/* 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 <ds@schleef.org>
|
*/
|
|
#ifndef _MITE_H_
|
#define _MITE_H_
|
|
#include <linux/spinlock.h>
|
|
#define MAX_MITE_DMA_CHANNELS 8
|
|
struct comedi_device;
|
struct comedi_subdevice;
|
struct device;
|
struct pci_dev;
|
|
struct mite_dma_desc {
|
__le32 count;
|
__le32 addr;
|
__le32 next;
|
u32 dar;
|
};
|
|
struct mite_ring {
|
struct device *hw_dev;
|
unsigned int n_links;
|
struct mite_dma_desc *descs;
|
dma_addr_t dma_addr;
|
};
|
|
struct mite_channel {
|
struct mite *mite;
|
unsigned int channel;
|
int dir;
|
int done;
|
struct mite_ring *ring;
|
};
|
|
struct mite {
|
struct pci_dev *pcidev;
|
void __iomem *mmio;
|
struct mite_channel channels[MAX_MITE_DMA_CHANNELS];
|
int num_channels;
|
unsigned int fifo_size;
|
/* protects mite_channel from being released by the driver */
|
spinlock_t lock;
|
};
|
|
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 0xc0 /* IO Device Window Base Size */
|
#define MITE_IODWBSR_1 0xc4 /* IO Device Window1 Base Size */
|
#define WENAB BIT(7) /* window enable */
|
#define MITE_IODWCR_1 0xf4
|
|
#endif
|
