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
s5p_mfc_init_hw_ops(struct s5p_mfc_dev * dev)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
s5p_mfc_init_regs(struct s5p_mfc_dev * dev)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
s5p_mfc_alloc_priv_buf(struct device * dev,dma_addr_t base,struct s5p_mfc_priv_buf * b)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 failed\n");
49 return -ENOMEM;
50 }
51
52 if (b->dma < base) {
53 mfc_err("Invaling memory configuration!\n");
54 mfc_err("Allocated buffer (%pad) is lower than memory base 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
s5p_mfc_release_priv_buf(struct device * dev,struct s5p_mfc_priv_buf * b)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
75