Makefile didn't include building w83877f_wdt, so now it does.
Most drivers were modified to add a 'nowayout=[01]' module parameter
which defaults to CONFIG_WATCHDOG_NOWAYOUT if not passed. wdt285 and
w83877f weren't written to allow a way out at all, so they weren't modified.
To the following drivers was also added a 'timeout=X' module
parameter, where timeout is specified in seconds. Only drivers for
which no similar parm was already present were modified:
advantechwdt.c
eurotechwdt.c
ib700wdt.c
pcwd.c (also added WDIOC_GETTIMEOUT handler, sets aren't allowed)
wdt.c
wdt_pci.c
wdt977.c (woody@netwinder.org made the changes himself, also added set
timeout via ioctl, and asked me to submit)
These already offer a timeout parm:
i810-tco.c
softdog.c
wdt285.o
These didn't get a timeout parm because it wasn't obvious if or how it
could be done:
acquirewdt.c
machzwd.c
mixcomwd.c
shwdt.c
sbc60xxwdt.c
These build without error for me, but as I don't have any of the
hardware, I'd appreciate reports of use.
Makefile | 1
acquirewdt.c | 21 ++-
advantechwdt.c | 54 ++++++---
eurotechwdt.c | 64 +++++++---
i810-tco.c | 32 ++++-
ib700wdt.c | 77 +++++++-----
machzwd.c | 48 +++++---
mixcomwd.c | 75 +++++++-----
pcwd.c | 43 +++++--
sbc60xxwdt.c | 14 ++
shwdt.c | 21 +++
softdog.c | 33 +++--
wdt.c | 58 +++++++--
wdt977.c | 341 +++++++++++++++++++++++++++++++++++-----------------
wdt_pci.c | 62 +++++++---
15 files changed, 659 insertions(+), 285 deletions(-)
Thanks,
Matt
-- Matt Domsch Sr. Software Engineer Dell Linux Solutions www.dell.com/linux #1 US Linux Server provider with 24.5% (IDC Dec 2001) #2 Worldwide Linux Server provider with 18.2% (IDC Dec 2001)
diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/Makefile linux/drivers/char/Makefile --- linux-2.4.18-pre7/drivers/char/Makefile Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/Makefile Tue Jan 29 12:56:20 2002 @@ -235,6 +235,7 @@ obj-$(CONFIG_MACHZ_WDT) += machzwd.o obj-$(CONFIG_SH_WDT) += shwdt.o obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o +obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o subdir-$(CONFIG_MWAVE) += mwave ifeq ($(CONFIG_MWAVE),y) diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/acquirewdt.c linux/drivers/char/acquirewdt.c --- linux-2.4.18-pre7/drivers/char/acquirewdt.c Thu Sep 13 17:21:32 2001 +++ linux/drivers/char/acquirewdt.c Tue Jan 29 12:56:20 2002 @@ -17,6 +17,9 @@ * * (c) Copyright 1995 Alan Cox <alan@redhat.com> * + * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com> + * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT + * Can't add timeout - driver doesn't allow changing value */ #include <linux/config.h> @@ -50,8 +53,14 @@ static spinlock_t acq_lock; #define WDT_STOP 0x43 #define WDT_START 0x443 -#define WD_TIMO (100*60) /* 1 minute */ +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); /* * Kernel methods. @@ -126,10 +135,12 @@ static int acq_open(struct inode *inode, spin_unlock(&acq_lock); return -EBUSY; } + if (nowayout) { + MOD_INC_USE_COUNT; + } /* * Activate */ - acq_is_open=1; inb_p(WDT_START); spin_unlock(&acq_lock); @@ -145,9 +156,9 @@ static int acq_close(struct inode *inode if(MINOR(inode->i_rdev)==WATCHDOG_MINOR) { spin_lock(&acq_lock); -#ifndef CONFIG_WATCHDOG_NOWAYOUT - inb_p(WDT_STOP); -#endif + if (!nowayout) { + inb_p(WDT_STOP); + } acq_is_open=0; spin_unlock(&acq_lock); } diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/advantechwdt.c linux/drivers/char/advantechwdt.c --- linux-2.4.18-pre7/drivers/char/advantechwdt.c Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/advantechwdt.c Tue Jan 29 13:12:01 2002 @@ -19,7 +19,10 @@ * "AS-IS" and at no charge. * * (c) Copyright 1995 Alan Cox <alan@redhat.com> - * + * + * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com> + * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT + * Added timeout module option to override default */ #include <linux/config.h> @@ -56,25 +59,45 @@ static spinlock_t advwdt_lock; * the manual says WDT_STOP is 0x43, not 0x443). * (0x43 is also a write-only control register for the 8254 timer!) * - * TODO: module parameters to set the I/O port addresses and NOWAYOUT - * option at load time. + * TODO: module parameters to set the I/O port addresses */ #define WDT_STOP 0x443 #define WDT_START 0x443 #define WD_TIMO 60 /* 1 minute */ -static int wd_margin = WD_TIMO; +static int timeout = WD_TIMO; /* in seconds */ +MODULE_PARM(timeout,"i"); +MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default=60)"); + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); /* * Kernel methods. */ +static int +advwdt_validate_timeout(void) +{ + if (timeout < 1 || timeout > 63) { + timeout = WD_TIMO; + printk(KERN_INFO "advantechwdt: timeout value must be 1 <= x <= 63, using %d\n", timeout); + return -EINVAL; + } + return 0; +} static void advwdt_ping(void) { /* Write a watchdog value */ - outb_p(wd_margin, WDT_START); + outb_p(timeout, WDT_START); } static ssize_t @@ -101,7 +124,7 @@ static int advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { - int new_margin; + int rc; static struct watchdog_info ident = { WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT, 1, "Advantech WDT" }; @@ -122,16 +145,15 @@ advwdt_ioctl(struct inode *inode, struct break; case WDIOC_SETTIMEOUT: - if (get_user(new_margin, (int *)arg)) + if (get_user(timeout, (int *)arg)) return -EFAULT; - if ((new_margin < 1) || (new_margin > 63)) - return -EINVAL; - wd_margin = new_margin; + rc = advwdt_validate_timeout(); + if (rc) return rc; advwdt_ping(); /* Fall */ case WDIOC_GETTIMEOUT: - return put_user(wd_margin, (int *)arg); + return put_user(timeout, (int *)arg); break; default: @@ -150,6 +172,9 @@ advwdt_open(struct inode *inode, struct spin_unlock(&advwdt_lock); return -EBUSY; } + if (nowayout) { + MOD_INC_USE_COUNT; + } /* * Activate */ @@ -169,9 +194,9 @@ advwdt_close(struct inode *inode, struct lock_kernel(); if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) { spin_lock(&advwdt_lock); -#ifndef CONFIG_WATCHDOG_NOWAYOUT - inb_p(WDT_STOP); -#endif + if (!nowayout) { + inb_p(WDT_STOP); + } advwdt_is_open = 0; spin_unlock(&advwdt_lock); } @@ -229,6 +254,7 @@ advwdt_init(void) { printk("WDT driver for Advantech single board computer initialising.