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authorLinus Torvalds <torvalds@linux-foundation.org>2013-03-23 12:30:39 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-03-23 12:30:39 -0700
commita4e71e7937461730998cef56cc924fe731b4d345 (patch)
tree0f572150495eddce59a83035cf6f73448a0302be
parentc19b3b0f6eed552952845e4ad908dba2113d67b4 (diff)
parent81fc933f176cd95f757bfc8a98109ef422598b79 (diff)
downloadconfigs-a4e71e7937461730998cef56cc924fe731b4d345.tar.gz
Merge git://www.linux-watchdog.org/linux-watchdog
Pull watchdog fixes from Wim Van Sebroeck: "Fix a boot issues and correct the AcpiMmioSel bitmask in the sp5100_tco watchdog device driver" * git://www.linux-watchdog.org/linux-watchdog: watchdog: sp5100_tco: Set the AcpiMmioSel bitmask value to 1 instead of 2 watchdog: sp5100_tco: Remove code that may cause a boot failure
-rw-r--r--drivers/watchdog/sp5100_tco.c126
-rw-r--r--drivers/watchdog/sp5100_tco.h2
2 files changed, 7 insertions, 121 deletions
diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
index e3b8f757d2d..0e9d8c479c3 100644
--- a/drivers/watchdog/sp5100_tco.c
+++ b/drivers/watchdog/sp5100_tco.c
@@ -40,13 +40,12 @@
#include "sp5100_tco.h"
/* Module and version information */
-#define TCO_VERSION "0.03"
+#define TCO_VERSION "0.05"
#define TCO_MODULE_NAME "SP5100 TCO timer"
#define TCO_DRIVER_NAME TCO_MODULE_NAME ", v" TCO_VERSION
/* internal variables */
static u32 tcobase_phys;
-static u32 resbase_phys;
static u32 tco_wdt_fired;
static void __iomem *tcobase;
static unsigned int pm_iobase;
@@ -54,10 +53,6 @@ static DEFINE_SPINLOCK(tco_lock); /* Guards the hardware */
static unsigned long timer_alive;
static char tco_expect_close;
static struct pci_dev *sp5100_tco_pci;
-static struct resource wdt_res = {
- .name = "Watchdog Timer",
- .flags = IORESOURCE_MEM,
-};
/* the watchdog platform device */
static struct platform_device *sp5100_tco_platform_device;
@@ -75,12 +70,6 @@ module_param(nowayout, bool, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started."
" (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-static unsigned int force_addr;
-module_param(force_addr, uint, 0);
-MODULE_PARM_DESC(force_addr, "Force the use of specified MMIO address."
- " ONLY USE THIS PARAMETER IF YOU REALLY KNOW"
- " WHAT YOU ARE DOING (default=none)");
-
/*
* Some TCO specific functions
*/
@@ -176,39 +165,6 @@ static void tco_timer_enable(void)
}
}
-static void tco_timer_disable(void)
-{
- int val;
-
- if (sp5100_tco_pci->revision >= 0x40) {
- /* For SB800 or later */
- /* Enable watchdog decode bit and Disable watchdog timer */
- outb(SB800_PM_WATCHDOG_CONTROL, SB800_IO_PM_INDEX_REG);
- val = inb(SB800_IO_PM_DATA_REG);
- val |= SB800_PCI_WATCHDOG_DECODE_EN;
- val |= SB800_PM_WATCHDOG_DISABLE;
- outb(val, SB800_IO_PM_DATA_REG);
- } else {
- /* For SP5100 or SB7x0 */
- /* Enable watchdog decode bit */
- pci_read_config_dword(sp5100_tco_pci,
- SP5100_PCI_WATCHDOG_MISC_REG,
- &val);
-
- val |= SP5100_PCI_WATCHDOG_DECODE_EN;
-
- pci_write_config_dword(sp5100_tco_pci,
- SP5100_PCI_WATCHDOG_MISC_REG,
- val);
-
- /* Disable Watchdog timer */
- outb(SP5100_PM_WATCHDOG_CONTROL, SP5100_IO_PM_INDEX_REG);
- val = inb(SP5100_IO_PM_DATA_REG);
- val |= SP5100_PM_WATCHDOG_DISABLE;
- outb(val, SP5100_IO_PM_DATA_REG);
- }
-}
-
/*
* /dev/watchdog handling
*/
@@ -361,7 +317,7 @@ static unsigned char sp5100_tco_setupdevice(void)
{
struct pci_dev *dev = NULL;
const char *dev_name = NULL;
- u32 val, tmp_val;
+ u32 val;
u32 index_reg, data_reg, base_addr;
/* Match the PCI device */
@@ -459,63 +415,8 @@ static unsigned char sp5100_tco_setupdevice(void)
} else
pr_debug("SBResource_MMIO is disabled(0x%04x)\n", val);
- /*
- * Lastly re-programming the watchdog timer MMIO address,
- * This method is a last resort...
