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https://github.com/AsahiLinux/u-boot
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d7b006393e
The EPU Finite State Machie (FSM) is used in both the last stage of system suspend and the earliest stage of system resume. Signed-off-by: Hongbo Zhang <hongbo.zhang@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
214 lines
7.1 KiB
C
214 lines
7.1 KiB
C
/*
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* Copyright 2014 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include "fsl_epu.h"
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struct fsm_reg_vals epu_default_val[] = {
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/* EPGCR (Event Processor Global Control Register) */
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{EPGCR, 0},
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/* EPECR (Event Processor Event Control Registers) */
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{EPECR0 + EPECR_STRIDE * 0, 0},
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{EPECR0 + EPECR_STRIDE * 1, 0},
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{EPECR0 + EPECR_STRIDE * 2, 0xF0004004},
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{EPECR0 + EPECR_STRIDE * 3, 0x80000084},
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{EPECR0 + EPECR_STRIDE * 4, 0x20000084},
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{EPECR0 + EPECR_STRIDE * 5, 0x08000004},
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{EPECR0 + EPECR_STRIDE * 6, 0x80000084},
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{EPECR0 + EPECR_STRIDE * 7, 0x80000084},
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{EPECR0 + EPECR_STRIDE * 8, 0x60000084},
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{EPECR0 + EPECR_STRIDE * 9, 0x08000084},
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{EPECR0 + EPECR_STRIDE * 10, 0x42000084},
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{EPECR0 + EPECR_STRIDE * 11, 0x90000084},
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{EPECR0 + EPECR_STRIDE * 12, 0x80000084},
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{EPECR0 + EPECR_STRIDE * 13, 0x08000084},
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{EPECR0 + EPECR_STRIDE * 14, 0x02000084},
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{EPECR0 + EPECR_STRIDE * 15, 0x00000004},
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/*
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* EPEVTCR (Event Processor EVT Pin Control Registers)
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* SCU8 triger EVT2, and SCU11 triger EVT9
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*/
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{EPEVTCR0 + EPEVTCR_STRIDE * 0, 0},
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{EPEVTCR0 + EPEVTCR_STRIDE * 1, 0},
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{EPEVTCR0 + EPEVTCR_STRIDE * 2, 0x80000001},
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{EPEVTCR0 + EPEVTCR_STRIDE * 3, 0},
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{EPEVTCR0 + EPEVTCR_STRIDE * 4, 0},
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{EPEVTCR0 + EPEVTCR_STRIDE * 5, 0},
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{EPEVTCR0 + EPEVTCR_STRIDE * 6, 0},
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{EPEVTCR0 + EPEVTCR_STRIDE * 7, 0},
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{EPEVTCR0 + EPEVTCR_STRIDE * 8, 0},
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{EPEVTCR0 + EPEVTCR_STRIDE * 9, 0xB0000001},
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/* EPCMPR (Event Processor Counter Compare Registers) */
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{EPCMPR0 + EPCMPR_STRIDE * 0, 0},
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{EPCMPR0 + EPCMPR_STRIDE * 1, 0},
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{EPCMPR0 + EPCMPR_STRIDE * 2, 0x000000FF},
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{EPCMPR0 + EPCMPR_STRIDE * 3, 0},
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{EPCMPR0 + EPCMPR_STRIDE * 4, 0x000000FF},
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{EPCMPR0 + EPCMPR_STRIDE * 5, 0x00000020},
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{EPCMPR0 + EPCMPR_STRIDE * 6, 0},
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{EPCMPR0 + EPCMPR_STRIDE * 7, 0},
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{EPCMPR0 + EPCMPR_STRIDE * 8, 0x000000FF},
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{EPCMPR0 + EPCMPR_STRIDE * 9, 0x000000FF},
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{EPCMPR0 + EPCMPR_STRIDE * 10, 0x000000FF},
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{EPCMPR0 + EPCMPR_STRIDE * 11, 0x000000FF},
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{EPCMPR0 + EPCMPR_STRIDE * 12, 0x000000FF},
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{EPCMPR0 + EPCMPR_STRIDE * 13, 0},
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{EPCMPR0 + EPCMPR_STRIDE * 14, 0x000000FF},
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{EPCMPR0 + EPCMPR_STRIDE * 15, 0x000000FF},
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/* EPCCR (Event Processor Counter Control Registers) */
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{EPCCR0 + EPCCR_STRIDE * 0, 0},
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{EPCCR0 + EPCCR_STRIDE * 1, 0},
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{EPCCR0 + EPCCR_STRIDE * 2, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 3, 0},
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{EPCCR0 + EPCCR_STRIDE * 4, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 5, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 6, 0},
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{EPCCR0 + EPCCR_STRIDE * 7, 0},
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{EPCCR0 + EPCCR_STRIDE * 8, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 9, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 10, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 11, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 12, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 13, 0},
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{EPCCR0 + EPCCR_STRIDE * 14, 0x92840000},
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{EPCCR0 + EPCCR_STRIDE * 15, 0x92840000},
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/* EPSMCR (Event Processor SCU Mux Control Registers) */
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{EPSMCR0 + EPSMCR_STRIDE * 0, 0},
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{EPSMCR0 + EPSMCR_STRIDE * 1, 0},
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{EPSMCR0 + EPSMCR_STRIDE * 2, 0x6C700000},
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{EPSMCR0 + EPSMCR_STRIDE * 3, 0x2F000000},
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{EPSMCR0 + EPSMCR_STRIDE * 4, 0x002F0000},
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{EPSMCR0 + EPSMCR_STRIDE * 5, 0x00002E00},
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{EPSMCR0 + EPSMCR_STRIDE * 6, 0x7C000000},
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{EPSMCR0 + EPSMCR_STRIDE * 7, 0x30000000},
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{EPSMCR0 + EPSMCR_STRIDE * 8, 0x64300000},
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{EPSMCR0 + EPSMCR_STRIDE * 9, 0x00003000},
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{EPSMCR0 + EPSMCR_STRIDE * 10, 0x65000030},
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{EPSMCR0 + EPSMCR_STRIDE * 11, 0x31740000},
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{EPSMCR0 + EPSMCR_STRIDE * 12, 0x7F000000},
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{EPSMCR0 + EPSMCR_STRIDE * 13, 0x00003100},
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{EPSMCR0 + EPSMCR_STRIDE * 14, 0x00000031},
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{EPSMCR0 + EPSMCR_STRIDE * 15, 0x76000000},
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/* EPACR (Event Processor Action Control Registers) */