\n"); + advwdt_validate_timeout(); spin_lock_init(&advwdt_lock); misc_register(&advwdt_miscdev); #if WDT_START != WDT_STOP diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/eurotechwdt.c linux/drivers/char/eurotechwdt.c --- linux-2.4.18-pre7/drivers/char/eurotechwdt.c Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/eurotechwdt.c Tue Jan 29 13:16:42 2002 @@ -20,6 +20,10 @@ * "AS-IS" and at no charge. * * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>* + * + * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com> + * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT + * Added timeout module option to override default */ #include <linux/config.h> @@ -45,7 +49,6 @@ #include <linux/smp_lock.h> static int eurwdt_is_open; -static int eurwdt_timeout; static spinlock_t eurwdt_lock; /* @@ -58,6 +61,17 @@ static int irq = 10; static char *ev = "int"; #define WDT_TIMEOUT 60 /* 1 minute */ +static int timeout = WDT_TIMEOUT; +MODULE_PARM(timeout,"i"); +MODULE_PARM_DESC(timeout, "Eurotech WDT timeout in seconds (default=60)"); + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); /* @@ -116,6 +130,18 @@ MODULE_PARM_DESC(ev, "Eurotech WDT event * Programming support */ +static int +eurwdt_validate_timeout(void) +{ + if (timeout < 0 || timeout > 255) { + timeout = WDT_TIMEOUT; + printk(KERN_INFO "eurwdt: timeout must be 0 < x < 255, using %d\n", + timeout); + return -EINVAL; + } + return 0; +} + static inline void eurwdt_write_reg(u8 index, u8 data) { outb(index, io); @@ -189,7 +215,7 @@ void eurwdt_interrupt(int irq, void *dev static void eurwdt_ping(void) { /* Write the watchdog default value */ - eurwdt_set_timeout(eurwdt_timeout); + eurwdt_set_timeout(timeout); } /** @@ -238,7 +264,7 @@ static int eurwdt_ioctl(struct inode *in identity : "WDT Eurotech CPU-1220/1410" }; - int time; + int rc; switch(cmd) { default: @@ -256,19 +282,16 @@ static int eurwdt_ioctl(struct inode *in return 0; case WDIOC_SETTIMEOUT: - if (copy_from_user(&time, (int *) arg, sizeof(int))) + if (copy_from_user(&timeout, (int *) arg, sizeof(int))) return -EFAULT; - /* Sanity check */ - if (time < 0 || time > 255) - return -EINVAL; - - eurwdt_timeout = time; - eurwdt_set_timeout(time); + rc = eurwdt_validate_timeout(); + if (rc) return rc; + eurwdt_set_timeout(timeout); /* Fall */ case WDIOC_GETTIMEOUT: - return put_user(eurwdt_timeout, (int *)arg); + return put_user(timeout, (int *)arg); } } @@ -290,9 +313,11 @@ static int eurwdt_open(struct inode *ino spin_unlock(&eurwdt_lock); return -EBUSY; } + if (nowayout) { + MOD_INC_USE_COUNT; + } eurwdt_is_open = 1; - eurwdt_timeout = WDT_TIMEOUT; /* initial timeout */ /* Activate the WDT */ eurwdt_activate_timer(); @@ -326,14 +351,13 @@ static int eurwdt_open(struct inode *ino static int eurwdt_release(struct inode *inode, struct file *file) { if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) { -#ifndef CONFIG_WATCHDOG_NOWAYOUT - eurwdt_disable_timer(); -#endif - eurwdt_is_open = 0; + if (!nowayout) { + eurwdt_disable_timer(); + } + eurwdt_is_open = 0; - MOD_DEC_USE_COUNT; + MOD_DEC_USE_COUNT; } - return 0; } @@ -425,7 +449,9 @@ static void __exit eurwdt_exit(void) static int __init eurwdt_init(void) { int ret; - + + eurwdt_validate_timeout(); + ret = misc_register(&eurwdt_miscdev); if (ret) { printk(KERN_ERR "eurwdt: can't misc_register on minor=%d\n", diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/i810-tco.c linux/drivers/char/i810-tco.c --- linux-2.4.18-pre7/drivers/char/i810-tco.c Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/i810-tco.c Tue Jan 29 12:56:20 2002 @@ -1,5 +1,5 @@ /* - * i810-tco 0.02: TCO timer driver for i810 chipsets + * i810-tco 0.03: TCO timer driver for i810 chipsets * * (c) Copyright 2000 kernel concepts <nils@kernelconcepts.de>, All Rights Reserved. * http://www.kernelconcepts.de @@ -28,6 +28,9 @@ * Initial Version 0.01 * 20000728 Nils Faerber * 0.02 Fix for SMI_EN->TCO_EN bit, some cleanups + * 20011214 Matt Domsch <Matt_Domsch@dell.com> + * 0.03 Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT + * Didn't add timeout option as i810_margin already exists. */ #include <linux/module.h> @@ -60,6 +63,18 @@ static spinlock_t tco_lock; /* Guards th static int i810_margin = TIMER_MARGIN; /* steps of 0.6sec */ MODULE_PARM (i810_margin, "i"); +MODULE_PARM_DESC(i810_margin, "Watchdog timeout in steps of 0.6sec, 2<n<64. Default = 50 (30 seconds)"); + + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + /* * Timer active flag @@ -167,6 +182,9 @@ static int i810tco_open (struct inode *i if (timer_alive) return -EBUSY; + if (nowayout) { + MOD_INC_USE_COUNT; + } /* * Reload and activate timer */ @@ -181,10 +199,10 @@ static int