GIT 56ad7d849ee2d2b374345dcef2d8e63370496789 git+ssh://master.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog-mm.git commit 56ad7d849ee2d2b374345dcef2d8e63370496789 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - Kconfig patch Update Kconfig for the w83697hf/hg watchdog driver. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit ee28486c95b58619c8dd0e1fc5405f4e2ca8b763 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 16 This is patch 16 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - Add copyright notice for Samuel Tardieu also. This is the last patch in this series. The original description for Samuel's driver was: driver for the Winbond W83697HF/W83697HG watchdog timer The Winbond SuperIO W83697HF/HG includes a watchdog that can count from 1 to 255 seconds (or minutes). This drivers allows the seconds mode to be used. It exposes a standard /dev/watchdog interface. This chip is currently being used on some motherboards designed by VIA. By default, the module looks for a chip at I/O port 0x2e. The chip can be configured to be at 0x4e on some motherboards, the address can be chosen using the wdt_io module parameter. Using 0 will try to autodetect the address. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 068990b11c8bdb177d187f4966cd58629c9e0022 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 15 This is patch 15 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - Clean-up initialization code - part 2: * the line reading "set second mode & disable keyboard ..." is plain wrong, the register being manipulated (CRF4) is the counter itself, not the control byte (CRF3) -- looks like it has been copied from another driver. * I think garbage is being written in CRF3 (the control word) as the timeout value is being stored in this register (such as 60 for 60 seconds). * We only want to set pin 119 to WDTO# mode and leave the rest of CR29 like it is. * Set count mode to seconds and not minutes. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 534096b34a6f77a5399d56e46f0a0f7491848a36 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 14 This is patch 14 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - Clean-up initialization code (part 1: remove w83697hf_select_wd_register() and w83697hf_unselect_wd_register() functions). - Make sure that the watchdog device is stopped as soon as we found it. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit a9aef3c8c5d02a3203f018cfa5d21f8eb9630e33 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 13 This is patch 13 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - Remove wdt_ctrl (it has been replaced with the w83697hf_write_timeout() function) and redo/clean-up the start/stop/ping code. - Make sure that the watchdog is enabled or disabled When starting or stoping the device (with a call to w83697hf_set_reg(0x30, ?); ). Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit be17bc83c8324fc934d0421733cf9af87ef38506 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 12 This is patch 12 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - Add w83697hf_write_timeout() to set the watchdog's timeout value. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit c2a3fdddc0d507e8520561cb418942f6eec97cd1 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 11 This is patch 11 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - Add w83697hf_select_wdt() and w83697hf_deselect_wdt() so that the start/stop/ping code can directly talk to the watchdog. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit f85e6e15f636527801ca15427ae15d39068ab5b9 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 10 This is patch 10 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - check whether the device is really present (we *can* probe for the device now). Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit bce4a28d21b0c21572162ebce179c073946cce21 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 9 This is patch 9 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - add w83697hf_get_reg() and w83697hf_set_reg() functions. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 580ce670d18cdba465ace62f4b99b6ff34b3908f Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 8 This is patch 8 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - add w83697hf_lock function to leave the chipsets extended function mode. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 7c1e099511bd37b48fe2a02e8b793679dd27a3e6 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 7 This is patch 7 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - add w83697hf_unlock function to enter the chipsets extended function mode. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 1ebb6c7560e5f01e13429e22383f116e220eb088 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 6 This is patch 6 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - The driver works for both the w83697hf and the w83697hg chipset's. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 9c5c474ca2822e2986c1563b336efc0833b6769a Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 5 This is patch 5 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - Rename the Extended Function Registers to the names used in the data-sheet. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 1748d1f561daaf9041c8f992926cdfbafa44e2d8 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 4 This is patch 4 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - limits the watchdog timeout to 1-63 while this device accepts 1-255. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 250e8e0e0578b7623aadc4eb9c98be96d61652fd Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 3 This is patch 3 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - Fix identation. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 3a4be8ffa5620ac85759e63b7c51326aee7e3bdd Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 2 This is patch 2 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - wdt_io is 2 bytes long. We should do a request_region for 2 bytes instead of 1. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit 2a6d940f71942206de9eca60a19d401827cd4e54 Author: Samuel Tardieu Date: Thu Sep 7 11:57:00 2006 +0200 [WATCHDOG] w83697hf/hg WDT driver - patch 1 This is patch 1 in the series of patches that converts Marcus Junker's w83697hf watchdog driver to Samuel Tardieau's w83697hf/hg watchdog driver. This patch contains following changes: - the note concerning tyan motherboards has been copied from another driver, This doesn't apply here. - the comments concerning CRF6 are wrong as CRF3 is manipulated and CRF6 is never read nor written. - the comments concerning CRF5 are wrong as CRF4 is manipulated and CRF5 is never read nor written. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck commit e386099f4842c9f72f3e79ec5a0746fbb5b9bfa5 Author: Wim Van Sebroeck Date: Wed Sep 13 21:27:29 2006 +0200 [WATCHDOG] use ENOTTY instead of ENOIOCTLCMD in ioctl() Return ENOTTY instead of ENOIOCTLCMD in user-visible ioctl() results The watchdog drivers used to return ENOIOCTLCMD for bad ioctl() commands. ENOIOCTLCMD should not be visible by the user, so use ENOTTY instead. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck Acked-by: Alan Cox Signed-off-by: Andrew Morton commit 3245d743e63a548773c54764fdf3832770f52bfd Author: Samuel Tardieu Date: Sat Sep 9 17:34:31 2006 +0200 [WATCHDOG] use ENOTTY instead of ENOIOCTLCMD in ioctl() Return ENOTTY instead of ENOIOCTLCMD in user-visible ioctl() results The watchdog drivers used to return ENOIOCTLCMD for bad ioctl() commands. ENOIOCTLCMD should not be visible by the user, so use ENOTTY instead. Signed-off-by: Samuel Tardieu Signed-off-by: Wim Van Sebroeck Acked-by: Alan Cox Signed-off-by: Andrew Morton commit 5c4968f163cd7362c88401a990db96378b5f9587 Author: Vitaly Wool Date: Mon Sep 11 14:42:39 2006 +0400 [WATCHDOG] pnx4008: add cpu_relax() Added cpu_relax as suggested by Alan Cox. Signed-off-by: Vitaly Wool Signed-off-by: Wim Van Sebroeck commit 1df90062cf9d0176e14eae2805b3d0ff434af19d Author: Wim Van Sebroeck Date: Sun Sep 10 12:48:15 2006 +0200 [WATCHDOG] pnx4008_wdt.c - spinlock fixes. Add io spinlocks to prevent possible race conditions between start and stop operations that are issued from different child processes where the master process opened /dev/watchdog. Signed-off-by: Wim Van Sebroeck commit 1a4b73eaf3b706c3768c99f41c54383b34d0374e Author: Ben Dooks Date: Wed Sep 6 12:24:35 2006 +0100 [WATCHDOG] s3c24XX nowayout If the driver is not configured for `no way out`, then the open method should not automatically allow the setting of allow_close to CLOSE_STATE_ALLOW. The setting of allow_close nullifies the use of the magic close via the write path. It means that in the default state, the watchdog will shut-down even if the magic close has not been issued. Signed-off-by: Ben Dooks commit 2cafe468176ee35eeab77491a6c31e58c694e1b8 Author: Wim Van Sebroeck Date: Sat Sep 2 20:53:19 2006 +0200 [WATCHDOG] Winbond SMsC37B787 watchdog fixes * Added io spinlocking * Deleted WATCHDOG_MINOR (it's in the miscdevice include * Changed timer_enabled to use set_bit functions * WDIOC_GETSUPPORT should return -EFAULT or 0 * timeout should be correct before we initialize the watchdog * we should initialize the watchdog before we give access to userspace * Third parameter of module_param is not the default or initial value Signed-off-by: Wim Van Sebroeck commit 7889e72c5e8d9ab9e773637f0b084a28f9347d1f Author: Wim Van Sebroeck Date: Sat Sep 2 19:32:26 2006 +0200 [WATCHDOG] Winbond SMsC37B787 - remove trailing whitespace Remove trailing whitespace. Signed-off-by: Wim Van Sebroeck commit e9095936fcd85894c9701c62222f84d0b12647af Author: Sven Anders Date: Thu Aug 24 17:11:50 2006 +0200 [WATCHDOG] Winbond SMsC37B787 watchdog driver New watchdog driver for the Winbond SMsC37B787 chipset. Signed-off-by: Sven Anders Signed-off-by: Wim Van Sebroeck commit ab11b32c940490f2d2d3c4f57d71308845f6ad6b Author: Wim Van Sebroeck Date: Sat Sep 2 19:04:02 2006 +0200 [WATCHDOG] Kconfig clean up fixed some more trailing spaces. Signed-off-by: Wim Van Sebroeck commit e61724ff112251bb30b257e023469e8ed746a820 Author: Wim Van Sebroeck Date: Sat Sep 2 18:50:20 2006 +0200 [WATCHDOG] w836?7hf_wdt spinlock fixes. Add io spinlocks to prevent possible race conditions between start and stop operations that are issued from different child processes where the master process opened /dev/watchdog. Signed-off-by: Wim Van Sebroeck commit 257543ccc2edc7a782b9572be961129a306946d1 Author: Wim Van Sebroeck Date: Sat Sep 2 17:59:54 2006 +0200 [WATCHDOG] Kconfig clean-up * fix typo's according to spellings checker * Fix some leading and trailing spaces Signed-off-by: Wim Van Sebroeck commit d19ea38e6e99c4924c894cb54440e242179bf27d Author: Marcus Junker Date: Thu Aug 24 17:11:50 2006 +0200 [WATCHDOG] w83697hf WDT driver New watchdog driver for the Winbond W83697HF chipset. Signed-off-by: Marcus Junker Signed-off-by: Wim Van Sebroeck commit 01f8698e9a9983d5206dbd29a4fb0b89e3570b57 Author: Wim Van Sebroeck Date: Sun Jul 30 20:06:07 2006 +0200 [WATCHDOG] pnx4008_wdt.c - remove patch Change remove code so that we first detach the driver from userspace, then clean up the clock and then clean up the memory we allocated. Signed-off-by: Wim Van Sebroeck commit 0bd9c842cc6c779a29c12aef0ef521b61ae7bdf5 Author: Wim Van Sebroeck Date: Mon Jul 3 09:03:47 2006 +0200 [WATCHDOG] pnx4008_wdt.c - nowayout patch Change nowayout to: WATCHDOG_NOWAYOUT as defined in include/linux/watchdog.h . Signed-off-by: Wim Van Sebroeck commit 34150b94c2e7e3177803b51e86077acf3a0750b5 Author: Vitaly Wool Date: Mon Jun 26 19:31:49 2006 +0400 [WATCHDOG] pnx4008: add watchdog support Add watchdog support for Philips PNX4008 ARM board inlined. Signed-off-by: Vitaly Wool Signed-off-by: Wim Van Sebroeck commit c9c87d841efdf38d1f3cf96f35d5106170ba0b68 Author: Wim Van Sebroeck Date: Sat Aug 5 20:59:01 2006 +0200 [WATCHDOG] iTCO_wdt.c shutdown patch Since we are using the device driver model, we don't need to arrange the shutdown via a reboot_notifier. Signed-off-by: Wim Van Sebroeck commit 0af4a4b7d890331984a4b48517710f6a46d4a8a4 Author: Wim Van Sebroeck Date: Wed Jul 19 22:39:13 2006 +0200 [WATCHDOG] iTCO_wdt.c - pci_dev_put fix for_each_pci_dev calls pci_get_device (and thus it calls pci_dev_get). So we need to do a pci_dev_put to keep the refcounting correct. (Thanks to Jiri Slaby ) Signed-off-by: Wim Van Sebroeck commit bccea7eda3b84bb8652cf1228940877b48aca00d Author: Wim Van Sebroeck Date: Fri Jun 30 08:44:53 2006 +0200 [WATCHDOG] iTCO_wdt (Intel TCO Timer) driver Convert the iTCO_wdt driver to a platform device driver. Signed-off-by: Wim Van Sebroeck commit cf30225b01ff1c7d07ebc7905e98affe12de7b1c Author: Wim Van Sebroeck Date: Sun May 21 14:37:44 2006 +0200 [WATCHDOG] iTCO_wdt (Intel TCO Timer) driver Hardware driver for the intel TCO timer based watchdog devices. These drivers are included in the Intel 82801 I/O Controller Hub family (from ICH0 up to ICH7) and in the Intel 6300ESB controller hub. This driver will replace the i8xx_tco.c driver. Signed-off-by: Wim Van Sebroeck commit 94f9d9566d8045a89850ea8398363e94b0501260 Author: Dave Jones Date: Tue Aug 1 20:06:43 2006 +0200 [WATCHDOG] improve machzwd detection On a machine with no machzwd, loading the module prints out.. machzwd: MachZ ZF-Logic Watchdog driver initializing. 0xffff machzwd: Watchdog using action = RESET - the 0xffff printk is unnecessary - 0xffff seems to be 'hardware not present' - fix CodingStyle. (This driver could use some more work here) Signed-off-by: Dave Jones Signed-off-by: Wim Van Sebroeck Signed-off-by: Andrew Morton commit aac7ba145ede567197caf4c17ece7886694a8e8e Author: Jiri Slaby Date: Wed Jul 19 02:18:23 2006 +0159 [WATCHDOG] i8xx_tco remove pci_find_device. Use refcounting for pci device obtaining. Use PCI_DEVICE macro. Signed-off-by: Jiri Slaby Signed-off-by: Wim Van Sebroeck Cc: Andrew Morton commit 93ae7d9b94f591c4975ac42453feaea00760e5e5 Author: Jiri Slaby Date: Tue Jul 18 18:29:00 2006 +0159 [WATCHDOG] alim remove pci_find_device Convert pci_find_device to pci_get_device + pci_dev_put in alim watchdog cards' drivers (refcounting). Signed-off-by: Jiri Slaby Signed-off-by: Wim Van Sebroeck Signed-off-by: Andrew Morton commit ecd22ffa7256ed3479e909ceb079f805d8a1593b Author: Ian E. Morgan Date: Tue Aug 29 13:06:46 2006 -0400 [WATCHDOG] wbc8360.c module parameter patch The last argument of module_param is permissions, not default value. From: "Ian E. Morgan" Signed-off-by: Wim Van Sebroeck Signed-off-by: Andrew Morton Signed-off-by: Andrew Morton --- drivers/char/watchdog/Kconfig | 87 ++ drivers/char/watchdog/Makefile | 3 drivers/char/watchdog/iTCO_wdt.c | 735 +++++++++++++++++++++++ drivers/char/watchdog/smsc37b787_wdt.c | 627 +++++++++++++++++++ drivers/char/watchdog/w83627hf_wdt.c | 8 drivers/char/watchdog/w83697hf_wdt.c | 448 ++++++++++++++ 6 files changed, 1899 insertions(+), 9 deletions(-) diff -puN drivers/char/watchdog/Kconfig~git-watchdog drivers/char/watchdog/Kconfig --- a/drivers/char/watchdog/Kconfig~git-watchdog +++ a/drivers/char/watchdog/Kconfig @@ -13,7 +13,7 @@ config WATCHDOG subsequently opening the file and then failing to write to it for longer than 1 minute will result in rebooting