Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
* master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog: [WATCHDOG] MIPS RM9000 on-chip watchdog device - patch 4 [WATCHDOG] MIPS RM9000 on-chip watchdog device - patch 3 [WATCHDOG] MIPS RM9000 on-chip watchdog device - patch 2 [WATCHDOG] MIPS RM9000 on-chip watchdog device - patch 1 [WATCHDOG] MIPS RM9000 on-chip watchdog device [WATCHDOG] Add iTCO vendor specific support [WATCHDOG] sc1200wdt.c pnp unregister fix. [WATCHDOG] config.h removal [WATCHDOG] NS pc87413-wdt Watchdog driver - fixes [WATCHDOG] NS pc87413-wdt Watchdog driver v1.1 [WATCHDOG] NS pc87413-wdt Watchdog driver
This commit is contained in:
Linus Torvalds
commit
b6ef977b60
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@ -340,6 +340,14 @@ config ITCO_WDT
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To compile this driver as a module, choose M here: the
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To compile this driver as a module, choose M here: the
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module will be called iTCO_wdt.
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module will be called iTCO_wdt.
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config ITCO_VENDOR_SUPPORT
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bool "Intel TCO Timer/Watchdog Specific Vendor Support"
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depends on ITCO_WDT
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---help---
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Add vendor specific support to the intel TCO timer based watchdog
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devices. At this moment we only have additional support for some
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SuperMicro Inc. motherboards.
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config SC1200_WDT
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config SC1200_WDT
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tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
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tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
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depends on WATCHDOG && X86
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depends on WATCHDOG && X86
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@ -363,6 +371,20 @@ config SCx200_WDT
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If compiled as a module, it will be called scx200_wdt.
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If compiled as a module, it will be called scx200_wdt.
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config PC87413_WDT
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tristate "NS PC87413 watchdog"
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depends on WATCHDOG && X86
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---help---
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This is the driver for the hardware watchdog on the PC87413 chipset
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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
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amount of time.
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To compile this driver as a module, choose M here: the
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module will be called pc87413_wdt.
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Most people will say N.
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config 60XX_WDT
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config 60XX_WDT
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tristate "SBC-60XX Watchdog Timer"
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tristate "SBC-60XX Watchdog Timer"
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depends on WATCHDOG && X86
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depends on WATCHDOG && X86
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@ -553,6 +575,16 @@ config INDYDOG
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timer expired and no process has written to /dev/watchdog during
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timer expired and no process has written to /dev/watchdog during
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that time.
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that time.
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config WDT_RM9K_GPI
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tristate "RM9000/GPI hardware watchdog"
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depends on WATCHDOG && CPU_RM9000
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help
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Watchdog implementation using the GPI hardware found on
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PMC-Sierra RM9xxx CPUs.
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To compile this driver as a module, choose M here: the
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module will be called rm9k_wdt.
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# S390 Architecture
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# S390 Architecture
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config ZVM_WATCHDOG
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config ZVM_WATCHDOG
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@ -47,9 +47,10 @@ obj-$(CONFIG_IBMASR) += ibmasr.o
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obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o
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obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o
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obj-$(CONFIG_I6300ESB_WDT) += i6300esb.o
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obj-$(CONFIG_I6300ESB_WDT) += i6300esb.o
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obj-$(CONFIG_I8XX_TCO) += i8xx_tco.o
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obj-$(CONFIG_I8XX_TCO) += i8xx_tco.o
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obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o
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obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o iTCO_vendor_support.o
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obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
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obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
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obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
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obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
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obj-$(CONFIG_PC87413_WDT) += pc87413_wdt.o
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obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
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obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
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obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
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obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
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obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
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obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
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@ -72,6 +73,7 @@ obj-$(CONFIG_WATCHDOG_RTAS) += wdrtas.o
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# MIPS Architecture
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# MIPS Architecture
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obj-$(CONFIG_INDYDOG) += indydog.o
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obj-$(CONFIG_INDYDOG) += indydog.o
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obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
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# S390 Architecture
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# S390 Architecture
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@ -0,0 +1,307 @@
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/*
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* intel TCO vendor specific watchdog driver support
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*
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* (c) Copyright 2006 Wim Van Sebroeck <wim@iguana.be>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
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* provide warranty for any of this software. This material is
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* provided "AS-IS" and at no charge.
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*/
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/*
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* Includes, defines, variables, module parameters, ...
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*/
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/* Module and version information */
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#define DRV_NAME "iTCO_vendor_support"
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#define DRV_VERSION "1.01"
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#define DRV_RELDATE "11-Nov-2006"
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#define PFX DRV_NAME ": "
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/* Includes */
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#include <linux/module.h> /* For module specific items */
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#include <linux/moduleparam.h> /* For new moduleparam's */
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#include <linux/types.h> /* For standard types (like size_t) */
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#include <linux/errno.h> /* For the -ENODEV/... values */
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#include <linux/kernel.h> /* For printk/panic/... */
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#include <linux/init.h> /* For __init/__exit/... */
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#include <linux/ioport.h> /* For io-port access */
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#include <asm/io.h> /* For inb/outb/... */
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/* iTCO defines */
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#define SMI_EN acpibase + 0x30 /* SMI Control and Enable Register */
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#define TCOBASE acpibase + 0x60 /* TCO base address */
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#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
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/* List of vendor support modes */
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#define SUPERMICRO_OLD_BOARD 1 /* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */
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#define SUPERMICRO_NEW_BOARD 2 /* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems */
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static int vendorsupport = 0;
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module_param(vendorsupport, int, 0);
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MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default=0 (none), 1=SuperMicro Pent3, 2=SuperMicro Pent4+");
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/*
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* Vendor Specific Support
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*/
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/*
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* Vendor Support: 1
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* Board: Super Micro Computer Inc. 370SSE+-OEM1/P3TSSE
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* iTCO chipset: ICH2
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*
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* Code contributed by: R. Seretny <lkpatches@paypc.com>
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* Documentation obtained by R. Seretny from SuperMicro Technical Support
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*
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* To enable Watchdog function:
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* BIOS setup -> Power -> TCO Logic SMI Enable -> Within5Minutes
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* This setting enables SMI to clear the watchdog expired flag.
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* If BIOS or CPU fail which may cause SMI hang, then system will
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* reboot. When application starts to use watchdog function,
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* application has to take over the control from SMI.
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*
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* For P3TSSE, J36 jumper needs to be removed to enable the Watchdog
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* function.
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*
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* Note: The system will reboot when Expire Flag is set TWICE.
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* So, if the watchdog timer is 20 seconds, then the maximum hang
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* time is about 40 seconds, and the minimum hang time is about
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* 20.6 seconds.
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*/
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static void supermicro_old_pre_start(unsigned long acpibase)
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{
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unsigned long val32;
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val32 = inl(SMI_EN);
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val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
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outl(val32, SMI_EN); /* Needed to activate watchdog */
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}
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static void supermicro_old_pre_stop(unsigned long acpibase)
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{
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unsigned long val32;
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val32 = inl(SMI_EN);
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val32 &= 0x00002000; /* Turn on SMI clearing watchdog */
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outl(val32, SMI_EN); /* Needed to deactivate watchdog */
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}
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static void supermicro_old_pre_keepalive(unsigned long acpibase)
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{
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/* Reload TCO Timer (done in iTCO_wdt_keepalive) + */
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/* Clear "Expire Flag" (Bit 3 of TC01_STS register) */
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outb(0x08, TCO1_STS);
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}
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/*
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* Vendor Support: 2
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* Board: Super Micro Computer Inc. P4SBx, P4DPx
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* iTCO chipset: ICH4
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*
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* Code contributed by: R. Seretny <lkpatches@paypc.com>
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* Documentation obtained by R. Seretny from SuperMicro Technical Support
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*
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* To enable Watchdog function:
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* 1. BIOS
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* For P4SBx:
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* BIOS setup -> Advanced -> Integrated Peripherals -> Watch Dog Feature
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* For P4DPx:
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||||||
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* BIOS setup -> Advanced -> I/O Device Configuration -> Watch Dog
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* This setting enables or disables Watchdog function. When enabled, the
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* default watchdog timer is set to be 5 minutes (about 4’35”). It is
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* enough to load and run the OS. The application (service or driver) has
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* to take over the control once OS is running up and before watchdog
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* expires.
