forked from Minki/linux
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
This commit is contained in:
Linus Torvalds
commit
a4e71e7937
@ -40,13 +40,12 @@
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#include "sp5100_tco.h"
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/* Module and version information */
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#define TCO_VERSION "0.03"
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#define TCO_VERSION "0.05"
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#define TCO_MODULE_NAME "SP5100 TCO timer"
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#define TCO_DRIVER_NAME TCO_MODULE_NAME ", v" TCO_VERSION
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/* internal variables */
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static u32 tcobase_phys;
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static u32 resbase_phys;
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static u32 tco_wdt_fired;
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static void __iomem *tcobase;
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static unsigned int pm_iobase;
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@ -54,10 +53,6 @@ static DEFINE_SPINLOCK(tco_lock); /* Guards the hardware */
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static unsigned long timer_alive;
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static char tco_expect_close;
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static struct pci_dev *sp5100_tco_pci;
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static struct resource wdt_res = {
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.name = "Watchdog Timer",
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.flags = IORESOURCE_MEM,
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};
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/* the watchdog platform device */
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static struct platform_device *sp5100_tco_platform_device;
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@ -75,12 +70,6 @@ module_param(nowayout, bool, 0);
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MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started."
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" (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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static unsigned int force_addr;
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module_param(force_addr, uint, 0);
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MODULE_PARM_DESC(force_addr, "Force the use of specified MMIO address."
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" ONLY USE THIS PARAMETER IF YOU REALLY KNOW"
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" WHAT YOU ARE DOING (default=none)");
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/*
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* Some TCO specific functions
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*/
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@ -176,39 +165,6 @@ static void tco_timer_enable(void)
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}
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}
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static void tco_timer_disable(void)
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{
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int val;
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if (sp5100_tco_pci->revision >= 0x40) {
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/* For SB800 or later */
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/* Enable watchdog decode bit and Disable watchdog timer */
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outb(SB800_PM_WATCHDOG_CONTROL, SB800_IO_PM_INDEX_REG);
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val = inb(SB800_IO_PM_DATA_REG);
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val |= SB800_PCI_WATCHDOG_DECODE_EN;
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val |= SB800_PM_WATCHDOG_DISABLE;
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outb(val, SB800_IO_PM_DATA_REG);
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} else {
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/* For SP5100 or SB7x0 */
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/* Enable watchdog decode bit */
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pci_read_config_dword(sp5100_tco_pci,
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SP5100_PCI_WATCHDOG_MISC_REG,
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&val);
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val |= SP5100_PCI_WATCHDOG_DECODE_EN;
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pci_write_config_dword(sp5100_tco_pci,
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SP5100_PCI_WATCHDOG_MISC_REG,
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val);
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/* Disable Watchdog timer */
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outb(SP5100_PM_WATCHDOG_CONTROL, SP5100_IO_PM_INDEX_REG);
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val = inb(SP5100_IO_PM_DATA_REG);
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val |= SP5100_PM_WATCHDOG_DISABLE;
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outb(val, SP5100_IO_PM_DATA_REG);
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}
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}
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/*
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* /dev/watchdog handling
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*/
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@ -361,7 +317,7 @@ static unsigned char sp5100_tco_setupdevice(void)
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{
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struct pci_dev *dev = NULL;
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const char *dev_name = NULL;
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u32 val, tmp_val;
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u32 val;
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u32 index_reg, data_reg, base_addr;
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/* Match the PCI device */
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@ -459,63 +415,8 @@ static unsigned char sp5100_tco_setupdevice(void)
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} else
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pr_debug("SBResource_MMIO is disabled(0x%04x)\n", val);
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/*
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* Lastly re-programming the watchdog timer MMIO address,
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* This method is a last resort...
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*
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* Before re-programming, to ensure that the watchdog timer
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* is disabled, disable the watchdog timer.
