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

   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
  20static struct s5p_mfc_hw_ops *s5p_mfc_ops;
  21
  22void 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
  34int 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
  51void 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
  62