linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Qualcomm Peripheral Image Loader for Q6V5

 *

 * Copyright (C) 2016-2018 Linaro Ltd.

 * Copyright (C) 2014 Sony Mobile Communications AB

 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.

 */

#include <linux/kernel.h>

#include <linux/platform_device.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/soc/qcom/smem.h>

#include <linux/soc/qcom/smem_state.h>

#include <linux/remoteproc.h>

#include "qcom_q6v5.h"

​

/**

 * qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start

 * @q6v5:   reference to qcom_q6v5 context to be reinitialized

 *

 * Return: 0 on success, negative errno on failure

 */

int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5)

{

    reinit_completion(&q6v5->start_done);

    reinit_completion(&q6v5->stop_done);

​

    q6v5->running = true;

    q6v5->handover_issued = false;

​

    enable_irq(q6v5->handover_irq);

​

    return 0;

}

EXPORT_SYMBOL_GPL(qcom_q6v5_prepare);

​

/**

 * qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop

 * @q6v5:   reference to qcom_q6v5 context to be unprepared

 *

 * Return: 0 on success, 1 if handover hasn't yet been called

 */

int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)

{

    disable_irq(q6v5->handover_irq);

​

    return !q6v5->handover_issued;

}

EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare);

​

static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)

{

    struct qcom_q6v5 *q6v5 = data;

    size_t len;

    char *msg;

​

    /* Sometimes the stop triggers a watchdog rather than a stop-ack */

    if (!q6v5->running) {

        complete(&q6v5->stop_done);

        return IRQ_HANDLED;

    }

​