linux/drivers/media/pci/b2c2/flexcop-dma.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
 * flexcop-dma.c - configuring and controlling the DMA of the FlexCop
 * see flexcop.c for copyright information
 */
#include "flexcop.h"

int flexcop_dma_allocate(struct pci_dev *pdev,
		struct flexcop_dma *dma, u32 size)
{ … }
EXPORT_SYMBOL(…);

void flexcop_dma_free(struct flexcop_dma *dma)
{ … }
EXPORT_SYMBOL(…);

int flexcop_dma_config(struct flexcop_device *fc,
		struct flexcop_dma *dma,
		flexcop_dma_index_t dma_idx)
{ … }
EXPORT_SYMBOL(…);

/* start the DMA transfers, but not the DMA IRQs */
int flexcop_dma_xfer_control(struct flexcop_device *fc,
		flexcop_dma_index_t dma_idx,
		flexcop_dma_addr_index_t index,
		int onoff)
{ … }
EXPORT_SYMBOL(…);

static int flexcop_dma_remap(struct flexcop_device *fc,
		flexcop_dma_index_t dma_idx,
		int onoff)
{ … }

int flexcop_dma_control_size_irq(struct flexcop_device *fc,
		flexcop_dma_index_t no,
		int onoff)
{ … }
EXPORT_SYMBOL(…);

int flexcop_dma_control_timer_irq(struct flexcop_device *fc,
		flexcop_dma_index_t no,
		int onoff)
{ … }
EXPORT_SYMBOL(…);

/* 1 cycles = 1.97 msec */
int flexcop_dma_config_timer(struct flexcop_device *fc,
		flexcop_dma_index_t dma_idx, u8 cycles)
{ … }
EXPORT_SYMBOL(…);