diff options
Diffstat (limited to 'drivers/char/watchdog/iTCO_vendor_support.c')
| -rw-r--r-- | drivers/char/watchdog/iTCO_vendor_support.c | 307 |
1 files changed, 0 insertions, 307 deletions
diff --git a/drivers/char/watchdog/iTCO_vendor_support.c b/drivers/char/watchdog/iTCO_vendor_support.c deleted file mode 100644 index 41508399009..00000000000 --- a/drivers/char/watchdog/iTCO_vendor_support.c +++ /dev/null @@ -1,307 +0,0 @@ -/* - * intel TCO vendor specific watchdog driver support - * - * (c) Copyright 2006 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, ... - */ - -/* Module and version information */ -#define DRV_NAME "iTCO_vendor_support" -#define DRV_VERSION "1.01" -#define DRV_RELDATE "11-Nov-2006" -#define PFX DRV_NAME ": " - -/* 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 <asm/io.h> /* For inb/outb/... */ - -/* iTCO defines */ -#define SMI_EN acpibase + 0x30 /* SMI Control and Enable Register */ -#define TCOBASE acpibase + 0x60 /* TCO base address */ -#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */ - -/* List of vendor support modes */ -#define SUPERMICRO_OLD_BOARD 1 /* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */ -#define SUPERMICRO_NEW_BOARD 2 /* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems */ - -static int vendorsupport = 0; -module_param(vendorsupport, int, 0); -MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default=0 (none), 1=SuperMicro Pent3, 2=SuperMicro Pent4+"); - -/* - * 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(unsigned long acpibase) -{ - unsigned long val32; - - val32 = inl(SMI_EN); - val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */ - outl(val32, SMI_EN); /* Needed to activate watchdog */ -} - -static void supermicro_old_pre_stop(unsigned long acpibase) -{ - unsigned long val32; - - val32 = inl(SMI_EN); - val32 &= 0x00002000; /* Turn on SMI clearing watchdog */ - outl(val32, SMI_EN); /* Needed to deactivate watchdog */ -} - -static void supermicro_old_pre_keepalive(unsigned long acpibase) -{ - /* Reload TCO Timer (done in iTCO_wdt_keepalive) + */ - /* Clear "Expire Flag" (Bit 3 of TC01_STS register) */ - outb(0x08, TCO1_STS); -} - -/* - * Vendor Support: 2 - * Board: Super Micro Computer Inc. P4SBx, P4DPx - * iTCO chipset: ICH4 - * - * Code contributed by: R. Seretny <lkpatches@paypc.com> - * Documentation obtained by R. Seretny from SuperMicro Technical Support - * - * To enable Watchdog function: - * 1. BIOS - * For P4SBx: - * BIOS setup -> Advanced -> Integrated Peripherals -> Watch Dog Feature - * For P4DPx: - * BIOS setup -> Advanced -> I/O Device Configuration -> Watch Dog - * This setting enables or disables Watchdog function. When enabled, the - * default watchdog timer is set to be 5 minutes (about 4’35”). It is - * enough to load and run the OS. The application (service or driver) has - * to take over the control once OS is running up and before watchdog - * expires. - * - * 2. JUMPER - * For P4SBx: JP39 - * For P4DPx: JP37 - * This jumper is used for safety. Closed is enabled. This jumper - * prevents user enables watchdog in BIOS by accident. - * - * To enable Watch Dog function, both BIOS and JUMPER must be enabled. - * - * The documentation lists motherboards P4SBx and P4DPx series as of - * 20-March-2002. However, this code works flawlessly with much newer - * motherboards, such as my X6DHR-8G2 (SuperServer 6014H-82). - * - * The original iTCO driver as written does not actually reset the - * watchdog timer on these machines, as a result they reboot after five - * minutes. - * - * NOTE: You may leave the Watchdog function disabled in the SuperMicro - * 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. - */ - -/* I/O Port's */ -#define SM_REGINDEX 0x2e /* SuperMicro ICH4+ Register Index */ -#define SM_DATAIO 0x2f /* SuperMicro ICH4+ Register Data I/O */ - -/* Control Register's */ -#define SM_CTLPAGESW 0x07 /* SuperMicro ICH4+ Control Page Switch */ -#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"); - |