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*
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* 2. JUMPER
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* For P4SBx: JP39
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||||||
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* For P4DPx: JP37
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||||||
|
* This jumper is used for safety. Closed is enabled. This jumper
|
||||||
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* prevents user enables watchdog in BIOS by accident.
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||||||
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*
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||||||
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* To enable Watch Dog function, both BIOS and JUMPER must be enabled.
|
||||||
|
*
|
||||||
|
* The documentation lists motherboards P4SBx and P4DPx series as of
|
||||||
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* 20-March-2002. However, this code works flawlessly with much newer
|
||||||
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* motherboards, such as my X6DHR-8G2 (SuperServer 6014H-82).
|
||||||
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*
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||||||
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* The original iTCO driver as written does not actually reset the
|
||||||
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* watchdog timer on these machines, as a result they reboot after five
|
||||||
|
* minutes.
|
||||||
|
*
|
||||||
|
* NOTE: You may leave the Watchdog function disabled in the SuperMicro
|
||||||
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* BIOS to avoid a "boot-race"... This driver will enable watchdog
|
||||||
|
* functionality even if it's disabled in the BIOS once the /dev/watchdog
|
||||||
|
* file is opened.
|
||||||
|
*/
|
||||||
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|
||||||
|
/* I/O Port's */
|
||||||
|
#define SM_REGINDEX 0x2e /* SuperMicro ICH4+ Register Index */
|
||||||
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#define SM_DATAIO 0x2f /* SuperMicro ICH4+ Register Data I/O */
|
||||||
|
|
||||||
|
/* Control Register's */
|
||||||
|
#define SM_CTLPAGESW 0x07 /* SuperMicro ICH4+ Control Page Switch */
|
||||||
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#define SM_CTLPAGE 0x08 /* SuperMicro ICH4+ Control Page Num */
|
||||||
|
|
||||||
|
#define SM_WATCHENABLE 0x30 /* Watchdog enable: Bit 0: 0=off, 1=on */
|
||||||
|
|
||||||
|
#define SM_WATCHPAGE 0x87 /* Watchdog unlock control page */
|
||||||
|
|
||||||
|
#define SM_ENDWATCH 0xAA /* Watchdog lock control page */
|
||||||
|
|
||||||
|
#define SM_COUNTMODE 0xf5 /* Watchdog count mode select */
|
||||||
|
/* (Bit 3: 0 = seconds, 1 = minutes */
|
||||||
|
|
||||||
|
#define SM_WATCHTIMER 0xf6 /* 8-bits, Watchdog timer counter (RW) */
|
||||||
|
|
||||||
|
#define SM_RESETCONTROL 0xf7 /* Watchdog reset control */
|
||||||
|
/* Bit 6: timer is reset by kbd interrupt */
|
||||||
|
/* Bit 7: timer is reset by mouse interrupt */
|
||||||
|
|
||||||
|
static void supermicro_new_unlock_watchdog(void)
|
||||||
|
{
|
||||||
|
outb(SM_WATCHPAGE, SM_REGINDEX); /* Write 0x87 to port 0x2e twice */
|
||||||
|
outb(SM_WATCHPAGE, SM_REGINDEX);
|
||||||
|
|
||||||
|
outb(SM_CTLPAGESW, SM_REGINDEX); /* Switch to watchdog control page */
|
||||||
|
outb(SM_CTLPAGE, SM_DATAIO);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void supermicro_new_lock_watchdog(void)
|
||||||
|
{
|
||||||
|
outb(SM_ENDWATCH, SM_REGINDEX);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void supermicro_new_pre_start(unsigned int heartbeat)
|
||||||
|
{
|
||||||
|
unsigned int val;
|
||||||
|
|
||||||
|
supermicro_new_unlock_watchdog();
|
||||||
|
|
||||||
|
/* Watchdog timer setting needs to be in seconds*/
|
||||||
|
outb(SM_COUNTMODE, SM_REGINDEX);
|
||||||
|
val = inb(SM_DATAIO);
|
||||||
|
val &= 0xF7;
|
||||||
|
outb(val, SM_DATAIO);
|
||||||
|
|
||||||
|
/* Write heartbeat interval to WDOG */
|
||||||
|
outb (SM_WATCHTIMER, SM_REGINDEX);
|
||||||
|
outb((heartbeat & 255), SM_DATAIO);
|
||||||
|
|
||||||
|
/* Make sure keyboard/mouse interrupts don't interfere */
|
||||||
|
outb(SM_RESETCONTROL, SM_REGINDEX);
|
||||||
|
val = inb(SM_DATAIO);
|
||||||
|
val &= 0x3f;
|
||||||
|
outb(val, SM_DATAIO);
|
||||||
|
|
||||||
|
/* enable watchdog by setting bit 0 of Watchdog Enable to 1 */
|
||||||
|
outb(SM_WATCHENABLE, SM_REGINDEX);
|
||||||
|
val = inb(SM_DATAIO);
|
||||||
|
val |= 0x01;
|
||||||
|
outb(val, SM_DATAIO);
|
||||||
|
|
||||||
|
supermicro_new_lock_watchdog();
|
||||||
|
}
|
||||||
|
|
||||||
|
static void supermicro_new_pre_stop(void)
|
||||||
|
{
|
||||||
|
unsigned int val;
|
||||||
|
|
||||||
|
supermicro_new_unlock_watchdog();
|
||||||
|
|
||||||
|
/* disable watchdog by setting bit 0 of Watchdog Enable to 0 */
|
||||||
|
outb(SM_WATCHENABLE, SM_REGINDEX);
|
||||||
|
val = inb(SM_DATAIO);
|
||||||
|
val &= 0xFE;
|
||||||
|
outb(val, SM_DATAIO);
|
||||||
|
|
||||||
|
supermicro_new_lock_watchdog();
|
||||||
|
}
|
||||||
|
|
||||||
|
static void supermicro_new_pre_set_heartbeat(unsigned int heartbeat)
|
||||||
|
{
|
||||||
|
supermicro_new_unlock_watchdog();
|
||||||
|
|
||||||
|
/* reset watchdog timeout to heartveat value */
|
||||||
|
outb(SM_WATCHTIMER, SM_REGINDEX);
|
||||||
|
outb((heartbeat & 255), SM_DATAIO);
|
||||||
|
|
||||||
|
supermicro_new_lock_watchdog();
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Generic Support Functions
|
||||||
|
*/
|
||||||
|
|
||||||
|
void iTCO_vendor_pre_start(unsigned long acpibase,
|
||||||
|
unsigned int heartbeat)
|
||||||
|
{
|
||||||
|
if (vendorsupport == SUPERMICRO_OLD_BOARD)
|
||||||
|
supermicro_old_pre_start(acpibase);
|
||||||
|
else if (vendorsupport == SUPERMICRO_NEW_BOARD)
|
||||||
|
supermicro_new_pre_start(heartbeat);
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(iTCO_vendor_pre_start);
|
||||||
|
|
||||||
|
void iTCO_vendor_pre_stop(unsigned long acpibase)
|
||||||
|
{
|
||||||
|
if (vendorsupport == SUPERMICRO_OLD_BOARD)
|
||||||
|
supermicro_old_pre_stop(acpibase);
|
||||||
|
else if (vendorsupport == SUPERMICRO_NEW_BOARD)
|
||||||
|
supermicro_new_pre_stop();