- *
- * Before re-programming, to ensure that the watchdog timer
- * is disabled, disable the watchdog timer.
- */
- tco_timer_disable();
-
- if (force_addr) {
- /*
- * Force the use of watchdog timer MMIO address, and aligned to
- * 8byte boundary.
- */
- force_addr &= ~0x7;
- val = force_addr;
-
- pr_info("Force the use of 0x%04x as MMIO address\n", val);
- } else {
- /*
- * Get empty slot into the resource tree for watchdog timer.
- */
- if (allocate_resource(&iomem_resource,
- &wdt_res,
- SP5100_WDT_MEM_MAP_SIZE,
- 0xf0000000,
- 0xfffffff8,
- 0x8,
- NULL,
- NULL)) {
- pr_err("MMIO allocation failed\n");
- goto unreg_region;
- }
-
- val = resbase_phys = wdt_res.start;
- pr_debug("Got 0x%04x from resource tree\n", val);
- }
-
- /* Restore to the low three bits */
- outb(base_addr+0, index_reg);
- tmp_val = val | (inb(data_reg) & 0x7);
-
- /* Re-programming the watchdog timer base address */
- outb(base_addr+0, index_reg);
- outb((tmp_val >> 0) & 0xff, data_reg);
- outb(base_addr+1, index_reg);
- outb((tmp_val >> 8) & 0xff, data_reg);
- outb(base_addr+2, index_reg);
- outb((tmp_val >> 16) & 0xff, data_reg);
- outb(base_addr+3, index_reg);
- outb((tmp_val >> 24) & 0xff, data_reg);
-
- if (!request_mem_region_exclusive(val, SP5100_WDT_MEM_MAP_SIZE,
- dev_name)) {
- pr_err("MMIO address 0x%04x already in use\n", val);
- goto unreg_resource;
- }
+ pr_notice("failed to find MMIO address, giving up.\n");
+ goto unreg_region;
setup_wdt:
tcobase_phys = val;
@@ -555,9 +456,6 @@ setup_wdt:
unreg_mem_region:
release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE);
-unreg_resource:
- if (resbase_phys)
- release_resource(&wdt_res);
unreg_region:
release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE);
exit:
@@ -567,7 +465,6 @@ exit:
static int sp5100_tco_init(struct platform_device *dev)
{
int ret;
- char addr_str[16];
/*
* Check whether or not the hardware watchdog is there. If found, then
@@ -599,23 +496,14 @@ static int sp5100_tco_init(struct platform_device *dev)
clear_bit(0, &timer_alive);
/* Show module parameters */
- if (force_addr == tcobase_phys)
- /* The force_addr is vaild */
- sprintf(addr_str, "0x%04x", force_addr);
- else
- strcpy(addr_str, "none");
-
- pr_info("initialized (0x%p). heartbeat=%d sec (nowayout=%d, "
- "force_addr=%s)\n",
- tcobase, heartbeat, nowayout, addr_str);
+ pr_info("initialized (0x%p). heartbeat=%d sec (nowayout=%d)\n",
+ tcobase, heartbeat, nowayout);
return 0;
exit:
iounmap(tcobase);
release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE);
- if (resbase_phys)
- release_resource(&wdt_res);
release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE);
return ret;
}
@@ -630,8 +518,6 @@ static void sp5100_tco_cleanup(void)
misc_deregister(&sp5100_tco_miscdev);
iounmap(tcobase);
release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE);
- if (resbase_phys)
- release_resource(&wdt_res);
release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE);
}
diff --git a/drivers/watchdog/sp5100_tco.h b/drivers/watchdog/sp5100_tco.h
index 71594a0c14b..2b28c00da0d 100644
--- a/drivers/watchdog/sp5100_tco.h
+++ b/drivers/watchdog/sp5100_tco.h
@@ -57,7 +57,7 @@
#define SB800_PM_WATCHDOG_DISABLE (1 << 2)
#define SB800_PM_WATCHDOG_SECOND_RES (3 << 0)
#define SB800_ACPI_MMIO_DECODE_EN (1 << 0)
-#define SB800_ACPI_MMIO_SEL (1 << 2)
+#define SB800_ACPI_MMIO_SEL (1 << 1)
#define SB800_PM_WDT_MMIO_OFFSET 0xB00