i810tco_release (struct inode /* * Shut off the timer. */ -#ifndef CONFIG_WATCHDOG_NOWAYOUT - tco_timer_stop (); - timer_alive = 0; -#endif + if (nowayout) { + tco_timer_stop (); + timer_alive = 0; + } return 0; } @@ -357,8 +375,8 @@ static int __init watchdog_init (void) tco_timer_reload (); printk (KERN_INFO - "i810 TCO timer: V0.02, timer margin: %d sec (0x%04x)\n", - (int) (i810_margin * 6 / 10), TCOBASE); + "i810 TCO timer: V0.03, timer margin: %d sec (0x%04x), nowayout: %d\n", + (int) (i810_margin * 6 / 10), TCOBASE, nowayout); return 0; } diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/ib700wdt.c linux/drivers/char/ib700wdt.c --- linux-2.4.18-pre7/drivers/char/ib700wdt.c Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/ib700wdt.c Tue Jan 29 16:27:18 2002 @@ -25,6 +25,10 @@ * * (c) Copyright 1995 Alan Cox <alan@redhat.com> * + * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com> + * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT + * Added timeout module option to override default + * */ #include <linux/config.h> @@ -87,43 +91,48 @@ static spinlock_t ibwdt_lock; * */ -static int wd_times[] = { - 30, /* 0x0 */ - 28, /* 0x1 */ - 26, /* 0x2 */ - 24, /* 0x3 */ - 22, /* 0x4 */ - 20, /* 0x5 */ - 18, /* 0x6 */ - 16, /* 0x7 */ - 14, /* 0x8 */ - 12, /* 0x9 */ - 10, /* 0xA */ - 8, /* 0xB */ - 6, /* 0xC */ - 4, /* 0xD */ - 2, /* 0xE */ - 0, /* 0xF */ -}; - #define WDT_STOP 0x441 #define WDT_START 0x443 /* Default timeout */ #define WD_TIMO 0 /* 30 seconds +/- 20%, from table */ -static int wd_margin = WD_TIMO; +static int timeout_val = WD_TIMO; /* value in table */ +static int timeout = 30; /* in seconds */ +MODULE_PARM(timeout,"i"); +MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds, 0 < n < 30, must be even (default=30)"); + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); /* * Kernel methods. */ +static int +ibwdt_validate_timeout(void) +{ + timeout_val = (30 - timeout) / 2; + if (timeout_val < 0 || timeout_val > 0xF) { + timeout_val = WD_TIMO; + timeout = 30; + printk(KERN_INFO "ib700wdt: timeout must be 0 < x < 30, x even, using %d\n", timeout); + return -EINVAL; + } + return 0; +} + static void ibwdt_ping(void) { /* Write a watchdog value */ - outb_p(wd_times[wd_margin], WDT_START); + outb_p(timeout_val, WDT_START); } static ssize_t @@ -150,7 +159,7 @@ static int ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { - int i, new_margin; + int rc; static struct watchdog_info ident = { WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT, 1, "IB700 WDT" @@ -172,19 +181,15 @@ ibwdt_ioctl(struct inode *inode, struct break; case WDIOC_SETTIMEOUT: - if (get_user(new_margin, (int *)arg)) + if (get_user(timeout, (int *)arg)) return -EFAULT; - if ((new_margin < 0) || (new_margin > 30)) - return -EINVAL; - for (i = 0x0F; i > -1; i--) - if (wd_times[i] > new_margin) - break; - wd_margin = i; + rc=ibwdt_validate_timeout(); + if (rc) return rc; ibwdt_ping(); /* Fall */ case WDIOC_GETTIMEOUT: - return put_user(wd_times[wd_margin], (int *)arg); + return put_user(timeout, (int *)arg); break; default: @@ -203,6 +208,9 @@ ibwdt_open(struct inode *inode, struct f spin_unlock(&ibwdt_lock); return -EBUSY; } + if (nowayout) { + MOD_INC_USE_COUNT; + } /* * Activate */ @@ -222,9 +230,9 @@ ibwdt_close(struct inode *inode, struct lock_kernel(); if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) { spin_lock(&ibwdt_lock); -#ifndef CONFIG_WATCHDOG_NOWAYOUT - outb_p(wd_times[wd_margin], WDT_STOP); -#endif + if (!nowayout) { + outb_p(timeout_val, WDT_STOP); + } ibwdt_is_open = 0; spin_unlock(&ibwdt_lock); } @@ -242,7 +250,7 @@ ibwdt_notify_sys(struct notifier_block * { if (code == SYS_DOWN || code == SYS_HALT) { /* Turn the WDT off */ - outb_p(wd_times[wd_margin], WDT_STOP); + outb_p(timeout_val, WDT_STOP); } return NOTIFY_DONE; } @@ -282,6 +290,7 @@ ibwdt_init(void) { printk("WDT driver for IB700 single board computer initialising.\n"); + ibwdt_validate_timeout(); spin_lock_init(&ibwdt_lock); misc_register(&ibwdt_miscdev); #if WDT_START != WDT_STOP diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/machzwd.c linux/drivers/char/machzwd.c --- linux-2.4.18-pre7/drivers/char/machzwd.c Thu Sep 13 17:21:32 2001 +++ linux/drivers/char/machzwd.c Tue Jan 29 12:56:20 2002 @@ -24,6 +24,8 @@ * a system RESET and it starts wd#2 that unconditionaly will RESET * the system when the counter reaches zero. * + * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com> + * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT */ #include <linux/config.h> @@ -103,6 +105,16 @@ MODULE_LICENSE("GPL"); MODULE_PARM(action, "i"); MODULE_PARM_DESC(action, "after watchdog resets, generate: 0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI"); +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + + #define PFX "machzwd" static struct watchdog_info zf_info = { @@ -307,23 +319,23 @@ static ssize_t zf_write(struct file *fil * no need to check for close confirmation * no way to disable watchdog ;) */ -#ifndef CONFIG_WATCHDOG_NOWAYOUT - size_t ofs; - - /* - * note: just in case someone wrote the magic character - * five months ago... - */ - zf_expect_close = 0; - - /* now scan */ - for(ofs = 0; ofs != count; ofs++){ - if(buf[ofs] == 'V'){ - zf_expect_close = 1; - dprintk("zf_expect_close 1\n"); + if (!nowayout) { + size_t ofs; + + /* + * note: just in case someone wrote the magic character + * five months ago... + */ + zf_expect_close = 0; + + /* now scan */ + for(ofs = 0; ofs != count; ofs++){ + if(buf[ofs] == 'V'){ + zf_expect_close = 1; + dprintk("zf_expect_close 1\n"); + } } } -#endif /* * Well, anyhow someone wrote to us, * we should return that favour @@ -386,9 +398,9 @@ static int zf_open(struct inode *inode, return -EBUSY; } -#ifdef CONFIG_WATCHDOG_NOWAYOUT - MOD_INC_USE_COUNT; -#endif + if (nowayout) { + MOD_INC_USE_COUNT; + } zf_is_open = 1; spin_unlock(&zf_lock); diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/mixcomwd.c linux/drivers/char/mixcomwd.c --- linux-2.4.18-pre7/drivers/char/mixcomwd.c Thu Sep 13 17:21:32 2001 +++ linux/drivers/char/mixcomwd.c Tue Jan 29 12:56:20 2002 @@ -27,10 +27,13 @@ * * Version 0.4 (99/11/15): * - support for one more type board + * + * Version 0.5 (2001/12/14) Matt Domsch <Matt_Domsch@dell.com> + * - added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT * */ -#define VERSION "0.4" +#define VERSION "0.5" #include <linux/module.h> #include <linux/config.h> @@ -57,26 +60,30 @@ static int mixcomwd_ioports[] = { 0x180, static long mixcomwd_opened; /* long req'd for setbit --RR */ static int watchdog_port; - -#ifndef CONFIG_WATCHDOG_NOWAYOUT static int mixcomwd_timer_alive; static struct timer_list mixcomwd_timer; + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; #endif +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + static void mixcomwd_ping(void) { outb_p(55,watchdog_port); return; } -#ifndef CONFIG_WATCHDOG_NOWAYOUT static void mixcomwd_timerfun(unsigned long d) { mixcomwd_ping(); mod_timer(&mixcomwd_timer,jiffies+ 5*HZ); } -#endif /* * Allow only one person to hold it open @@ -89,12 +96,14 @@ static int mixcomwd_open(struct inode *i } mixcomwd_ping(); -#ifndef CONFIG_WATCHDOG_NOWAYOUT - if(mixcomwd_timer_alive) { - del_timer(&mixcomwd_timer); - mixcomwd_timer_alive=0; - } -#endif + if (nowayout) { + MOD_INC_USE_COUNT; + } else { + if(mixcomwd_timer_alive) { + del_timer(&mixcomwd_timer); + mixcomwd_timer_alive=0; + } + } return 0; } @@ -102,19 +111,19 @@ static int mixcomwd_release(struct inode { lock_kernel(); -#ifndef CONFIG_WATCHDOG_NOWAYOUT - if(mixcomwd_timer_alive) { - printk(KERN_ERR "mixcomwd: release called while internal timer alive"); - unlock_kernel(); - return -EBUSY; + if (!nowayout) { + if(mixcomwd_timer_alive) { + printk(KERN_ERR "mixcomwd: release called while internal timer alive"); + unlock_kernel(); + return -EBUSY; + } + init_timer(&mixcomwd_timer); + mixcomwd_timer.expires=jiffies + 5 * HZ; + mixcomwd_timer.function=mixcomwd_timerfun; + mixcomwd_timer.data=0; + mixcomwd_timer_alive=1; + add_timer(&mixcomwd_timer); } - init_timer(&mixcomwd_timer); - mixcomwd_timer.expires=jiffies + 5 * HZ; - mixcomwd_timer.function=mixcomwd_timerfun; - mixcomwd_timer.data=0; - mixcomwd_timer_alive=1; - add_timer(&mixcomwd_timer); -#endif clear_bit(0,&mixcomwd_opened); unlock_kernel(); @@ -148,9 +157,9 @@ static int mixcomwd_ioctl(struct inode * { case WDIOC_GETSTATUS: status=mixcomwd_opened; -#ifndef CONFIG_WATCHDOG_NOWAYOUT - status|=mixcomwd_timer_alive; -#endif + if (!nowayout) { + status|=mixcomwd_timer_alive; + } if (copy_to_user((int *)arg, &status, sizeof(int))) { return -EFAULT; } @@ -255,14 +264,14 @@ static int __init mixcomwd_init(void) static void __exit mixcomwd_exit(void) { -#ifndef CONFIG_WATCHDOG_NOWAYOUT - if(mixcomwd_timer_alive) { - printk(KERN_WARNING "mixcomwd: I quit now, hardware will" - " probably reboot!\n"); - del_timer(&mixcomwd_timer); - mixcomwd_timer_alive=0; + if (!nowayout) { + if(mixcomwd_timer_alive) { + printk(KERN_WARNING "mixcomwd: I quit now, hardware will" + " probably reboot!\n"); + del_timer(&mixcomwd_timer); + mixcomwd_timer_alive=0; + } } -#endif release_region(watchdog_port,1); misc_deregister(&mixcomwd_miscdev); } diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/pcwd.c linux/drivers/char/pcwd.c --- linux-2.4.18-pre7/drivers/char/pcwd.c Thu Sep 13 17:21:32 2001 +++ linux/drivers/char/pcwd.c Tue Jan 29 16:25:25 2002 @@ -40,6 +40,9 @@ * fairly useless proc entry. * 990610 removed said useless proc code for the merge <alan> * 000403 Removed last traces of proc code. <davej> + * 011214 Added nowayout module option <Matt_Domsch@dell.com> + * to override CONFIG_WATCHDOG_NOWAYOUT + * Added set/get timeout ioctl handlers (sets not allowed). */ #include <linux/module.h> @@ -76,7 +79,7 @@ */ static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 }; -#define WD_VER "1.10 (06/05/99)" +#define WD_VER "1.12 (12/14/2001)" /* * It should be noted that PCWD_REVISION_B was removed because A and B @@ -88,7 +91,17 @@ static int pcwd_ioports[] = { 0x270, 0x3 #define PCWD_REVISION_A 1 #define PCWD_REVISION_C 2 -#define WD_TIMEOUT 3 /* 1 1/2 seconds for a timeout */ +#define WD_TIMEOUT 4 /* 2 seconds for a timeout */ + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + /* * These are the defines for the PC Watchdog card, revision A. @@ -181,7 +194,7 @@ static int __init pcwd_checkcard(void) return((found) ? 