WDIOC_GETTIMEOUT: + return put_user(heartbeat, p); + + case WDIOC_GETTIMELEFT: + { + int time_left; + + if (pcipcwd_get_timeleft(&time_left)) + return -EFAULT; + + return put_user(time_left, p); + } + + default: + return -ENOTTY; + } +} + +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 (debug >= VERBOSE) + printk(KERN_ERR PFX "Attempt to open already opened device.\n"); + return -EBUSY; + } + + /* Activate */ + pcipcwd_start(); + pcipcwd_keepalive(); + return nonseekable_open(inode, file); +} + +static int pcipcwd_release(struct inode *inode, struct file *file) +{ + /* + * Shut off the timer. + */ + if (expect_release == 42) { + pcipcwd_stop(); + } else { + printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); + pcipcwd_keepalive(); + } + expect_release = 0; + clear_bit(0, &is_active); + return 0; +} + +/* + * /dev/temperature handling + */ + +static ssize_t pcipcwd_temp_read(struct file *file, char __user *data, + size_t len, loff_t *ppos) +{ + int temperature; + + if (pcipcwd_get_temperature(&temperature)) + return -EFAULT; + + if (copy_to_user (data, &temperature, 1)) + return -EFAULT; + + return 1; +} + +static int pcipcwd_temp_open(struct inode *inode, struct file *file) +{ + if (!pcipcwd_private.supports_temp) + return -ENODEV; + + return nonseekable_open(inode, file); +} + +static int pcipcwd_temp_release(struct inode *inode, struct file *file) +{ + return 0; +} + +/* + * Notify system + */ + +static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused) +{ + if (code==SYS_DOWN || code==SYS_HALT) { + /* Turn the WDT off */ + pcipcwd_stop(); + } + + return NOTIFY_DONE; +} + +/* + * Kernel Interfaces + */ + +static const struct file_operations pcipcwd_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = pcipcwd_write, + .ioctl = pcipcwd_ioctl, + .open = pcipcwd_open, + .release = pcipcwd_release, +}; + +static struct miscdevice pcipcwd_miscdev = { + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &pcipcwd_fops, +}; + +static const struct file_operations pcipcwd_temp_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .read = pcipcwd_temp_read, + .open = pcipcwd_temp_open, + .release = pcipcwd_temp_release, +}; + +static struct miscdevice pcipcwd_temp_miscdev = { + .minor = TEMP_MINOR, + .name = "temperature", + .fops = &pcipcwd_temp_fops, +}; + +static struct notifier_block pcipcwd_notifier = { + .notifier_call = pcipcwd_notify_sys, +}; + +/* + * Init & exit routines + */ + +static int __devinit pcipcwd_card_init(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + int ret = -EIO; + + cards_found++; + if (cards_found == 1) + printk(KERN_INFO PFX DRIVER_VERSION); + + if (cards_found > 1) { + printk(KERN_ERR PFX "This driver only supports 1 device\n"); + return -ENODEV; + } + + if (pci_enable_device(pdev)) { + printk(KERN_ERR PFX "Not possible to enable PCI Device\n"); + return -ENODEV; + } + + if (pci_resource_start(pdev, 0) == 0x0000) { + printk(KERN_ERR PFX "No I/O-Address for card detected\n"); + ret = -ENODEV; + goto err_out_disable_device; + } + + pcipcwd_private.pdev = pdev; + pcipcwd_private.io_addr = pci_resource_start(pdev, 0); + + if (pci_request_regions(pdev, WATCHDOG_NAME)) { + printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", + (int) pcipcwd_private.io_addr); + ret = -EIO; + goto err_out_disable_device; + } + + /* get the boot_status */ + pcipcwd_get_status(&pcipcwd_private.boot_status); + + /* clear the "card caused reboot" flag */ + pcipcwd_clear_status(); + + /* disable card */ + pcipcwd_stop(); + + /* Check whether or not the card supports the temperature device */ + pcipcwd_check_temperature_support(); + + /* Show info about the card itself */ + pcipcwd_show_card_info(); + + /* If heartbeat = 0 then we use the heartbeat from the dip-switches */ + if (heartbeat == 0) + heartbeat = heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)]; + + /* Check that the heartbeat value is within it's range ; if not reset to the default */ + if (pcipcwd_set_heartbeat(heartbeat)) { + pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT); + printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n", + WATCHDOG_HEARTBEAT); + } + + ret = register_reboot_notifier(&pcipcwd_notifier); + if (ret != 0) { + printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", + ret); + goto err_out_release_region; + } + + if (pcipcwd_private.supports_temp) { + ret = misc_register(&pcipcwd_temp_miscdev); + if (ret != 0) { + printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + TEMP_MINOR, ret); + goto err_out_unregister_reboot; + } + } + + ret = misc_register(&pcipcwd_miscdev); + if (ret != 0) { + printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + WATCHDOG_MINOR, ret); + goto err_out_misc_deregister; + } + + printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", + heartbeat, nowayout); + + return 0; + +err_out_misc_deregister: + if (pcipcwd_private.supports_temp) + misc_deregister(&pcipcwd_temp_miscdev); +err_out_unregister_reboot: + unregister_reboot_notifier(&pcipcwd_notifier); +err_out_release_region: + pci_release_regions(pdev); +err_out_disable_device: + pci_disable_device(pdev); + return ret; +} + +static void __devexit pcipcwd_card_exit(struct pci_dev *pdev) +{ + /* Stop the timer before we leave */ + if (!nowayout) + pcipcwd_stop(); + + /* Deregister */ + misc_deregister(&pcipcwd_miscdev); + if (pcipcwd_private.supports_temp) + misc_deregister(&pcipcwd_temp_miscdev); + unregister_reboot_notifier(&pcipcwd_notifier); + pci_release_regions(pdev); + pci_disable_device(pdev); + cards_found--; +} + +static struct pci_device_id pcipcwd_pci_tbl[] = { + { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD, + PCI_ANY_ID, PCI_ANY_ID, }, + { 0 }, /* End of list */ +}; +MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl); + +static struct pci_driver pcipcwd_driver = { + .name = WATCHDOG_NAME, + .id_table = pcipcwd_pci_tbl, + .probe = pcipcwd_card_init, + .remove = __devexit_p(pcipcwd_card_exit), +}; + +static int __init pcipcwd_init_module(void) +{ + spin_lock_init(&pcipcwd_private.io_lock); + + return pci_register_driver(&pcipcwd_driver); +} + +static void __exit pcipcwd_cleanup_module(void) +{ + pci_unregister_driver(&pcipcwd_driver); + + printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); +} + +module_init(pcipcwd_init_module); +module_exit(pcipcwd_cleanup_module); + +MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>"); +MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); +MODULE_ALIAS_MISCDEV(TEMP_MINOR); |