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(iTCO_vendor_pre_stop);
|
||||||
|
|
||||||
|
void iTCO_vendor_pre_keepalive(unsigned long acpibase, unsigned int heartbeat)
|
||||||
|
{
|
||||||
|
if (vendorsupport == SUPERMICRO_OLD_BOARD)
|
||||||
|
supermicro_old_pre_keepalive(acpibase);
|
||||||
|
else if (vendorsupport == SUPERMICRO_NEW_BOARD)
|
||||||
|
supermicro_new_pre_set_heartbeat(heartbeat);
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(iTCO_vendor_pre_keepalive);
|
||||||
|
|
||||||
|
void iTCO_vendor_pre_set_heartbeat(unsigned int heartbeat)
|
||||||
|
{
|
||||||
|
if (vendorsupport == SUPERMICRO_NEW_BOARD)
|
||||||
|
supermicro_new_pre_set_heartbeat(heartbeat);
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(iTCO_vendor_pre_set_heartbeat);
|
||||||
|
|
||||||
|
int iTCO_vendor_check_noreboot_on(void)
|
||||||
|
{
|
||||||
|
switch(vendorsupport) {
|
||||||
|
case SUPERMICRO_OLD_BOARD:
|
||||||
|
return 0;
|
||||||
|
default:
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(iTCO_vendor_check_noreboot_on);
|
||||||
|
|
||||||
|
static int __init iTCO_vendor_init_module(void)
|
||||||
|
{
|
||||||
|
printk (KERN_INFO PFX "vendor-support=%d\n", vendorsupport);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit iTCO_vendor_exit_module(void)
|
||||||
|
{
|
||||||
|
printk (KERN_INFO PFX "Module Unloaded\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(iTCO_vendor_init_module);
|
||||||
|
module_exit(iTCO_vendor_exit_module);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>, R. Seretny <lkpatches@paypc.com>");
|
||||||
|
MODULE_DESCRIPTION("Intel TCO Vendor Specific WatchDog Timer Driver Support");
|
||||||
|
MODULE_VERSION(DRV_VERSION);
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
|
|
||||||
|
|
@ -48,8 +48,8 @@
|
||||||
|
|
||||||
/* Module and version information */
|
/* Module and version information */
|
||||||
#define DRV_NAME "iTCO_wdt"
|
#define DRV_NAME "iTCO_wdt"
|
||||||
#define DRV_VERSION "1.00"
|
#define DRV_VERSION "1.01"
|
||||||
#define DRV_RELDATE "08-Oct-2006"
|
#define DRV_RELDATE "11-Nov-2006"
|
||||||
#define PFX DRV_NAME ": "
|
#define PFX DRV_NAME ": "
|
||||||
|
|
||||||
/* Includes */
|
/* Includes */
|
||||||
|
|
@ -189,6 +189,21 @@ static int nowayout = WATCHDOG_NOWAYOUT;
|
||||||
module_param(nowayout, int, 0);
|
module_param(nowayout, int, 0);
|
||||||
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
|
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
|
||||||
|
|
||||||
|
/* iTCO Vendor Specific Support hooks */
|
||||||
|
#ifdef CONFIG_ITCO_VENDOR_SUPPORT
|
||||||
|
extern void iTCO_vendor_pre_start(unsigned long, unsigned int);
|
||||||
|
extern void iTCO_vendor_pre_stop(unsigned long);
|
||||||
|
extern void iTCO_vendor_pre_keepalive(unsigned long, unsigned int);
|
||||||
|
extern void iTCO_vendor_pre_set_heartbeat(unsigned int);
|
||||||
|
extern int iTCO_vendor_check_noreboot_on(void);
|
||||||
|
#else
|
||||||
|
#define iTCO_vendor_pre_start(acpibase, heartbeat) {}
|
||||||
|
#define iTCO_vendor_pre_stop(acpibase) {}
|
||||||
|
#define iTCO_vendor_pre_keepalive(acpibase,heartbeat) {}
|
||||||
|
#define iTCO_vendor_pre_set_heartbeat(heartbeat) {}
|
||||||
|
#define iTCO_vendor_check_noreboot_on() 1 /* 1=check noreboot; 0=don't check */
|
||||||
|
#endif
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Some TCO specific functions
|
* Some TCO specific functions
|
||||||
*/
|
*/
|
||||||
|
|
@ -249,6 +264,8 @@ static int iTCO_wdt_start(void)
|
||||||
|
|
||||||
spin_lock(&iTCO_wdt_private.io_lock);
|
spin_lock(&iTCO_wdt_private.io_lock);
|
||||||
|
|
||||||
|
iTCO_vendor_pre_start(iTCO_wdt_private.ACPIBASE, heartbeat);
|
||||||
|
|
||||||
/* disable chipset's NO_REBOOT bit */
|
/* disable chipset's NO_REBOOT bit */
|
||||||
if (iTCO_wdt_unset_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");
|
printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
|
||||||
|
|
@ -273,6 +290,8 @@ static int iTCO_wdt_stop(void)
|
||||||
|
|
||||||
spin_lock(&iTCO_wdt_private.io_lock);
|
spin_lock(&iTCO_wdt_private.io_lock);
|
||||||
|
|
||||||
|
iTCO_vendor_pre_stop(iTCO_wdt_private.ACPIBASE);
|
||||||
|
|
||||||
/* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */
|
/* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */
|
||||||
val = inw(TCO1_CNT);
|
val = inw(TCO1_CNT);
|
||||||
val |= 0x0800;
|
val |= 0x0800;
|
||||||
|
|
@ -293,6 +312,8 @@ static int iTCO_wdt_keepalive(void)
|
||||||
{
|
{
|
||||||
spin_lock(&iTCO_wdt_private.io_lock);
|
spin_lock(&iTCO_wdt_private.io_lock);
|
||||||
|
|
||||||
|
iTCO_vendor_pre_keepalive(iTCO_wdt_private.ACPIBASE, heartbeat);
|
||||||
|
|
||||||
/* Reload the timer by writing to the TCO Timer Counter register */
|
/* Reload the timer by writing to the TCO Timer Counter register */
|
||||||
if (iTCO_wdt_private.iTCO_version == 2) {
|
if (iTCO_wdt_private.iTCO_version == 2) {
|
||||||
outw(0x01, TCO_RLD);
|
outw(0x01, TCO_RLD);
|
||||||
|
|
@ -319,6 +340,8 @@ static int iTCO_wdt_set_heartbeat(int t)
|
||||||
((iTCO_wdt_private.iTCO_version == 1) && (tmrval > 0x03f)))
|
((iTCO_wdt_private.iTCO_version == 1) && (tmrval > 0x03f)))
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
|
|
||||||
|
iTCO_vendor_pre_set_heartbeat(tmrval);
|
||||||
|
|
||||||
/* Write new heartbeat to watchdog */
|
/* Write new heartbeat to watchdog */
|
||||||
if (iTCO_wdt_private.iTCO_version == 2) {
|
if (iTCO_wdt_private.iTCO_version == 2) {
|
||||||
spin_lock(&iTCO_wdt_private.io_lock);
|
spin_lock(&iTCO_wdt_private.io_lock);
|
||||||
|
|
@ -569,7 +592,7 @@ static int iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device_id *ent,
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Check chipset's NO_REBOOT bit */
|
/* Check chipset's NO_REBOOT bit */
|
||||||
if (iTCO_wdt_unset_NO_REBOOT_bit()) {
|
if (iTCO_wdt_unset_NO_REBOOT_bit() && iTCO_vendor_check_noreboot_on()) {
|
||||||
printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
|
printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
|
||||||
ret = -ENODEV; /* Cannot reset NO_REBOOT bit */
|
ret = -ENODEV; /* Cannot reset NO_REBOOT bit */
|
||||||
goto out;
|
goto out;
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,635 @@
|
||||||
|
/*
|
||||||
|
* NS pc87413-wdt Watchdog Timer driver for Linux 2.6.x.x
|
||||||
|
*
|
||||||
|
* This code is based on wdt.c with original copyright.