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*/
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tco_timer_disable();
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if (force_addr) {
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/*
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* Force the use of watchdog timer MMIO address, and aligned to
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* 8byte boundary.
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*/
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force_addr &= ~0x7;
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val = force_addr;
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pr_info("Force the use of 0x%04x as MMIO address\n", val);
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} else {
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/*
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* Get empty slot into the resource tree for watchdog timer.
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*/
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if (allocate_resource(&iomem_resource,
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&wdt_res,
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SP5100_WDT_MEM_MAP_SIZE,
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0xf0000000,
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0xfffffff8,
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0x8,
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NULL,
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NULL)) {
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pr_err("MMIO allocation failed\n");
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goto unreg_region;
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}
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val = resbase_phys = wdt_res.start;
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pr_debug("Got 0x%04x from resource tree\n", val);
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}
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/* Restore to the low three bits */
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outb(base_addr+0, index_reg);
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tmp_val = val | (inb(data_reg) & 0x7);
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/* Re-programming the watchdog timer base address */
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outb(base_addr+0, index_reg);
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outb((tmp_val >> 0) & 0xff, data_reg);
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outb(base_addr+1, index_reg);
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outb((tmp_val >> 8) & 0xff, data_reg);
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outb(base_addr+2, index_reg);
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outb((tmp_val >> 16) & 0xff, data_reg);
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outb(base_addr+3, index_reg);
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outb((tmp_val >> 24) & 0xff, data_reg);
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if (!request_mem_region_exclusive(val, SP5100_WDT_MEM_MAP_SIZE,
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dev_name)) {
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pr_err("MMIO address 0x%04x already in use\n", val);
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goto unreg_resource;
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}
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pr_notice("failed to find MMIO address, giving up.\n");
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goto unreg_region;
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setup_wdt:
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tcobase_phys = val;
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@ -555,9 +456,6 @@ setup_wdt:
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unreg_mem_region:
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release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE);
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unreg_resource:
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if (resbase_phys)
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release_resource(&wdt_res);
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unreg_region:
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release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE);
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exit:
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@ -567,7 +465,6 @@ exit:
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static int sp5100_tco_init(struct platform_device *dev)
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{
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int ret;
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char addr_str[16];
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/*
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* Check whether or not the hardware watchdog is there. If found, then
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@ -599,23 +496,14 @@ static int sp5100_tco_init(struct platform_device *dev)
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clear_bit(0, &timer_alive);
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/* Show module parameters */
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if (force_addr == tcobase_phys)
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/* The force_addr is vaild */
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sprintf(addr_str, "0x%04x", force_addr);
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else
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strcpy(addr_str, "none");
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pr_info("initialized (0x%p). heartbeat=%d sec (nowayout=%d, "
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"force_addr=%s)\n",
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tcobase, heartbeat, nowayout, addr_str);
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pr_info("initialized (0x%p). heartbeat=%d sec (nowayout=%d)\n",
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tcobase, heartbeat, nowayout);
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return 0;
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exit:
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iounmap(tcobase);
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release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE);
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if (resbase_phys)
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release_resource(&wdt_res);
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release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE);
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return ret;
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}
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@ -630,8 +518,6 @@ static void sp5100_tco_cleanup(void)
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misc_deregister(&sp5100_tco_miscdev);
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iounmap(tcobase);
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release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE);
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if (resbase_phys)
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release_resource(&wdt_res);
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release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE);
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}
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@ -57,7 +57,7 @@
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#define SB800_PM_WATCHDOG_DISABLE (1 << 2)
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#define SB800_PM_WATCHDOG_SECOND_RES (3 << 0)
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#define SB800_ACPI_MMIO_DECODE_EN (1 << 0)
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#define SB800_ACPI_MMIO_SEL (1 << 2)
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#define SB800_ACPI_MMIO_SEL (1 << 1)
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#define SB800_PM_WDT_MMIO_OFFSET 0xB00
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