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/*
* drivers/media/platform/s5p-mfc/s5p_mfc_opr.c
*
* Samsung MFC (Multi Function Codec - FIMV) driver
* This file contains hw related functions.
*
* Kamil Debski, Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "s5p_mfc_debug.h"
#include "s5p_mfc_opr.h"
#include "s5p_mfc_opr_v5.h"
#include "s5p_mfc_opr_v6.h"
static struct s5p_mfc_hw_ops *s5p_mfc_ops;
void s5p_mfc_init_hw_ops(struct s5p_mfc_dev *dev)
{
if (IS_MFCV6_PLUS(dev)) {
s5p_mfc_ops = s5p_mfc_init_hw_ops_v6();
dev->warn_start = S5P_FIMV_ERR_WARNINGS_START_V6;
} else {
s5p_mfc_ops = s5p_mfc_init_hw_ops_v5();
dev->warn_start = S5P_FIMV_ERR_WARNINGS_START;
}
dev->mfc_ops = s5p_mfc_ops;
}
void s5p_mfc_init_regs(struct s5p_mfc_dev *dev)
{
if (IS_MFCV6_PLUS(dev))
dev->mfc_regs = s5p_mfc_init_regs_v6_plus(dev);
}
int s5p_mfc_alloc_priv_buf(struct s5p_mfc_dev *dev, unsigned int mem_ctx,
struct s5p_mfc_priv_buf *b)
{
unsigned int bits = dev->mem_size >> PAGE_SHIFT;
unsigned int count = b->size >> PAGE_SHIFT;
unsigned int align = (SZ_64K >> PAGE_SHIFT) - 1;
unsigned int start, offset;
mfc_debug(3, "Allocating priv: %zu\n", b->size);
if (dev->mem_virt) {
start = bitmap_find_next_zero_area(dev->mem_bitmap, bits, 0, count, align);
if (start > bits)
goto no_mem;
bitmap_set(dev->mem_bitmap, start, count);
offset = start << PAGE_SHIFT;
b->virt = dev->mem_virt + offset;
b->dma = dev->mem_base + offset;
} else {
struct device *mem_dev = dev->mem_dev[mem_ctx];
dma_addr_t base = dev->dma_base[mem_ctx];
b->ctx = mem_ctx;
b->virt = dma_alloc_coherent(mem_dev, b->size, &b->dma, GFP_KERNEL);
if (!b->virt)
goto no_mem;
if (b->dma < base) {
mfc_err("Invalid memory configuration - buffer (%pad) is below base memory address(%pad)\n",
&b->dma, &base);
dma_free_coherent(mem_dev, b->size, b->virt, b->dma);
return -ENOMEM;
}
}
mfc_debug(3, "Allocated addr %p %pad\n", b->virt, &b->dma);
return 0;
no_mem:
mfc_err("Allocating private buffer of size %zu failed\n", b->size);
return -ENOMEM;
}
void s5p_mfc_release_priv_buf(struct s5p_mfc_dev *dev,
struct s5p_mfc_priv_buf *b)
{
if (dev->mem_virt) {
unsigned int start = (b->dma - dev->mem_base) >> PAGE_SHIFT;
unsigned int count = b->size >> PAGE_SHIFT;
bitmap_clear(dev->mem_bitmap, start, count);
} else {
struct device *mem_dev = dev->mem_dev[b->ctx];
dma_free_coherent(mem_dev, b->size, b->virt, b->dma);
}
b->virt = NULL;
b->dma = 0;
b->size = 0;
}
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