70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
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/* Copyright 2016 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef __CROS_EC_HPET_H
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#define __CROS_EC_HPET_H
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#include "common.h"
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/* ISH HPET config and timer registers */
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#define TIMER0_CONF_CAP_REG 0x100
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#define TIMER0_COMP_VAL_REG 0x108
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/* HPET_GENERAL_CONFIG settings */
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#define HPET_GENERAL_CONFIG REG32(ISH_HPET_BASE + 0x10)
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#define HPET_ENABLE_CNF BIT(0)
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/* Interrupt status acknowledge register */
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#define HPET_INTR_CLEAR REG32(ISH_HPET_BASE + 0x20)
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/* Main counter register. 64-bit */
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#define HPET_MAIN_COUNTER_64 REG64(ISH_HPET_BASE + 0xF0)
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#define HPET_MAIN_COUNTER_64_LO REG32(ISH_HPET_BASE + 0xF0)
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#define HPET_MAIN_COUNTER_64_HI REG32(ISH_HPET_BASE + 0xF4)
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/* HPET Timer 0/1/2 configuration*/
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#define HPET_TIMER_CONF_CAP(x) REG32(ISH_HPET_BASE + 0x100 + ((x) * 0x20))
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#define HPET_Tn_INT_TYPE_CNF BIT(1)
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#define HPET_Tn_INT_ENB_CNF BIT(2)
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#define HPET_Tn_TYPE_CNF BIT(3)
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#define HPET_Tn_VAL_SET_CNF BIT(6)
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#define HPET_Tn_32MODE_CNF BIT(8)
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#define HPET_Tn_INT_ROUTE_CNF_SHIFT 0x9
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#define HPET_Tn_INT_ROUTE_CNF_MASK (0x1f << 9)
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/*
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* HPET Timer 0/1/2 comparator values. 1/2 are always 32-bit. 0 can be
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* configured as 64-bit.
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*/
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#define HPET_TIMER_COMP(x) REG32(ISH_HPET_BASE + 0x108 + ((x) * 0x20))
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#define HPET_TIMER0_COMP_64 REG64(ISH_HPET_BASE + 0x108)
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/* ISH 4/5: Special status register
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* Use this register to see HPET timer are settled after a write.
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*/
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#define HPET_CTRL_STATUS REG32(ISH_HPET_BASE + 0x160)
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#define HPET_INT_STATUS_SETTLING BIT(1)
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#define HPET_MAIN_COUNTER_SETTLING (BIT(2) | BIT(3))
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#define HPET_T0_CAP_SETTLING BIT(4)
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#define HPET_T1_CAP_SETTLING BIT(5)
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#define HPET_T0_CMP_SETTLING (BIT(7) | BIT(8))
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#define HPET_T1_CMP_SETTLING BIT(9)
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#define HPET_MAIN_COUNTER_VALID BIT(13)
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#define HPET_T1_SETTLING (HPET_T1_CAP_SETTLING | \
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HPET_T1_CMP_SETTLING)
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#define HPET_T0_SETTLING (HPET_T0_CAP_SETTLING | \
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HPET_T0_CMP_SETTLING)
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#define HPET_ANY_SETTLING (BIT(12) - 1)
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#if defined(CHIP_FAMILY_ISH3)
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#define ISH_HPET_CLK_FREQ 12000000 /* 12 MHz clock */
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#elif defined(CHIP_FAMILY_ISH4) || defined(CHIP_FAMILY_ISH5)
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#define ISH_HPET_CLK_FREQ 32768 /* 32.768 KHz clock */
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#endif
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#endif /* __CROS_EC_HPET_H */
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