8ffdff6a8c
The comedi code came into the kernel back in 2008, but traces its lifetime to much much earlier. It's been polished and buffed and there's really nothing preventing it from being part of the "real" portion of the kernel. So move it to drivers/comedi/ as it belongs there. Many thanks to the hundreds of developers who did the work to make this happen. Cc: Ian Abbott <abbotti@mev.co.uk> Cc: H Hartley Sweeten <hsweeten@visionengravers.com> Link: https://lore.kernel.org/r/YHauop4u3sP6lz8j@kroah.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/* 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
|