linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) 2017 Spreadtrum Communications Inc.

 */

​

#include <linux/init.h>

#include <linux/interrupt.h>

​

#include "timer-of.h"

​

#define TIMER_NAME      "sprd_timer"

​

#define TIMER_LOAD_LO       0x0

#define TIMER_LOAD_HI       0x4

#define TIMER_VALUE_LO      0x8

#define TIMER_VALUE_HI      0xc

​

#define TIMER_CTL       0x10

#define TIMER_CTL_PERIOD_MODE   BIT(0)

#define TIMER_CTL_ENABLE    BIT(1)

#define TIMER_CTL_64BIT_WIDTH   BIT(16)

​

#define TIMER_INT       0x14

#define TIMER_INT_EN        BIT(0)

#define TIMER_INT_RAW_STS   BIT(1)

#define TIMER_INT_MASK_STS  BIT(2)

#define TIMER_INT_CLR       BIT(3)

​

#define TIMER_VALUE_SHDW_LO 0x18

#define TIMER_VALUE_SHDW_HI 0x1c

​

#define TIMER_VALUE_LO_MASK GENMASK(31, 0)

​

static void sprd_timer_enable(void __iomem *base, u32 flag)

{

    u32 val = readl_relaxed(base + TIMER_CTL);

​

    val |= TIMER_CTL_ENABLE;

    if (flag & TIMER_CTL_64BIT_WIDTH)

        val |= TIMER_CTL_64BIT_WIDTH;

    else

        val &= ~TIMER_CTL_64BIT_WIDTH;

​

    if (flag & TIMER_CTL_PERIOD_MODE)

        val |= TIMER_CTL_PERIOD_MODE;

    else

        val &= ~TIMER_CTL_PERIOD_MODE;

​

    writel_relaxed(val, base + TIMER_CTL);

}

​

static void sprd_timer_disable(void __iomem *base)

{

    u32 val = readl_relaxed(base + TIMER_CTL);

​

    val &= ~TIMER_CTL_ENABLE;

    writel_relaxed(val, base + TIMER_CTL);

}

​

static void sprd_timer_update_counter(void __iomem *base, unsigned long cycles)

{

    writel_relaxed(cycles & TIMER_VALUE_LO_MASK, base + TIMER_LOAD_LO);

    writel_relaxed(0, base + TIMER_LOAD_HI);