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

   1 /*
   2  * drivers/media/video/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 "regs-mfc.h"
  21 #include "s5p_mfc_common.h"
  22 #include "s5p_mfc_debug.h"
  23 #include "s5p_mfc_intr.h"
  24
  25 int s5p_mfc_wait_for_done_dev(struct s5p_mfc_dev *dev, int command)
  26 {
  27         int ret;
  28
  29         ret = wait_event_interruptible_timeout(dev->queue,
  30                 (dev->int_cond && (dev->int_type == command
  31                 || dev->int_type == S5P_FIMV_R2H_CMD_ERR_RET)),
  32                 msecs_to_jiffies(MFC_INT_TIMEOUT));
  33         if (ret == 0) {
  34                 mfc_err("Interrupt (dev->int_type:%d, command:%d) timed out\n",
  35                                                         dev->int_type, command);
  36                 return 1;
  37         } else if (ret == -ERESTARTSYS) {
  38                 mfc_err("Interrupted by a signal\n");
  39                 return 1;
  40         }
  41         mfc_debug(1, "Finished waiting (dev->int_type:%d, command: %d)\n",
  42                                                         dev->int_type, command);
  43         if (dev->int_type == S5P_FIMV_R2H_CMD_ERR_RET)
  44                 return 1;
  45         return 0;
  46 }
  47
  48 void s5p_mfc_clean_dev_int_flags(struct s5p_mfc_dev *dev)
  49 {
  50         dev->int_cond = 0;
  51         dev->int_type = 0;
  52         dev->int_err = 0;
  53 }
  54
  55 int s5p_mfc_wait_for_done_ctx(struct s5p_mfc_ctx *ctx,
  56                                     int command, int interrupt)
  57 {
  58         int ret;
  59
  60         if (interrupt) {
  61                 ret = wait_event_interruptible_timeout(ctx->queue,
  62                                 (ctx->int_cond && (ctx->int_type == command
  63                         || ctx->int_type == S5P_FIMV_R2H_CMD_ERR_RET)),
  64                                         msecs_to_jiffies(MFC_INT_TIMEOUT));
  65         } else {
  66                 ret = wait_event_timeout(ctx->queue,
  67                                 (ctx->int_cond && (ctx->int_type == command
  68                         || ctx->int_type == S5P_FIMV_R2H_CMD_ERR_RET)),
  69                                         msecs_to_jiffies(MFC_INT_TIMEOUT));
  70         }
  71         if (ret == 0) {
  72                 mfc_err("Interrupt (ctx->int_type:%d, command:%d) timed out\n",
  73                                                         ctx->int_type, command);
  74                 return 1;
  75         } else if (ret == -ERESTARTSYS) {
  76                 mfc_err("Interrupted by a signal\n");
  77                 return 1;
  78         }
  79         mfc_debug(1, "Finished waiting (ctx->int_type:%d, command: %d)\n",
  80                                                         ctx->int_type, command);
  81         if (ctx->int_type == S5P_FIMV_R2H_CMD_ERR_RET)
  82                 return 1;
  83         return 0;
  84 }
  85
  86 void s5p_mfc_clean_ctx_int_flags(struct s5p_mfc_ctx *ctx)
  87 {
  88         ctx->int_cond = 0;
  89         ctx->int_type = 0;
  90         ctx->int_err = 0;
  91 }
  92