Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog: (33 commits) [WATCHDOG] remove experimental on iTCO_wdt.c [WATCHDOG] Atmel AT91RM9200 rename. [WATCHDOG] includes for sample watchdog program. [WATCHDOG] watchdog/iTCO_wdt: fix bug related to gcc uninit warning [WATCHDOG] add ich8 support to iTCO_wdt.c (patch 2) [WATCHDOG] add ich8 support to iTCO_wdt.c [WATCHDOG] ioremap balanced with iounmap for drivers/char/watchdog/s3c2410_wdt.c [WATCHDOG] w83697hf/hg WDT driver - Kconfig patch [WATCHDOG] w83697hf/hg WDT driver - autodetect patch [WATCHDOG] w83697hf/hg WDT driver - patch 16 [WATCHDOG] w83697hf/hg WDT driver - patch 15 [WATCHDOG] w83697hf/hg WDT driver - patch 14 [WATCHDOG] w83697hf/hg WDT driver - patch 13 [WATCHDOG] w83697hf/hg WDT driver - patch 12 [WATCHDOG] w83697hf/hg WDT driver - patch 11 [WATCHDOG] w83697hf/hg WDT driver - patch 10 [WATCHDOG] w83697hf/hg WDT driver - patch 9 [WATCHDOG] w83697hf/hg WDT driver - patch 8 [WATCHDOG] w83697hf/hg WDT driver - patch 7 [WATCHDOG] w83697hf/hg WDT driver - patch 6 ...
This commit is contained in:
commit
6d03a68e6d
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@ -1,4 +1,6 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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int main(int argc, const char *argv[]) {
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|
|
|
@ -577,7 +577,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
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# Watchdog Device Drivers
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#
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# CONFIG_SOFT_WATCHDOG is not set
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CONFIG_AT91_WATCHDOG=y
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CONFIG_AT91RM9200_WATCHDOG=y
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#
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# USB-based Watchdog Cards
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|
|
|
@ -558,7 +558,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
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# Watchdog Device Drivers
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#
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# CONFIG_SOFT_WATCHDOG is not set
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CONFIG_AT91_WATCHDOG=y
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CONFIG_AT91RM9200_WATCHDOG=y
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#
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# USB-based Watchdog Cards
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|
|
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@ -615,7 +615,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
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# Watchdog Device Drivers
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#
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# CONFIG_SOFT_WATCHDOG is not set
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CONFIG_AT91_WATCHDOG=y
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CONFIG_AT91RM9200_WATCHDOG=y
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#
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# USB-based Watchdog Cards
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|
|
|
@ -615,7 +615,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
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# Watchdog Device Drivers
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#
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# CONFIG_SOFT_WATCHDOG is not set
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CONFIG_AT91_WATCHDOG=y
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CONFIG_AT91RM9200_WATCHDOG=y
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#
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# USB-based Watchdog Cards
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|
|
|
@ -560,7 +560,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
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# Watchdog Device Drivers
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#
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# CONFIG_SOFT_WATCHDOG is not set
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CONFIG_AT91_WATCHDOG=y
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CONFIG_AT91RM9200_WATCHDOG=y
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# CONFIG_NVRAM is not set
|
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# CONFIG_DTLK is not set
|
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# CONFIG_R3964 is not set
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|
|
|
@ -607,7 +607,7 @@ CONFIG_WATCHDOG_NOWAYOUT=y
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# Watchdog Device Drivers
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#
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# CONFIG_SOFT_WATCHDOG is not set
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CONFIG_AT91_WATCHDOG=y
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CONFIG_AT91RM9200_WATCHDOG=y
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#
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# USB-based Watchdog Cards
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|
|
|
@ -13,7 +13,7 @@ config WATCHDOG
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subsequently opening the file and then failing to write to it for
|
||||
longer than 1 minute will result in rebooting the machine. This
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could be useful for a networked machine that needs to come back
|
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online as fast as possible after a lock-up. There's both a watchdog
|
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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
|
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are more robust and can also keep track of the temperature inside
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|
@ -60,7 +60,7 @@ config SOFT_WATCHDOG
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|||
|
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# ARM Architecture
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config AT91_WATCHDOG
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config AT91RM9200_WATCHDOG
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tristate "AT91RM9200 watchdog"
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depends on WATCHDOG && ARCH_AT91RM9200
|
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help
|
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|
@ -71,7 +71,7 @@ config 21285_WATCHDOG
|
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tristate "DC21285 watchdog"
|
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depends on WATCHDOG && FOOTBRIDGE
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help
|
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The Intel Footbridge chip contains a builtin watchdog circuit. Say Y
|
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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
|
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driver as a module, which will be called wdt285.