|
||||||
|
*
|
||||||
|
* (C) Copyright 2006 Sven Anders, <anders@anduras.de>
|
||||||
|
* and Marcus Junker, <junker@anduras.de>
|
||||||
|
*
|
||||||
|
* 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 Sven Anders, 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.
|
||||||
|
*
|
||||||
|
* Release 1.1
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/types.h>
|
||||||
|
#include <linux/miscdevice.h>
|
||||||
|
#include <linux/watchdog.h>
|
||||||
|
#include <linux/ioport.h>
|
||||||
|
#include <linux/delay.h>
|
||||||
|
#include <linux/notifier.h>
|
||||||
|
#include <linux/fs.h>
|
||||||
|
#include <linux/reboot.h>
|
||||||
|
#include <linux/init.h>
|
||||||
|
#include <linux/spinlock.h>
|
||||||
|
#include <linux/moduleparam.h>
|
||||||
|
#include <linux/version.h>
|
||||||
|
|
||||||
|
#include <asm/io.h>
|
||||||
|
#include <asm/uaccess.h>
|
||||||
|
#include <asm/system.h>
|
||||||
|
|
||||||
|
/* #define DEBUG 1 */
|
||||||
|
|
||||||
|
#define DEFAULT_TIMEOUT 1 /* 1 minute */
|
||||||
|
#define MAX_TIMEOUT 255
|
||||||
|
|
||||||
|
#define VERSION "1.1"
|
||||||
|
#define MODNAME "pc87413 WDT"
|
||||||
|
#define PFX MODNAME ": "
|
||||||
|
#define DPFX MODNAME " - DEBUG: "
|
||||||
|
|
||||||
|
#define WDT_INDEX_IO_PORT (io+0) /* I/O port base (index register) */
|
||||||
|
#define WDT_DATA_IO_PORT (WDT_INDEX_IO_PORT+1)
|
||||||
|
#define SWC_LDN 0x04
|
||||||
|
#define SIOCFG2 0x22 /* Serial IO register */
|
||||||
|
#define WDCTL 0x10 /* Watchdog-Timer-Controll-Register */
|
||||||
|
#define WDTO 0x11 /* Watchdog timeout register */
|
||||||
|
#define WDCFG 0x12 /* Watchdog config register */
|
||||||
|
|
||||||
|
static int io = 0x2E; /* Address used on Portwell Boards */
|
||||||
|
|
||||||
|
static int timeout = DEFAULT_TIMEOUT; /* timeout value */
|
||||||
|
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 ----------------------------------------*/
|
||||||
|
|
||||||
|
/* Select pins for Watchdog output */
|
||||||
|
|
||||||
|
static inline void pc87413_select_wdt_out (void)
|
||||||
|
{
|
||||||
|
unsigned int cr_data = 0;
|
||||||
|
|
||||||
|
/* Step 1: Select multiple pin,pin55,as WDT output */
|
||||||
|
|
||||||
|
outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
|
||||||
|
|
||||||
|
cr_data = inb (WDT_DATA_IO_PORT);
|
||||||
|
|
||||||
|
cr_data |= 0x80; /* Set Bit7 to 1*/
|
||||||
|
outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
|
||||||
|
|
||||||
|
outb_p(cr_data, WDT_DATA_IO_PORT);
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "Select multiple pin,pin55,as WDT output:"
|
||||||
|
" Bit7 to 1: %d\n", cr_data);
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Enable SWC functions */
|
||||||
|
|
||||||
|
static inline void pc87413_enable_swc(void)
|
||||||
|
{
|
||||||
|
unsigned int cr_data=0;
|
||||||
|
|
||||||
|
/* Step 2: Enable SWC functions */
|
||||||
|
|
||||||
|
outb_p(0x07, WDT_INDEX_IO_PORT); /* Point SWC_LDN (LDN=4) */
|
||||||
|
outb_p(SWC_LDN, WDT_DATA_IO_PORT);
|
||||||
|
|
||||||
|
outb_p(0x30, WDT_INDEX_IO_PORT); /* Read Index 0x30 First */
|
||||||
|
cr_data = inb(WDT_DATA_IO_PORT);
|
||||||
|
cr_data |= 0x01; /* Set Bit0 to 1 */
|
||||||
|
outb_p(0x30, WDT_INDEX_IO_PORT);
|
||||||
|
outb_p(cr_data, WDT_DATA_IO_PORT); /* Index0x30_bit0P1 */
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "pc87413 - Enable SWC functions\n");
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Read SWC I/O base address */
|
||||||
|
|
||||||
|
static inline unsigned int pc87413_get_swc_base(void)
|
||||||
|
{
|
||||||
|
unsigned int swc_base_addr = 0;
|
||||||
|
unsigned char addr_l, addr_h = 0;
|
||||||
|
|
||||||
|
/* Step 3: Read SWC I/O Base Address */
|
||||||
|
|
||||||
|
outb_p(0x60, WDT_INDEX_IO_PORT); /* Read Index 0x60 */
|
||||||
|
addr_h = inb(WDT_DATA_IO_PORT);
|
||||||
|
|
||||||
|
outb_p(0x61, WDT_INDEX_IO_PORT); /* Read Index 0x61 */
|
||||||
|
|
||||||
|
addr_l = inb(WDT_DATA_IO_PORT);
|
||||||
|
|
||||||
|
swc_base_addr = (addr_h << 8) + addr_l;
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "Read SWC I/O Base Address: low %d, high %d,"
|
||||||
|
" res %d\n", addr_l, addr_h, swc_base_addr);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
return swc_base_addr;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Select Bank 3 of SWC */
|
||||||
|
|
||||||
|
static inline void pc87413_swc_bank3(unsigned int swc_base_addr)
|
||||||
|
{
|
||||||
|
/* Step 4: Select Bank3 of SWC */
|
||||||
|
|
||||||
|
outb_p(inb(swc_base_addr + 0x0f) | 0x03, swc_base_addr + 0x0f);
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "Select Bank3 of SWC\n");
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Set watchdog timeout to x minutes */
|
||||||
|
|
||||||
|
static inline void pc87413_programm_wdto(unsigned int swc_base_addr,
|
||||||
|
char pc87413_time)
|
||||||
|
{
|
||||||
|
/* Step 5: Programm WDTO, Twd. */
|
||||||
|
|
||||||
|
outb_p(pc87413_time, swc_base_addr + WDTO);
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "Set WDTO to %d minutes\n", pc87413_time);
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Enable WDEN */
|
||||||
|
|
||||||
|
static inline void pc87413_enable_wden(unsigned int swc_base_addr)
|
||||||
|
{
|
||||||
|
/* Step 6: Enable WDEN */
|
||||||
|
|
||||||
|
outb_p(inb (swc_base_addr + WDCTL) | 0x01, swc_base_addr + WDCTL);
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "Enable WDEN\n");
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Enable SW_WD_TREN */
|
||||||
|
static inline void pc87413_enable_sw_wd_tren(unsigned int swc_base_addr)
|
||||||
|
{
|
||||||
|
/* Enable SW_WD_TREN */
|
||||||
|
|
||||||
|
outb_p(inb (swc_base_addr + WDCFG) | 0x80, swc_base_addr + WDCFG);
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "Enable SW_WD_TREN\n");
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Disable SW_WD_TREN */
|
||||||
|
|
||||||
|
static inline void pc87413_disable_sw_wd_tren(unsigned int swc_base_addr)
|
||||||
|
{
|
||||||
|
/* Disable SW_WD_TREN */
|
||||||
|
|
||||||
|
outb_p(inb (swc_base_addr + WDCFG) & 0x7f, swc_base_addr + WDCFG);
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "pc87413 - Disable SW_WD_TREN\n");
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Enable SW_WD_TRG */
|
||||||
|
|
||||||
|
static inline void pc87413_enable_sw_wd_trg(unsigned int swc_base_addr)
|
||||||
|
{
|
||||||
|
/* Enable SW_WD_TRG */
|
||||||
|
|
||||||
|
outb_p(inb (swc_base_addr + WDCTL) | 0x80, swc_base_addr + WDCTL);
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "pc87413 - Enable SW_WD_TRG\n");