1 : 0); } -void pcwd_showprevstate(void) +static void pcwd_showprevstate(void) { int card_status = 0x0000; @@ -377,6 +390,12 @@ static int pcwd_ioctl(struct inode *inod case WDIOC_KEEPALIVE: pcwd_send_heartbeat(); return 0; + + case WDIOC_SETTIMEOUT: + return -ENOTSUPP; + + case WDIOC_GETTIMEOUT: + return put_user(WD_TIMEOUT/2, (int *)arg); } return 0; @@ -454,15 +473,15 @@ static int pcwd_close(struct inode *ino, { lock_kernel(); is_open = 0; -#ifndef CONFIG_WATCHDOG_NOWAYOUT - /* Disable the board */ - if (revision == PCWD_REVISION_C) { - spin_lock(&io_lock); - outb_p(0xA5, current_readport + 3); - outb_p(0xA5, current_readport + 3); - spin_unlock(&io_lock); + if (!nowayout) { + /* Disable the board */ + if (revision == PCWD_REVISION_C) { + spin_lock(&io_lock); + outb_p(0xA5, current_readport + 3); + outb_p(0xA5, current_readport + 3); + spin_unlock(&io_lock); + } } -#endif unlock_kernel(); } return 0; @@ -563,7 +582,7 @@ static struct miscdevice temp_miscdev = "temperature", &pcwd_fops }; - + static int __init pcwatchdog_init(void) { int i, found = 0; diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/sbc60xxwdt.c linux/drivers/char/sbc60xxwdt.c --- linux-2.4.18-pre7/drivers/char/sbc60xxwdt.c Thu Sep 13 17:21:32 2001 +++ linux/drivers/char/sbc60xxwdt.c Tue Jan 29 12:56:20 2002 @@ -109,6 +109,15 @@ static unsigned long next_heartbeat; static int wdt_is_open; static int wdt_expect_close; +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + /* * Whack the dog */ @@ -202,6 +211,9 @@ static int fop_open(struct inode * inode /* Just in case we're already talking to someone... */ if(wdt_is_open) return -EBUSY; + if (nowayout) { + MOD_INC_USE_COUNT; + } /* Good, fire up the show */ wdt_is_open = 1; wdt_startup(); @@ -217,7 +229,7 @@ static int fop_close(struct inode * inod lock_kernel(); if(MINOR(inode->i_rdev) == WATCHDOG_MINOR) { - if(wdt_expect_close) + if(wdt_expect_close && !nowayout) wdt_turnoff(); else { del_timer(&timer); diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/shwdt.c linux/drivers/char/shwdt.c --- linux-2.4.18-pre7/drivers/char/shwdt.c Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/shwdt.c Tue Jan 29 12:56:20 2002 @@ -9,6 +9,9 @@ * 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. + * + * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com> + * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT */ #include <linux/config.h> #include <linux/module.h> @@ -60,6 +63,15 @@ static int sh_is_open = 0; static struct watchdog_info sh_wdt_info; +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + /** * sh_wdt_write_cnt - Write to Counter * @@ -136,6 +148,9 @@ static int sh_wdt_open(struct inode *ino if (sh_is_open) { return -EBUSY; } + if (nowayout) { + MOD_INC_USE_COUNT; + } sh_is_open = 1; sh_wdt_start(); @@ -161,9 +176,9 @@ static int sh_wdt_close(struct inode *in lock_kernel(); if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) { -#ifndef CONFIG_WATCHDOG_NOWAYOUT - sh_wdt_stop(); -#endif + if (!nowayout) { + sh_wdt_stop(); + } sh_is_open = 0; } diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/softdog.c linux/drivers/char/softdog.c --- linux-2.4.18-pre7/drivers/char/softdog.c Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/softdog.c Tue Jan 29 12:56:20 2002 @@ -1,5 +1,5 @@ /* - * SoftDog 0.05: A Software Watchdog Device + * SoftDog 0.06: A Software Watchdog Device * * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved. * http://www.redhat.com @@ -31,6 +31,10 @@ * Added soft_noboot; Allows testing the softdog trigger without * requiring a recompile. * Added WDIOC_GETTIMEOUT and WDIOC_SETTIMOUT. + * + * 20011214 Matt Domsch <Matt_Domsch@dell.com> + * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT + * Didn't add timeout option, as soft_margin option already exists. */ #include <linux/module.h> @@ -57,6 +61,15 @@ static int soft_noboot = 0; MODULE_PARM(soft_margin,"i"); MODULE_PARM(soft_noboot,"i"); + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); MODULE_LICENSE("GPL"); /* @@ -95,9 +108,9 @@ static int softdog_open(struct inode *in { if(timer_alive) return -EBUSY; -#ifdef CONFIG_WATCHDOG_NOWAYOUT - MOD_INC_USE_COUNT; -#endif + if (nowayout) { + MOD_INC_USE_COUNT; + } /* * Activate timer */ @@ -110,12 +123,12 @@ static int softdog_release(struct inode { /* * Shut off the timer. - * Lock it in if it's a module and we defined ...NOWAYOUT + * Lock it in if it's a module and we set nowayout */ lock_kernel(); -#ifndef CONFIG_WATCHDOG_NOWAYOUT - del_timer(&watchdog_ticktock); -#endif + if(!nowayout) { + del_timer(&watchdog_ticktock); + } timer_alive=0; unlock_kernel(); return 0; @@ -186,7 +199,7 @@ static struct miscdevice softdog_miscdev fops: &softdog_fops, }; -static char banner[] __initdata = KERN_INFO "Software Watchdog Timer: 0.05, timer margin: %d sec\n"; +static char banner[] __initdata = KERN_INFO "Software Watchdog Timer: 0.06, soft_margin: %d sec, nowayout: %d\n"; static int __init watchdog_init(void) { @@ -197,7 +210,7 @@ static int __init watchdog_init(void) if (ret) return ret; - printk(banner, soft_margin); + printk(banner, soft_margin, nowayout); return 0; } diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/wdt.c linux/drivers/char/wdt.c --- linux-2.4.18-pre7/drivers/char/wdt.c Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/wdt.c Tue Jan 29 16:04:00 2002 @@ -15,7 +15,7 @@ * * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk> * - * Release 0.08. + * Release 0.09. * * Fixes * Dave Gregorich : Modularisation and minor bugs @@ -28,6 +28,7 @@ * Parameterized timeout * Tigran Aivazian : Restructured wdt_init() to handle failures * Joel Becker : Added WDIOC_GET/SETTIMEOUT + * Matt Domsch : added nowayout and timeout module options */ #include <linux/config.h> @@ -64,7 +65,32 @@ static int irq=11; /* Default margin */ #define WD_TIMO (100*60) /* 1 minute */ -static int wd_margin = WD_TIMO; +static int timeout_val = WD_TIMO; /* value passed to card */ +static int timeout = 60; /* in seconds */ +MODULE_PARM(timeout,"i"); +MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default=60)"); + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + +static int +wdt_validate_timeout(void) +{ + /* Arbitrary, can't find the card's limits */ + if (timeout < 0 || timeout > 60) { + timeout = 60; + timeout_val = WD_TIMO; + return -EINVAL; + } + timeout_val = timeout * 100; + return 0; +} #ifndef MODULE @@ -220,7 +246,7 @@ static void wdt_ping(void) /* Write a watchdog value */ inb_p(WDT_DC); wdt_ctr_mode(1,2); - wdt_ctr_load(1,wd_margin); /* Timeout */ + wdt_ctr_load(1,timeout_val); /* Timeout */ outb_p(0, WDT_DC); } @@ -298,7 +324,7 @@ static ssize_t wdt_read(struct file *fil static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { - int new_margin; + int rc; static struct watchdog_info ident= { @@ -325,16 +351,14 @@ static int wdt_ioctl(struct inode *inode wdt_ping(); return 0; case WDIOC_SETTIMEOUT: - if (get_user(new_margin, (int *)arg)) + if (get_user(timeout, (int *)arg)) return -EFAULT; - /* Arbitrary, can't find the card's limits */ - if ((new_margin < 0) || (new_margin > 60)) - return -EINVAL; - wd_margin = new_margin * 100; + rc = wdt_validate_timeout(); + if (rc) return rc; wdt_ping(); /* Fall */ case WDIOC_GETTIMEOUT: - return put_user(wd_margin / 100, (int *)arg); + return put_user(timeout, (int *)arg); } } @@ -357,6 +381,9 @@ static int wdt_open(struct inode *inode, case WATCHDOG_MINOR: if(wdt_is_open) return -EBUSY; + if (nowayout) { + MOD_INC_USE_COUNT; + } /* * Activate */ @@ -367,7 +394,7 @@ static int wdt_open(struct inode *inode, wdt_ctr_mode(1,2); wdt_ctr_mode(2,0); wdt_ctr_load(0, 8948); /* count at 100Hz */ - wdt_ctr_load(1,wd_margin); /* Timeout 120 seconds */ + wdt_ctr_load(1,timeout_val); /* Timeout */ wdt_ctr_load(2,65535); outb_p(0, WDT_DC); /* Enable */ return 0; @@ -395,10 +422,10 @@ static int wdt_release(struct inode *ino lock_kernel(); if(MINOR(inode->i_rdev)==WATCHDOG_MINOR) { -#ifndef CONFIG_WATCHDOG_NOWAYOUT - inb_p(WDT_DC); /* Disable counters */ - wdt_ctr_load(2,0); /* 0 length reset pulses now */ -#endif + if (!nowayout) { + inb_p(WDT_DC); /* Disable counters */ + wdt_ctr_load(2,0); /* 0 length reset pulses now */ + } wdt_is_open=0; } unlock_kernel(); @@ -505,6 +532,7 @@ static int __init wdt_init(void) { int ret; + wdt_validate_timeout(); ret = misc_register(&wdt_miscdev); if (ret) { printk(KERN_ERR "wdt: can't misc_register on minor=%d\n", WATCHDOG_MINOR); diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/wdt977.c linux/drivers/char/wdt977.c --- linux-2.4.18-pre7/drivers/char/wdt977.c Fri Sep 7 11:28:38 2001 +++ linux/drivers/char/wdt977.c Tue Jan 29 16:05:05 2002 @@ -1,5 +1,5 @@ /* - * Wdt977 0.01: A Watchdog Device for Netwinder W83977AF chip + * Wdt977 0.02: A Watchdog Device for Netwinder W83977AF chip * * (c) Copyright 1998 Rebel.com (Woody Suwalski <woody@netwinder.org>) * @@ -11,8 +11,13 @@ * 2 of the License, or (at your option) any later version. * * ----------------------- + * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com> + * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT + * 19-Dec-2001 Woody Suwalski: Netwinder fixes, ioctl interface + * 06-Jan-2002 Woody Suwalski: For compatibility, convert all timeouts + * from minutes to seconds. */ - + #include <linux/module.h> #include <linux/config.h> #include <linux/types.h> @@ -21,56 +26,123 @@ #include <linux/miscdevice.h> #include <linux/init.h> #include <linux/smp_lock.h> +#include <linux/watchdog.h> #include <asm/io.h> #include <asm/system.h> #include <asm/mach-types.h> +#include <asm/uaccess.h> #define WATCHDOG_MINOR 130 -static int timeout = 3; +#define DEFAULT_TIMEOUT 1 /* default timeout = 1 minute */ + +static int timeout = DEFAULT_TIMEOUT*60; /* TO in seconds from user */ +static int timeoutM = DEFAULT_TIMEOUT; /* timeout in minutes */ static int timer_alive; static int testmode; +MODULE_PARM(timeout, "i"); +MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (60..15300), default=60"); +MODULE_PARM(testmode, "i"); +MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0"); + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + + +/* This is kicking the watchdog by simply re-writing the timeout to reg. 0xF2 */ +static int kick_wdog(void) +{ + /* + * Refresh the timer. + */ + + /* unlock the SuperIO chip */ + outb(0x87,0x370); + outb(0x87,0x370); + + /* select device Aux2 (device=8) and kicks watchdog reg F2 */ + /* F2 has the timeout in minutes */ + + outb(0x07,0x370); + outb(0x08,0x371); + outb(0xF2,0x370); + outb(timeoutM,0x371); + + /* lock the SuperIO chip */ + outb(0xAA,0x370); + + return 0; +} + + /* * Allow only one person to hold it open */ - + static int wdt977_open(struct inode *inode, struct file *file) { + if(timer_alive) return -EBUSY; -#ifdef CONFIG_WATCHDOG_NOWAYOUT - MOD_INC_USE_COUNT; -#endif + + /* convert seconds to minutes, rounding up */ + timeoutM = timeout + 59; + timeoutM /= 60; + + if (nowayout) + { + MOD_INC_USE_COUNT; + + /* do not permit disabling the watchdog by writing 0 to reg. 0xF2 */ + if (!timeoutM) timeoutM = DEFAULT_TIMEOUT; + } timer_alive++; - //max timeout value = 255 minutes (0xFF). Write 0 to disable WatchDog. - if (timeout>255) - timeout = 255; - - printk(KERN_INFO "Watchdog: active, current timeout %d min.