|
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|
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|
@ -269,11 +269,11 @@ config IB700_WDT
|
|||
Most people will say N.
|
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|
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config IBMASR
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tristate "IBM Automatic Server Restart"
|
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depends on WATCHDOG && X86
|
||||
help
|
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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.
|
||||
|
@ -316,13 +316,16 @@ config I8XX_TCO
|
|||
To compile this driver as a module, choose M here: the
|
||||
module will be called i8xx_tco.
|
||||
|
||||
Note: This driver will be removed in the near future. Please
|
||||
use the Intel TCO Timer/Watchdog driver.
|
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|
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config ITCO_WDT
|
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tristate "Intel TCO Timer/Watchdog (EXPERIMENTAL)"
|
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depends on WATCHDOG && (X86 || IA64) && PCI && EXPERIMENTAL
|
||||
tristate "Intel TCO Timer/Watchdog"
|
||||
depends on WATCHDOG && (X86 || IA64) && PCI
|
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---help---
|
||||
Hardware driver for the intel TCO timer based watchdog devices.
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These drivers are included in the Intel 82801 I/O Controller
|
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Hub family 'from ICH0 up to ICH7) and in the Intel 6300ESB
|
||||
Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB
|
||||
controller hub.
|
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|
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The TCO (Total Cost of Ownership) timer is a watchdog timer
|
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|
@ -395,6 +398,26 @@ config CPU5_WDT
|
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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
|
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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.
|
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|
||||
To compile this driver as a module, choose M here: the
|
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module will be called smsc37b787_wdt.
|
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|
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Most people will say N.
|
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|
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config W83627HF_WDT
|
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tristate "W83627HF Watchdog Timer"
|
||||
depends on WATCHDOG && X86
|
||||
|
@ -410,6 +433,21 @@ config W83627HF_WDT
|
|||
|
||||
Most people will say N.
|
||||
|
||||
config W83697HF_WDT
|
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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.
|
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|
||||
Most people will say N.
|
||||
|
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config W83877F_WDT
|
||||
tristate "W83877F (EMACS) Watchdog Timer"
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depends on WATCHDOG && X86
|
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|
@ -443,7 +481,7 @@ 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.
|
||||
|
@ -472,7 +510,6 @@ config SBC_EPX_C3_WATCHDOG
|
|||
To compile this driver as a module, choose M here: the
|
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module will be called sbc_epx_c3.
|
||||
|
||||
|
||||
# PowerPC Architecture
|
||||
|
||||
config 8xx_WDT
|
||||
|
@ -502,7 +539,7 @@ 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
|
||||
|
@ -556,7 +593,7 @@ config SH_WDT_MMAP
|
|||
help
|
||||
If you say Y here, user applications will be able to mmap the
|
||||
WDT/CPG registers.