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Disable SW_WD_TRG */
|
||||||
|
|
||||||
|
static inline void pc87413_disable_sw_wd_trg(unsigned int swc_base_addr)
|
||||||
|
{
|
||||||
|
/* Disable SW_WD_TRG */
|
||||||
|
|
||||||
|
outb_p(inb (swc_base_addr + WDCTL) & 0x7f, swc_base_addr + WDCTL);
|
||||||
|
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "Disable SW_WD_TRG\n");
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* -- Higher level functions ------------------------------------*/
|
||||||
|
|
||||||
|
/* Enable the watchdog */
|
||||||
|
|
||||||
|
static void pc87413_enable(void)
|
||||||
|
{
|
||||||
|
unsigned int swc_base_addr;
|
||||||
|
|
||||||
|
spin_lock(&io_lock);
|
||||||
|
|
||||||
|
pc87413_select_wdt_out();
|
||||||
|
pc87413_enable_swc();
|
||||||
|
swc_base_addr = pc87413_get_swc_base();
|
||||||
|
pc87413_swc_bank3(swc_base_addr);
|
||||||
|
pc87413_programm_wdto(swc_base_addr, timeout);
|
||||||
|
pc87413_enable_wden(swc_base_addr);
|
||||||
|
pc87413_enable_sw_wd_tren(swc_base_addr);
|
||||||
|
pc87413_enable_sw_wd_trg(swc_base_addr);
|
||||||
|
|
||||||
|
spin_unlock(&io_lock);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Disable the watchdog */
|
||||||
|
|
||||||
|
static void pc87413_disable(void)
|
||||||
|
{
|
||||||
|
unsigned int swc_base_addr;
|
||||||
|
|
||||||
|
spin_lock(&io_lock);
|
||||||
|
|
||||||
|
pc87413_select_wdt_out();
|
||||||
|
pc87413_enable_swc();
|
||||||
|
swc_base_addr = pc87413_get_swc_base();
|
||||||
|
pc87413_swc_bank3(swc_base_addr);
|
||||||
|
pc87413_disable_sw_wd_tren(swc_base_addr);
|
||||||
|
pc87413_disable_sw_wd_trg(swc_base_addr);
|
||||||
|
pc87413_programm_wdto(swc_base_addr, 0);
|
||||||
|
|
||||||
|
spin_unlock(&io_lock);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Refresh the watchdog */
|
||||||
|
|
||||||
|
static void pc87413_refresh(void)
|
||||||
|
{
|
||||||
|
unsigned int swc_base_addr;
|
||||||
|
|
||||||
|
spin_lock(&io_lock);
|
||||||
|
|
||||||
|
pc87413_select_wdt_out();
|
||||||
|
pc87413_enable_swc();
|
||||||
|
swc_base_addr = pc87413_get_swc_base();
|
||||||
|
pc87413_swc_bank3(swc_base_addr);
|
||||||
|
pc87413_disable_sw_wd_tren(swc_base_addr);
|
||||||
|
pc87413_disable_sw_wd_trg(swc_base_addr);
|
||||||
|
pc87413_programm_wdto(swc_base_addr, timeout);
|
||||||
|
pc87413_enable_wden(swc_base_addr);
|
||||||
|
pc87413_enable_sw_wd_tren(swc_base_addr);
|
||||||
|
pc87413_enable_sw_wd_trg(swc_base_addr);
|
||||||
|
|
||||||
|
spin_unlock(&io_lock);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* -- File operations -------------------------------------------*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* pc87413_open:
|
||||||
|
* @inode: inode of device
|
||||||
|
* @file: file handle to device
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int pc87413_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 */
|
||||||
|
pc87413_refresh();
|
||||||
|
|
||||||
|
printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to"
|
||||||
|
" %d minute(s).\n", timeout);
|
||||||
|
|
||||||
|
return nonseekable_open(inode, file);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* pc87413_release:
|
||||||
|
* @inode: inode to board
|
||||||
|
* @file: file handle to board
|
||||||
|
*
|
||||||
|
* The watchdog has a configurable API. There is a religious dispute
|
||||||
|
* between people who want their watchdog to be able to shut down and
|
||||||
|
* those who want to be sure if the watchdog manager dies the machine
|
||||||
|
* reboots. In the former case we disable the counters, in the latter
|
||||||
|
* case you have to open it again very soon.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int pc87413_release(struct inode *inode, struct file *file)
|
||||||
|
{
|
||||||
|
/* Shut off the timer. */
|
||||||
|
|
||||||
|
if (expect_close == 42) {
|
||||||
|
pc87413_disable();
|
||||||
|
printk(KERN_INFO MODNAME "Watchdog disabled,"
|
||||||
|
" sleeping again...\n");
|
||||||
|
} else {
|
||||||
|
printk(KERN_CRIT MODNAME "Unexpected close, not stopping"
|
||||||
|
" watchdog!\n");
|
||||||
|
pc87413_refresh();
|
||||||
|
}
|
||||||
|
|
||||||
|
clear_bit(0, &timer_enabled);
|
||||||
|
expect_close = 0;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* pc87413_status:
|
||||||
|
*
|
||||||
|
* return, if the watchdog is enabled (timeout is set...)
|
||||||
|
*/
|
||||||
|
|
||||||
|
|
||||||
|
static int pc87413_status(void)
|
||||||
|
{
|
||||||
|
return 0; /* currently not supported */
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* pc87413_write:
|
||||||
|
* @file: file handle to the watchdog
|
||||||
|
* @data: data buffer to write
|
||||||
|
* @len: length in bytes
|
||||||
|
* @ppos: pointer to the position to write. No seeks allowed
|
||||||
|
*
|
||||||
|
* A write to a watchdog device is defined as a keepalive signal. Any
|
||||||
|
* write of data will do, as we we don't define content meaning.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static ssize_t pc87413_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 */
|
||||||
|
pc87413_refresh();
|
||||||
|
}
|
||||||
|
return len;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* pc87413_ioctl:
|
||||||
|
* @inode: inode of the device
|
||||||
|
* @file: file handle to the device
|
||||||
|
* @cmd: watchdog command
|
||||||
|
* @arg: argument pointer
|
||||||
|
*
|
||||||
|
* The watchdog API defines a common set of functions for all watchdogs
|
||||||
|
* according to their available features. We only actually usefully support
|
||||||
|
* querying capabilities and current status.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int pc87413_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 = 1,
|
||||||
|
.identity = "PC87413(HF/F) 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(pc87413_status(), uarg.i);
|
||||||
|
|
||||||
|
case WDIOC_GETBOOTSTATUS:
|
||||||
|
return put_user(0, uarg.i);
|
||||||
|
|
||||||
|
case WDIOC_KEEPALIVE:
|
||||||
|
pc87413_refresh();
|
||||||
|
#ifdef DEBUG
|
||||||
|
printk(KERN_INFO DPFX "keepalive\n");
|
||||||
|
#endif
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
case WDIOC_SETTIMEOUT:
|
||||||
|
if (get_user(new_timeout, uarg.i))
|
||||||
|
return -EFAULT;
|
||||||
|
|
||||||
|
// the API states this is given in secs
|
||||||
|
new_timeout /= 60;
|
||||||
|
|
||||||
|
if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
timeout = new_timeout;
|
||||||
|
pc87413_refresh();
|
||||||
|
|
||||||
|
// fall through and return the new timeout...
