linux/drivers/comedi/drivers/mite.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * module/mite.h
 * Hardware driver for NI Mite PCI interface chip
 *
 * COMEDI - Linux Control and Measurement Device Interface
 * Copyright (C) 1999 David A. Schleef <[email protected]>
 */

#ifndef _MITE_H_
#define _MITE_H_

#include <linux/spinlock.h>

#define MAX_MITE_DMA_CHANNELS …

struct comedi_device;
struct comedi_subdevice;
struct device;
struct pci_dev;

struct mite_dma_desc { … };

struct mite_ring { … };

struct mite_channel { … };

struct mite { … };

u32 mite_bytes_in_transit(struct mite_channel *mite_chan);

void mite_sync_dma(struct mite_channel *mite_chan, struct comedi_subdevice *s);
void mite_ack_linkc(struct mite_channel *mite_chan, struct comedi_subdevice *s,
		    bool sync);
int mite_done(struct mite_channel *mite_chan);

void mite_dma_arm(struct mite_channel *mite_chan);
void mite_dma_disarm(struct mite_channel *mite_chan);

void mite_prep_dma(struct mite_channel *mite_chan,
		   unsigned int num_device_bits, unsigned int num_memory_bits);

struct mite_channel *mite_request_channel_in_range(struct mite *mite,
						   struct mite_ring *ring,
						   unsigned int min_channel,
						   unsigned int max_channel);
struct mite_channel *mite_request_channel(struct mite *mite,
					  struct mite_ring *ring);
void mite_release_channel(struct mite_channel *mite_chan);

int mite_init_ring_descriptors(struct mite_ring *ring,
			       struct comedi_subdevice *s, unsigned int nbytes);
int mite_buf_change(struct mite_ring *ring, struct comedi_subdevice *s);

struct mite_ring *mite_alloc_ring(struct mite *mite);
void mite_free_ring(struct mite_ring *ring);

struct mite *mite_attach(struct comedi_device *dev, bool use_win1);
void mite_detach(struct mite *mite);

/*
 * Mite registers (used outside of the mite driver)
 */
#define MITE_IODWBSR …
#define MITE_IODWBSR_1 …
#define WENAB …
#define MITE_IODWCR_1 …

#endif