\n",timeout); - - // unlock the SuperIO chip - outb(0x87,0x370); - outb(0x87,0x370); - - //select device Aux2 (device=8) and set watchdog regs F2, F3 and F4 - //F2 has the timeout in minutes - //F3 could be set to the POWER LED blink (with GP17 set to PowerLed) - // at timeout, and to reset timer on kbd/mouse activity (not now) - //F4 is used to just clear the TIMEOUT'ed state (bit 0) - + if (machine_is_netwinder()) + { + /* we have a hw bug somewhere, so each 977 minute is actually only 30sec + * this limits the max timeout to half of device max of 255 minutes... + */ + timeoutM += timeoutM; + } + + /* max timeout value = 255 minutes (0xFF). Write 0 to disable WatchDog. */ + if (timeoutM > 255) timeoutM = 255; + + /* convert seconds to minutes */ + printk(KERN_INFO "Wdt977 Watchdog activated: timeout = %d sec, nowayout = %i, testmode = %i.\n", + machine_is_netwinder() ? (timeoutM>>1)*60 : timeoutM*60, + nowayout, testmode); + + /* unlock the SuperIO chip */ + outb(0x87,0x370); + outb(0x87,0x370); + + /* select device Aux2 (device=8) and set watchdog regs F2, F3 and F4 + * F2 has the timeout in minutes + * F3 could be set to the POWER LED blink (with GP17 set to PowerLed) + * at timeout, and to reset timer on kbd/mouse activity (not impl.) + * F4 is used to just clear the TIMEOUT'ed state (bit 0) + */ outb(0x07,0x370); outb(0x08,0x371); outb(0xF2,0x370); - outb(timeout,0x371); + outb(timeoutM,0x371); outb(0xF3,0x370); - outb(0x00,0x371); //another setting is 0E for kbd/mouse/LED + outb(0x00,0x371); /* another setting is 0E for kbd/mouse/LED */ outb(0xF4,0x370); outb(0x00,0x371); - - //at last select device Aux1 (dev=7) and set GP16 as a watchdog output + + /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */ + /* in test mode watch the bit 1 on F4 to indicate "triggered" */ if (!testmode) { outb(0x07,0x370); @@ -78,9 +150,9 @@ static int wdt977_open(struct inode *ino outb(0xE6,0x370); outb(0x08,0x371); } - - // lock the SuperIO chip - outb(0xAA,0x370); + + /* lock the SuperIO chip */ + outb(0xAA,0x370); return 0; } @@ -89,82 +161,158 @@ static int wdt977_release(struct inode * { /* * Shut off the timer. - * Lock it in if it's a module and we defined ...NOWAYOUT + * Lock it in if it's a module and we set nowayout */ -#ifndef CONFIG_WATCHDOG_NOWAYOUT - lock_kernel(); + if (!nowayout) + { + lock_kernel(); - // unlock the SuperIO chip - outb(0x87,0x370); - outb(0x87,0x370); - - //select device Aux2 (device=8) and set watchdog regs F2,F3 and F4 - //F3 is reset to its default state - //F4 can clear the TIMEOUT'ed state (bit 0) - back to default - //We can not use GP17 as a PowerLed, as we use its usage as a RedLed - - outb(0x07,0x370); - outb(0x08,0x371); - outb(0xF2,0x370); - outb(0xFF,0x371); - outb(0xF3,0x370); - outb(0x00,0x371); - outb(0xF4,0x370); - outb(0x00,0x371); - outb(0xF2,0x370); - outb(0x00,0x371); - - //at last select device Aux1 (dev=7) and set GP16 as a watchdog output - outb(0x07,0x370); - outb(0x07,0x371); - outb(0xE6,0x370); - outb(0x08,0x371); - - // lock the SuperIO chip - outb(0xAA,0x370); + /* unlock the SuperIO chip */ + outb(0x87,0x370); + outb(0x87,0x370); + + /* select device Aux2 (device=8) and set watchdog regs F2,F3 and F4 + * F3 is reset to its default state + * F4 can clear the TIMEOUT'ed state (bit 0) - back to default + * We can not use GP17 as a PowerLed, as we use its usage as a RedLed + */ + outb(0x07,0x370); + outb(0x08,0x371); + outb(0xF2,0x370); + outb(0xFF,0x371); + outb(0xF3,0x370); + outb(0x00,0x371); + outb(0xF4,0x370); + outb(0x00,0x371); + outb(0xF2,0x370); + outb(0x00,0x371); - timer_alive=0; - unlock_kernel(); + /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */ + outb(0x07,0x370); + outb(0x07,0x371); + outb(0xE6,0x370); + outb(0x08,0x371); - printk(KERN_INFO "Watchdog: shutdown.\n"); -#endif + /* lock the SuperIO chip */ + outb(0xAA,0x370); + + timer_alive=0; + unlock_kernel(); + + printk(KERN_INFO "Wdt977 Watchdog: shutdown\n"); + } return 0; } -static ssize_t wdt977_write(struct file *file, const char *data, size_t len, loff_t *ppos) + +/* + * wdt977_write: + * @file: file handle to the watchdog + * @buf: buffer to write (unused as data does not matter here + * @count: count of bytes + * @ppos: pointer to the position to write. No seeks allowed + * + * A write to a watchdog device is defined as a keepalive signal. Any + * write of data will do, as we we don't define content meaning. + */ + +static ssize_t wdt977_write(struct file *file, const char *buf, size_t count, loff_t *ppos) { + /* Can't seek (pwrite) on this device */ + if (ppos != &file->f_pos) + return -ESPIPE; - //max timeout value = 255 minutes (0xFF). Write 0 to disable WatchDog. - if (timeout>255) - timeout = 255; + if(count) + { + kick_wdog(); + return 1; + } + return 0; +} - /* - * Refresh the timer. - */ - - //we have a hw bug somewhere, so each 977 minute is actually only 30sec - //as such limit the max timeout to half of max of 255 minutes... -// if (timeout>126) -// timeout = 126; - - // unlock the SuperIO chip - outb(0x87,0x370); - outb(0x87,0x370); - - //select device Aux2 (device=8) and kicks watchdog reg F2 - //F2 has the timeout in minutes - - outb(0x07,0x370); - outb(0x08,0x371); - outb(0xF2,0x370); - outb(timeout,0x371); - - // lock the SuperIO chip - outb(0xAA,0x370); - - return 1; +/* + * wdt977_ioctl: + * @inode: inode of the device + * @file: file handle to the device + * @cmd: watchdog command + * @arg: argument pointer + * + * The watchdog API defines a common set of functions for all watchdogs + * according to their available features. + */ + +static int wdt977_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ +static struct watchdog_info ident = { + identity : "Winbond 83977" +}; + +int temp; + + switch(cmd) + { + default: + return -ENOTTY; + + case WDIOC_GETSUPPORT: + return copy_to_user((struct watchdog_info *)arg, &ident, + sizeof(ident)) ? -EFAULT : 0; + + case WDIOC_GETBOOTSTATUS: + return put_user(0, (int *) arg); + + case WDIOC_GETSTATUS: + /* unlock the SuperIO chip */ + outb(0x87,0x370); + outb(0x87,0x370); + + /* select device Aux2 (device=8) and read watchdog reg F4 */ + outb(0x07,0x370); + outb(0x08,0x371); + outb(0xF4,0x370); + temp = inb(0x371); + + /* lock the SuperIO chip */ + outb(0xAA,0x370); + + /* return info if "expired" in test mode */ + return put_user(temp & 1, (int *) arg); + + case WDIOC_KEEPALIVE: + kick_wdog(); + return 0; + + case WDIOC_SETTIMEOUT: + if (copy_from_user(&temp, (int *) arg, sizeof(int))) + return -EFAULT; + + /* convert seconds to minutes, rounding up */ + temp += 59; + temp /= 60; + + /* we have a hw bug somewhere, so each 977 minute is actually only 30sec + * this limits the max timeout to half of device max of 255 minutes... + */ + if (machine_is_netwinder()) + { + temp += temp; + } + + /* Sanity check */ + if (temp < 0 || temp > 255) + return -EINVAL; + + if (!temp && nowayout) + return -EINVAL; + + timeoutM = temp; + kick_wdog(); + return 0; + } } + static struct file_operations wdt977_fops= { owner: THIS_MODULE, @@ -169,6 +317,7 @@ static struct file_operations wdt977_fop { owner: THIS_MODULE, write: wdt977_write, + ioctl: wdt977_ioctl, open: wdt977_open, release: wdt977_release, }; @@ -186,9 +335,9 @@ static int __init nwwatchdog_init(void) return -ENODEV; misc_register(&wdt977_miscdev); - printk(KERN_INFO "NetWinder Watchdog sleeping.\n"); + printk(KERN_INFO "Wdt977 Watchdog sleeping.\n"); return 0; -} +} static void __exit nwwatchdog_exit(void) { diff -BurNp --exclude-from=/home/mdomsch/excludes linux-2.4.18-pre7/drivers/char/wdt_pci.c linux/drivers/char/wdt_pci.c --- linux-2.4.18-pre7/drivers/char/wdt_pci.c Tue Jan 29 12:55:48 2002 +++ linux/drivers/char/wdt_pci.c Tue Jan 29 16:06:32 2002 @@ -15,7 +15,7 @@ * * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk> * - * Release 0.08. + * Release 0.10. * * Fixes * Dave Gregorich : Modularisation and minor bugs @@ -31,6 +31,7 @@ * Jeff Garzik : PCI cleanups * Tigran Aivazian : Restructured wdtpci_init_one() to handle failures * Joel Becker : Added WDIOC_GET/SETTIMEOUT + * Matt Domsch : added nowayout and timeout module options */ #include <linux/config.h> @@ -85,7 +86,32 @@ static int irq=11; /* Default timeout */ #define WD_TIMO (100*60) /* 1 minute */ -static int wd_margin = WD_TIMO; +static int timeout_val = WD_TIMO; /* value passed to card */ +static int timeout = 60; /* in seconds */ +MODULE_PARM(timeout,"i"); +MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default=60)"); + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int nowayout = 1; +#else +static int nowayout = 0; +#endif + +MODULE_PARM(nowayout,"i"); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + +static int +wdtpci_validate_timeout(void) +{ + /* Arbitrary, can't find the card's limits */ + if (timeout < 0 || timeout > 60) { + timeout = 60; + timeout_val = WD_TIMO; + return -EINVAL; + } + timeout_val = timeout * 100; + return 0; +} #ifndef MODULE @@ -236,7 +262,7 @@ static void wdtpci_ping(void) /* Write a watchdog value */ inb_p(WDT_DC); wdtpci_ctr_mode(1,2); - wdtpci_ctr_load(1,wd_margin); /* Timeout */ + wdtpci_ctr_load(1,timeout_val); /* Timeout */ outb_p(0, WDT_DC); } @@ -314,7 +340,7 @@ static ssize_t wdtpci_read(struct file * static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { - int new_margin; + int rc; static struct watchdog_info ident= { WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER @@ -340,16 +366,14 @@ static int wdtpci_ioctl(struct inode *in wdtpci_ping(); return 0; case WDIOC_SETTIMEOUT: - if (get_user(new_margin, (int *)arg)) + if (get_user(timeout, (int *)arg)) return -EFAULT; - /* Arbitrary, can't find the card's limits */ - if ((new_margin < 0) || (new_margin > 60)) - return -EINVAL; - wd_margin = new_margin * 100; + rc = wdtpci_validate_timeout(); + if (rc) return rc; wdtpci_ping(); /* Fall */ case WDIOC_GETTIMEOUT: - return put_user(wd_margin, (int *)arg); + return put_user(timeout, (int *)arg); } } @@ -372,9 +396,9 @@ static int wdtpci_open(struct inode *ino case WATCHDOG_MINOR: if(wdt_is_open) return -EBUSY; -#ifdef CONFIG_WATCHDOG_NOWAYOUT - MOD_INC_USE_COUNT; -#endif + if (nowayout) { + MOD_INC_USE_COUNT; + } /* * Activate */ @@ -402,7 +426,7 @@ static int wdtpci_open(struct inode *ino wdtpci_ctr_mode(1,2); wdtpci_ctr_mode(2,1); wdtpci_ctr_load(0,20833); /* count at 100Hz */ - wdtpci_ctr_load(1,wd_margin);/* Timeout 60 seconds */ + wdtpci_ctr_load(1,timeout_val); /* Timeout */ /* DO NOT LOAD CTR2 on PCI card! -- JPN */ outb_p(0, WDT_DC); /* Enable */ return 0; @@ -430,10 +454,10 @@ static int wdtpci_release(struct inode * if(MINOR(inode->i_rdev)==WATCHDOG_MINOR) { lock_kernel(); -#ifndef CONFIG_WATCHDOG_NOWAYOUT - inb_p(WDT_DC); /* Disable counters */ - wdtpci_ctr_load(2,0); /* 0 length reset pulses now */ -#endif + if (!nowayout) { + inb_p(WDT_DC); /* Disable counters */ + wdtpci_ctr_load(2,0); /* 0 length reset pulses now */ + } wdt_is_open=0; unlock_kernel(); } @@ -636,6 +660,8 @@ static int __init wdtpci_init(void) if (rc < 1) return -ENODEV; + + wdtpci_validate_timeout(); return 0; }
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