|
||||||
|
|
||||||
|
case WDIOC_GETTIMEOUT:
|
||||||
|
|
||||||
|
new_timeout = 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) {
|
||||||
|
pc87413_disable();
|
||||||
|
retval = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (options & WDIOS_ENABLECARD) {
|
||||||
|
pc87413_enable();
|
||||||
|
retval = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
return retval;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* -- Notifier funtions -----------------------------------------*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* notify_sys:
|
||||||
|
* @this: our notifier block
|
||||||
|
* @code: the event being reported
|
||||||
|
* @unused: unused
|
||||||
|
*
|
||||||
|
* Our notifier is called on system shutdowns. We want to turn the card
|
||||||
|
* off at reboot otherwise the machine will reboot again during memory
|
||||||
|
* test or worse yet during the following fsck. This would suck, in fact
|
||||||
|
* trust me - if it happens it does suck.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int pc87413_notify_sys(struct notifier_block *this,
|
||||||
|
unsigned long code,
|
||||||
|
void *unused)
|
||||||
|
{
|
||||||
|
if (code == SYS_DOWN || code == SYS_HALT)
|
||||||
|
{
|
||||||
|
/* Turn the card off */
|
||||||
|
pc87413_disable();
|
||||||
|
}
|
||||||
|
return NOTIFY_DONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* -- Module's structures ---------------------------------------*/
|
||||||
|
|
||||||
|
static struct file_operations pc87413_fops = {
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.llseek = no_llseek,
|
||||||
|
.write = pc87413_write,
|
||||||
|
.ioctl = pc87413_ioctl,
|
||||||
|
.open = pc87413_open,
|
||||||
|
.release = pc87413_release,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct notifier_block pc87413_notifier =
|
||||||
|
{
|
||||||
|
.notifier_call = pc87413_notify_sys,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct miscdevice pc87413_miscdev=
|
||||||
|
{
|
||||||
|
.minor = WATCHDOG_MINOR,
|
||||||
|
.name = "watchdog",
|
||||||
|
.fops = &pc87413_fops
|
||||||
|
};
|
||||||
|
|
||||||
|
/* -- Module init functions -------------------------------------*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* pc87413_init: module's "constructor"
|
||||||
|
*
|
||||||
|
* Set up the WDT watchdog board. All we have to do is grab the
|
||||||
|
* resources we require and bitch if anyone beat us to them.
|
||||||
|
* The open() function will actually kick the board off.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int __init pc87413_init(void)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
spin_lock_init(&io_lock);
|
||||||
|
|
||||||
|
printk(KERN_INFO PFX "Version " VERSION " at io 0x%X\n", WDT_INDEX_IO_PORT);
|
||||||
|
|
||||||
|
/* request_region(io, 2, "pc87413"); */
|
||||||
|
|
||||||
|
ret = register_reboot_notifier(&pc87413_notifier);
|
||||||
|
if (ret != 0) {
|
||||||
|
printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
|
||||||
|
ret);
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = misc_register(&pc87413_miscdev);
|
||||||
|
|
||||||
|
if (ret != 0) {
|
||||||
|
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
|
||||||
|
WATCHDOG_MINOR, ret);
|
||||||
|
unregister_reboot_notifier(&pc87413_notifier);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
printk(KERN_INFO PFX "initialized. timeout=%d min \n", timeout);
|
||||||
|
|
||||||
|
pc87413_enable();
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* pc87413_exit: module's "destructor"
|
||||||
|
*
|
||||||
|
* Unload the watchdog. You cannot do this with any file handles open.
|
||||||
|
* If your watchdog is set to continue ticking on close and you unload
|
||||||
|
* it, well it keeps ticking. We won't get the interrupt but the board
|
||||||
|
* will not touch PC memory so all is fine. You just have to load a new
|
||||||
|
* module in 60 seconds or reboot.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static void __exit pc87413_exit(void)
|
||||||
|
{
|
||||||
|
/* Stop the timer before we leave */
|
||||||
|
if (!nowayout)
|
||||||
|
{
|
||||||
|
pc87413_disable();
|
||||||
|
printk(KERN_INFO MODNAME "Watchdog disabled.\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
misc_deregister(&pc87413_miscdev);
|
||||||
|
unregister_reboot_notifier(&pc87413_notifier);
|
||||||
|
/* release_region(io,2); */
|
||||||
|
|
||||||
|
printk(MODNAME " watchdog component driver removed.\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(pc87413_init);
|
||||||
|
module_exit(pc87413_exit);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Sven Anders <anders@anduras.de>, Marcus Junker <junker@anduras.de>,");
|
||||||
|
MODULE_DESCRIPTION("PC87413 WDT driver");
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
|
|
||||||
|
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||||
|
|
||||||
|
module_param(io, int, 0);
|
||||||
|
MODULE_PARM_DESC(io, MODNAME " I/O port (default: " __MODULE_STRING(io) ").");
|
||||||
|
|
||||||
|
module_param(timeout, int, 0);
|
||||||
|
MODULE_PARM_DESC(timeout, "Watchdog timeout in minutes (default=" __MODULE_STRING(timeout) ").");
|
||||||
|
|
||||||
|
module_param(nowayout, int, 0);
|
||||||
|
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
|
||||||
|
|
||||||
|
|
@ -0,0 +1,420 @@
|
||||||
|
/*
|
||||||
|
* Watchdog implementation for GPI h/w found on PMC-Sierra RM9xxx
|
||||||
|
* chips.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2004 by Basler Vision Technologies AG
|
||||||
|
* Author: Thomas Koeller <thomas.koeller@baslerweb.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.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program; if not, write to the Free Software
|
||||||
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/platform_device.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/moduleparam.h>
|
||||||
|
#include <linux/interrupt.h>
|
||||||
|
#include <linux/fs.h>
|
||||||
|
#include <linux/reboot.h>
|
||||||
|
#include <linux/notifier.h>
|
||||||
|
#include <linux/miscdevice.h>
|
||||||
|
#include <linux/watchdog.h>
|
||||||
|
#include <asm/io.h>
|
||||||
|
#include <asm/atomic.h>
|
||||||
|
#include <asm/processor.h>
|
||||||
|
#include <asm/uaccess.h>
|
||||||
|
#include <asm/system.h>
|
||||||
|
#include <asm/rm9k-ocd.h>
|
||||||
|
|
||||||
|
#include <rm9k_wdt.h>
|
||||||
|
|
||||||
|
|
||||||
|
#define CLOCK 125000000
|
||||||
|
#define MAX_TIMEOUT_SECONDS 32
|
||||||
|
#define CPCCR 0x0080
|
||||||
|
#define CPGIG1SR 0x0044
|
||||||
|
#define CPGIG1ER 0x0054
|
||||||
|
|
||||||
|
|
||||||
|
/* Function prototypes */
|
||||||
|
static irqreturn_t wdt_gpi_irqhdl(int, void *, struct pt_regs *);
|
||||||
|
static void wdt_gpi_start(void);
|
||||||
|
static void wdt_gpi_stop(void);
|
||||||
|
static void wdt_gpi_set_timeout(unsigned int);
|
||||||
|
static int wdt_gpi_open(struct inode *, struct file *);
