mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 08:02:07 +00:00
5a623ce0a5
As the only user of iTCO_vendor_pre_keepalive and iTCO_vendor_pre_set_heartbeat has just been removed, we can delete these 2 hooks. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Martin Wilck <mwilck@suse.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
220 lines
6.5 KiB
C
220 lines
6.5 KiB
C
/*
|
|
* intel TCO vendor specific watchdog driver support
|
|
*
|
|
* (c) Copyright 2006-2009 Wim Van Sebroeck <wim@iguana.be>.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
* Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
|
|
* provide warranty for any of this software. This material is
|
|
* provided "AS-IS" and at no charge.
|
|
*/
|
|
|
|
/*
|
|
* Includes, defines, variables, module parameters, ...
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
/* Module and version information */
|
|
#define DRV_NAME "iTCO_vendor_support"
|
|
#define DRV_VERSION "1.04"
|
|
|
|
/* Includes */
|
|
#include <linux/module.h> /* For module specific items */
|
|
#include <linux/moduleparam.h> /* For new moduleparam's */
|
|
#include <linux/types.h> /* For standard types (like size_t) */
|
|
#include <linux/errno.h> /* For the -ENODEV/... values */
|
|
#include <linux/kernel.h> /* For printk/panic/... */
|
|
#include <linux/init.h> /* For __init/__exit/... */
|
|
#include <linux/ioport.h> /* For io-port access */
|
|
#include <linux/io.h> /* For inb/outb/... */
|
|
|
|
#include "iTCO_vendor.h"
|
|
|
|
/* List of vendor support modes */
|
|
/* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */
|
|
#define SUPERMICRO_OLD_BOARD 1
|
|
/* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems - no longer supported */
|
|
#define SUPERMICRO_NEW_BOARD 2
|
|
/* Broken BIOS */
|
|
#define BROKEN_BIOS 911
|
|
|
|
static int vendorsupport;
|
|
module_param(vendorsupport, int, 0);
|
|
MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default="
|
|
"0 (none), 1=SuperMicro Pent3, 911=Broken SMI BIOS");
|
|
|
|
/*
|
|
* Vendor Specific Support
|
|
*/
|
|
|
|
/*
|
|
* Vendor Support: 1
|
|
* Board: Super Micro Computer Inc. 370SSE+-OEM1/P3TSSE
|
|
* iTCO chipset: ICH2
|
|
*
|
|
* Code contributed by: R. Seretny <lkpatches@paypc.com>
|
|
* Documentation obtained by R. Seretny from SuperMicro Technical Support
|
|
*
|
|
* To enable Watchdog function:
|
|
* BIOS setup -> Power -> TCO Logic SMI Enable -> Within5Minutes
|
|
* This setting enables SMI to clear the watchdog expired flag.
|
|
* If BIOS or CPU fail which may cause SMI hang, then system will
|
|
* reboot. When application starts to use watchdog function,
|
|
* application has to take over the control from SMI.
|
|
*
|
|
* For P3TSSE, J36 jumper needs to be removed to enable the Watchdog
|
|
* function.
|
|
*
|
|
* Note: The system will reboot when Expire Flag is set TWICE.
|
|
* So, if the watchdog timer is 20 seconds, then the maximum hang
|
|
* time is about 40 seconds, and the minimum hang time is about
|
|
* 20.6 seconds.
|
|
*/
|
|
|
|
static void supermicro_old_pre_start(struct resource *smires)
|
|
{
|
|
unsigned long val32;
|
|
|
|
/* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
|
|
val32 = inl(smires->start);
|
|
val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
|
|
outl(val32, smires->start); /* Needed to activate watchdog */
|
|
}
|
|
|
|
static void supermicro_old_pre_stop(struct resource *smires)
|
|
{
|
|
unsigned long val32;
|
|
|
|
/* Bit 13: TCO_EN -> 1 = Enables the TCO logic to generate SMI# */
|
|
val32 = inl(smires->start);
|
|
val32 |= 0x00002000; /* Turn on SMI clearing watchdog */
|
|
outl(val32, smires->start); /* Needed to deactivate watchdog */
|
|
}
|
|
|
|
/*
|
|
* Vendor Support: 911
|
|
* Board: Some Intel ICHx based motherboards
|
|
* iTCO chipset: ICH7+
|
|
*
|
|
* Some Intel motherboards have a broken BIOS implementation: i.e.
