drivers/media/platform/s5p-mfc/s5p_mfc_intr.c

   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
  24 int 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
  47 void 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
  54 int 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
  85 void 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