|
||||||
|
static int wdt_gpi_release(struct inode *, struct file *);
|
||||||
|
static ssize_t wdt_gpi_write(struct file *, const char __user *, size_t, loff_t *);
|
||||||
|
static long wdt_gpi_ioctl(struct file *, unsigned int, unsigned long);
|
||||||
|
static int wdt_gpi_notify(struct notifier_block *, unsigned long, void *);
|
||||||
|
static const struct resource *wdt_gpi_get_resource(struct platform_device *, const char *, unsigned int);
|
||||||
|
static int __init wdt_gpi_probe(struct device *);
|
||||||
|
static int __exit wdt_gpi_remove(struct device *);
|
||||||
|
|
||||||
|
|
||||||
|
static const char wdt_gpi_name[] = "wdt_gpi";
|
||||||
|
static atomic_t opencnt;
|
||||||
|
static int expect_close;
|
||||||
|
static int locked;
|
||||||
|
|
||||||
|
|
||||||
|
/* These are set from device resources */
|
||||||
|
static void __iomem * wd_regs;
|
||||||
|
static unsigned int wd_irq, wd_ctr;
|
||||||
|
|
||||||
|
|
||||||
|
/* Module arguments */
|
||||||
|
static int timeout = MAX_TIMEOUT_SECONDS;
|
||||||
|
module_param(timeout, int, 0444);
|
||||||
|
MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds");
|
||||||
|
|
||||||
|
static unsigned long resetaddr = 0xbffdc200;
|
||||||
|
module_param(resetaddr, ulong, 0444);
|
||||||
|
MODULE_PARM_DESC(resetaddr, "Address to write to to force a reset");
|
||||||
|
|
||||||
|
static unsigned long flagaddr = 0xbffdc104;
|
||||||
|
module_param(flagaddr, ulong, 0444);
|
||||||
|
MODULE_PARM_DESC(flagaddr, "Address to write to boot flags to");
|
||||||
|
|
||||||
|
static int powercycle;
|
||||||
|
module_param(powercycle, bool, 0444);
|
||||||
|
MODULE_PARM_DESC(powercycle, "Cycle power if watchdog expires");
|
||||||
|
|
||||||
|
static int nowayout = WATCHDOG_NOWAYOUT;
|
||||||
|
module_param(nowayout, bool, 0444);
|
||||||
|
MODULE_PARM_DESC(nowayout, "Watchdog cannot be disabled once started");
|
||||||
|
|
||||||
|
|
||||||
|
/* Interrupt handler */
|
||||||
|
static irqreturn_t wdt_gpi_irqhdl(int irq, void *ctxt, struct pt_regs *regs)
|
||||||
|
{
|
||||||
|
if (!unlikely(__raw_readl(wd_regs + 0x0008) & 0x1))
|
||||||
|
return IRQ_NONE;
|
||||||
|
__raw_writel(0x1, wd_regs + 0x0008);
|
||||||
|
|
||||||
|
|
||||||
|
printk(KERN_CRIT "%s: watchdog expired - resetting system\n",
|
||||||
|
wdt_gpi_name);
|
||||||
|
|
||||||
|
*(volatile char *) flagaddr |= 0x01;
|
||||||
|
*(volatile char *) resetaddr = powercycle ? 0x01 : 0x2;
|
||||||
|
iob();
|
||||||
|
while (1)
|
||||||
|
cpu_relax();
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* Watchdog functions */
|
||||||
|
static void wdt_gpi_start(void)
|
||||||
|
{
|
||||||
|
u32 reg;
|
||||||
|
|
||||||
|
lock_titan_regs();
|
||||||
|
reg = titan_readl(CPGIG1ER);
|
||||||
|
titan_writel(reg | (0x100 << wd_ctr), CPGIG1ER);
|
||||||
|
iob();
|
||||||
|
unlock_titan_regs();
|
||||||
|
}
|
||||||
|
|
||||||
|
static void wdt_gpi_stop(void)
|
||||||
|
{
|
||||||
|
u32 reg;
|
||||||
|
|
||||||
|
lock_titan_regs();
|
||||||
|
reg = titan_readl(CPCCR) & ~(0xf << (wd_ctr * 4));
|
||||||
|
titan_writel(reg, CPCCR);
|
||||||
|
reg = titan_readl(CPGIG1ER);
|
||||||
|
titan_writel(reg & ~(0x100 << wd_ctr), CPGIG1ER);
|
||||||
|
iob();
|
||||||
|
unlock_titan_regs();
|
||||||
|
}
|
||||||
|
|
||||||
|
static void wdt_gpi_set_timeout(unsigned int to)
|
||||||
|
{
|
||||||
|
u32 reg;
|
||||||
|
const u32 wdval = (to * CLOCK) & ~0x0000000f;
|
||||||
|
|
||||||
|
lock_titan_regs();
|
||||||
|
reg = titan_readl(CPCCR) & ~(0xf << (wd_ctr * 4));
|
||||||
|
titan_writel(reg, CPCCR);
|
||||||
|
wmb();
|
||||||
|
__raw_writel(wdval, wd_regs + 0x0000);
|
||||||
|
wmb();
|
||||||
|
titan_writel(reg | (0x2 << (wd_ctr * 4)), CPCCR);
|
||||||
|
wmb();
|
||||||
|
titan_writel(reg | (0x5 << (wd_ctr * 4)), CPCCR);
|
||||||
|
iob();
|
||||||
|
unlock_titan_regs();
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* /dev/watchdog operations */
|
||||||
|
static int wdt_gpi_open(struct inode *inode, struct file *file)
|
||||||
|
{
|
||||||
|
int res;
|
||||||
|
|
||||||
|
if (unlikely(atomic_dec_if_positive(&opencnt) < 0))
|
||||||
|
return -EBUSY;
|
||||||
|
|
||||||
|
expect_close = 0;
|
||||||
|
if (locked) {
|
||||||
|
module_put(THIS_MODULE);
|
||||||
|
free_irq(wd_irq, &miscdev);
|
||||||
|
locked = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
res = request_irq(wd_irq, wdt_gpi_irqhdl, SA_SHIRQ | SA_INTERRUPT,
|
||||||
|
wdt_gpi_name, &miscdev);
|
||||||
|
if (unlikely(res))
|
||||||
|
return res;
|
||||||
|
|
||||||
|
wdt_gpi_set_timeout(timeout);
|
||||||
|
wdt_gpi_start();
|
||||||
|
|
||||||
|
printk(KERN_INFO "%s: watchdog started, timeout = %u seconds\n",
|
||||||
|
wdt_gpi_name, timeout);
|
||||||
|
return nonseekable_open(inode, file);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int wdt_gpi_release(struct inode *inode, struct file *file)
|
||||||
|
{
|
||||||
|
if (nowayout) {
|
||||||
|
printk(KERN_INFO "%s: no way out - watchdog left running\n",
|
||||||
|
wdt_gpi_name);
|
||||||
|
__module_get(THIS_MODULE);
|
||||||
|
locked = 1;
|
||||||
|
} else {
|
||||||
|
if (expect_close) {
|
||||||
|
wdt_gpi_stop();
|
||||||
|
free_irq(wd_irq, &miscdev);
|
||||||
|
printk(KERN_INFO "%s: watchdog stopped\n", wdt_gpi_name);
|
||||||
|
} else {
|
||||||
|
printk(KERN_CRIT "%s: unexpected close() -"
|
||||||
|
" watchdog left running\n",
|
||||||
|
wdt_gpi_name);
|
||||||
|
wdt_gpi_set_timeout(timeout);
|
||||||
|
__module_get(THIS_MODULE);
|
||||||
|
locked = 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
atomic_inc(&opencnt);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t
|
||||||
|
wdt_gpi_write(struct file *f, const char __user *d, size_t s, loff_t *o)
|
||||||
|
{
|
||||||
|
char val;
|
||||||
|
|
||||||
|
wdt_gpi_set_timeout(timeout);
|
||||||
|
expect_close = (s > 0) && !get_user(val, d) && (val == 'V');
|
||||||
|
return s ? 1 : 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static long
|
||||||
|
wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
|
||||||
|
{
|
||||||
|
long res = -ENOTTY;
|
||||||
|
const long size = _IOC_SIZE(cmd);
|
||||||
|
int stat;
|
||||||
|
void __user *argp = (void __user *)arg;
|
||||||
|
static struct watchdog_info wdinfo = {
|
||||||
|
.identity = "RM9xxx/GPI watchdog",
|
||||||
|
.firmware_version = 0,
|
||||||
|
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING
|
||||||
|
};
|
||||||
|
|
||||||
|
if (unlikely(_IOC_TYPE(cmd) != WATCHDOG_IOCTL_BASE))
|
||||||
|
return -ENOTTY;
|
||||||
|
|
||||||
|
if ((_IOC_DIR(cmd) & _IOC_READ)
|
||||||
|
&& !access_ok(VERIFY_WRITE, arg, size))
|
||||||
|
return -EFAULT;
|
||||||
|
|
||||||
|
if ((_IOC_DIR(cmd) & _IOC_WRITE)
|
||||||
|
&& !access_ok(VERIFY_READ, arg, size))
|
||||||
|
return -EFAULT;
|
||||||
|
|
||||||
|
expect_close = 0;
|
||||||
|
|
||||||
|
switch (cmd) {
|
||||||
|
case WDIOC_GETSUPPORT:
|
||||||
|
wdinfo.options = nowayout ?
