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The AcpiMmioSel bit is bit 1 in the AcpiMmioEn register, but the current
sp5100_tco driver is using bit 2.
See 2.3.3 Power Management (PM) Registers page 150 of the
AMD SB800-Series Southbridges Register Reference Guide [1].
AcpiMmioEn - RW – 8/16/32 bits - [PM_Reg: 24h]
Field Name Bits Default Description
AcpiMMioDecodeEn 0 0b Set to 1 to enable AcpiMMio space.
AcpiMMIoSel 1 0b Set AcpiMMio registers to be memory-mapped or IO-mapped space.
0: Memory-mapped space
1: I/O-mapped space
The sp5100_tco driver expects zero as a value of AcpiMmioSel (bit 1).
Fortunately, no problems were caused by this typo, because the default
value of the undocumented misused bit 2 seems to be zero.
However, the sp5100_tco driver should use the correct bitmask value.
[1] http://support.amd.com/us/Embedded_TechDocs/45482.pdf
Signed-off-by: Takahisa Tanaka <mc74hc00@gmail.com>
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@vger.kernel.org>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* sp5100_tco: TCO timer driver for sp5100 chipsets.
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*
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* (c) Copyright 2009 Google Inc., All Rights Reserved.
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*
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* TCO timer driver for sp5100 chipsets
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*/
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/*
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* Some address definitions for the Watchdog
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*/
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#define SP5100_WDT_MEM_MAP_SIZE 0x08
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#define SP5100_WDT_CONTROL(base) ((base) + 0x00) /* Watchdog Control */
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#define SP5100_WDT_COUNT(base) ((base) + 0x04) /* Watchdog Count */
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#define SP5100_WDT_START_STOP_BIT (1 << 0)
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#define SP5100_WDT_TRIGGER_BIT (1 << 7)
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#define SP5100_PM_IOPORTS_SIZE 0x02
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/*
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* These two IO registers are hardcoded and there doesn't seem to be a way to
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* read them from a register.
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*/
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/* For SP5100/SB7x0 chipset */
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#define SP5100_IO_PM_INDEX_REG 0xCD6
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#define SP5100_IO_PM_DATA_REG 0xCD7
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#define SP5100_SB_RESOURCE_MMIO_BASE 0x9C
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#define SP5100_PM_WATCHDOG_CONTROL 0x69
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#define SP5100_PM_WATCHDOG_BASE 0x6C
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#define SP5100_PM_WATCHDOG_FIRED (1 << 1)
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#define SP5100_PM_WATCHDOG_ACTION_RESET (1 << 2)
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#define SP5100_PCI_WATCHDOG_MISC_REG 0x41
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#define SP5100_PCI_WATCHDOG_DECODE_EN (1 << 3)
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#define SP5100_PM_WATCHDOG_DISABLE (1 << 0)
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#define SP5100_PM_WATCHDOG_SECOND_RES (3 << 1)
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#define SP5100_DEVNAME "SP5100 TCO"
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/* For SB8x0(or later) chipset */
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#define SB800_IO_PM_INDEX_REG 0xCD6
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#define SB800_IO_PM_DATA_REG 0xCD7
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#define SB800_PM_ACPI_MMIO_EN 0x24
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#define SB800_PM_WATCHDOG_CONTROL 0x48
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#define SB800_PM_WATCHDOG_BASE 0x48
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#define SB800_PM_WATCHDOG_CONFIG 0x4C
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#define SB800_PCI_WATCHDOG_DECODE_EN (1 << 0)
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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 << 1)
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#define SB800_PM_WDT_MMIO_OFFSET 0xB00
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#define SB800_DEVNAME "SB800 TCO"
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