|
|
* the SMI handler clear's the TIMEOUT bit in the TC01_STS register
|
|
* and does not reload the time. Thus the TCO watchdog does not reboot
|
|
* the system.
|
|
*
|
|
* These are the conclusions of Andriy Gapon <avg@icyb.net.ua> after
|
|
* debugging: the SMI handler is quite simple - it tests value in
|
|
* TCO1_CNT against 0x800, i.e. checks TCO_TMR_HLT. If the bit is set
|
|
* the handler goes into an infinite loop, apparently to allow the
|
|
* second timeout and reboot. Otherwise it simply clears TIMEOUT bit
|
|
* in TCO1_STS and that's it.
|
|
* So the logic seems to be reversed, because it is hard to see how
|
|
* TIMEOUT can get set to 1 and SMI generated when TCO_TMR_HLT is set
|
|
* (other than a transitional effect).
|
|
*
|
|
* The only fix found to get the motherboard(s) to reboot is to put
|
|
* the glb_smi_en bit to 0. This is a dirty hack that bypasses the
|
|
* broken code by disabling Global SMI.
|
|
*
|
|
* WARNING: globally disabling SMI could possibly lead to dramatic
|
|
* problems, especially on laptops! I.e. various ACPI things where
|
|
* SMI is used for communication between OS and firmware.
|
|
*
|
|
* Don't use this fix if you don't need to!!!
|
|
*/
|
|
|
|
static void broken_bios_start(struct resource *smires)
|
|
{
|
|
unsigned long val32;
|
|
|
|
val32 = inl(smires->start);
|
|
/* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI#
|
|
Bit 0: GBL_SMI_EN -> 0 = No SMI# will be generated by ICH. */
|
|
val32 &= 0xffffdffe;
|
|
outl(val32, smires->start);
|
|
}
|
|
|
|
static void broken_bios_stop(struct resource *smires)
|
|
{
|
|
unsigned long val32;
|
|
|
|
val32 = inl(smires->start);
|
|
/* Bit 13: TCO_EN -> 1 = Enables TCO logic generating an SMI#
|
|
Bit 0: GBL_SMI_EN -> 1 = Turn global SMI on again. */
|
|
val32 |= 0x00002001;
|
|
outl(val32, smires->start);
|
|
}
|
|
|
|
/*
|
|
* Generic Support Functions
|
|
*/
|
|
|
|
void iTCO_vendor_pre_start(struct resource *smires,
|
|
unsigned int heartbeat)
|
|
{
|
|
switch (vendorsupport) {
|
|
case SUPERMICRO_OLD_BOARD:
|
|
supermicro_old_pre_start(smires);
|
|
break;
|
|
case BROKEN_BIOS:
|
|
broken_bios_start(smires);
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(iTCO_vendor_pre_start);
|
|
|
|
void iTCO_vendor_pre_stop(struct resource *smires)
|
|
{
|
|
switch (vendorsupport) {
|
|
case SUPERMICRO_OLD_BOARD:
|
|
supermicro_old_pre_stop(smires);
|
|
break;
|
|
case BROKEN_BIOS:
|
|
broken_bios_stop(smires);
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(iTCO_vendor_pre_stop);
|
|
|
|
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)
|
|
{
|
|
if (vendorsupport == SUPERMICRO_NEW_BOARD) {
|
|
pr_warn("Option vendorsupport=%d is no longer supported, "
|
|
"please use the w83627hf_wdt driver instead\n",
|
|
SUPERMICRO_NEW_BOARD);
|
|
return -EINVAL;
|
|
}
|
|
pr_info("vendor-support=%d\n", vendorsupport);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit iTCO_vendor_exit_module(void)
|
|
{
|
|
pr_info("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");
|
|
|