the machine. This could be useful for a networked machine that needs to come back - online as fast as possible after a lock-up. There's both a watchdog + on-line as fast as possible after a lock-up. There's both a watchdog implementation entirely in software (which can sometimes fail to reboot the machine) and a driver for hardware watchdog boards, which are more robust and can also keep track of the temperature inside @@ -71,7 +71,7 @@ config 21285_WATCHDOG tristate "DC21285 watchdog" depends on WATCHDOG && FOOTBRIDGE help - The Intel Footbridge chip contains a builtin watchdog circuit. Say Y + The Intel Footbridge chip contains a built-in watchdog circuit. Say Y here if you wish to use this. Alternatively say M to compile the driver as a module, which will be called wdt285. @@ -165,6 +165,7 @@ config EP93XX_WATCHDOG To compile this driver as a module, choose M here: the module will be called ep93xx_wdt. +<<<<<<< HEAD/drivers/char/watchdog/Kconfig config OMAP_WATCHDOG tristate "OMAP Watchdog" depends on WATCHDOG && (ARCH_OMAP16XX || ARCH_OMAP24XX) @@ -183,6 +184,19 @@ config PNX4008_WATCHDOG Say N if you are unsure. +======= +config PNX4008_WATCHDOG + tristate "PNX4008 Watchdog" + depends on WATCHDOG && ARCH_PNX4008 + help + Say Y here if to include support for the watchdog timer + in the PNX4008 processor. + This driver can be built as a module by choosing M. The module + will be called pnx4008_wdt. + + Say N if you are unsure. + +>>>>>>> /drivers/char/watchdog/Kconfig # X86 (i386 + ia64 + x86_64) Architecture config ACQUIRE_WDT @@ -269,11 +283,11 @@ config IB700_WDT Most people will say N. config IBMASR - tristate "IBM Automatic Server Restart" - depends on WATCHDOG && X86 - help + tristate "IBM Automatic Server Restart" + depends on WATCHDOG && X86 + help This is the driver for the IBM Automatic Server Restart watchdog - timer builtin into some eServer xSeries machines. + timer built-in into some eServer xSeries machines. To compile this driver as a module, choose M here: the module will be called ibmasr. @@ -316,6 +330,27 @@ config I8XX_TCO To compile this driver as a module, choose M here: the module will be called i8xx_tco. +config ITCO_WDT + tristate "Intel TCO Timer/Watchdog (EXPERIMENTAL)" + depends on WATCHDOG && (X86 || IA64) && PCI && EXPERIMENTAL + ---help--- + Hardware driver for the intel TCO timer based watchdog devices. + These drivers are included in the Intel 82801 I/O Controller + Hub family 'from ICH0 up to ICH7) and in the Intel 6300ESB + controller hub. + + The TCO (Total Cost of Ownership) timer is a watchdog timer + that will reboot the machine after its second expiration. The + expiration time can be configured with the "heartbeat" parameter. + + On some motherboards the driver may fail to reset the chipset's + NO_REBOOT flag which prevents the watchdog from rebooting the + machine. If this is the case you will get a kernel message like + "failed to reset NO_REBOOT flag, reboot disabled by hardware". + + To compile this driver as a module, choose M here: the + module will be called iTCO_wdt. + config SC1200_WDT tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog" depends on WATCHDOG && X86 @@ -374,6 +409,26 @@ config CPU5_WDT To compile this driver as a module, choose M here: the module will be called cpu5wdt. +config SMSC37B787_WDT + tristate "Winbond SMsC37B787 Watchdog Timer" + depends on WATCHDOG && X86 + ---help--- + This is the driver for the hardware watchdog component on the + Winbond SMsC37B787 chipset as used on the NetRunner Mainboard + from Vision Systems and maybe others. + + This watchdog simply watches your kernel to make sure it doesn't + freeze, and if it does, it reboots your computer after a certain + amount of time. + + Usually a userspace daemon will notify the kernel WDT driver that + userspace is still alive, at regular intervals. + + To compile this driver as a module, choose M here: the + module will be called smsc37b787_wdt. + + Most people will say N. + config W83627HF_WDT tristate "W83627HF Watchdog Timer" depends on WATCHDOG && X86 @@ -389,6 +444,21 @@ config W83627HF_WDT Most people will say N. +config W83697HF_WDT + tristate "W83697HF/W83697HG Watchdog Timer" + depends on WATCHDOG && X86 + ---help--- + This is the driver for the hardware watchdog on the W83697HF/HG + chipset as used in Dedibox/VIA motherboards (and likely others). + This watchdog simply watches your kernel to make sure it doesn't + freeze, and if it does, it reboots your computer after a certain + amount of time. + + To compile this driver as a module, choose M here: the + module will be called w83697hf_wdt. + + Most people will say N. + config W83877F_WDT tristate "W83877F (EMACS) Watchdog Timer" depends on WATCHDOG && X86 @@ -422,7 +492,7 @@ config MACHZ_WDT depends on WATCHDOG && X86 ---help--- If you are using a ZF Micro MachZ processor, say Y here, otherwise - N. This is the driver for the watchdog timer builtin on that + N. This is the driver for the watchdog timer built-in on that processor using ZF-Logic interface. This watchdog simply watches your kernel to make sure it doesn't freeze, and if it does, it reboots your computer after a certain amount of time. @@ -451,7 +521,6 @@ config SBC_EPX_C3_WATCHDOG To compile this driver as a module, choose M here: the module will be called sbc_epx_c3. - # PowerPC Architecture config 8xx_WDT @@ -481,7 +550,7 @@ config WATCHDOG_RTAS help This driver adds watchdog support for the RTAS watchdog. - To compile this driver as a module, choose M here. The module + To compile this driver as a module, choose M here. The module will be called wdrtas. # MIPS Architecture diff -puN drivers/char/watchdog/Makefile~git-watchdog drivers/char/watchdog/Makefile --- a/drivers/char/watchdog/Makefile~git-watchdog +++ a/drivers/char/watchdog/Makefile @@ -47,12 +47,15 @@ obj-$(CONFIG_IBMASR) += ibmasr.o obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o obj-$(CONFIG_I6300ESB_WDT) += i6300esb.o obj-$(CONFIG_I8XX_TCO) += i8xx_tco.o +obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o obj-$(CONFIG_SBC8360_WDT) += sbc8360.o obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o +obj-$(CONFIG_SMSC37B787_WDT) += smsc37b787_wdt.o obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o +obj-$(CONFIG_W83697HF_WDT) += w83697hf_wdt.o obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o obj-$(CONFIG_MACHZ_WDT) += machzwd.o diff -puN /dev/null drivers/char/watchdog/iTCO_wdt.c --- /dev/null +++ a/drivers/char/watchdog/iTCO_wdt.c @@ -0,0 +1,735 @@ +/* + * intel TCO Watchdog Driver (Used in i82801 and i6300ESB chipsets) + * + * (c) Copyright 2006 Wim Van Sebroeck . + * + * 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. + * + * The TCO watchdog is implemented in the following I/O controller hubs: + * (See the intel documentation on http://developer.intel.com.) + * 82801AA (ICH) : document number 290655-003, 290677-014, + * 82801AB (ICHO) : document number 290655-003, 290677-014, + * 82801BA (ICH2) : document number 290687-002, 298242-027, + * 82801BAM (ICH2-M) : document number 290687-002, 298242-027, + * 82801CA (ICH3-S) : document number 290733-003, 290739-013, + * 82801CAM (ICH3-M) : document number 290716-001, 290718-007, + * 82801DB (ICH4) : document number 290744-001, 290745-020, + * 82801DBM (ICH4-M) : document number 252337-001, 252663-005, + * 82801E (C-ICH) : document number 273599-001, 273645-002, + * 82801EB (ICH5) : document number 252516-001, 252517-003, + * 82801ER (ICH5R) : document number 252516-001, 252517-003, + * 82801FB (ICH6) : document number 301473-002, 301474-007, + * 82801FR (ICH6R) : document number 301473-002, 301474-007, + * 82801FBM (ICH6-M) : document number 301473-002, 301474-007, + * 82801FW (ICH6W) : document number 301473-001, 301474-007, + * 82801FRW (ICH6RW) : document number 301473-001, 301474-007, + * 82801GB (ICH7) : document number 307013-002, 307014-009, + * 82801GR (ICH7R) : document number 307013-002, 307014-009, + * 82801GDH (ICH7DH) : document number 307013-002, 307014-009, + * 82801GBM (ICH7-M) : document number 307013-002, 307014-009, + * 82801GHM (ICH7-M DH) : document number 307013-002, 307014-009, + * 6300ESB (6300ESB) : document number 300641-003 + */ + +/* + * Includes, defines, variables, module parameters, ... + */ + +/* Module and version information */ +#define DRV_NAME "iTCO_wdt" +#define DRV_VERSION "1.00" +#define DRV_RELDATE "30-Jul-2006" +#define PFX DRV_NAME ": " + +/* Includes */ +#include /* For CONFIG_WATCHDOG_NOWAYOUT/... */ +#include /* For module specific items */ +#include /* For new moduleparam's */ +#include /* For standard types (like size_t) */ +#include /* For the -ENODEV/... values */ +#include /* For printk/panic/... */ +#include /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ +#include /* For the watchdog specific items */ +#include /* For __init/__exit/... */ +#include /* For file operations */ +#include /* For platform_driver framework */ +#include /* For pci functions */ +#include /* For io-port access */ +#include /* For spin_lock/spin_unlock/... */ + +#include /* For copy_to_user/put_user/... */ +#include /* For inb/outb/... */ + +/* TCO related info */ +enum iTCO_chipsets { + TCO_ICH = 0, /* ICH */ + TCO_ICH0, /* ICH0 */ + TCO_ICH2, /* ICH2 */ + TCO_ICH2M, /* ICH2-M */ + TCO_ICH3, /* ICH3-S */ + TCO_ICH3M, /* ICH3-M */ + TCO_ICH4, /* ICH4 */ + TCO_ICH4M, /* ICH4-M */ + TCO_CICH, /* C-ICH */ + TCO_ICH5, /* ICH5 & ICH5R */ + TCO_6300ESB, /* 6300ESB */ + TCO_ICH6, /* ICH6 & ICH6R */ + TCO_ICH6M, /* ICH6-M */ + TCO_ICH6W, /* ICH6W & ICH6RW */ + TCO_ICH7, /* ICH7 & ICH7R */ + TCO_ICH7M, /* ICH7-M */ + TCO_ICH7MDH, /* ICH7-M DH */ +}; + +static struct { + char *name; + unsigned int iTCO_version; +} iTCO_chipset_info[] __devinitdata = { + {"ICH", 1}, + {"ICH0", 1}, + {"ICH2", 1}, + {"ICH2-M", 1}, + {"ICH3-S", 1}, + {"ICH3-M", 1}, + {"ICH4", 1}, + {"ICH4-M", 1}, + {"C-ICH", 1}, + {"ICH5 or ICH5R", 1}, + {"6300ESB", 1}, + {"ICH6 or ICH6R", 2}, + {"ICH6-M", 2}, + {"ICH6W or ICH6RW", 2}, + {"ICH7 or ICH7R", 2}, + {"ICH7-M", 2}, + {"ICH7-M DH", 2}, + {NULL,0} +}; + +/* + * This data only exists for exporting the supported PCI ids + * via MODULE_DEVICE_TABLE. We do not actually register a + * pci_driver, because the I/O Controller Hub has also other + * functions that probably will be registered by other drivers. + */ +static struct pci_device_id iTCO_wdt_pci_tbl[] = { + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH0 }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH2 }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_10, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH2M }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH3 }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH3M }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH4 }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH4M }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801E_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_CICH }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH5 }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_6300ESB }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6 }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6M }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6W }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7 }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7M }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7MDH }, + { 0, }, /* End of list */ +}; +MODULE_DEVICE_TABLE (pci, iTCO_wdt_pci_tbl); + +/* Address definitions for the TCO */ +#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60 /* TCO base address */ +#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30 /* SMI Control and Enable Register */ + +#define TCO_RLD TCOBASE + 0x00 /* TCO Timer Reload and Current Value */ +#define TCOv1_TMR TCOBASE + 0x01 /* TCOv1 Timer Initial Value */ +#define TCO_DAT_IN TCOBASE + 0x02 /* TCO Data In Register */ +#define TCO_DAT_OUT TCOBASE + 0x03 /* TCO Data Out Register */ +#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */ +#define TCO2_STS TCOBASE + 0x06 /* TCO2 Status Register */ +#define TCO1_CNT TCOBASE + 0x08 /* TCO1 Control Register */ +#define TCO2_CNT TCOBASE + 0x0a /* TCO2 Control Register */ +#define TCOv2_TMR TCOBASE + 0x12 /* TCOv2 Timer Initial Value */ + +/* internal variables */ +static unsigned long is_active; +static char expect_release; +static struct { /* this is private data for the iTCO_wdt device */ + unsigned int iTCO_version; /* TCO version/generation */ + unsigned long ACPIBASE; /* The cards ACPIBASE address (TCOBASE = ACPIBASE+0x60) */ + unsigned long __iomem *gcs; /* NO_REBOOT flag is Memory-Mapped GCS register bit 5 (TCO version 2) */ + spinlock_t io_lock; /* the lock for io operations */ + struct pci_dev *pdev; /* the PCI-device */ +} iTCO_wdt_private; + +static struct platform_device *iTCO_wdt_platform_device; /* the watchdog platform device */ + +/* module parameters */ +#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */ +static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */ +module_param(heartbeat, int, 0); +MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2 0 = The TCO timer is enabled to count */ + val = inw(TCO1_CNT); + val &= 0xf7ff; + outw(val, TCO1_CNT); + val = inw(TCO1_CNT); + spin_unlock(&iTCO_wdt_private.io_lock); + + if (val & 0x0800) + return -1; + return 0; +} + +static int iTCO_wdt_stop(void) +{ + unsigned int val; + + spin_lock(&iTCO_wdt_private.io_lock); + + /* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */ + val = inw(TCO1_CNT); + val |= 0x0800; + outw(val, TCO1_CNT); + val = inw(TCO1_CNT); + + /* Set the NO_REBOOT bit to prevent later reboots, just for sure */ + iTCO_wdt_set_NO_REBOOT_bit(); + + spin_unlock(&iTCO_wdt_private.io_lock); + + if ((val & 0x0800) == 0) + return -1; + return 0; +} + +static int iTCO_wdt_keepalive(void) +{ + spin_lock(&iTCO_wdt_private.io_lock); + + /* Reload the timer by writing to the TCO Timer Counter register */ + if (iTCO_wdt_private.iTCO_version == 2) { + outw(0x01, TCO_RLD); + } else if (iTCO_wdt_private.iTCO_version == 1) { + outb(0x01, TCO_RLD); + } + + spin_unlock(&iTCO_wdt_private.io_lock); + return 0; +} + +static int iTCO_wdt_set_heartbeat(int t) +{ + unsigned int val16; + unsigned char val8; + unsigned int tmrval; + + tmrval = seconds_to_ticks(t); + /* from the specs: */ + /* "Values of 0h-3h are ignored and should not be attempted" */ + if (tmrval < 0x04) + return -EINVAL; + if (((iTCO_wdt_private.iTCO_version == 2) && (tmrval > 0x3ff)) || + ((iTCO_wdt_private.iTCO_version == 1) && (tmrval > 0x03f))) + return -EINVAL; + + /* Write new heartbeat to watchdog */ + if (iTCO_wdt_private.iTCO_version == 2) { + spin_lock(&iTCO_wdt_private.io_lock); + val16 = inw(TCOv2_TMR); + val16 &= 0xfc00; + val16 |= tmrval; + outw(val16, TCOv2_TMR); + val16 = inw(TCOv2_TMR); + spin_unlock(&iTCO_wdt_private.io_lock); + + if ((val16 & 0x3ff) != tmrval) + return -EINVAL; + } else if (iTCO_wdt_private.iTCO_version == 1) { + spin_lock(&iTCO_wdt_private.io_lock); + val8 = inb(TCOv1_TMR); + val8 &= 0xc0; + val8 |= (tmrval & 0xff); + outb(val8, TCOv1_TMR); + val8 = inb(TCOv1_TMR); + spin_unlock(&iTCO_wdt_private.io_lock); + + if ((val8 & 0x3f) != tmrval) + return -EINVAL; + } + + heartbeat = t; + return 0; +} + +static int iTCO_wdt_get_timeleft (int *time_left) +{ + unsigned int val16; + unsigned char val8; + + /* read the TCO Timer */ + if (iTCO_wdt_private.iTCO_version == 2) { + spin_lock(&iTCO_wdt_private.io_lock); + val16 = inw(TCO_RLD); + val16 &= 0x3ff; + spin_unlock(&iTCO_wdt_private.io_lock); + + *time_left = (val16 * 6) / 10; + } else if (iTCO_wdt_private.iTCO_version == 1) { + spin_lock(&iTCO_wdt_private.io_lock); + val8 = inb(TCO_RLD); + val8 &= 0x3f; + spin_unlock(&iTCO_wdt_private.io_lock); + + *time_left = (val8 * 6) / 10; + } + return 0; +} + +/* + * /dev/watchdog handling + */ + +static int iTCO_wdt_open (struct inode *inode, struct file *file) +{ + /* /dev/watchdog can only be opened once */ + if (test_and_set_bit(0, &is_active)) + return -EBUSY; + + /* + * Reload and activate timer + */ + iTCO_wdt_keepalive(); + iTCO_wdt_start(); + return nonseekable_open(inode, file); +} + +static int iTCO_wdt_release (struct inode *inode, struct file *file) +{ + /* + * Shut off the timer. + */ + if (expect_release == 42) { + iTCO_wdt_stop(); + } else { + printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); + iTCO_wdt_keepalive(); + } + clear_bit(0, &is_active); + expect_release = 0; + return 0; +} + +static ssize_t iTCO_wdt_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 */ + iTCO_wdt_keepalive(); + } + return len; +} + +static int iTCO_wdt_ioctl (struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + int new_options, retval = -EINVAL; + int new_heartbeat; + int time_left; + void __user *argp = (void __user *)arg; + int __user *p = argp; + static struct watchdog_info ident = { + .options = WDIOF_SETTIMEOUT | + WDIOF_KEEPALIVEPING | + WDIOF_MAGICCLOSE, + .firmware_version = 0, + .identity = DRV_NAME, + }; + + switch (cmd) { + case WDIOC_GETSUPPORT: + return copy_to_user(argp, &ident, + sizeof (ident)) ? -EFAULT : 0; + + case WDIOC_GETSTATUS: + case WDIOC_GETBOOTSTATUS: + return put_user(0, p); + + case WDIOC_KEEPALIVE: + iTCO_wdt_keepalive(); + return 0; + + case WDIOC_SETOPTIONS: + { + if (get_user(new_options, p)) + return -EFAULT; + + if (new_options & WDIOS_DISABLECARD) { + iTCO_wdt_stop(); + retval = 0; + } + + if (new_options & WDIOS_ENABLECARD) { + iTCO_wdt_keepalive(); + iTCO_wdt_start(); + retval = 0; + } + + return retval; + } + + case WDIOC_SETTIMEOUT: + { + if (get_user(new_heartbeat, p)) + return -EFAULT; + + if (iTCO_wdt_set_heartbeat(new_heartbeat)) + return -EINVAL; + + iTCO_wdt_keepalive(); + /* Fall */ + } + + case WDIOC_GETTIMEOUT: + return put_user(heartbeat, p); + + case WDIOC_GETTIMELEFT: + { + if (iTCO_wdt_get_timeleft(&time_left)) + return -EINVAL; + + return put_user(time_left, p); + } + + default: + return -ENOTTY; + } +} + +/* + * Kernel Interfaces + */ + +static struct file_operations iTCO_wdt_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = iTCO_wdt_write, + .ioctl = iTCO_wdt_ioctl, + .open = iTCO_wdt_open, + .release = iTCO_wdt_release, +}; + +static struct miscdevice iTCO_wdt_miscdev = { + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &iTCO_wdt_fops, +}; + +/* + * Init & exit routines + */ + +static int iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device_id *ent, struct platform_device *dev) +{ + int ret; + u32 base_address; + unsigned long RCBA; + unsigned long val32; + + /* + * Find the ACPI/PM base I/O address which is the base + * for the TCO registers (TCOBASE=ACPIBASE + 0x60) + * ACPIBASE is bits [15:7] from 0x40-0x43 + */ + pci_read_config_dword(pdev, 0x40, &base_address); + base_address &= 0x00007f80; + if (base_address == 0x00000000) { + /* Something's wrong here, ACPIBASE has to be set */ + printk(KERN_ERR PFX "failed to get TCOBASE address\n"); + pci_dev_put(pdev); + return -ENODEV; + } + iTCO_wdt_private.iTCO_version = iTCO_chipset_info[ent->driver_data].iTCO_version; + iTCO_wdt_private.ACPIBASE = base_address; + iTCO_wdt_private.pdev = pdev; + + /* Get the Memory-Mapped GCS register, we need it for the NO_REBOOT flag (TCO v2) */ + /* To get access to it you have to read RCBA from PCI Config space 0xf0 + and use it as base. GCS = RCBA + ICH6_GCS(0x3410). */ + if (iTCO_wdt_private.iTCO_version == 2) { + pci_read_config_dword(pdev, 0xf0, &base_address); + RCBA = base_address & 0xffffc000; + iTCO_wdt_private.gcs = ioremap((RCBA + 0x3410),4); + } + + /* Check chipset's NO_REBOOT bit */ + if (iTCO_wdt_unset_NO_REBOOT_bit()) { + printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n"); + ret = -ENODEV; /* Cannot reset NO_REBOOT bit */ + goto out; + } + + /* Set the NO_REBOOT bit to prevent later reboots, just for sure */ + iTCO_wdt_set_NO_REBOOT_bit(); + + /* Set the TCO_EN bit in SMI_EN register */ + if (!request_region(SMI_EN, 4, "iTCO_wdt")) { + printk(KERN_ERR PFX "I/O address 0x%04lx already in use\n", + SMI_EN ); + ret = -EIO; + goto out; + } + val32 = inl(SMI_EN); + val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */ + outl(val32, SMI_EN); + release_region(SMI_EN, 4); + + /* The TCO I/O registers reside in a 32-byte range pointed to by the TCOBASE value */ + if (!request_region (TCOBASE, 0x20, "iTCO_wdt")) { + printk (KERN_ERR PFX "I/O address 0x%04lx already in use\n", + TCOBASE); + ret = -EIO; + goto out; + } + + printk(KERN_INFO PFX "Found a %s TCO device (Version=%d, TCOBASE=0x%04lx)\n", + iTCO_chipset_info[ent->driver_data].name, + iTCO_chipset_info[ent->driver_data].iTCO_version, + TCOBASE); + + /* Clear out the (probably old) status */ + outb(0, TCO1_STS); + outb(3, TCO2_STS); + + /* Make sure the watchdog is not running */ + iTCO_wdt_stop(); + + /* Check that the heartbeat value is within it's range ; if not reset to the default */ + if (iTCO_wdt_set_heartbeat(heartbeat)) { + iTCO_wdt_set_heartbeat(WATCHDOG_HEARTBEAT); + printk(KERN_INFO PFX "heartbeat value must be 2"); +MODULE_DESCRIPTION("Intel TCO WatchDog Timer Driver"); +MODULE_VERSION(DRV_VERSION); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); diff -puN /dev/null drivers/char/watchdog/smsc37b787_wdt.c --- /dev/null +++ a/drivers/char/watchdog/smsc37b787_wdt.c @@ -0,0 +1,627 @@ +/* + * SMsC 37B787 Watchdog Timer driver for Linux 2.6.x.x + * + * Based on acquirewdt.c by Alan Cox + * and some other existing drivers + * + * 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. + * + * The authors do NOT admit liability nor provide warranty for + * any of this software. This material is provided "AS-IS" in + * the hope that it may be useful for others. + * + * (C) Copyright 2003-2006 Sven Anders + * + * History: + * 2003 - Created version 1.0 for Linux 2.4.x. + * 2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE + * features. Released version 1.1 + * + * Theory of operation: + * + * A Watchdog Timer (WDT) is a hardware circuit that can + * reset the computer system in case of a software fault. + * You probably knew that already. + * + * Usually a userspace daemon will notify the kernel WDT driver + * via the /dev/watchdog special device file that userspace is + * still alive, at regular intervals. When such a notification + * occurs, the driver will usually tell the hardware watchdog + * that everything is in order, and that the watchdog should wait + * for yet another little while to reset the system. + * If userspace fails (RAM error, kernel bug, whatever), the + * notifications cease to occur, and the hardware watchdog will + * reset the system (causing a reboot) after the timeout occurs. + * + * Create device with: + * mknod /dev/watchdog c 10 130 + * + * For an example userspace keep-alive daemon, see: + * Documentation/watchdog/watchdog.txt + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +/* enable support for minutes as units? */ +/* (does not always work correctly, so