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_PLUS(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 void s5p_mfc_init_regs(struct s5p_mfc_dev *dev)
  35 {
  36         if (IS_MFCV6_PLUS(dev))
  37                 dev->mfc_regs = s5p_mfc_init_regs_v6_plus(dev);
  38 }
  39
  40 int s5p_mfc_alloc_priv_buf(struct device *dev, dma_addr_t base,
  41                                         struct s5p_mfc_priv_buf *b)
  42 {
  43         mfc_debug(3, "Allocating priv: %zu\n", b->size);
  44
  45         b->virt = dma_alloc_coherent(dev, b->size, &b->dma, GFP_KERNEL);
  46
  47         if (!b->virt) {
  48                 mfc_err("Allocating private buffer of size %zu failed\n",
  49                         b->size);
  50                 return -ENOMEM;
  51         }
  52
  53         if (b->dma < base) {
  54                 mfc_err("Invalid memory configuration - buffer (%pad) is below base memory address(%pad)\n",
  55                         &b->dma, &base);
  56                 dma_free_coherent(dev, b->size, b->virt, b->dma);
  57                 return -ENOMEM;
  58         }
  59
  60         mfc_debug(3, "Allocated addr %p %pad\n", b->virt, &b->dma);
  61         return 0;
  62 }
  63
  64 void s5p_mfc_release_priv_buf(struct device *dev,
  65                                                 struct s5p_mfc_priv_buf *b)
  66 {
  67         if (b->virt) {
  68                 dma_free_coherent(dev, b->size, b->virt, b->dma);
  69                 b->virt = NULL;
  70                 b->dma = 0;
  71                 b->size = 0;
  72         }
  73 }
  74