/*
 * Header file for NI general purpose counter support code (ni_tio.c)
 *
 * COMEDI - Linux Control and Measurement Device Interface
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef _COMEDI_NI_TIO_H
#define _COMEDI_NI_TIO_H

#include "../comedidev.h"

enum ni_gpct_register {
	NITIO_G0_AUTO_INC,
	NITIO_G1_AUTO_INC,
	NITIO_G2_AUTO_INC,
	NITIO_G3_AUTO_INC,
	NITIO_G0_CMD,
	NITIO_G1_CMD,
	NITIO_G2_CMD,
	NITIO_G3_CMD,
	NITIO_G0_HW_SAVE,
	NITIO_G1_HW_SAVE,
	NITIO_G2_HW_SAVE,
	NITIO_G3_HW_SAVE,
	NITIO_G0_SW_SAVE,
	NITIO_G1_SW_SAVE,
	NITIO_G2_SW_SAVE,
	NITIO_G3_SW_SAVE,
	NITIO_G0_MODE,
	NITIO_G1_MODE,
	NITIO_G2_MODE,
	NITIO_G3_MODE,
	NITIO_G0_LOADA,
	NITIO_G1_LOADA,
	NITIO_G2_LOADA,
	NITIO_G3_LOADA,
	NITIO_G0_LOADB,
	NITIO_G1_LOADB,
	NITIO_G2_LOADB,
	NITIO_G3_LOADB,
	NITIO_G0_INPUT_SEL,
	NITIO_G1_INPUT_SEL,
	NITIO_G2_INPUT_SEL,
	NITIO_G3_INPUT_SEL,
	NITIO_G0_CNT_MODE,
	NITIO_G1_CNT_MODE,
	NITIO_G2_CNT_MODE,
	NITIO_G3_CNT_MODE,
	NITIO_G0_GATE2,
	NITIO_G1_GATE2,
	NITIO_G2_GATE2,
	NITIO_G3_GATE2,
	NITIO_G01_STATUS,
	NITIO_G23_STATUS,
	NITIO_G01_RESET,
	NITIO_G23_RESET,
	NITIO_G01_STATUS1,
	NITIO_G23_STATUS1,
	NITIO_G01_STATUS2,
	NITIO_G23_STATUS2,
	NITIO_G0_DMA_CFG,
	NITIO_G1_DMA_CFG,
	NITIO_G2_DMA_CFG,
	NITIO_G3_DMA_CFG,
	NITIO_G0_DMA_STATUS,
	NITIO_G1_DMA_STATUS,
	NITIO_G2_DMA_STATUS,
	NITIO_G3_DMA_STATUS,
	NITIO_G0_ABZ,
	NITIO_G1_ABZ,
	NITIO_G0_INT_ACK,
	NITIO_G1_INT_ACK,
	NITIO_G2_INT_ACK,
	NITIO_G3_INT_ACK,
	NITIO_G0_STATUS,
	NITIO_G1_STATUS,
	NITIO_G2_STATUS,
	NITIO_G3_STATUS,
	NITIO_G0_INT_ENA,
	NITIO_G1_INT_ENA,
	NITIO_G2_INT_ENA,
	NITIO_G3_INT_ENA,
	NITIO_NUM_REGS,
};

enum ni_gpct_variant {
	ni_gpct_variant_e_series,
	ni_gpct_variant_m_series,
	ni_gpct_variant_660x
};

struct ni_gpct {
	struct ni_gpct_device *counter_dev;
	unsigned int counter_index;
	unsigned int chip_index;
	u64 clock_period_ps;	/* clock period in picoseconds */
	struct mite_channel *mite_chan;
	spinlock_t lock;	/* protects 'mite_chan' */
};

struct ni_gpct_device {
	struct comedi_device *dev;
	void (*write)(struct ni_gpct *, unsigned int value,
		      enum ni_gpct_register);
	unsigned int (*read)(struct ni_gpct *, enum ni_gpct_register);
	enum ni_gpct_variant variant;
	struct ni_gpct *counters;
	unsigned int num_counters;
	unsigned int regs[NITIO_NUM_REGS];
	spinlock_t regs_lock;		/* protects 'regs' */
};

struct ni_gpct_device *
ni_gpct_device_construct(struct comedi_device *,
			 void (*write)(struct ni_gpct *,
				       unsigned int value,
				       enum ni_gpct_register),
			 unsigned int (*read)(struct ni_gpct *,
					      enum ni_gpct_register),
			 enum ni_gpct_variant,
			 unsigned int num_counters);
void ni_gpct_device_destroy(struct ni_gpct_device *);
void ni_tio_init_counter(struct ni_gpct *);
int ni_tio_insn_read(struct comedi_device *, struct comedi_subdevice *,
		     struct comedi_insn *, unsigned int *data);
int ni_tio_insn_config(struct comedi_device *, struct comedi_subdevice *,
		       struct comedi_insn *, unsigned int *data);
int ni_tio_insn_write(struct comedi_device *, struct comedi_subdevice *,
		      struct comedi_insn *, unsigned int *data);
int ni_tio_cmd(struct comedi_device *, struct comedi_subdevice *);
int ni_tio_cmdtest(struct comedi_device *, struct comedi_subdevice *,
		   struct comedi_cmd *);
int ni_tio_cancel(struct ni_gpct *);
void ni_tio_handle_interrupt(struct ni_gpct *, struct comedi_subdevice *);
void ni_tio_set_mite_channel(struct ni_gpct *, struct mite_channel *);
void ni_tio_acknowledge(struct ni_gpct *);

#endif /* _COMEDI_NI_TIO_H */