1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * sp5100_tco: TCO timer driver for sp5100 chipsets. 4 * 5 * (c) Copyright 2009 Google Inc., All Rights Reserved. 6 * 7 * TCO timer driver for sp5100 chipsets 8 */ 9 10 #include <linux/bitops.h> 11 12 /* 13 * Some address definitions for the Watchdog 14 */ 15 #define SP5100_WDT_MEM_MAP_SIZE 0x08 16 #define SP5100_WDT_CONTROL(base) ((base) + 0x00) /* Watchdog Control */ 17 #define SP5100_WDT_COUNT(base) ((base) + 0x04) /* Watchdog Count */ 18 19 #define SP5100_WDT_START_STOP_BIT BIT(0) 20 #define SP5100_WDT_FIRED BIT(1) 21 #define SP5100_WDT_ACTION_RESET BIT(2) 22 #define SP5100_WDT_DISABLED BIT(3) 23 #define SP5100_WDT_TRIGGER_BIT BIT(7) 24 25 #define SP5100_PM_IOPORTS_SIZE 0x02 26 27 /* 28 * These two IO registers are hardcoded and there doesn't seem to be a way to 29 * read them from a register. 30 */ 31 32 /* For SP5100/SB7x0/SB8x0 chipset */ 33 #define SP5100_IO_PM_INDEX_REG 0xCD6 34 #define SP5100_IO_PM_DATA_REG 0xCD7 35 36 /* For SP5100/SB7x0 chipset */ 37 #define SP5100_SB_RESOURCE_MMIO_BASE 0x9C 38 39 #define SP5100_PM_WATCHDOG_CONTROL 0x69 40 #define SP5100_PM_WATCHDOG_BASE 0x6C 41 42 #define SP5100_PCI_WATCHDOG_MISC_REG 0x41 43 #define SP5100_PCI_WATCHDOG_DECODE_EN BIT(3) 44 45 #define SP5100_PM_WATCHDOG_DISABLE ((u8)BIT(0)) 46 #define SP5100_PM_WATCHDOG_SECOND_RES GENMASK(2, 1) 47 48 #define SP5100_DEVNAME "SP5100 TCO" 49 50 /* For SB8x0(or later) chipset */ 51 #define SB800_PM_ACPI_MMIO_EN 0x24 52 #define SB800_PM_WATCHDOG_CONTROL 0x48 53 #define SB800_PM_WATCHDOG_BASE 0x48 54 #define SB800_PM_WATCHDOG_CONFIG 0x4C 55 56 #define SB800_PCI_WATCHDOG_DECODE_EN BIT(0) 57 #define SB800_PM_WATCHDOG_DISABLE ((u8)BIT(1)) 58 #define SB800_PM_WATCHDOG_SECOND_RES GENMASK(1, 0) 59 #define SB800_ACPI_MMIO_DECODE_EN BIT(0) 60 #define SB800_ACPI_MMIO_SEL BIT(1) 61 62 #define SB800_PM_WDT_MMIO_OFFSET 0xB00 63 64 #define SB800_DEVNAME "SB800 TCO" 65 66 /* For recent chips with embedded FCH (rev 40+) */ 67 68 #define EFCH_PM_DECODEEN 0x00 69 70 #define EFCH_PM_DECODEEN_WDT_TMREN BIT(7) 71 72 73 #define EFCH_PM_DECODEEN3 0x03 74 #define EFCH_PM_DECODEEN_SECOND_RES GENMASK(1, 0) 75 #define EFCH_PM_WATCHDOG_DISABLE ((u8)GENMASK(3, 2)) 76 77 /* WDT MMIO if enabled with PM00_DECODEEN_WDT_TMREN */ 78 #define EFCH_PM_WDT_ADDR 0xfeb00000 79 80 #define EFCH_PM_ISACONTROL 0x04 81 82 #define EFCH_PM_ISACONTROL_MMIOEN BIT(1) 83 84 #define EFCH_PM_ACPI_MMIO_ADDR 0xfed80000 85 #define EFCH_PM_ACPI_MMIO_WDT_OFFSET 0x00000b00 86