disabled by default!) */ +#define SMSC_SUPPORT_MINUTES +#undef SMSC_SUPPORT_MINUTES + +#define MAX_TIMEOUT 255 + +#define UNIT_SECOND 0 +#define UNIT_MINUTE 1 + +#define MODNAME "smsc37b787_wdt: " +#define VERSION "1.1" + +#define IOPORT 0x3F0 +#define IOPORT_SIZE 2 +#define IODEV_NO 8 + +static int unit = UNIT_SECOND; /* timer's unit */ +static int timeout = 60; /* timeout value: default is 60 "units" */ +static unsigned long timer_enabled = 0; /* is the timer enabled? */ + +static char expect_close; /* is the close expected? */ + +static spinlock_t io_lock; /* to guard the watchdog from io races */ + +static int nowayout = WATCHDOG_NOWAYOUT; + +/* -- Low level function ----------------------------------------*/ + +/* unlock the IO chip */ + +static inline void open_io_config(void) +{ + outb(0x55, IOPORT); + mdelay(1); + outb(0x55, IOPORT); +} + +/* lock the IO chip */ +static inline void close_io_config(void) +{ + outb(0xAA, IOPORT); +} + +/* select the IO device */ +static inline void select_io_device(unsigned char devno) +{ + outb(0x07, IOPORT); + outb(devno, IOPORT+1); +} + +/* write to the control register */ +static inline void write_io_cr(unsigned char reg, unsigned char data) +{ + outb(reg, IOPORT); + outb(data, IOPORT+1); +} + +/* read from the control register */ +static inline char read_io_cr(unsigned char reg) +{ + outb(reg, IOPORT); + return inb(IOPORT+1); +} + +/* -- Medium level functions ------------------------------------*/ + +static inline void gpio_bit12(unsigned char reg) +{ + // -- General Purpose I/O Bit 1.2 -- + // Bit 0, In/Out: 0 = Output, 1 = Input + // Bit 1, Polarity: 0 = No Invert, 1 = Invert + // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable + // Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17, + // 11 = Either Edge Triggered Intr. 2 + // Bit 5/6 (Reserved) + // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain + write_io_cr(0xE2, reg); +} + +static inline void gpio_bit13(unsigned char reg) +{ + // -- General Purpose I/O Bit 1.3 -- + // Bit 0, In/Out: 0 = Output, 1 = Input + // Bit 1, Polarity: 0 = No Invert, 1 = Invert + // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable + // Bit 3, Function select: 0 = GPI/O, 1 = LED + // Bit 4-6 (Reserved) + // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain + write_io_cr(0xE3, reg); +} + +static inline void wdt_timer_units(unsigned char new_units) +{ + // -- Watchdog timer units -- + // Bit 0-6 (Reserved) + // Bit 7, WDT Time-out Value Units Select + // (0 = Minutes, 1 = Seconds) + write_io_cr(0xF1, new_units); +} + +static inline void wdt_timeout_value(unsigned char new_timeout) +{ + // -- Watchdog Timer Time-out Value -- + // Bit 0-7 Binary coded units (0=Disabled, 1..255) + write_io_cr(0xF2, new_timeout); +} + +static inline void wdt_timer_conf(unsigned char conf) +{ + // -- Watchdog timer configuration -- + // Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon Gameport I/O + // Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr. + // Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr. + // Bit 3 Reset the timer + // (Wrong in SMsC documentation? Given as: PowerLED Timout Enabled) + // Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled, + // 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15) + write_io_cr(0xF3, conf); +} + +static inline void wdt_timer_ctrl(unsigned char reg) +{ + // -- Watchdog timer control -- + // Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured + // Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz + // Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning) + // Bit 3 P20 Force Timeout enabled: + // 0 = P20 activity does not generate the WD timeout event + // 1 = P20 Allows rising edge of P20, from the keyboard + // controller, to force the WD timeout event. + // Bit 4 (Reserved) + // -- Soft power management -- + // Bit 5 Stop Counter: 1 = Stop software power down counter + // set via register 0xB8, (self-cleaning) + // (Upon read: 0 = Counter running, 1 = Counter stopped) + // Bit 6 Restart Counter: 1 = Restart software power down counter + // set via register 0xB8, (self-cleaning) + // Bit 7 SPOFF: 1 = Force software power down (self-cleaning) + + write_io_cr(0xF4, reg); +} + +/* -- Higher level functions ------------------------------------*/ + +/* initialize watchdog */ + +static void wb_smsc_wdt_initialize(void) +{ + unsigned char old; + + spin_lock(&io_lock); + open_io_config(); + select_io_device(IODEV_NO); + + // enable the watchdog + gpio_bit13(0x08); // Select pin 80 = LED not GPIO + gpio_bit12(0x0A); // Set pin 79 = WDT not GPIO/Output/Polarity=Invert + + // disable the timeout + wdt_timeout_value(0); + + // reset control register + wdt_timer_ctrl(0x00); + + // reset configuration register + wdt_timer_conf(0x00); + + // read old (timer units) register + old = read_io_cr(0xF1) & 0x7F; + if (unit == UNIT_SECOND) old |= 0x80; // set to seconds + + // set the watchdog timer units + wdt_timer_units(old); + + close_io_config(); + spin_unlock(&io_lock); +} + +/* shutdown the watchdog */ + +static void wb_smsc_wdt_shutdown(void) +{ + spin_lock(&io_lock); + open_io_config(); + select_io_device(IODEV_NO); + + // disable the watchdog + gpio_bit13(0x09); + gpio_bit12(0x09); + + // reset watchdog config register + wdt_timer_conf(0x00); + + // reset watchdog control register + wdt_timer_ctrl(0x00); + + // disable timeout + wdt_timeout_value(0x00); + + close_io_config(); + spin_unlock(&io_lock); +} + +/* set timeout => enable watchdog */ + +static void wb_smsc_wdt_set_timeout(unsigned char new_timeout) +{ + spin_lock(&io_lock); + open_io_config(); + select_io_device(IODEV_NO); + + // set Power LED to blink, if we enable the timeout + wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02); + + // set timeout value + wdt_timeout_value(new_timeout); + + close_io_config(); + spin_unlock(&io_lock); +} + +/* get timeout */ + +static unsigned char wb_smsc_wdt_get_timeout(void) +{ + unsigned char set_timeout; + + spin_lock(&io_lock); + open_io_config(); + select_io_device(IODEV_NO); + set_timeout = read_io_cr(0xF2); + close_io_config(); + spin_unlock(&io_lock); + + return set_timeout; +} + +/* disable watchdog */ + +static void wb_smsc_wdt_disable(void) +{ + // set the timeout to 0 to disable the watchdog + wb_smsc_wdt_set_timeout(0); +} + +/* enable watchdog by setting the current timeout */ + +static void wb_smsc_wdt_enable(void) +{ + // set the current timeout... + wb_smsc_wdt_set_timeout(timeout); +} + +/* reset the timer */ + +static void wb_smsc_wdt_reset_timer(void) +{ + spin_lock(&io_lock); + open_io_config(); + select_io_device(IODEV_NO); + + // reset the timer + wdt_timeout_value(timeout); + wdt_timer_conf(0x08); + + close_io_config(); + spin_unlock(&io_lock); +} + +/* return, if the watchdog is enabled (timeout is set...) */ + +static int wb_smsc_wdt_status(void) +{ + return (wb_smsc_wdt_get_timeout() == 0) ? 0 : WDIOF_KEEPALIVEPING; +} + + +/* -- File operations -------------------------------------------*/ + +/* open => enable watchdog and set initial timeout */ + +static int wb_smsc_wdt_open(struct inode *inode, struct file *file) +{ + /* /dev/watchdog can only be opened once */ + + if (test_and_set_bit(0, &timer_enabled)) + return -EBUSY; + + if (nowayout) + __module_get(THIS_MODULE); + + /* Reload and activate timer */ + wb_smsc_wdt_enable(); + + printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)"); + + return nonseekable_open(inode, file); +} + +/* close => shut off the timer */ + +static int wb_smsc_wdt_release(struct inode *inode, struct file *file) +{ + /* Shut off the timer. */ + + if (expect_close == 42) { + wb_smsc_wdt_disable(); + printk(KERN_INFO MODNAME "Watchdog disabled, sleeping again...