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{EPACR0 + EPACR_STRIDE * 0, 0},
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{EPACR0 + EPACR_STRIDE * 1, 0},
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{EPACR0 + EPACR_STRIDE * 2, 0},
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{EPACR0 + EPACR_STRIDE * 3, 0x00000080},
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{EPACR0 + EPACR_STRIDE * 4, 0},
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{EPACR0 + EPACR_STRIDE * 5, 0x00000040},
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{EPACR0 + EPACR_STRIDE * 6, 0},
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{EPACR0 + EPACR_STRIDE * 7, 0},
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{EPACR0 + EPACR_STRIDE * 8, 0},
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{EPACR0 + EPACR_STRIDE * 9, 0x0000001C},
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{EPACR0 + EPACR_STRIDE * 10, 0x00000020},
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{EPACR0 + EPACR_STRIDE * 11, 0},
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{EPACR0 + EPACR_STRIDE * 12, 0x00000003},
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{EPACR0 + EPACR_STRIDE * 13, 0x06000000},
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{EPACR0 + EPACR_STRIDE * 14, 0x04000000},
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{EPACR0 + EPACR_STRIDE * 15, 0x02000000},
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/* EPIMCR (Event Processor Input Mux Control Registers) */
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{EPIMCR0 + EPIMCR_STRIDE * 0, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 1, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 2, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 3, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 4, 0x44000000},
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{EPIMCR0 + EPIMCR_STRIDE * 5, 0x40000000},
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{EPIMCR0 + EPIMCR_STRIDE * 6, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 7, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 8, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 9, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 10, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 11, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 12, 0x44000000},
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{EPIMCR0 + EPIMCR_STRIDE * 13, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 14, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 15, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 16, 0x6A000000},
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{EPIMCR0 + EPIMCR_STRIDE * 17, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 18, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 19, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 20, 0x48000000},
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{EPIMCR0 + EPIMCR_STRIDE * 21, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 22, 0x6C000000},
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{EPIMCR0 + EPIMCR_STRIDE * 23, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 24, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 25, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 26, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 27, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 28, 0x76000000},
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{EPIMCR0 + EPIMCR_STRIDE * 29, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 30, 0},
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{EPIMCR0 + EPIMCR_STRIDE * 31, 0x76000000},
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/* EPXTRIGCR (Event Processor Crosstrigger Control Register) */
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{EPXTRIGCR, 0x0000FFDF},
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/* end */
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{FSM_END_FLAG, 0},
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};
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/**
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* fsl_epu_setup - Setup EPU registers to default values
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*/
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void fsl_epu_setup(void *epu_base)
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{
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struct fsm_reg_vals *data = epu_default_val;
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if (!epu_base || !data)
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return;
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while (data->offset != FSM_END_FLAG) {
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out_be32(epu_base + data->offset, data->value);
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data++;
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}
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}
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/**
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* fsl_epu_clean - Clear EPU registers
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*/
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void fsl_epu_clean(void *epu_base)
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{
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u32 offset;
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/* follow the exact sequence to clear the registers */
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/* Clear EPACRn */
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for (offset = EPACR0; offset <= EPACR15; offset += EPACR_STRIDE)
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out_be32(epu_base + offset, 0);
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/* Clear EPEVTCRn */
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for (offset = EPEVTCR0; offset <= EPEVTCR9; offset += EPEVTCR_STRIDE)
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out_be32(epu_base + offset, 0);
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/* Clear EPGCR */
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out_be32(epu_base + EPGCR, 0);
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/* Clear EPSMCRn */
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for (offset = EPSMCR0; offset <= EPSMCR15; offset += EPSMCR_STRIDE)
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out_be32(epu_base + offset, 0);
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/* Clear EPCCRn */
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for (offset = EPCCR0; offset <= EPCCR31; offset += EPCCR_STRIDE)
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out_be32(epu_base + offset, 0);
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/* Clear EPCMPRn */
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for (offset = EPCMPR0; offset <= EPCMPR31; offset += EPCMPR_STRIDE)
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out_be32(epu_base + offset, 0);
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/* Clear EPCTRn */
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for (offset = EPCTR0; offset <= EPCTR31; offset += EPCTR_STRIDE)
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out_be32(epu_base + offset, 0);
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/* Clear EPIMCRn */
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for (offset = EPIMCR0; offset <= EPIMCR31; offset += EPIMCR_STRIDE)
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out_be32(epu_base + offset, 0);
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/* Clear EPXTRIGCRn */
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out_be32(epu_base + EPXTRIGCR, 0);
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/* Clear EPECRn */
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for (offset = EPECR0; offset <= EPECR15; offset += EPECR_STRIDE)
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out_be32(epu_base + offset, 0);
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}
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