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usr
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src
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linux-headers-6.8.0-83-generic
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include
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linux
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comedi
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comedi_8255.h
/* SPDX-License-Identifier: GPL-2.0+ */ /* * comedi_8255.h * Generic 8255 digital I/O subdevice support * * COMEDI - Linux Control and Measurement Device Interface * Copyright (C) 1998 David A. Schleef <ds@schleef.org> */ #ifndef _COMEDI_8255_H #define _COMEDI_8255_H #include <linux/errno.h> #define I8255_SIZE 0x04 #define I8255_DATA_A_REG 0x00 #define I8255_DATA_B_REG 0x01 #define I8255_DATA_C_REG 0x02 #define I8255_CTRL_REG 0x03 #define I8255_CTRL_C_LO_IO BIT(0) #define I8255_CTRL_B_IO BIT(1) #define I8255_CTRL_B_MODE BIT(2) #define I8255_CTRL_C_HI_IO BIT(3) #define I8255_CTRL_A_IO BIT(4) #define I8255_CTRL_A_MODE(x) ((x) << 5) #define I8255_CTRL_CW BIT(7) struct comedi_device; struct comedi_subdevice; #ifdef CONFIG_HAS_IOPORT int subdev_8255_io_init(struct comedi_device *dev, struct comedi_subdevice *s, unsigned long regbase); #else static inline int subdev_8255_io_init(struct comedi_device *dev, struct comedi_subdevice *s, unsigned long regbase) { return -ENXIO; } #endif int subdev_8255_mm_init(struct comedi_device *dev, struct comedi_subdevice *s, unsigned long regbase); int subdev_8255_cb_init(struct comedi_device *dev, struct comedi_subdevice *s, int (*io)(struct comedi_device *dev, int dir, int port, int data, unsigned long context), unsigned long context); unsigned long subdev_8255_regbase(struct comedi_subdevice *s); #endif
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