rzg2-flash-writer/cpudrv.c at karo-txrz · karo-electronics/rzg2-flash-writer · GitHub

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/*
 * Copyright (c) 2015-2021, Renesas Electronics Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include "common.h"
#include "bit.h"
#include "cpg_regs.h"
#include "ostm_regs.h"
#include "cpudrv.h"

void StartTMU0(uint32_t tenmSec)
{
	uint32_t dataL;

	PowerOnTmu0();

	*((volatile uint8_t*)OSTM0CTL)  = 0x00U;		/* Interval Timer Mode */

	*((volatile uint32_t*)OSTM0CMP) = 100000U * tenmSec;	/* (100MHz)*100000=1000us */

	*((volatile uint8_t*)OSTM0TS) |= BIT0;			/* TMU0 Start */
	while(1)
	{
		dataL = *((volatile uint8_t*)OSTM0CNT);
		if (dataL == 0x0U)
		{
			break;
		}
	}
	*((volatile uint8_t*)OSTM0TT) |= BIT0;			/* TMU0 Stop */
}

void StartTMU0usec(uint32_t tenuSec)
{
	uint32_t dataL;

	PowerOnTmu0();

	*((volatile uint8_t*)OSTM0CTL)  = 0x00U;		/* Interval Timer Mode */

	*((volatile uint32_t*)OSTM0CMP) = 100U * tenuSec;	/* (100MHz)*100=1.0us */

	*((volatile uint8_t*)OSTM0TS) |= BIT0;			/* TMU0 Start */
	while(1)
	{
		dataL = *((volatile uint8_t*)OSTM0CNT);
		if (dataL == 0x0U)
		{
			break;
		}
	}
	*((volatile uint8_t*)OSTM0TT) |= BIT0;			/* TMU0 Stop */
}

void udelay(uint32_t count_us)
{
	StartTMU0usec(count_us);
}

void PowerOnTmu0(void)
{
	uint32_t dataL;

	dataL = *((volatile uint32_t*)CPG_CLKON_OSTM);
	dataL |= 0x00010001U;
	*((volatile uint32_t*)CPG_CLKON_OSTM) = dataL;
	do
	{
		dataL = *((volatile uint32_t*)CPG_CLKMON_OSTM);
	} while ((dataL & BIT0) == 0U);	/* wait until bit0=1 */

	dataL = *((volatile uint32_t*)CPG_RST_OSTM);
	dataL |= 0x00010001U;
	*((volatile uint32_t*)CPG_RST_OSTM) = dataL;
	do
	{
		dataL = *((volatile uint32_t*)CPG_RSTMON_OSTM);
	} while ((dataL & BIT0) == 1U);	/* wait until bit0=1 */
}