\n"); + } else { + printk(KERN_CRIT MODNAME "Unexpected close, not stopping watchdog!\n"); + wb_smsc_wdt_reset_timer(); + } + + clear_bit(0, &timer_enabled); + expect_close = 0; + return 0; +} + +/* write => update the timer to keep the machine alive */ + +static ssize_t wb_smsc_wdt_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; + + /* reset expect flag */ + expect_close = 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_close = 42; + } + } + + /* someone wrote to us, we should reload the timer */ + wb_smsc_wdt_reset_timer(); + } + return len; +} + +/* ioctl => control interface */ + +static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + int new_timeout; + + union { + struct watchdog_info __user *ident; + int __user *i; + } uarg; + + static struct watchdog_info ident = { + .options = WDIOF_KEEPALIVEPING | + WDIOF_SETTIMEOUT | + WDIOF_MAGICCLOSE, + .firmware_version = 0, + .identity = "SMsC 37B787 Watchdog" + }; + + uarg.i = (int __user *)arg; + + switch (cmd) { + default: + return -ENOTTY; + + case WDIOC_GETSUPPORT: + return copy_to_user(uarg.ident, &ident, + sizeof(ident)) ? -EFAULT : 0; + + case WDIOC_GETSTATUS: + return put_user(wb_smsc_wdt_status(), uarg.i); + + case WDIOC_GETBOOTSTATUS: + return put_user(0, uarg.i); + + case WDIOC_KEEPALIVE: + wb_smsc_wdt_reset_timer(); + return 0; + + case WDIOC_SETTIMEOUT: + if (get_user(new_timeout, uarg.i)) + return -EFAULT; + + // the API states this is given in secs + if (unit == UNIT_MINUTE) + new_timeout /= 60; + + if (new_timeout < 0 || new_timeout > MAX_TIMEOUT) + return -EINVAL; + + timeout = new_timeout; + wb_smsc_wdt_set_timeout(timeout); + + // fall through and return the new timeout... + + case WDIOC_GETTIMEOUT: + + new_timeout = timeout; + + if (unit == UNIT_MINUTE) + new_timeout *= 60; + + return put_user(new_timeout, uarg.i); + + case WDIOC_SETOPTIONS: + { + int options, retval = -EINVAL; + + if (get_user(options, uarg.i)) + return -EFAULT; + + if (options & WDIOS_DISABLECARD) { + wb_smsc_wdt_disable(); + retval = 0; + } + + if (options & WDIOS_ENABLECARD) { + wb_smsc_wdt_enable(); + retval = 0; + } + + return retval; + } + } +} + +/* -- Notifier funtions -----------------------------------------*/ + +static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused) +{ + if (code == SYS_DOWN || code == SYS_HALT) + { + // set timeout to 0, to avoid possible race-condition + timeout = 0; + wb_smsc_wdt_disable(); + } + return NOTIFY_DONE; +} + +/* -- Module's structures ---------------------------------------*/ + +static struct file_operations wb_smsc_wdt_fops = +{ + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = wb_smsc_wdt_write, + .ioctl = wb_smsc_wdt_ioctl, + .open = wb_smsc_wdt_open, + .release = wb_smsc_wdt_release, +}; + +static struct notifier_block wb_smsc_wdt_notifier = +{ + .notifier_call = wb_smsc_wdt_notify_sys, +}; + +static struct miscdevice wb_smsc_wdt_miscdev = +{ + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &wb_smsc_wdt_fops, +}; + +/* -- Module init functions -------------------------------------*/ + +/* module's "constructor" */ + +static int __init wb_smsc_wdt_init(void) +{ + int ret; + + spin_lock_init(&io_lock); + + printk("SMsC 37B787 watchdog component driver " VERSION " initialising...\n"); + + if (!request_region(IOPORT, IOPORT_SIZE, "SMsC 37B787 watchdog")) { + printk(KERN_ERR MODNAME "Unable to register IO port %#x\n", IOPORT); + ret = -EBUSY; + goto out_pnp; + } + + // set new maximum, if it's too big + if (timeout > MAX_TIMEOUT) + timeout = MAX_TIMEOUT; + + // init the watchdog timer + wb_smsc_wdt_initialize(); + + ret = register_reboot_notifier(&wb_smsc_wdt_notifier); + if (ret) { + printk(KERN_ERR MODNAME "Unable to register reboot notifier err = %d\n", ret); + goto out_io; + } + + ret = misc_register(&wb_smsc_wdt_miscdev); + if (ret) { + printk(KERN_ERR MODNAME "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR); + goto out_rbt; + } + + // output info + printk(KERN_INFO MODNAME "Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)"); + printk(KERN_INFO MODNAME "Watchdog initialized and sleeping (nowayout=%d)...\n", nowayout); + + // ret = 0 + +out_clean: + return ret; + +out_rbt: + unregister_reboot_notifier(&wb_smsc_wdt_notifier); + +out_io: + release_region(IOPORT, IOPORT_SIZE); + +out_pnp: + goto out_clean; +} + +/* module's "destructor" */ + +static void __exit wb_smsc_wdt_exit(void) +{ + /* Stop the timer before we leave */ + if (!nowayout) + { + wb_smsc_wdt_shutdown(); + printk(KERN_INFO MODNAME "Watchdog disabled.\n"); + } + + misc_deregister(&wb_smsc_wdt_miscdev); + unregister_reboot_notifier(&wb_smsc_wdt_notifier); + release_region(IOPORT, IOPORT_SIZE); + + printk("SMsC 37B787 watchdog component driver removed.\n"); +} + +module_init(wb_smsc_wdt_init); +module_exit(wb_smsc_wdt_exit); + +MODULE_AUTHOR("Sven Anders "); +MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version " VERSION ")"); +MODULE_LICENSE("GPL"); + +MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); + +#ifdef SMSC_SUPPORT_MINUTES +module_param(unit, int, 0); +MODULE_PARM_DESC(unit, "set unit to use, 0=seconds or 1=minutes, default is 0"); +#endif + +module_param(timeout, int, 0); +MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60"); + +module_param(nowayout, int, 0); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff -puN drivers/char/watchdog/w83627hf_wdt.c~git-watchdog drivers/char/watchdog/w83627hf_wdt.c --- a/drivers/char/watchdog/w83627hf_wdt.c~git-watchdog +++ a/drivers/char/watchdog/w83627hf_wdt.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include @@ -44,6 +45,7 @@ static unsigned long wdt_is_open; static char expect_close; +static spinlock_t io_lock; /* You must set this - there is no sane way to probe for this board. */ static int wdt_io = 0x2E; @@ -110,12 +112,16 @@ w83627hf_init(void) static void wdt_ctrl(int timeout) { + spin_lock(&io_lock); + w83627hf_select_wd_register(); outb_p(0xF6, WDT_EFER); /* Select CRF6 */ outb_p(timeout, WDT_EFDR); /* Write Timeout counter to CRF6 */ w83627hf_unselect_wd_register(); + + spin_unlock(&io_lock); } static int @@ -303,6 +309,8 @@ wdt_init(void) { int ret; + spin_lock_init(&io_lock); + printk(KERN_INFO "WDT driver for the Winbond(TM) W83627HF Super I/O chip initialising.\n"); if (wdt_set_heartbeat(timeout)) { diff -puN /dev/null drivers/char/watchdog/w83697hf_wdt.c --- /dev/null +++ a/drivers/char/watchdog/w83697hf_wdt.c @@ -0,0 +1,448 @@ +/* + * w83697hf/hg WDT driver + * + * (c) Copyright 2006 Samuel Tardieu + * (c) Copyright 2006 Marcus Junker + * + * Based on w83627hf_wdt.c which is based on advantechwdt.c + * which is based on wdt.c. + * Original copyright messages: + * + * (c) Copyright 2003 Pádraig Brady + * + * (c) Copyright 2000-2001 Marek Michalkiewicz + * + * (c) Copyright 1996 Alan Cox , All Rights Reserved. + * http://www.redhat.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 Marcus Junker nor ANDURAS AG admit liability nor provide + * warranty for any of this software. This material is provided + * "AS-IS" and at no charge. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define WATCHDOG_NAME "w83697hf/hg WDT" +#define PFX WATCHDOG_NAME ": " +#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */ + +static unsigned long wdt_is_open; +static char expect_close; +static spinlock_t io_lock; + +/* You must set this - there is no sane way to probe for this board. */ +static int wdt_io = 0x2e; +module_param(wdt_io, int, 0); +MODULE_PARM_DESC(wdt_io, "w83697hf/hg WDT io port (default 0x2e, 0 = autodetect)"); + +static int timeout = WATCHDOG_TIMEOUT; /* in seconds */ +module_param(timeout, int, 0); +MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) "."); + +static int nowayout = WATCHDOG_NOWAYOUT; +module_param(nowayout, int, 0); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); + +/* + * Kernel methods. + */ + +#define W83697HF_EFER (wdt_io+0) /* Extended Function Enable Register */ +#define W83697HF_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */ +#define W83697HF_EFDR (wdt_io+1) /* Extended Function Data Register */ + +static inline void +w83697hf_unlock(void) +{ + outb_p(0x87, W83697HF_EFER); /* Enter extended function mode */ + outb_p(0x87, W83697HF_EFER); /* Again according to manual */ +} + +static inline void +w83697hf_lock(void) +{ + outb_p(0xAA, W83697HF_EFER); /* Leave extended function mode */ +} + +/* + * The three functions w83697hf_get_reg(), w83697hf_set_reg() and + * w83697hf_write_timeout() must be called with the device unlocked. + */ + +static unsigned char +w83697hf_get_reg(unsigned char reg) +{ + outb_p(reg, W83697HF_EFIR); + return inb_p(W83697HF_EFDR); +} + +static void +w83697hf_set_reg(unsigned char reg, unsigned char data) +{ + outb_p(reg, W83697HF_EFIR); + outb_p(data, W83697HF_EFDR); +} + +static void +w83697hf_write_timeout(int timeout) +{ + w83697hf_set_reg(0xF4, timeout); /* Write Timeout counter to CRF4 */ +} + +static void +w83697hf_select_wdt(void) +{ + w83697hf_unlock(); + w83697hf_set_reg(0x07, 0x08); /* Switch to logic device 8 (GPIO2) */ +} + +static inline void +w83697hf_deselect_wdt(void) +{ + w83697hf_lock(); +} + +static void +w83697hf_init(void) +{ + unsigned char bbuf; + + w83697hf_select_wdt(); + + bbuf = w83697hf_get_reg(0x29); + bbuf &= ~0x60; + bbuf |= 0x20; + w83697hf_set_reg(0x29, bbuf); /* Set pin 119 to WDTO# mode (= CR29, WDT0) */ + + bbuf = w83697hf_get_reg(0xF3); + bbuf &= ~0x04; + w83697hf_set_reg(0xF3, bbuf); /* Count mode is seconds */ + + w83697hf_deselect_wdt(); +} + +static int +wdt_ping(void) +{ + spin_lock(&io_lock); + w83697hf_select_wdt(); + + w83697hf_write_timeout(timeout); + + w83697hf_deselect_wdt(); + spin_unlock(&io_lock); + return 0; +} + +static int +wdt_enable(void) +{ + spin_lock(&io_lock); + w83697hf_select_wdt(); + + w83697hf_write_timeout(timeout); + w83697hf_set_reg(0x30, 1); /* Enable timer */ + + w83697hf_deselect_wdt(); + spin_unlock(&io_lock); + return 0; +} + +static int +wdt_disable(void) +{ + spin_lock(&io_lock); + w83697hf_select_wdt(); + + w83697hf_set_reg(0x30, 0); /* Disable timer */ + w83697hf_write_timeout(0); + + w83697hf_deselect_wdt(); + spin_unlock(&io_lock); + return 0; +} + +static int +wdt_set_heartbeat(int t) +{ + if ((t < 1) || (t > 255)) + return -EINVAL; + + timeout = t; + return 0; +} + +static ssize_t +wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) +{ + if (count) { + if (!nowayout) { + size_t i; + + expect_close = 0; + + for (i = 0; i != count; i++) { + char c; + if (get_user(c, buf+i)) + return -EFAULT; + if (c == 'V') + expect_close = 42; + } + } + wdt_ping(); + } + return count; +} + +static int +wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, + unsigned long arg) +{ + void __user *argp = (void __user *)arg; + int __user *p = argp; + int new_timeout; + static struct watchdog_info ident = { + .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE, + .firmware_version = 1, + .identity = "W83697HF WDT", + }; + + switch (cmd) { + case WDIOC_GETSUPPORT: + if (copy_to_user(argp, &ident, sizeof(ident))) + return -EFAULT; + break; + + case WDIOC_GETSTATUS: + case WDIOC_GETBOOTSTATUS: + return put_user(0, p); + + case WDIOC_KEEPALIVE: + wdt_ping(); + break; + + case WDIOC_SETTIMEOUT: + if (get_user(new_timeout, p)) + return -EFAULT; + if (wdt_set_heartbeat(new_timeout)) + return -EINVAL; + wdt_ping(); + /* Fall */ + + case WDIOC_GETTIMEOUT: + return put_user(timeout, p); + + case WDIOC_SETOPTIONS: + { + int options, retval = -EINVAL; + + if (get_user(options, p)) + return -EFAULT; + + if (options & WDIOS_DISABLECARD) { + wdt_disable(); + retval = 0; + } + + if (options & WDIOS_ENABLECARD) { + wdt_enable(); + retval = 0; + } + + return retval; + } + + default: + return -ENOTTY; + } + return 0; +} + +static int +wdt_open(struct inode *inode, struct file *file) +{ + if (test_and_set_bit(0, &wdt_is_open)) + return -EBUSY; + /* + * Activate + */ + + wdt_enable(); + return nonseekable_open(inode, file); +} + +static int +wdt_close(struct inode *inode, struct file *file) +{ + if (expect_close == 42) { + wdt_disable(); + } else { + printk (KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); + wdt_ping(); + } + expect_close = 0; + clear_bit(0, &wdt_is_open); + return 0; +} + +/* + * Notifier for system down + */ + +static int +wdt_notify_sys(struct notifier_block *this, unsigned long code, + void *unused) +{ + if (code == SYS_DOWN || code == SYS_HALT) { + /* Turn the WDT off */ + wdt_disable(); + } + return NOTIFY_DONE; +} + +/* + * Kernel Interfaces + */ + +static struct file_operations wdt_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = wdt_write, + .ioctl = wdt_ioctl, + .open = wdt_open, + .release = wdt_close, +}; + +static struct miscdevice wdt_miscdev = { + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &wdt_fops, +}; + +/* + * The WDT needs to learn about soft shutdowns in order to + * turn the timebomb registers off. + */ + +static struct notifier_block wdt_notifier = { + .notifier_call = wdt_notify_sys, +}; + +static int +w83697hf_check_wdt(void) +{ + if (!request_region(wdt_io, 2, WATCHDOG_NAME)) { + printk (KERN_ERR PFX "I/O address 0x%x already in use\n", wdt_io); + return -EIO; + } + + printk (KERN_DEBUG PFX "Looking for watchdog at address 0x%x\n", wdt_io); + w83697hf_unlock(); + if (w83697hf_get_reg(0x20) == 0x60) { + printk (KERN_INFO PFX "watchdog found at address 0x%x\n", wdt_io); + w83697hf_lock(); + return 0; + } + w83697hf_lock(); /* Reprotect in case it was a compatible device */ + + printk (KERN_INFO PFX "watchdog not found at address 0x%x\n", wdt_io); + release_region(wdt_io, 2); + return -EIO; +} + +static int __init +wdt_init(void) +{ + int ret, autodetect; + + spin_lock_init(&io_lock); + + printk (KERN_INFO PFX "WDT driver for W83697HF/HG initializing\n"); + + autodetect = wdt_io == 0; + if (autodetect) + wdt_io = 0x2e; + + if (!w83697hf_check_wdt()) + goto found; + + if (autodetect) { + wdt_io = 0x4e; + if (!w83697hf_check_wdt()) + goto found; + } + + printk (KERN_ERR PFX "No W83697HF/HG could be found\n"); + ret = -EIO; + goto out; + +found: + w83697hf_init(); + wdt_disable(); /* Disable watchdog until first use */ + + if (wdt_set_heartbeat(timeout)) { + wdt_set_heartbeat(WATCHDOG_TIMEOUT); + printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n", + WATCHDOG_TIMEOUT); + } + + ret = register_reboot_notifier(&wdt_notifier); + if (ret != 0) { + printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", + ret); + goto unreg_regions; + } + + ret = misc_register(&wdt_miscdev); + if (ret != 0) { + printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + WATCHDOG_MINOR, ret); + goto unreg_reboot; + } + + printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n", + timeout, nowayout); + +out: + return ret; +unreg_reboot: + unregister_reboot_notifier(&wdt_notifier); +unreg_regions: + release_region(wdt_io, 2); + goto out; +} + +static void __exit +wdt_exit(void) +{ + misc_deregister(&wdt_miscdev); + unregister_reboot_notifier(&wdt_notifier); + release_region(wdt_io, 2); +} + +module_init(wdt_init); +module_exit(wdt_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Marcus Junker , Samuel Tardieu "); +MODULE_DESCRIPTION("w83697hf/hg WDT driver"); +MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); _