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path: root/drivers/watchdog/iTCO_wdt.c
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Diffstat (limited to 'drivers/watchdog/iTCO_wdt.c')
-rw-r--r--drivers/watchdog/iTCO_wdt.c35
1 files changed, 14 insertions, 21 deletions
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index 5b395a4ddfdf..352334947ea3 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -1,7 +1,7 @@
1/* 1/*
2 * intel TCO Watchdog Driver (Used in i82801 and i6300ESB chipsets) 2 * intel TCO Watchdog Driver (Used in i82801 and i63xxESB chipsets)
3 * 3 *
4 * (c) Copyright 2006-2008 Wim Van Sebroeck <wim@iguana.be>. 4 * (c) Copyright 2006-2009 Wim Van Sebroeck <wim@iguana.be>.
5 * 5 *
6 * This program is free software; you can redistribute it and/or 6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License 7 * modify it under the terms of the GNU General Public License
@@ -63,7 +63,7 @@
63 63
64/* Module and version information */ 64/* Module and version information */
65#define DRV_NAME "iTCO_wdt" 65#define DRV_NAME "iTCO_wdt"
66#define DRV_VERSION "1.04" 66#define DRV_VERSION "1.05"
67#define PFX DRV_NAME ": " 67#define PFX DRV_NAME ": "
68 68
69/* Includes */ 69/* Includes */
@@ -236,16 +236,16 @@ MODULE_DEVICE_TABLE(pci, iTCO_wdt_pci_tbl);
236 236
237/* Address definitions for the TCO */ 237/* Address definitions for the TCO */
238/* TCO base address */ 238/* TCO base address */
239#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60 239#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60
240/* SMI Control and Enable Register */ 240/* SMI Control and Enable Register */
241#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30 241#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30
242 242
243#define TCO_RLD TCOBASE + 0x00 /* TCO Timer Reload and Curr. Value */ 243#define TCO_RLD TCOBASE + 0x00 /* TCO Timer Reload and Curr. Value */
244#define TCOv1_TMR TCOBASE + 0x01 /* TCOv1 Timer Initial Value */ 244#define TCOv1_TMR TCOBASE + 0x01 /* TCOv1 Timer Initial Value */
245#define TCO_DAT_IN TCOBASE + 0x02 /* TCO Data In Register */ 245#define TCO_DAT_IN TCOBASE + 0x02 /* TCO Data In Register */
246#define TCO_DAT_OUT TCOBASE + 0x03 /* TCO Data Out Register */ 246#define TCO_DAT_OUT TCOBASE + 0x03 /* TCO Data Out Register */
247#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */ 247#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
248#define TCO2_STS TCOBASE + 0x06 /* TCO2 Status Register */ 248#define TCO2_STS TCOBASE + 0x06 /* TCO2 Status Register */
249#define TCO1_CNT TCOBASE + 0x08 /* TCO1 Control Register */ 249#define TCO1_CNT TCOBASE + 0x08 /* TCO1 Control Register */
250#define TCO2_CNT TCOBASE + 0x0a /* TCO2 Control Register */ 250#define TCO2_CNT TCOBASE + 0x0a /* TCO2 Control Register */
251#define TCOv2_TMR TCOBASE + 0x12 /* TCOv2 Timer Initial Value */ 251#define TCOv2_TMR TCOBASE + 0x12 /* TCOv2 Timer Initial Value */
@@ -338,7 +338,6 @@ static int iTCO_wdt_unset_NO_REBOOT_bit(void)
338static int iTCO_wdt_start(void) 338static int iTCO_wdt_start(void)
339{ 339{
340 unsigned int val; 340 unsigned int val;
341 unsigned long val32;
342 341
343 spin_lock(&iTCO_wdt_private.io_lock); 342 spin_lock(&iTCO_wdt_private.io_lock);
344 343
@@ -351,11 +350,6 @@ static int iTCO_wdt_start(void)
351 return -EIO; 350 return -EIO;
352 } 351 }
353 352
354 /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
355 val32 = inl(SMI_EN);
356 val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
357 outl(val32, SMI_EN);
358
359 /* Force the timer to its reload value by writing to the TCO_RLD 353 /* Force the timer to its reload value by writing to the TCO_RLD
360 register */ 354 register */
361 if (iTCO_wdt_private.iTCO_version == 2) 355 if (iTCO_wdt_private.iTCO_version == 2)
@@ -378,7 +372,6 @@ static int iTCO_wdt_start(void)
378static int iTCO_wdt_stop(void) 372static int iTCO_wdt_stop(void)
379{ 373{
380 unsigned int val; 374 unsigned int val;
381 unsigned long val32;
382 375
383 spin_lock(&iTCO_wdt_private.io_lock); 376 spin_lock(&iTCO_wdt_private.io_lock);
384 377
@@ -390,11 +383,6 @@ static int iTCO_wdt_stop(void)
390 outw(val, TCO1_CNT); 383 outw(val, TCO1_CNT);
391 val = inw(TCO1_CNT); 384 val = inw(TCO1_CNT);
392 385
393 /* Bit 13: TCO_EN -> 1 = Enables the TCO logic to generate SMI# */
394 val32 = inl(SMI_EN);
395 val32 |= 0x00002000;
396 outl(val32, SMI_EN);
397
398 /* Set the NO_REBOOT bit to prevent later reboots, just for sure */ 386 /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
399 iTCO_wdt_set_NO_REBOOT_bit(); 387 iTCO_wdt_set_NO_REBOOT_bit();
400 388
@@ -649,6 +637,7 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
649 int ret; 637 int ret;
650 u32 base_address; 638 u32 base_address;
651 unsigned long RCBA; 639 unsigned long RCBA;
640 unsigned long val32;
652 641
653 /* 642 /*
654 * Find the ACPI/PM base I/O address which is the base 643 * Find the ACPI/PM base I/O address which is the base
@@ -695,6 +684,10 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
695 ret = -EIO; 684 ret = -EIO;
696 goto out; 685 goto out;
697 } 686 }
687 /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
688 val32 = inl(SMI_EN);
689 val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
690 outl(val32, SMI_EN);
698 691
699 /* The TCO I/O registers reside in a 32-byte range pointed to 692 /* The TCO I/O registers reside in a 32-byte range pointed to
700 by the TCOBASE value */ 693 by the TCOBASE value */