|
||||
#
|
||||
|
||||
# SPARC64 Architecture
|
||||
|
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config WATCHDOG_CP1XXX
|
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|
|
|
@ -23,7 +23,7 @@ obj-$(CONFIG_WDTPCI) += wdt_pci.o
|
|||
obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
|
||||
|
||||
# ARM Architecture
|
||||
obj-$(CONFIG_AT91_WATCHDOG) += at91_wdt.o
|
||||
obj-$(CONFIG_AT91RM9200_WATCHDOG) += at91rm9200_wdt.o
|
||||
obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
|
||||
obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
|
||||
obj-$(CONFIG_977_WATCHDOG) += wdt977.o
|
||||
|
@ -53,7 +53,9 @@ obj-$(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
|
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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
|
||||
|
|
|
@ -35,6 +35,10 @@
|
|||
* 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,
|
||||
* 82801HB (ICH8) : document number 313056-002, 313057-004,
|
||||
* 82801HR (ICH8R) : document number 313056-002, 313057-004,
|
||||
* 82801HH (ICH8DH) : document number 313056-002, 313057-004,
|
||||
* 82801HO (ICH8DO) : document number 313056-002, 313057-004,
|
||||
* 6300ESB (6300ESB) : document number 300641-003
|
||||
*/
|
||||
|
||||
|
@ -45,7 +49,7 @@
|
|||
/* Module and version information */
|
||||
#define DRV_NAME "iTCO_wdt"
|
||||
#define DRV_VERSION "1.00"
|
||||
#define DRV_RELDATE "30-Jul-2006"
|
||||
#define DRV_RELDATE "08-Oct-2006"
|
||||
#define PFX DRV_NAME ": "
|
||||
|
||||
/* Includes */
|
||||
|
@ -85,6 +89,9 @@ enum iTCO_chipsets {
|
|||
TCO_ICH7, /* ICH7 & ICH7R */
|
||||
TCO_ICH7M, /* ICH7-M */
|
||||
TCO_ICH7MDH, /* ICH7-M DH */
|
||||
TCO_ICH8, /* ICH8 & ICH8R */
|
||||
TCO_ICH8DH, /* ICH8DH */
|
||||
TCO_ICH8DO, /* ICH8DO */
|
||||
};
|
||||
|
||||
static struct {
|
||||
|
@ -108,6 +115,9 @@ static struct {
|
|||
{"ICH7 or ICH7R", 2},
|
||||
{"ICH7-M", 2},
|
||||
{"ICH7-M DH", 2},
|
||||
{"ICH8 or ICH8R", 2},
|
||||
{"ICH8DH", 2},
|
||||
{"ICH8DO", 2},
|
||||
{NULL,0}
|
||||
};
|
||||
|
||||
|
@ -135,6 +145,9 @@ static struct pci_device_id iTCO_wdt_pci_tbl[] = {
|
|||
{ 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 },
|
||||
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8 },
|
||||
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8DH },
|
||||
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8DO },
|
||||
{ 0, }, /* End of list */
|
||||
};
|
||||
MODULE_DEVICE_TABLE (pci, iTCO_wdt_pci_tbl);
|
||||
|
@ -355,7 +368,8 @@ static int iTCO_wdt_get_timeleft (int *time_left)
|
|||
spin_unlock(&iTCO_wdt_private.io_lock);
|
||||
|
||||
*time_left = (val8 * 6) / 10;
|
||||
}
|
||||
} else
|
||||
return -EINVAL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
@ -426,7 +440,6 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
|
|||
{
|
||||
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 = {
|
||||
|
@ -486,6 +499,8 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
|
|||
|
||||
case WDIOC_GETTIMELEFT:
|
||||
{
|
||||
int time_left;
|
||||
|
||||
if (iTCO_wdt_get_timeleft(&time_left))
|
||||
return -EINVAL;
|
||||
|
||||
|
|
|
@ -380,18 +380,21 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
|
|||
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
||||
if (res == NULL) {
|
||||
printk(KERN_INFO PFX "failed to get irq resource\n");
|
||||
iounmap(wdt_base);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
ret = request_irq(res->start, s3c2410wdt_irq, 0, pdev->name, pdev);
|
||||
if (ret != 0) {
|
||||
printk(KERN_INFO PFX "failed to install irq (%d)\n", ret);
|
||||
iounmap(wdt_base);
|
||||
return ret;
|
||||
}
|
||||
|
||||
wdt_clock = clk_get(&pdev->dev, "watchdog");
|
||||
if (wdt_clock == NULL) {
|
||||