|
||||||
|
WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING :
|
||||||
|
WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE;
|
||||||
|
res = __copy_to_user(argp, &wdinfo, size) ? -EFAULT : size;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case WDIOC_GETSTATUS:
|
||||||
|
break;
|
||||||
|
|
||||||
|
case WDIOC_GETBOOTSTATUS:
|
||||||
|
stat = (*(volatile char *) flagaddr & 0x01)
|
||||||
|
? WDIOF_CARDRESET : 0;
|
||||||
|
res = __copy_to_user(argp, &stat, size) ?
|
||||||
|
-EFAULT : size;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case WDIOC_SETOPTIONS:
|
||||||
|
break;
|
||||||
|
|
||||||
|
case WDIOC_KEEPALIVE:
|
||||||
|
wdt_gpi_set_timeout(timeout);
|
||||||
|
res = size;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case WDIOC_SETTIMEOUT:
|
||||||
|
{
|
||||||
|
int val;
|
||||||
|
if (unlikely(__copy_from_user(&val, argp, size))) {
|
||||||
|
res = -EFAULT;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (val > MAX_TIMEOUT_SECONDS)
|
||||||
|
val = MAX_TIMEOUT_SECONDS;
|
||||||
|
timeout = val;
|
||||||
|
wdt_gpi_set_timeout(val);
|
||||||
|
res = size;
|
||||||
|
printk(KERN_INFO "%s: timeout set to %u seconds\n",
|
||||||
|
wdt_gpi_name, timeout);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
case WDIOC_GETTIMEOUT:
|
||||||
|
res = __copy_to_user(argp, &timeout, size) ?
|
||||||
|
-EFAULT : size;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* Shutdown notifier */
|
||||||
|
static int
|
||||||
|
wdt_gpi_notify(struct notifier_block *this, unsigned long code, void *unused)
|
||||||
|
{
|
||||||
|
if (code == SYS_DOWN || code == SYS_HALT)
|
||||||
|
wdt_gpi_stop();
|
||||||
|
|
||||||
|
return NOTIFY_DONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* Kernel interfaces */
|
||||||
|
static struct file_operations fops = {
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.open = wdt_gpi_open,
|
||||||
|
.release = wdt_gpi_release,
|
||||||
|
.write = wdt_gpi_write,
|
||||||
|
.unlocked_ioctl = wdt_gpi_ioctl,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct miscdevice miscdev = {
|
||||||
|
.minor = WATCHDOG_MINOR,
|
||||||
|
.name = wdt_gpi_name,
|
||||||
|
.fops = &fops,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct notifier_block wdt_gpi_shutdown = {
|
||||||
|
.notifier_call = wdt_gpi_notify,
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
/* Init & exit procedures */
|
||||||
|
static const struct resource *
|
||||||
|
wdt_gpi_get_resource(struct platform_device *pdv, const char *name,
|
||||||
|
unsigned int type)
|
||||||
|
{
|
||||||
|
char buf[80];
|
||||||
|
if (snprintf(buf, sizeof buf, "%s_0", name) >= sizeof buf)
|
||||||
|
return NULL;
|
||||||
|
return platform_get_resource_byname(pdv, type, buf);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* No hotplugging on the platform bus - use __init */
|
||||||
|
static int __init wdt_gpi_probe(struct device *dev)
|
||||||
|
{
|
||||||
|
int res;
|
||||||
|
struct platform_device * const pdv = to_platform_device(dev);
|
||||||
|
const struct resource
|
||||||
|
* const rr = wdt_gpi_get_resource(pdv, WDT_RESOURCE_REGS,
|
||||||
|
IORESOURCE_MEM),
|
||||||
|
* const ri = wdt_gpi_get_resource(pdv, WDT_RESOURCE_IRQ,
|
||||||
|
IORESOURCE_IRQ),
|
||||||
|
* const rc = wdt_gpi_get_resource(pdv, WDT_RESOURCE_COUNTER,
|
||||||
|
0);
|
||||||
|
|
||||||
|
if (unlikely(!rr || !ri || !rc))
|
||||||
|
return -ENXIO;
|
||||||
|
|
||||||
|
wd_regs = ioremap_nocache(rr->start, rr->end + 1 - rr->start);
|
||||||
|
if (unlikely(!wd_regs))
|
||||||
|
return -ENOMEM;
|
||||||
|
wd_irq = ri->start;
|
||||||
|
wd_ctr = rc->start;
|
||||||
|
res = misc_register(&miscdev);
|
||||||
|
if (res)
|
||||||
|
iounmap(wd_regs);
|
||||||
|
else
|
||||||
|
register_reboot_notifier(&wdt_gpi_shutdown);
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int __exit wdt_gpi_remove(struct device *dev)
|
||||||
|
{
|
||||||
|
int res;
|
||||||
|
|
||||||
|
unregister_reboot_notifier(&wdt_gpi_shutdown);
|
||||||
|
res = misc_deregister(&miscdev);
|
||||||
|
iounmap(wd_regs);
|
||||||
|
wd_regs = NULL;
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* Device driver init & exit */
|
||||||
|
static struct device_driver wdt_gpi_driver = {
|
||||||
|
.name = (char *) wdt_gpi_name,
|
||||||
|
.bus = &platform_bus_type,
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.probe = wdt_gpi_probe,
|
||||||
|
.remove = __exit_p(wdt_gpi_remove),
|
||||||
|
.shutdown = NULL,
|
||||||
|
.suspend = NULL,
|
||||||
|
.resume = NULL,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int __init wdt_gpi_init_module(void)
|
||||||
|
{
|
||||||
|
atomic_set(&opencnt, 1);
|
||||||
|
if (timeout > MAX_TIMEOUT_SECONDS)
|
||||||
|
timeout = MAX_TIMEOUT_SECONDS;
|
||||||
|
return driver_register(&wdt_gpi_driver);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit wdt_gpi_cleanup_module(void)
|
||||||
|
{
|
||||||
|
driver_unregister(&wdt_gpi_driver);
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(wdt_gpi_init_module);
|
||||||
|
module_exit(wdt_gpi_cleanup_module);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Thomas Koeller <thomas.koeller@baslerweb.com>");
|
||||||
|
MODULE_DESCRIPTION("Basler eXcite watchdog driver for gpi devices");
|
||||||
|
MODULE_VERSION("0.1");
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
|
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||||
|
|
||||||
Loading…
Reference in New Issue