LXR linux/drivers/media/platform/s5p-mfc/s5p_mfc

   1/*
   2 * drivers/media/platform/samsung/mfc5/s5p_mfc_intr.c
   3 *
   4 * C file for Samsung MFC (Multi Function Codec - FIMV) driver
   5 * This file contains functions used to wait for command completion.
   6 *
   7 * Kamil Debski, Copyright (C) 2011 Samsung Electronics Co., Ltd.
   8 * http://www.samsung.com/
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13 */
  14
  15#include <linux/delay.h>
  16#include <linux/errno.h>
  17#include <linux/io.h>
  18#include <linux/sched.h>
  19#include <linux/wait.h>
  20#include "s5p_mfc_common.h"
  21#include "s5p_mfc_debug.h"
  22#include "s5p_mfc_intr.h"
  23
  24int s5p_mfc_wait_for_done_dev(struct s5p_mfc_dev *dev, int command)
  25{
  26        int ret;
  27
  28        ret = wait_event_interruptible_timeout(dev->queue,
  29                (dev->int_cond && (dev->int_type == command
  30                || dev->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
  31                msecs_to_jiffies(MFC_INT_TIMEOUT));
  32        if (ret == 0) {
  33                mfc_err("Interrupt (dev->int_type:%d, command:%d) timed out\n",
  34                                                        dev->int_type, command);
  35                return 1;
  36        } else if (ret == -ERESTARTSYS) {
  37                mfc_err("Interrupted by a signal\n");
  38                return 1;
  39        }
  40        mfc_debug(1, "Finished waiting (dev->int_type:%d, command: %d)\n",
  41                                                        dev->int_type, command);
  42        if (dev->int_type == S5P_MFC_R2H_CMD_ERR_RET)
  43                return 1;
  44        return 0;
  45}
  46
  47void s5p_mfc_clean_dev_int_flags(struct s5p_mfc_dev *dev)
  48{
  49        dev->int_cond = 0;
  50        dev->int_type = 0;
  51        dev->int_err = 0;
  52}
  53
  54int s5p_mfc_wait_for_done_ctx(struct s5p_mfc_ctx *ctx,
  55                                    int command, int interrupt)
  56{
  57        int ret;
  58
  59        if (interrupt) {
  60                ret = wait_event_interruptible_timeout(ctx->queue,
  61                                (ctx->int_cond && (ctx->int_type == command
  62                        || ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
  63                                        msecs_to_jiffies(MFC_INT_TIMEOUT));
  64        } else {
  65                ret = wait_event_timeout(ctx->queue,
  66                                (ctx->int_cond && (ctx->int_type == command
  67                        || ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)),
  68                                        msecs_to_jiffies(MFC_INT_TIMEOUT));
  69        }
  70        if (ret == 0) {
  71                mfc_err("Interrupt (ctx->int_type:%d, command:%d) timed out\n",
  72                                                        ctx->int_type, command);
  73                return 1;
  74        } else if (ret == -ERESTARTSYS) {
  75                mfc_err("Interrupted by a signal\n");
  76                return 1;
  77        }
  78        mfc_debug(1, "Finished waiting (ctx->int_type:%d, command: %d)\n",
  79                                                        ctx->int_type, command);
  80        if (ctx->int_type == S5P_MFC_R2H_CMD_ERR_RET)
  81                return 1;
  82        return 0;
  83}
  84
  85void s5p_mfc_clean_ctx_int_flags(struct s5p_mfc_ctx *ctx)
  86{
  87        ctx->int_cond = 0;
  88        ctx->int_type = 0;
  89        ctx->int_err = 0;
  90}
  91
  92