128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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* drivers/media/platform/s5p-mfc/s5p_mfc_opr.c
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*
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* Samsung MFC (Multi Function Codec - FIMV) driver
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* This file contains hw related functions.
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*
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* Kamil Debski, Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "s5p_mfc_debug.h"
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#include "s5p_mfc_opr.h"
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#include "s5p_mfc_opr_v5.h"
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#include "s5p_mfc_opr_v6.h"
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static struct s5p_mfc_hw_ops *s5p_mfc_ops;
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void s5p_mfc_init_hw_ops(struct s5p_mfc_dev *dev)
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{
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if (IS_MFCV6_PLUS(dev)) {
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s5p_mfc_ops = s5p_mfc_init_hw_ops_v6();
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dev->warn_start = S5P_FIMV_ERR_WARNINGS_START_V6;
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} else {
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s5p_mfc_ops = s5p_mfc_init_hw_ops_v5();
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dev->warn_start = S5P_FIMV_ERR_WARNINGS_START;
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}
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dev->mfc_ops = s5p_mfc_ops;
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}
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void s5p_mfc_init_regs(struct s5p_mfc_dev *dev)
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{
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if (IS_MFCV6_PLUS(dev))
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dev->mfc_regs = s5p_mfc_init_regs_v6_plus(dev);
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}
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int s5p_mfc_alloc_priv_buf(struct s5p_mfc_dev *dev, unsigned int mem_ctx,
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struct s5p_mfc_priv_buf *b)
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{
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unsigned int bits = dev->mem_size >> PAGE_SHIFT;
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unsigned int count = b->size >> PAGE_SHIFT;
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unsigned int align = (SZ_64K >> PAGE_SHIFT) - 1;
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unsigned int start, offset;
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mfc_debug(3, "Allocating priv: %zu\n", b->size);
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if (dev->mem_virt) {
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start = bitmap_find_next_zero_area(dev->mem_bitmap, bits, 0, count, align);
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if (start > bits)
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goto no_mem;
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bitmap_set(dev->mem_bitmap, start, count);
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offset = start << PAGE_SHIFT;
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b->virt = dev->mem_virt + offset;
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b->dma = dev->mem_base + offset;
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} else {
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struct device *mem_dev = dev->mem_dev[mem_ctx];
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dma_addr_t base = dev->dma_base[mem_ctx];
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b->ctx = mem_ctx;
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b->virt = dma_alloc_coherent(mem_dev, b->size, &b->dma, GFP_KERNEL);
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if (!b->virt)
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goto no_mem;
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if (b->dma < base) {
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mfc_err("Invalid memory configuration - buffer (%pad) is below base memory address(%pad)\n",
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&b->dma, &base);
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dma_free_coherent(mem_dev, b->size, b->virt, b->dma);
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return -ENOMEM;
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}
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}
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mfc_debug(3, "Allocated addr %p %pad\n", b->virt, &b->dma);
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return 0;
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no_mem:
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mfc_err("Allocating private buffer of size %zu failed\n", b->size);
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return -ENOMEM;
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}
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int s5p_mfc_alloc_generic_buf(struct s5p_mfc_dev *dev, unsigned int mem_ctx,
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struct s5p_mfc_priv_buf *b)
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{
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struct device *mem_dev = dev->mem_dev[mem_ctx];
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mfc_debug(3, "Allocating generic buf: %zu\n", b->size);
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b->ctx = mem_ctx;
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b->virt = dma_alloc_coherent(mem_dev, b->size, &b->dma, GFP_KERNEL);
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if (!b->virt)
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goto no_mem;
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mfc_debug(3, "Allocated addr %p %pad\n", b->virt, &b->dma);
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return 0;
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no_mem:
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mfc_err("Allocating generic buffer of size %zu failed\n", b->size);
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return -ENOMEM;
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}
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void s5p_mfc_release_priv_buf(struct s5p_mfc_dev *dev,
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struct s5p_mfc_priv_buf *b)
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{
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if (dev->mem_virt) {
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unsigned int start = (b->dma - dev->mem_base) >> PAGE_SHIFT;
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unsigned int count = b->size >> PAGE_SHIFT;
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bitmap_clear(dev->mem_bitmap, start, count);
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} else {
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struct device *mem_dev = dev->mem_dev[b->ctx];
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dma_free_coherent(mem_dev, b->size, b->virt, b->dma);
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}
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b->virt = NULL;
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b->dma = 0;
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b->size = 0;
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}
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void s5p_mfc_release_generic_buf(struct s5p_mfc_dev *dev,
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struct s5p_mfc_priv_buf *b)
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{
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struct device *mem_dev = dev->mem_dev[b->ctx];
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dma_free_coherent(mem_dev, b->size, b->virt, b->dma);
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b->virt = NULL;
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b->dma = 0;
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b->size = 0;
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}
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