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826270373f
The driver currently uses a CPU family match of 17h to determine EFCH_PM_DECODEEN_WDT_TMREN register support. This family check will not support future AMD CPUs and instead will require driver updates to add support. Remove the family 17h family check and add a check for SMBus PCI revision ID 0x51 or greater. The MMIO access method has been available since at least SMBus controllers using PCI revision 0x51. This revision check will support family 17h and future AMD processors including EFCH functionality without requiring driver changes. Co-developed-by: Robert Richter <rrichter@amd.com> Signed-off-by: Robert Richter <rrichter@amd.com> Signed-off-by: Terry Bowman <terry.bowman@amd.com> Tested-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20220202153525.1693378-5-terry.bowman@amd.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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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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#include <linux/bitops.h>
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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 BIT(0)
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#define SP5100_WDT_FIRED BIT(1)
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#define SP5100_WDT_ACTION_RESET BIT(2)
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#define SP5100_WDT_DISABLED BIT(3)
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#define SP5100_WDT_TRIGGER_BIT BIT(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/SB8x0 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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/* For SP5100/SB7x0 chipset */
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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_PCI_WATCHDOG_MISC_REG 0x41
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#define SP5100_PCI_WATCHDOG_DECODE_EN BIT(3)
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#define SP5100_PM_WATCHDOG_DISABLE ((u8)BIT(0))
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#define SP5100_PM_WATCHDOG_SECOND_RES GENMASK(2, 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_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 BIT(0)
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#define SB800_PM_WATCHDOG_DISABLE ((u8)BIT(1))
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#define SB800_PM_WATCHDOG_SECOND_RES GENMASK(1, 0)
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#define SB800_ACPI_MMIO_DECODE_EN BIT(0)
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#define SB800_ACPI_MMIO_SEL BIT(1)
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#define SB800_ACPI_MMIO_MASK GENMASK(1, 0)
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#define SB800_PM_WDT_MMIO_OFFSET 0xB00
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#define SB800_DEVNAME "SB800 TCO"
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/* For recent chips with embedded FCH (rev 40+) */
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#define EFCH_PM_DECODEEN 0x00
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#define EFCH_PM_DECODEEN_WDT_TMREN BIT(7)
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#define EFCH_PM_DECODEEN3 0x03
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#define EFCH_PM_DECODEEN_SECOND_RES GENMASK(1, 0)
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#define EFCH_PM_WATCHDOG_DISABLE ((u8)GENMASK(3, 2))
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/* WDT MMIO if enabled with PM00_DECODEEN_WDT_TMREN */
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#define EFCH_PM_WDT_ADDR 0xfeb00000
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#define EFCH_PM_ISACONTROL 0x04
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#define EFCH_PM_ISACONTROL_MMIOEN BIT(1)
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#define EFCH_PM_ACPI_MMIO_ADDR 0xfed80000
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#define EFCH_PM_ACPI_MMIO_PM_OFFSET 0x00000300
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#define EFCH_PM_ACPI_MMIO_WDT_OFFSET 0x00000b00
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#define EFCH_PM_ACPI_MMIO_PM_ADDR (EFCH_PM_ACPI_MMIO_ADDR + \
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EFCH_PM_ACPI_MMIO_PM_OFFSET)
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#define EFCH_PM_ACPI_MMIO_PM_SIZE 8
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#define AMD_ZEN_SMBUS_PCI_REV 0x51
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