printk(KERN_INFO PFX "failed to find watchdog clock source\n");
|
||||
iounmap(wdt_base);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
|
@ -415,6 +418,7 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
|
|||
if (ret) {
|
||||
printk (KERN_ERR PFX "cannot register miscdev on minor=%d (%d)\n",
|
||||
WATCHDOG_MINOR, ret);
|
||||
iounmap(wdt_base);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
@ -451,6 +455,7 @@ static int s3c2410wdt_remove(struct platform_device *dev)
|
|||
wdt_clock = NULL;
|
||||
}
|
||||
|
||||
iounmap(wdt_base);
|
||||
misc_deregister(&s3c2410wdt_miscdev);
|
||||
return 0;
|
||||
}
|
||||
|
|
627
drivers/char/watchdog/smsc37b787_wdt.c
Normal file
627
drivers/char/watchdog/smsc37b787_wdt.c
Normal file
|
@ -0,0 +1,627 @@
|
|||
/*
|
||||
* SMsC 37B787 Watchdog Timer driver for Linux 2.6.x.x
|
||||
*
|
||||
* Based on acquirewdt.c by Alan Cox <alan@redhat.com>
|
||||
* 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 <anders@anduras.de>
|
||||
*
|
||||
* 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 <linux/module.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/watchdog.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/notifier.h>
|
||||
#include <linux/reboot.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/spinlock.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <asm/system.h>
|
||||
|
||||
/* 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 <anders@anduras.de>");
|
||||
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)");
|
|
@ -33,6 +33,7 @@
|
|||
#include <linux/notifier.h>
|
||||
#include <linux/reboot.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/spinlock.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/uaccess.h>
|
||||
|
@ -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)) {
|
||||
|
|
450
drivers/char/watchdog/w83697hf_wdt.c
Normal file
450
drivers/char/watchdog/w83697hf_wdt.c
Normal file
|
@ -0,0 +1,450 @@
|
|||
/*
|
||||
* w83697hf/hg WDT driver
|
||||
*
|
||||
* (c) Copyright 2006 Samuel Tardieu <sam@rfc1149.net>
|
||||
* (c) Copyright 2006 Marcus Junker <junker@anduras.de>
|
||||
*
|
||||
* 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 <P@draigBrady.com>
|
||||
*
|
||||
* (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
|
||||
*
|
||||
* (c) Copyright 1996 Alan Cox <alan@redhat.com>, 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 <linux/module.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/watchdog.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/notifier.h>
|
||||
#include <linux/reboot.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/spinlock.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <asm/system.h>
|
||||
|
||||
#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 w83697hf_ioports[] = { 0x2e, 0x4e, 0x00 };
|
||||
|
||||
static int __init
|
||||
wdt_init(void)
|
||||
{
|
||||
int ret, i, found = 0;
|
||||
|
||||
spin_lock_init(&io_lock);
|
||||
|
||||
printk (KERN_INFO PFX "WDT driver for W83697HF/HG initializing\n");
|
||||
|
||||
if (wdt_io == 0) {
|
||||
/* we will autodetect the W83697HF/HG watchdog */
|
||||
for (i = 0; ((!found) && (w83697hf_ioports[i] != 0)); i++) {
|
||||
wdt_io = w83697hf_ioports[i];
|
||||
if (!w83697hf_check_wdt())
|
||||
found++;
|
||||
}
|
||||
} else {
|
||||
if (!w83697hf_check_wdt())
|
||||
found++;
|
||||
}
|
||||
|
||||
if (!found) {
|
||||
printk (KERN_ERR PFX "No W83697HF/HG could be found\n");
|
||||
ret = -EIO;
|
||||
goto out;
|
||||
}
|
||||
|
||||
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 <junker@anduras.de>, Samuel Tardieu <sam@rfc1149.net>");
|
||||
MODULE_DESCRIPTION("w83697hf/hg WDT driver");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
Loading…
Reference in a new issue