s5p_mfc_intr.c

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/*
 * drivers/media/platform/samsung/mfc5/s5p_mfc_intr.c
 *
 * C file for Samsung MFC (Multi Function Codec - FIMV) driver
 * This file contains functions used to wait for command completion.
 *
 * Kamil Debski, Copyright (C) 2011 Samsung Electronics Co., Ltd.
 * http://www.samsung.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include "s5p_mfc_common.h"
#include "s5p_mfc_debug.h"
#include "s5p_mfc_intr.h"

int s5p_mfc_wait_for_done_dev(struct s5p_mfc_dev *dev, int command)
{
    int ret;

    ret = wait_event_interruptible_timeout(dev->queue,
        (dev->int_cond && (dev->int_type == command
        || dev->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
        msecs_to_jiffies(MFC_INT_TIMEOUT));
    if (ret == 0) {
        mfc_err("Interrupt (dev->int_type:%d, command:%d) timed out\n",
                            dev->int_type, command);
        return 1;
    } else if (ret == -ERESTARTSYS) {
        mfc_err("Interrupted by a signal\n");
        return 1;
    }
    mfc_debug(1, "Finished waiting (dev->int_type:%d, command: %d)\n",
                            dev->int_type, command);
    if (dev->int_type == S5P_MFC_R2H_CMD_ERR_RET)
        return 1;
    return 0;
}

void s5p_mfc_clean_dev_int_flags(struct s5p_mfc_dev *dev)
{
    dev->int_cond = 0;
    dev->int_type = 0;
    dev->int_err = 0;
}

int s5p_mfc_wait_for_done_ctx(struct s5p_mfc_ctx *ctx,
                    int command, int interrupt)
{
    int ret;

    if (interrupt) {
        ret = wait_event_interruptible_timeout(ctx->queue,
                (ctx->int_cond && (ctx->int_type == command
            || ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
                    msecs_to_jiffies(MFC_INT_TIMEOUT));
    } else {
        ret = wait_event_timeout(ctx->queue,
                (ctx->int_cond && (ctx->int_type == command
            || ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
                    msecs_to_jiffies(MFC_INT_TIMEOUT));
    }
    if (ret == 0) {
        mfc_err("Interrupt (ctx->int_type:%d, command:%d) timed out\n",
                            ctx->int_type, command);
        return 1;
    } else if (ret == -ERESTARTSYS) {
        mfc_err("Interrupted by a signal\n");
        return 1;
    }
    mfc_debug(1, "Finished waiting (ctx->int_type:%d, command: %d)\n",
                            ctx->int_type, command);
    if (ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)
        return 1;
    return 0;
}

void s5p_mfc_clean_ctx_int_flags(struct s5p_mfc_ctx *ctx)
{
    ctx->int_cond = 0;
    ctx->int_type = 0;
    ctx->int_err = 0;
}