/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Header file for NI general purpose counter support code (ni_tio.c)
*
* COMEDI - Linux Control and Measurement Device Interface
*/
#ifndef _COMEDI_NI_TIO_H
#define _COMEDI_NI_TIO_H
#include <linux/comedi/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 *counter, unsigned int value,
enum ni_gpct_register);
unsigned int (*read)(struct ni_gpct *counter, enum ni_gpct_register);
enum ni_gpct_variant variant;
struct ni_gpct *counters;
unsigned int num_counters;
unsigned int num_chips;
unsigned int (*regs)[NITIO_NUM_REGS]; /* [num_chips][NITIO_NUM_REGS] */
spinlock_t regs_lock; /* protects 'regs' */
const struct ni_route_tables *routing_tables; /* link to routes */
};
struct ni_gpct_device *
ni_gpct_device_construct(struct comedi_device *dev,
void (*write)(struct ni_gpct *counter,
unsigned int value,
enum ni_gpct_register),
unsigned int (*read)(struct ni_gpct *counter,
enum ni_gpct_register),
enum ni_gpct_variant,
unsigned int num_counters,
unsigned int counters_per_chip,
const struct ni_route_tables *routing_tables);
void ni_gpct_device_destroy(struct ni_gpct_device *counter_dev);
void ni_tio_init_counter(struct ni_gpct *counter);
int ni_tio_insn_read(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
int ni_tio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
int ni_tio_insn_write(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
int ni_tio_cmd(struct comedi_device *dev, struct comedi_subdevice *s);
int ni_tio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_cmd *cmd);
int ni_tio_cancel(struct ni_gpct *counter);
void ni_tio_handle_interrupt(struct ni_gpct *counter,
struct comedi_subdevice *s);
void ni_tio_set_mite_channel(struct ni_gpct *counter,
struct mite_channel *mite_chan);
void ni_tio_acknowledge(struct ni_gpct *counter);
/*
* Retrieves the register value of the current source of the output selector for
* the given destination.
*
* If the terminal for the destination is not already configured as an output,
* this function returns -EINVAL as error.
*
* Return: the register value of the destination output selector;
* -EINVAL if terminal is not configured for output.
*/
int ni_tio_get_routing(struct ni_gpct_device *counter_dev,
unsigned int destination);
/*
* Sets the register value of the selector MUX for the given destination.
* @counter_dev:Pointer to general counter device.
* @destination:Device-global identifier of route destination.
* @register_value:
* The first several bits of this value should store the desired
* value to write to the register. All other bits are for
* transmitting information that modify the mode of the particular
* destination/gate. These mode bits might include a bitwise or of
* CR_INVERT and CR_EDGE. Note that the calling function should
* have already validated the correctness of this value.
*/
int ni_tio_set_routing(struct ni_gpct_device *counter_dev,
unsigned int destination, unsigned int register_value);
/*
* Sets the given destination MUX to its default value or disable it.
*
* Return: 0 if successful; -EINVAL if terminal is unknown.
*/
int ni_tio_unset_routing(struct ni_gpct_device *counter_dev,
unsigned int destination);
#endif /* _COMEDI_NI_TIO_H */
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