| /* |
| * Berkshire PCI-PC Watchdog Card Driver |
| * |
| * (c) Copyright 2003-2005 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/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/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 "1.02" |
| #define WATCHDOG_DATE "03 Sep 2005" |
| #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 |
| |
| /* 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 2 /* 2 sec default heartbeat */ |
| static int heartbeat = WATCHDOG_HEARTBEAT; |
| module_param(heartbeat, int, 0); |
| MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, 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=CONFIG_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 */ |
| 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; |
| } |
| |
| 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; |
| |
| *temperature = inb_p(pcipcwd_private.io_addr); |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * /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); |
| |
| default: |
| return -ENOIOCTLCMD; |
| } |
| } |
| |
| 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 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 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(); |
| |
| /* 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 = { |
| .owner = THIS_MODULE, |
| .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); |
| } |
| |
| 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); |