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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright 2022 William Breathitt Gray */
#ifndef _IDIO_16_H_
#define _IDIO_16_H_
#include <linux/spinlock.h>
#include <linux/types.h>
/**
* struct idio_16 - IDIO-16 registers structure
* @out0_7: Read: FET Drive Outputs 0-7
* Write: FET Drive Outputs 0-7
* @in0_7: Read: Isolated Inputs 0-7
* Write: Clear Interrupt
* @irq_ctl: Read: Enable IRQ
* Write: Disable IRQ
* @filter_ctl: Read: Activate Input Filters 0-15
* Write: Deactivate Input Filters 0-15
* @out8_15: Read: FET Drive Outputs 8-15
* Write: FET Drive Outputs 8-15
* @in8_15: Read: Isolated Inputs 8-15
* Write: Unused
* @irq_status: Read: Interrupt status
* Write: Unused
*/
struct idio_16 {
u8 out0_7;
u8 in0_7;
u8 irq_ctl;
u8 filter_ctl;
u8 out8_15;
u8 in8_15;
u8 irq_status;
};
#define IDIO_16_NOUT 16
/**
* struct idio_16_state - IDIO-16 state structure
* @lock: synchronization lock for accessing device state
* @out_state: output signals state
*/
struct idio_16_state {
spinlock_t lock;
DECLARE_BITMAP(out_state, IDIO_16_NOUT);
};
/**
* idio_16_get_direction - get the I/O direction for a signal offset
* @offset: offset of signal to get direction
*
* Returns the signal direction (0=output, 1=input) for the signal at @offset.
*/
static inline int idio_16_get_direction(const unsigned long offset)
{
return (offset >= IDIO_16_NOUT) ? 1 : 0;
}
int idio_16_get(struct idio_16 __iomem *reg, struct idio_16_state *state,
unsigned long offset);
void idio_16_get_multiple(struct idio_16 __iomem *reg,
struct idio_16_state *state,
const unsigned long *mask, unsigned long *bits);
void idio_16_set(struct idio_16 __iomem *reg, struct idio_16_state *state,
unsigned long offset, unsigned long value);
void idio_16_set_multiple(struct idio_16 __iomem *reg,
struct idio_16_state *state,
const unsigned long *mask, const unsigned long *bits);
void idio_16_state_init(struct idio_16_state *state);
#endif /* _IDIO_16_H_ */
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