drivers/media/platform/s5p-mfc/s5p_mfc_opr.c

   1 /*
   2  * drivers/media/platform/s5p-mfc/s5p_mfc_opr.c
   3  *
   4  * Samsung MFC (Multi Function Codec - FIMV) driver
   5  * This file contains hw related functions.
   6  *
   7  * Kamil Debski, Copyright (c) 2012 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 "s5p_mfc_debug.h"
  16 #include "s5p_mfc_opr.h"
  17 #include "s5p_mfc_opr_v5.h"
  18 #include "s5p_mfc_opr_v6.h"
  19
  20 static struct s5p_mfc_hw_ops *s5p_mfc_ops;
  21
  22 void s5p_mfc_init_hw_ops(struct s5p_mfc_dev *dev)
  23 {
  24         if (IS_MFCV6(dev)) {
  25                 s5p_mfc_ops = s5p_mfc_init_hw_ops_v6();
  26                 dev->warn_start = S5P_FIMV_ERR_WARNINGS_START_V6;
  27         } else {
  28                 s5p_mfc_ops = s5p_mfc_init_hw_ops_v5();
  29                 dev->warn_start = S5P_FIMV_ERR_WARNINGS_START;
  30         }
  31         dev->mfc_ops = s5p_mfc_ops;
  32 }
  33
  34 int s5p_mfc_alloc_priv_buf(struct device *dev,
  35                                         struct s5p_mfc_priv_buf *b)
  36 {
  37
  38         mfc_debug(3, "Allocating priv: %d\n", b->size);
  39
  40         b->virt = dma_alloc_coherent(dev, b->size, &b->dma, GFP_KERNEL);
  41
  42         if (!b->virt) {
  43                 mfc_err("Allocating private buffer failed\n");
  44                 return -ENOMEM;
  45         }
  46
  47         mfc_debug(3, "Allocated addr %p %08x\n", b->virt, b->dma);
  48         return 0;
  49 }
  50
  51 void s5p_mfc_release_priv_buf(struct device *dev,
  52                                                 struct s5p_mfc_priv_buf *b)
  53 {
  54         if (b->virt) {
  55                 dma_free_coherent(dev, b->size, b->virt, b->dma);
  56                 b->virt = NULL;
  57                 b->dma = 0;
  58                 b->size = 0;
  59         }
  60 }
  61